Write a paragraph comparing one bulb in series, two bulbs in series, and two bulbs in parallel.
What did you learn?
Answers
Answer:
Explanation:
The series circuit with two light bulbs will illuminate more than the series with one light bulb because two light bulbs will have more energy as compared to one light bulb.
Related Questions
HW3_2 According to Archimedes, if a solid that is lighter than a fluid is placed in the fluid, the solid will be immersed to such a depth that the weight of the solid is equal to the weight of the displaced fluid. To find the depth, x, at which the ball floats, this equation must be solved: rho c
V c
=rho w
(πx 2
r− 3
πx 3
) Find the floating depth for a cork ball of radius 2 cm whose density (rho c
) is one-fifth that of water using secant method to an accuracy of 3 sig figs. Write a script and publish to generate pdf and submit on Blackboard. [ Use CGS units ]
Answers
Given, Radius of Cork ball, r = 2 cm Density of Cork ball, ρc = 1/5 ρw We know, If a solid that is lighter than a fluid is placed in the fluid, the solid will be immersed to such a depth that the weight of the solid is equal to the weight of the displaced fluid.
i.e, ρc Vc g = ρw Vw g ρc /ρw = Vw / Vc From this we can conclude that the volume of displaced fluid is equal to the volume of the immersed object. Vw = Vc = (4/3)πr³ Volume of Cork Ball Substituting the given values
ρc/ρw = 1/5
=> ρw = 5ρcVc = (4/3)πr³
=> Vc = (4/3)π(2)³ = 32/3 π cm³Vw
= Vc => Vw = 32/3 π cm³
Now, the equation we have is,ρc Vc = ρw(πx²r - 3πx³ /3) => ρc/ρw (4/3)πr³ = πx²r - πx³= 4/3 r²x - x³/3
Using secant method to an accuracy of 3 sig figs,
F(xn-1) = 4/3 r²xn-1 - xn-1³/3
F(xn) = 4/3 r²xn - xn³/3F(xn-1) - F(xn) / (xn-1 - xn) =
f(x) = 4/3 r²x - x³/3x1 = 0.1 cm and x2 = 0.2 cm
F(x1) = 4/3 (2)²(0.1) - (0.1)³/3 = 0.03407
F(x2) = 4/3 (2)²(0.2) - (0.2)³/3 = -0.08226x2 - x1 = 0.1
F(x2) - F(x1) = -0.11633x3 = 0.2 - 0.08226/(-0.11633)
= 0.8546F(x3) = 4/3 (2)²(0.8546) - (0.8546)³/3
= -0.0000171 cm.
Therefore, the floating depth of the cork ball is 0.855 cm (approx).
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A light beam travels at 1.34×10^8 m/s in diamond. The wavelength of the light in diamond is 246 nm
Part A
What is the index of refraction of diamond at this wavelength?
Part B
If this same light travels through air, what is its wavelength there
Answers
Answer:
Part A: 2.24
Part B: 551 nm
Explanation:
Part A:\(n_1*v_1=n_2*v_2\) (n1 and n2 are the indexes of refraction, and v1 and v2 are the velocities of light)
Rearrange to isolate n2: \(\frac{n_1*v_1}{v_2} =n_2\)
Speed of light in a vacuum is 3*10^8 m/s, and a vacuum has index of refraction of 1.
\(n_2=\frac{1*3*10^8}{1.34*10^8}\) = 2.24
Part B:Air has index of refraction of about 1, so speed of light in air is about 3*10^8 m/s.
Speed of light is its frequency times its wavelength. Travelling through different mediums does not affect the frequency of the light.
v = λ*f (c is speed of light in diamond, λ is wavelength of light, and f is frequency of light)
Rearrange to isolate f: f = v/λ
246 nm = 2.46*10^-7 m
f = \(\frac{1.34*10^8}{2.46*10^{-7}}\) = 5.45*10^14 Hz
To find wavelength of light in air, rearrange v = λ*f to λ = v/f = \(\frac{3*10^8}{5.45*10^{14}}\) = 5.51*10^-7 m = 551 nm
Part a. The index of refraction of diamond at this wavelength is 0.0434.
Part b. The wavelength of the light in air is approximately 1.06× \(10^8\) m/s.
