The energy of a photon of electromagnetic radiation with a frequency of 73231548 Hz is 4.85318e-19 J.
Electromagnetic radiation is a form of energy that travels through space at the speed of light. The energy of a single photon of electromagnetic radiation is directly proportional to its frequency.
This can be calculated using the formula E = hf, where E is the energy of the photon, h is Planck's constant (6.626 x 10⁻³⁴ J*s), and f is the frequency of the electromagnetic radiation. Plugging in the given values, we get:
E = (6.626 x 10⁻³⁴ J*s) * (7.3231548 x 10⁷ Hz)
= 4.85318e-19 J.
Therefore, the energy of the photon is 4.85318e-19 J.
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Draw the equivalent circuit of a sensor in which the open-circuit sensor voltage is proportional to the measurand. What are loading effects? How do we avoid them when we need to measure the Thévenin (i.e., open- circuit) sensor voltage?
The equivalent circuit of a sensor that produces an open-circuit sensor voltage proportional to the measurand can be represented as a voltage source in series with an internal resistance, as shown below:
lua
Copy code
+-----------------+
| |
V_sensor--+ |
| |
+-----------------+
Loading effects refer to the impact of the measuring instrument on the sensor's output. In other words, when the instrument is connected to the sensor, it creates a current path that can cause a voltage drop across the internal resistance of the sensor. This voltage drop can affect the accuracy of the sensor's output.
To avoid loading effects when measuring the Thévenin (i.e., open-circuit) sensor voltage, the circuitry used to measure the voltage should have a very high input impedance. This means that the instrument should draw very little current from the sensor, thereby minimizing any voltage drop across the internal resistance of the sensor. One way to achieve a high input impedance is by using an operational amplifier in a voltage follower configuration.
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Melissa was putting on her makeup when she accidentally ran into a stopped car at a red light, 11. 01 m in front of her. Melissa's 1,219 kg car was moving at 8. 133 m/s and came to a complete stop in 0. 3994 seconds. What is the magnitude of the force that stopped Melissa's car?
a
2. 970E4 N
b
1. 535E4 N
c
1. 934E4 N
d
4. 550E4 N
e
4. 295E4 N
f
3. 400E4 N
g
3. 821E4 N
h
2. 482E4 N
The required magnitude of the force that stopped Melissa's car is 118608.7 N.
What are 1st 2nd and 3rd laws of motion?According to the first law, unless a force acts on an object, it will not alter its motion. According to the second law, an object's force is determined by multiplying its mass by its acceleration. According to the third law, when two objects interact, they exert equal-sized and opposite-direction forces upon one another.
According to question:An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
Given,
speed=8.133 m/s
final velocity=0 (due to impact)
time=0.3994 seconds
distance=11.01m
Then,
S = ut + (at^2)/2
a = 2(s - ut)t^2
a = 97.3 m/s^2
So,
Force = ma
Force = 1219(97.3)
Force = 118608.7 N
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a car accelerates from 10.0m/s to 30.0m/s at a rate of 3.00 m/s^2. How far does the car travel while accelerating
The car travels a distance of 40.0 meters while accelerating.
To determine the distance traveled while accelerating, we can use the kinematic equation:
\[v_f2 = v_i2 + 2a \cdot d\]
Where:
\(v_f\) is the final velocity (30.0 m/s),
\(v_i\) is the initial velocity (10.0 m/s),
\(a\) is the acceleration (3.00 m/s\(2\)),
and \(d\) is the distance traveled while accelerating (which we need to find).
Rearranging the equation, we have:
\[d = \frac{{v_f2 - v2}}{{2a}}\]
Substituting the given values, we get:
\[d = \frac{{30.02 - 10.02}}{{2 \cdot 3.00}} = \frac{{900 - 100}}{{6.00}} = \frac{{800}}{{6.00}} = 40.0 \, \text{m}\]
Therefore, the car travels a distance of 40.0 meters while accelerating.