The index of refraction of diamond at this wavelength, we need to use the formula:
n = c/v
here n is the index of refraction, c is the speed of light in a vacuum, and v is the speed of light in the medium. We know that the speed of light in a vacuum is 299,792,458 m/s, so we can substitute this value into the formula:
n = (1.34× \(10^8\) m/s)/(299,792,458 m/s)
n = 0.0434
The index of refraction of diamond at this wavelength is 0.0434.
The wavelength of the light in air, we can use the formula:
wavelength = c/n
here wavelength is the wavelength of the light in air, and n is the index of refraction of air. We know that the index of refraction of air is 1, so we can substitute this value into the formula:
wavelength = (1.34× \(10^8\) m/s)/(1)
wavelength = 1.34× \(10^8\) m/s
Therefore, the wavelength of the light in air is approximately 1.06× \(10^8\) m/s.
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Carlos listed some advantages and disadvantages of using nonrenewable resources. Which best describes Carlos's error? Coal is not plentiful anywhere. Coal generates very little energy. Ores do not make many useful products. Ores must be processed.
Answers
Answer:
This question is incomplete as it lacks the table that shows the advantages and disadvantages of the two mentioned nonrenewable source of energy (coal and ore). However, the question can be answered based on general understanding.
The answer is D. Ores must be processed.
Explanation:
Energy can be of two major sources namely: renewable and nonrenewable sources. Based on the mentioned area in this question, NONRENEWABLE SOURCES OF ENERGY are those sources of energy that cannot be replenished or replaced when exhausted. They are utilized faster than they form. Examples of nonrenewable sources of energy are coal, ores, fuel etc.
According to this question, Carlos listed some advantages and disadvantages of using nonrenewable resources. However, among the listed disadvantages, Carlo's error is that he included that: ORES MUST Be PROCESSED.
Ores are rock materials that contain metals, which are extracted and purified in a series of processing techniques. Hence, ORES NEED PROCESSING making Carlo's claim erroneous.
Answer:
Carlos listed some advantages and disadvantages of using nonrenewable resources.
Which best describes Carlos’s error?
Coal is not plentiful anywhere.
Coal generates very little energy.
Ores do not make many useful products.
Ores must be processed.
Explanation:
the answer is DCan the sun explain global warming? ( 2 points) Suppose that the Earth has warmed up by 1 K in the last hundred years. i) How much would the solar constant have to increase to explain this? ii) Compare this to the observed fluctuation of the solar constant over the past 400 years (shown in class) For part (i), begin with the standard 'blackbody' calculation from class, that is: set α=0.30, and assume that the Earth acts as a blackbody in the infrared.
Answers
No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.
This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.
i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.
ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.
The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.
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what is physics?
in detail.....
Answers
Answer:
Physics is the study of the interactions between physical systems. The physicist attempts to describe the interaction with the most fundamental and general law or principle possible. ... All electrical phenomena involve the interaction between positive and negative charges.
Answer:
What is Physics at NTNU?
Physics is a natural science based on experiments, measurements and mathematical analysis with the purpose of finding quantitative physical laws for everything from the nanoworld of the microcosmos to the planets, solar systems and galaxies that occupy the macrocosmos.
The laws of nature can be used to predict the behaviour of the world and all kinds of machinery. Many of the everyday technological inventions that we now take for granted resulted from discoveries in physics. The basic laws in physics are universal, but physics in our time is such a vast field that many subfields are almost regarded as separate sciences.
The early Greeks established the first quantitative physical laws, such as Archimedes' descriptions of the principle of levers and the buoyancy of bodies in water. But they did not actually conduct experiments, and physics as science stagnated for many centuries. By the 17th century, however, Galileo Galilei and later Issac Newton helped pioneer the use of mathematics as a fundamental tool in physics, which led to advances in describing the motion of heavenly bodies, the laws of gravity and the three laws of motion.
The laws of electricity, magnetism and electromechanical waves were developed in the 1800s by Faraday and Maxwell, in particular, while many others contributed to our understanding of optics and thermodynamics.
Modern physics can be said to have started around the turn of the 20th century, with the discovery of X-rays (Röntgen 1895), radioactivity (Becquerel 1896), the quantum hypothesis (Planck 1900), relativity (Einstein 1905) and atomic theory (Bohr 1913).
Quantum mechanics (Heisenberg and Schrödinger), beginning in 1926, also gave scientists a better understanding of chemistry and solid state physics, which in turn has led to new materials and better electronic and optical components. Nuclear and elementary particle physics have become important fields, and particle physics is now the basis for astrophysics and cosmology.