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How can you tell the difference between a colloid and a suspension?
Answer: Particles in a suspension are usually more than 1,000 nm, while those in a colloid range from 1-1,000 nm. Unlike those in a suspension, particles in a colloid do not separate when sitting still. ... Particles in a suspension can be seen by the naked eye, but those in a colloid must be viewed using a light microscope.
hope this helps:)
Explanation:
in the bohr model, what is the ratio of its kinetic energy to its potential energy?
The centrifugal force C = mv^2/r = kq^2/r^2 = P centripetal force. m is the electron mass, q are the proton and electron charges (opposites), and r is the Bohr radius.
Thus 1/2 mv^2/r = 1/2 kq^2/r^2 and KE = 1/2 mv^2 = 1/2 kq^2/r = 1/2 PE
Therefore KE/PE = 1/2, no matter what state the electron is in.
A cook had a jar containing a sweet food and a jar containing a sour food. The sweet food has a strong attraction between its molecules, and the sour food has a weak attraction between its molecules. At room temperature, both foods are liquids. The cook left both jars in a place where the same amount of energy was transferred into both substances. When she returned, one of the foods had changed phase while the other had not. Which food changed phase, and how did it change?
Answer:
The sweet food changed because the molecules were able to move fast enough to overcome the attraction between them with its molecules now moving away from each other.
Explanation:
We are told that the sweet food has a strong attraction between its molecules, and the sour food has a weak attraction between its molecules.
This means that the molecules in the sweet food would be moving at a faster rate than in the sour food because of the strong forces of attraction. Therefore, the molecules in the sweet food would be moving far away from each other hence the change of phase.
The sweet food changed since the molecules were capable to move fast i.e. sufficient to overcome the attraction between them with its molecules.
information regarding molecules:
The sweet food should contain the strong attraction between its molecules, and the sour food contains weak attraction between its molecules.This represent that the molecules in the sweet food would be moving at a faster rate as compared to the in the sour food because of the strong forces of attraction.Learn more about the molecure here: https://brainly.com/question/19922822?referrer=searchResults
Q7 Describe two types of atomic change that produce electromagnetic
waves.
a carnot engine operates between reservoirs at 500 k and 300k, discarding 1800 j of heat in each cycle. how much heat is supplied to the engine by the hot reservoir in each cycle? give your answer in j but do not include the units in the answer box.
The Carnot engine is 40% efficient.
It's far a super reversible thermodynamic manner that includes the subsequent 4 tactics, Isothermal growth, No different heating is more efficient than this one, as there may be no finite temperature distinction between the warmth supply and warmth receiver. Therefore, it's miles the most efficient reversible system.
A Carnot engine can be notion of to include a cylinder with adiabatic lateral partitions packed with a substance which can take in and supply warmness. The cylinder is closed by way of an adiabatic piston which could move out and deliver work. The cylinder can acquire paintings by means of shifting the piston inward.
The Carnot engine is a theoretical thermodynamic cycle proposed by means of Leonard Carnot. It estimates the maximum feasible performance that a heat engine all through the conversion manner of warmth into paintings and, conversely, operating among two reservoirs can own.
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Suppoe that a high-energy neutron i travelling at a peed of 18 million m/. Find it energy in MeV (million electron volt (eV))
The energy of the high energy neutron is 940.51 MeV.
Speed is nothing but the distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity with the SI unit meter/second.
We know that mass of the neutron m₀ = 939.6 MeV/c²
A high energy neutron is travelling at a speed of 18 million m/s.
Given that, v = 1.8 * 10⁷ m/s
The energy of neutron is calculated with the formula, m₀* c²/√(1 - v²/c²)
⇒ 939.6 * (3* 10⁸)²/√[1 - (1.8 * 10⁷)²/(3* 10⁸)²]
⇒ 940.51 MeV
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What is the separation in meters between two slits for which 617 nm orange light has its first maximum at an angle of 29. 8°?