Block A rests on a horizontal tabletop. A light horizontal rope is attached to it and passes over a pulley, and block B is suspended from the free end of the rope. The light rope that connects the two blocks does not slip over the surface of the pulley (radius 0.080 m) because the pulley rotates on a frictionless axle. The horizontal surface on which block A (mass 4.10 kg) moves is frictionless. The system is released from rest, and block B (mass 5.00 kg) moves downward 1.80 m in 2.00 s.
Requied:
What is the moment of inertia of the pulley for rotation about the axle on which it is mounted?
Answers
The moment of inertia of the pulley for rotation about the axle on which it is mounted is -0.0118 kg m².
Mass of block A, mA = 4.1 kg
Mass of block B, mB = 5.0 kg
Distance moved by block B, s = 1.80 m
Time taken to move distance s, t = 2.0 s
Radius of pulley, r = 0.080 m
We know that the work done by the tension force, T, is equal to the change in potential energy of the block B.
Here, we can make the following observations:
Block B is moving downwards and Block A is moving towards the right. So, the directions of gravitational forces acting on the two blocks are opposite.
Block A is moving on a frictionless surface. So, the work done by the friction force on Block A is zero.
In this case, we can use the work-energy principle to calculate the tension force, T.
First, let us calculate the change in potential energy of block B.
The initial position of Block B is taken to be the position where the rope is taut, but the block is still at rest.
The final position is when it moves downward by s = 1.80 m.
The direction of the gravitational force is downward.
Therefore, ∆PE = mgh= 5.0 × 9.8 × 1.80= 88.2 J
Now, according to the work-energy principle, the work done by the tension force T on Block B is equal to the change in potential energy of Block B.W = ∆PE
We know that, W = T × s = T × d
Therefore, T × s = ∆PE5.0 × g × s = 88.2T = 88.2/(5.0 × 9.8 × 1.80) = 1.00 N
Let the acceleration of Block B be a and the angular acceleration of the pulley be α.
We have, T = mBga + Iα
Here, a is the linear acceleration of the block B and is given by
a = s/t= 1.80/2.0= 0.90 m/s²
Now, consider the pulley. It has two masses that are symmetrically placed at a distance of r = 0.080 m from the axis of rotation. The masses are connected to each other and the tension force acts on them in opposite directions.
Therefore, we can use the parallel-axis theorem to calculate the moment of inertia of the pulley.
I = I cm + Md² where,
I cm is the moment of inertia of the pulley about its center of mass,
M is the mass of the pulley, and
d = r is the distance between the center of mass and the axis of rotation of the pulley.
Let the pulley rotate by an angle θ in time t, so that the angular velocity of the pulley is ω and the tangential velocity of the pulley at its rim is v.
Then,ω = αt and v = rω
Now, the acceleration of the pulley can be calculated as follows: a = rα
Thus, the tension force acting on the pulley can be written as T = Ia/r²
Here, the tension force acts in the opposite direction to the direction of motion of Block A.
Therefore, the acceleration of Block A can be calculated as follows:
F = maT = mAa => a = T/mA = 1.00/4.1 = 0.244 m/s²
Now, we can use the above equations to calculate the moment of inertia of the pulley.
I = (T/mA) × r² × (1/a) - M(r² + d²)= (1.00/4.1) × (0.080)² × (1/0.244) - (0.080² + 0.080²) × (4.1 + 5.0)= 0.00408 - 0.01592= -0.0118 kg m²
Since the pulley is positioned on an axle, its moment of inertia for rotation about the axle is -0.0118 kg m2.
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In a closed system that has 560 J of mechanical energy, the gravitational potential energy of a weight being lowered by a pulley decreases from 250 J to 175 J. How does the systems kinetic energy change if there is no friction?
Answers
Taking into account the definition of kinetic, potencial and mechanical energy, the kinetic energy increases from 310 J to 385 J.
Kinetic energyKinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.
Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and at rest, until it reaches a given speed. Once this point is reached, the amount of accumulated kinetic energy will remain the same unless there is a change in speed or the body returns to its state of rest by applying a force.
Potential energyOn the other hand, potential energy is the energy that measures the ability of a system to perform work based on its position. In other words, this is the energy that a body has at a certain height above the ground.
Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity.