The separation between the two slits, d is related to the wavelength, and angle using the formula below. Hence, the value of d is 1.22 x 10⁻⁶ m.
For ease of calculations we take 29.8° = 30°
Using the relation :
\(\frac{m * λ }{sin\theta}\)
where :
d = distance between the slits
θ = 30°
λ = wavelength of light = 617 nm = 6.17 x 10⁻⁷ m
m = 1
Substituting the values into the equation :
d = 1 x 6.17 x 10⁻⁷ / 0.5 = 0.00000122 = 1.22 x 10⁻⁶ m
Therefore, the seperation between the two slits is 1.22 x 10⁻⁶ m.
The double-slit experiment is a demonstration that light and matter can display characteristics of both classically defined waves and particles; moreover, it displays the fundamentally probabilistic nature of quantum mechanical phenomena.
This type of experiment was first performed, using light, by Thomas Young in 1802, as a demonstration of the wave behavior of light. At that time it was thought that light consisted of either waves or particles.
With the beginning of modern physics, about a hundred years later, it was realized that light could in fact show behavior characteristic of both waves and particles. Young's experiment with light was part of classical physics long before the development of quantum mechanics and the concept of wave–particle duality.
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A student is collecting data about the transfer of kinetic energy using a pitcher of lemonade. She uses the following procedure in one of the trials of her experiment:
Measure the temperature of the lemonade without ice.
Add 10 ice cubes to the pitcher.
Which step should be next in the procedure?
(1 point)
Set a timer and find out how long it takes for the lemonade to get cold.
Determine the mass of the lemonade with the ice.
Add more ice cubes to the lemonade.
Measure the temperature of the lemonade after the ice has melted.
Answer:
Explanation:
D is my answer
A study was conducted using two groups of 10 plants of the same species. During the study, the plants were placed in identical environmental conditions. The plants in one group were given a growth solution every 3 days. The heights of the plants in both groups were recorded at the beginning of the study and at the end of the 3-week period. The data showed that the plants given the growth solution grew faster than those not given the solution.
What is the dependent variable in this study?
ensure that the conditions is identical as those in the initial trial. the study's dependent variable
What is equivalent to the example?similar or identical in all respects: The only difference between the two vehicles is their licence plates. being identical; identical: We stayed in this exact same room last year.
Does a duplicate mean the same thing?Adjective. being identical to another; being duplicated from an original frequently. This entry already exists.
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the stars in elliptical galaxies generally move either 1) in irregular orbits in all directions or 2) together in a particular direction as they orbit. what is the general motion for the stars in an elliptical galaxy?
Stellar orbits in elliptical galaxies are random, as opposed to spiral galaxies, where all of the stars orbit the galaxy's core in the same way.
What direction do stars in elliptical galaxies migrate in?Stellar orbits in elliptical galaxies are random, as opposed to spiral galaxies, where all of the stars orbit the galaxy's core in the same way.The majority of elliptical galaxies' star motions are currently thought to be fundamentally random; the size of the anisotropy of the stellar motions, or how much random velocities vary in different directions, determines the form of these galaxies.Ellipsoidal galaxies are round or oval in shape, as their name suggests, and contain stars that are widely spaced out.To learn more about Elliptical galaxies refer to:
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An object of mass 2kg is thrown vertically downwards with an initial kinetic energy of 100J. What is the distance fallen by the object at the instant when its kinetic energy has doubled
The distance fallen by the object at the instant when its kinetic energy has doubled is 5.097m
The kinetic energy of an object is the energy possessed by the body by virtue of its motion.
The gravitational potential energy (energy due to the virtue of its position) of a body is being converted to Kinetic energy once an object falls.