Mechanical energyFinally, mechanical energy is that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. Then:
Potential energy + kinetic energy = total mechanical energy
Principle of conservation of mechanical energyThe principle of conservation of mechanical energy indicates that the mechanical energy of a body remains constant when all the forces acting on it are conservative (a force is conservative when the work it does on a body depends only on the initial and final points and not the path taken to get from one to the other.)
Therefore, if the potential energy decreases, the kinetic energy will increase. In the same way, if the kinetics decreases, the potential energy will increase.
This caseIn a closed system that has 560 J of mechanical energy, the gravitational potential energy of a weight being lowered by a pulley decreases from 250 J to 175 J.
Conidering that the principle of conservation of mechanical energy can be applied, in the beginning:
250 J + kinetic energy = 560 J
Solving:
kinetic energy = 560 J - 250 J
kinetic energy= 310 J
In the end:
175 J + kinetic energy = 560 J
kinetic energy = 560 J - 175 J
kinetic energy = 385 J
Finally, the kinetic energy increases from 310 J to 385 J.
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what does the 4 mean in 4Cu(NO3)2
1) subscript 2) exponent 3) multiplier 4) coefficient
Answers
Answer:
4) Coefficent in science
A sports car starts at rest at the starting marker then picks up speed, then passes the finish marker in 4.1 seconds. The markers are separated by 120 meters. What is the car's speed at the second marker?
Answers
Answer:
S=29.298m/s
Explanation:
Use S=d/t
So, S=120m/4.1s= 29.298m/s
F चाप इनारको हिसाव गनुहास् । (The depth of water in a well is 17 m. Calculate the pressure exerted by the water at the bottom of the well.) [2] Ans : 170000 pa
Answers
The pressure exerted by the water at the bottom of the well is 170000 Pa.
What is the pressure exerted at the bottom of the well?We can use the formula for pressure due to a liquid:
pressure = density × gravity × height
where;
density is the density of the liquidgravity is the acceleration due to gravity, and height is the height of the liquid.Assuming the density of water is 1000 kg/m³ and the acceleration due to gravity is 9.81 m/s², we can calculate the pressure at the bottom of the well as:
pressure = 1000 kg/m³ × 9.81 m/s² × 17 m
pressure = 166970 Pa
Rounding off to two significant figures, the pressure exerted by the water at the bottom of the well is 170000 Pa.
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understanding where earthquakes occur can help develop ways to lessen their effects because...please help dudes ;-;
Answers
Answer:
build the resilience of the society physically, socially and economically.
Explanation:
They actually build the resilience of the society , physically or socially or economically All three .
two people are trying to push a refrigerator. one person is pushing at an angle that is parallel to the floor and 70° to the front plane of the refrigerator with a force of 400 n, and the other is pushing at an angle that is parallel to the floor and 110∘ to the front p
Answers
Answer: As friction force is less than the Resultant
force so they will be able to move the fridge
Explanation:
top view of fridge
Angle between forces B= 180- 70- (186-110 )
= 170 - 70 = 40 -
Resultant of forces .
R = 1 ( FOR + ( 82 ) 2 + 2 FIF2 COS B .
J (40B) " + ( 375 ) 2 + 2 x 400 * 375 x Cos 40 "
7 28 - 31 1 N .
() friction force = 600.
As friction force is less than the Resultant
force so they will be able to move the fridge
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There is 728.311N force acting on the front plane. while two individuals attempt to push a refrigerator. Pushing with a force of 400 N, one person is positioned with their back.
Angle between forces B= 180- 70- (186-110 )
= 170 - 70 = 40
R= \(\sqrt{(F1^{2} )+(F2^{2})+2F1F2cos\alpha }\)
Here F1= 400
F2=375
alpha = 40
Resultant of forces .
728 . 31 1 N
friction force = 600.
friction force.
The refrigerator can be moved since the friction force is smaller than the resultant force.
Force's Definition. When an object interacts with another object, it experiences a push or pull that is known as a force. Every time two things interact, a force is applied to each of them.
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Katie rolls a toy car off the end of a table.
A car sits on a tall orange box with a shorter orange box in front if it. A short line from the car leads to line A, which points straight down to the shorter box, line B, which leads down to the shorter box at an angle, line C, which curves down to the shorter box, and line D, which extends past lines A-C and then points straight down to the shorter box.
Which path will the car follow when it leaves the table?