Using the law of conservation of energy according to the equation:
Kinectic Energy = Potential Energy
Since PE = mgh
KE = PE = mgh
Given the following parameters
KE = 100J
m = 2kg
g = 9.81m/s²
Required
Height h
Substitute the required values into the formula
100 = 2(9.81)h
h = 100/19.62
h = 5.097m
Hence the distance fallen by the object at the instant when its kinetic energy has doubled is 5.097m
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i) Show that total energy of the body at points A, B and C during the fall is same. ii) Find the distance from A to B and final velocity of the ball just reach before C.
mass =5 kg, total height (h)= 100m
i) The total energy of the body at points A, B and C during the fall is the same because the law of conservation of energy.
ii) distance from A to B and final velocity is 44.3 m/s.
How to determine distance and velocity?i) The total energy of the body at points A, B and C during the fall is the same because the law of conservation of energy states that energy can neither be created nor destroyed, only transferred or transformed. In this case, the potential energy of the body at point A is converted into kinetic energy as it falls to point B. At point B, all of the potential energy has been converted into kinetic energy, and the body has its maximum velocity. As the body continues to fall from point B to point C, its kinetic energy is converted back into potential energy. At point C, all of the kinetic energy has been converted back into potential energy, and the body has its original height.
ii) The distance from A to B can be found using the equation d = √2gh
, where d is the distance, g is the acceleration due to gravity, and h is the height. In this case, g = 9.8 m/s² and h = 100m, so d = √(2⋅9.8⋅100) = 44.3m.
The final velocity of the ball just before it reaches point C can be found using the equation v = √2gh
, where v is the velocity, g is the acceleration due to gravity, and h is the height. In this case, g = 9.8 m/s² and h = 100m, so v = √(2⋅9.8⋅100) = 44.3 m/s
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Advanced Wireless Services (AWS) is a wireless telecommunications spectrum band used for mobile voice and data services, video, and messaging. The AWS band uses frequencies in several segments: from 1695 to 2200 MHz. a) Determine the corresponding range of wavelengths used by the AWS mobile devices. b) To what region/band of electromagnetic spectrum does the range belong
Given data
*The given frequency is
\(f_1_{}=1695\text{ MHz}=1695\times10^6\text{ Hz}\)*The another given frequency is
\(f_2=2200\text{ MHz=}2200\times10^6\text{ Hz}\)*The given speed of light is c = 3.0 × 10^8 m/s
(a)
The formula for the wavelength is given as
\(\lambda_1=\frac{c}{f_1}\)Substitute the known values in the above expression as
\(\begin{gathered} \lambda_1=\frac{(3\times10^8)}{(1695\times10^6)^{}} \\ =0.176\text{ m} \end{gathered}\)The another wavelength for the another frequency is calculated as
\(\begin{gathered} \lambda_2=\frac{c}{f_2} \\ =\frac{(3.0\times10^8)}{(2200\times10^6)} \\ =0.136\text{ m} \end{gathered}\)(b)
Radio spectrum is an electromagnetic spectrum where the frequency range belongs of wireless telecommunication.
Un manómetro se usa para medir la presión en un recipiente. El fluido que se emplea tiene una densidad relativa de . Y la altura de la columna del manómetro es de . Si la presión atmosférica local es de , determine la presión absoluta dentro del recipiente.
Answer:
P = \(P_{atm} + \rho \ g \ h\)
Explanation:
For this exercise we use that the pressure at a given level is the same, so we set a level on both sides of the pressure gauge, just the point where the liquid is on the system side, with a pressure (P)
P = \(P_{atm} + \rho \ g \ h\)
where \(P_{atm}\) is the atmospheric pressure in pascals, ρ the density of the liquid, g is related to gravity and h the height of the liquid from the marked reference.
Ken received a 66 on his first math exam, which counted for 20% of his final grade; he now believes that he won't be able to pass the class. His conclusion best illustrates a pessimistic outlook. the fight-or-flight response. problem-focused coping. relative deprivation.
Answer:
His conclusion best illustrates a pessimistic outlook.