A
B
C
D
Answers
Answer:
The correct answer is C.) C
Explanation:
I just did the test on edge and got it right
A car sits on a tall orange box with a shorter orange box in front if it. A short line from the car leads to line, which curves down to the shorter box, and line. Therefore, the correct option is option C.
What is car toy?Many of us do not pause to contemplate the importance of play in the lives of children, whether they are our own or the children of friends and relatives. We just take it for granted that kids spend their free time driving toy trucks about or pretending to be dragons (or both), and although it's amusing (certainly for them and occasionally for us), we don't give it much thought beyond that.
It's a great time to start playing with cars, dump trucks, and other vehicles. Not that they'll need much convincing: boys, in particular, appear to be captivated to anything that includes wheels long before their first birthday. which curves down to the shorter box, and line.
Therefore, the correct option is option C.
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Does static electricity attract dead skin cells
Answers
Answer:
no i dont think so
Explanation:
If the average intensity of the sunlight in Maricopa County is 1100 W/m2, what is the average magnitude of the force this light exerts on a 0.2 m2 surface of a perfect mirror that perfectly reflects the light
Answers
This means that the average magnitude of the force that sunlight exerts on a 0.2 m2 surface of a perfect mirror is 3.67 x 10^-6 N.
To find the average magnitude of the force that sunlight exerts on a 0.2 m2 surface of a perfect mirror, we need to use the formula for radiation pressure.
Radiation pressure is the force exerted by the electromagnetic radiation of a light wave on a surface. The formula for radiation pressure is P = I/c, where P is the pressure, I is the intensity of the radiation, and c is the speed of light.
In this case, the average intensity of the sunlight in Maricopa County is given as 1100 W/m2. We can use this value to calculate the pressure exerted by the sunlight on a 0.2 m2 surface of a perfect mirror.
First, we need to convert the intensity of the sunlight from W/m2 to N/m2, which is the unit of pressure. We know that 1 W/m2 = 1 N/m2, so the intensity of the sunlight is also 1100 N/m2.
Next, we need to divide the intensity by the speed of light, which is approximately 3 x 10^8 m/s.
P = I/c = 1100 N/m2 ÷ 3 x 10^8 m/s = 3.67 x 10^-6 N/m2
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The device that is made up of many single slits that diffract light and form a diffraction pattern , is called
Answers
Gọi là máy quang phổ kế
That's a diffraction grating.
14. All motion is relative to a reference point. (5 points)
True
False
Answers
Answer:
yes
Explanation:
All Motion is relative to a reference point. Object appears to move whether object moves, the reference point moves, or both move. is the distance traveled by an object over the period of time in which it moved. Ex - a racecar driver completes a three-mile lap in 60 seconds.
The statement "All Motion is relative to a reference point." is True.
What is frame of reference?An inertial frame of reference is a frame of reference in which the Newton's laws are valid. In this frame of reference, the objects do not accelerate without any external force. All frames of reference moving with constant velocity are considered stationary.
In a non-inertial frame of reference, the Newton's laws will not work. They are moving with an acceleration.
All Motion is relative to a reference point. Object appears to move, the reference point moves, or both move is the distance traveled by an object over the period of time..
Thus, the statement "All Motion is relative to a reference point." is True.
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name the proces by which heat flows in solids
Answers
Answer:
conduction
Explanation:
conduction is the movement of heat from one point to another on a metal.
Hope it helps.
31. A man can lift 600 kg on the surface of the moon. He can lift on the earth is:
(2 Points)
100 kg
O 600 kg
0 60 kg
980 kg
Answers
Answer:
He can lift on the earth is 60 kg
The Coulomb force between two charges q1 and q2 at separation r in air is F. If half of the separation is filled with medium of dielectric constant 9, what will be the value of new coulomb force?
Answers
Answer:
The new Coulomb force is q₁q₂/9πε₀r²
Explanation
The coulomb force between the two charges q₁ and q₂ at a distance r in air is given by F = q₁q₂/4πε₀r².
Now, let us assume the material of dielectric constant κ = 9 is placed between them on the side of the q₁ charge. The value of its effective charge is now q₃ = q₁/κ at a distance of d = r/2 from the q₂ charge.
Since we have air between q₂ and q₃, the coulomb force between them is
F' = q₂q₃/4πε₀d²
= q₂(q₁/κ)/4πε₀(r/2)²
= 4q₂q₁/κ4πε₀r²
= 4/κ(q₂q₁/4πε₀r²)
= 4/9 × (q₂q₁/4πε₀r²)
= q₁q₂/9πε₀r²
So, the new Coulomb force is q₁q₂/9πε₀r²
can someone help me?
Answers
Answer:
B
Explanation:
Y won't sink because his shoes have wider area
Air is expanded in a polytropic process with n = 1.2 from 1 MPa and 400°C to 110 kPa in a piston?cylinder device. Determine the final temperature of the air.
Select one:
a. 466 C
b. 123.6 C
c. 193 C
d. 290 C
Answers
The final temperature of the air is (c) 193°C.
Explanation:-
Given,
The initial pressure, P1 = 1 MPa
The initial temperature, T1 = 400 °C
The final pressure, P2 = 110 kPa
The polytropic exponent, n = 1.2
We need to determine the final temperature of the air.
Solution:
For the polytropic process with a given polytropic exponent n, the work done can be given as;
W = P1V1 (1 - n) / (n - 1) [1 - (P2 / P1) ((n - 1) / n)] -------------- [1]
Where,V1 = (mRT1) / P1 ------------- [2]
V2 = (mRT2) / P2 ------------- [3]
Combining equations [2] and [3], we get;
V2 / V1 = P1 / P2 * T2 / T1T2
= T1 (V2 / V1) * (P2 / P1) --------------- [4]
Now, substituting equation [2] into equation [1],
we get;
W = (mRT1) / P1 * (1 - n) / (n - 1) [1 - (P2 / P1) ((n - 1) / n)]
Also, substituting equation [4] into equation [1],
we get;
W = (mR T1) / P1 (1 - n) / (n - 1) [1 - (P2 / P1) ((n - 1) / n)]T2
= T1 (1 - n) / n [1 - (P2 / P1) (n - 1)] ------------ [5]
where m is the mass of the gas and R is the gas constant.
For air, the value of R is 0.287 kJ/kg.K.
Substituting the values in equation [5],
we get;T2 = 400 × (1 - 1.2) / 1.2 [1 - (110 / 1000) (1.2 - 1)]
= -220.34 K (-53.81°C)
However, the final temperature of the air cannot be negative.
Therefore, the process must be irreversible or isothermal.
Thus, the option (c) 193°C is the correct answer.
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a planet has a mass of 7.70 × 1023 kg and a radius of 2.86 × 106 m. (a) what is the acceleration due to gravity on this planet? (b) how much would a 78.1-kg person weigh on this planet?
Answers
(a) The acceleration due to gravity on the planet is approximately 2.71 m/s².
(b) A 78.1-kg person would weigh approximately 211.51 N on this planet.
(a) To calculate the acceleration due to gravity on the planet, we can use the formula for gravitational acceleration:
g = G * (m / r²),
where g is the acceleration due to gravity, G is the gravitational constant (approximately 6.67 × 10⁻¹¹ N(m/kg)²), m is the mass of the planet, and r is the radius of the planet.
Plugging in the values:
g = (6.67 × 10⁻¹¹ N(m/kg)²) * (7.70 × 10²³ kg) / (2.86 × 10⁶ m)²
g ≈ 2.71 m/s²
Therefore, the acceleration due to gravity on the planet is approximately 2.71 m/s².
(b) To determine how much a 78.1-kg person would weigh on this planet, we can use the formula for weight:
Weight = mass * acceleration due to gravity.
Plugging in the values:
Weight = 78.1 kg * 2.71 m/s²
Weight ≈ 211.51 N
Therefore, a 78.1-kg person would weigh approximately 211.51 N on this planet.
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what is practical machine?
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Explanation:
A practical machine is a simple machine that losses energy and have parts that have weights, friction and it causes some loss of work done.
The sum of the kinetic and potential energies of a system of objects is conserved: Group of answer choices only when no external force acts on the objects only when the objects move along closed paths only when the work done by the resultant external force is zero none of the above
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The sum of the kinetic and potential energies of a system of objects is conserved only when no external force acts on the objects.
Conservation of mechanical energyThe principle of conservation of mechanical energy states that the total mechanical energy of an isolated system (absence of external force) is always constant.
M.A = P.E + K.E
where;
P.E is potential energy
K.E is kinetic energy
Thus, the sum of the kinetic and potential energies of a system of objects is conserved only when no external force acts on the objects.