Explanation:
As seen in the question above, Ken got 20% of his final grade in the first test he did for this class, that is, there will be other tests that can provide him to reach the grade needed to pass the class. However, even if there are possibilities, he believes that he will not pass the class, he does not have a positive and optimistic view of his future in this class and is sure that he will fail. This negative view of the future is an example of a pessimistic outlook.
Help! How do you find the Eccentricity??
Explanation:
The formula to determine the eccentricity of an ellipse is the distance between foci divided by the length of the major axis
using the generalized mass m* and generalized stiffness k*, and the appropriate shape function, determine the fundamental period t. in g
The mass matrix M (p) describes the generalized mass and inertia of the system as a function of the vehicle pose.
What is generalized mass?The term "generalized mass" usually refers to a representation of the "physical" mass matrix that has been transformed from "physical" (also known as "nodal" in FE) coordinates to generalised (also known as "modal") coordinates.
The eigenvalue analysis yields eigenvalues, which are related to the system's natural frequencies (2*pi*f2), and eigenvectors, which are the mode shapes associated with each of those frequencies. When all of these eigenvectors are combined into one matrix, with each column of the matrix representing one eigenvector, we have the system's "modal matrix." You can scale each column however you want. The columns are frequently scaled so that each has a maximum value of 1.
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Sketch on the axes on the right the force exerted by a tennis racket on a ball and the force exerted by the ball Force of on the racket during a collision. Ex- racket 0 on ball plain the shapes of your graphs. Force of ball on 0 racket Time Name Aind Picture Paint dragim agraph at some content might be missing or displayed in tele 2) A tennis player hits a ball with her racket Compare the force cented by the racket on the ball to that exerted by the ball on the racher during the colision between the ball and racket is one force larger than the other or are they in magnitude to each other? 3) A bowing ball roils down anley and his apn Compare the force rated by the ball on the pin to the force exerted by the pin on the ball during the collision is one force larger than the other or are they equal in magnade to each other? I 4) An automobile of mass 1500 imoving at 250 ml codes with a mass 4500 kg trest. The bumbers of the two vehicle or during the crash Compare the force exerted by the car on the way the truck on the car during the collision is one for the are they equal in magnitude to each other
To sketch the force exerted by a tennis racket on a ball and the force exerted by the ball on the racket during a collision, we need to consider the shapes of the graphs. The magnitude of the forces will depend on factors such as the speed and masses of the vehicles.
The force exerted by the racket on the ball will have a sharp spike initially when the racket makes contact with the ball, and then it will gradually decrease as the ball moves away from the racket. On the other hand, the force exerted by the ball on the racket will have a smooth curve that gradually increases as the ball approaches the racket, reaches a peak at the point of impact, and then gradually decreases as the ball bounces away from the racket. The magnitude of the forces will depend on factors such as the speed and mass of the ball and racket.
2) When a tennis player hits a ball with her racket, the force exerted by the racket on the ball is equal in magnitude to the force exerted by the ball on the racket during the collision. This is due to Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. Therefore, the force of the ball on the racket is equal and opposite to the force of the racket on the ball.
3) When a bowling ball rolls down an alley and hits a pin, the force exerted by the ball on the pin is equal in magnitude to the force exerted by the pin on the ball during the collision. This is also due to Newton's Third Law of Motion. The forces will depend on the masses and speeds of the ball and pin.
4) In a collision between an automobile of mass 1500 kg moving at 250 ml codes and a truck of mass 4500 kg at rest, the force exerted by the car on the truck during the collision is equal in magnitude to the force exerted by the truck on the car. This is again due to Newton's Third Law of Motion.
1) When sketching the force exerted by a tennis racket on a ball and the force exerted by the ball on the racket during a collision, both forces will have the same magnitude but opposite directions. According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. Therefore, the shapes of your graphs will be mirror images of each other.
2) Comparing the force exerted by the racket on the ball to that exerted by the ball on the racket during the collision, both forces are equal in magnitude but opposite in direction, as per Newton's Third Law of Motion.