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A point charge of -3. 00 μC is located in the center of a spherical cavity of radius 6. 80 cm inside an insulating spherical charged solid. The charge density in the solid is 7. 35 x 10^-4 C/m^3
Calculate the magnitude of the electric field inside the solid at a distance of 9. 30 cm from the center of the cavity
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A point charge of -3. 00 μC is located in the center of a spherical cavity of radius 6. 80 cm inside an insulating spherical charged solid. The charge density in the solid is 7. 35 x 10^-4 C/m^3. The magnitude of the electric field inside the solid at a distance of 9.20 cm from the center of the cavity is 394.6857x10⁻⁶ N/C.
Charge inside the cavity = -3μC = -3x10⁻⁶ C
Charge density of the sphere, ρ = 7.35x 10⁻⁴ C/m³
Radius of he cavity = 6.90 cm = 0.0690 m
We have to find the electric field at a radius of 9.20 cm, therefore, the effective radius,
Effective radius = 0.092-0.069 = 0.023 m
Effective Volume = \(\frac{4}{3}\) π\(r^{3}\)= 0.5093 x10⁻⁴ m³
The charge, Q = volume x charge density = 374.33 x 10⁻⁶ C
The net charge enclosed,
\(Q_{in} =(374.33-3)x10^{-6} =371.33 x10^{-6}\)C
We know according to the Gauss law,
⇒E=\(\frac{Q_{in} }{e_{o} }\)
E=394.6857 X\(10^{-6}\)N/C
Hence, the magnitude of the electric field inside the solid at a distance of 9.20 cm from the center of the cavity is 394.6857x10⁻⁶ N/C.
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2.0m³ of gas is stored at a pressure of 12 atmosphere and a temperature of -23⁰cwhat volume would that same gas occupy at 27⁰c and atmosphere pressure?
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Given that in the first case,
the volume of the gas is
\(V_1=2m^3\)The pressure of the gas is
\(P_1\text{ = 12 atm}\)The temperature of the gas is
\(\begin{gathered} T_1=-23^{\circ\text{ }}C+273.15 \\ =250.15\text{ K} \end{gathered}\)In the second case,
the pressure of the gas is
\(P_2=\text{ 1 atm}\)The temperature of the gas is
\(\begin{gathered} T_2=27^{\circ}C+273.15 \\ =\text{ 300.15 K} \end{gathered}\)We have to find the volume, V2.
The volume v2 can be calculated as
\(\begin{gathered} \frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} \\ V_2=\text{ }\frac{P_1V_1T_2}{P_2T_1} \\ =\frac{12\times2\times(250.15)}{1\times(300.15)} \\ =20.00m^3 \end{gathered}\)Two protons enter a region of the transverse magnetic field. What will be the ratio of the time period of revolution if the ratio of energy is 2√2 : √3 ?
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Given:
ratio of energy is 2√2 : √3
Apply:
\(T=2\pi\sqrt[\frac{}{}]{\frac{mr}{qBv}}\)Where:
q = charge of proton
v= speed of proton
r= radius of circular path
T= time period of revolution
Kinetic energy (K)
K= 1/2mv^2
From both equations:
Tα1/k
K1:K2 = 2√2 : √3
T1:T2 = √3:2√2
Answer: √3:2√2
Potassium-38 undergoes beta decay. In addition to the beta particle, which product forms?
A. 3820 Ca
B. 3818 Ar
C. 3718 Ar
D. 3920 Ca
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beta β = ₋₁e⁰ particles
₁₉K³⁸ ⇒ ₋₁e⁰ + ₂₀Ca³⁸ (A)
if everything in the solar system is moving around, why do the perseid meteors repeat regularly around august 11th or so?
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The Perseid meteors repeat regularly around August 11th or so, despite everything in the solar system moving around, because the debris that creates them follows a consistent orbit.
The orbit of the debris producing the meteor shower is consistent, and it orbits the Sun in the same manner every year. When the Earth crosses through the debris stream, the debris enters the Earth's atmosphere and burns up, producing the Perseid meteor shower.This means that even if the Earth's movement is unpredictable, as it revolves around the Sun, the Perseid meteor shower will occur around the same time every year.
Hence, it's not because of the Earth's movement or other bodies in the solar system that the Perseid meteors repeat regularly around August 11th or so, but because of the consistent orbit of the debris that creates them.
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