3) When a bowling ball rolls down an alley and hits a pin, the force exerted by the ball on the pin is equal in magnitude but opposite in direction to the force exerted by the pin on the ball during the collision, as per Newton's Third Law of Motion.
4) In the case of an automobile collision involving an automobile of mass 1500 kg moving at 250 ml (assuming you meant 250 m/s) and a mass 4500 kg truck, both forces, the force exerted by the car on the truck and the force exerted by the truck on the car, are equal in magnitude but opposite in direction during the collision. This is in accordance with Newton's Third Law of Motion.
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We showed in class (Lect. 8) that the average energy of solid (approximated as a collection of N 3-D oscillators) is given by
The average energy of solid (approximated as a collection of N 3-D oscillators) is given by :
U = 3N<E> = (3Nε) / (e^(ikT) - 1)
There are N distinct particles and 3N various modes in three dimensions, where the three possible polarizations account for the factor of 3. Since they must be indistinguishable, you must symmetrize with respect to the various particles, which is why you only have a factor of N! on the bottom. However, you have a factor of 3N because there are 3N modes.
What is a harmonic oscillator?The quantum-mechanical equivalent of the classical harmonic oscillator is the quantum harmonic oscillator. One of the most crucial model systems in quantum mechanics is an arbitrary smooth potential because it may frequently be represented as a harmonic potential at a stable equilibrium point. It is also one of the few quantum-mechanical systems that has a precise, analytical solution.
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.How many electrons are in 0.4 C?
Answer:
There are 2.5 x 10¹⁸ electrons in 0.4 C.
Explanation:
The charge of one electron = 1.602 x 10⁻¹⁹ C
Therefore, the number of electrons in 0.4 C is calculated as follows;
1.602 x 10⁻¹⁹ C -------------> 1 electron
0.4 C --------------------------> x
x = (0.4 ) / (1.602 x 10⁻¹⁹)
x = 2.5 x 10¹⁸ electrons
Therefore, there are 2.5 x 10¹⁸ electrons in 0.4 C.
Determine the present value of the following single amounts (FV of $1, PV of $1, FVA of $1, PVA of $1, FVAD of $1 and PVAD of $1)
FV= $20,000 I=7% N=10 PV= ?
FV= $14,000 I=8% N=12 PV= ?
FV= $25,000 I=12% N=20 PV= ?
FV= $40,000 I=10% N=8 PV= ?
The present value of the following single amounts are as follows;
PV for FV = $20,000, I =7%, N =10 years is $10,155.84
PV for FV = $14,000, I =8%, N =12 years is $4,489.92
PV for FV = $25,000, I =12%, N =20 years is $2,590.11
PV for FV = $40,000, I =10%, N =8 years is $18,520.89.
Future value (FV) =$20,000,
Interest rate (I) =7%,Time (n) = 10 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 20000 / (1 + 0.07)10PV = 20000 / 1.96715PV = $10,155.84
Future value (FV) =$14,000,
Interest rate (I) =8%,
Time (n) = 12 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 14000 / (1 + 0.08)12PV = 14000 / 3.12159PV = $4,489.92
Future value (FV) =$25,000,
Interest rate (I) =12%,Time (n) = 20 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 25000 / (1 + 0.12)20PV = 25000 / 9.64632PV = $2,590.11
Future value (FV) =$40,000,Interest rate (I) =10%,Time (n) = 8 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 40000 / (1 + 0.1)8PV = 40000 / 2.15893PV = $18,520.89
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Two balls are rolling using the same force. Which law explains why the bowling ball will roll a shorter distance than a soccer ball ?
1. Newton's 1st law
2. Newton's 2nd law
3. Newton's 3rd law
Answer:
newton's 2nd law
Explanation:
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
A golf ball rolls off a horizontal cliff with an initial speed of 10.2 m/s. The ball falls a vertical distance of 12.3 m into a lake below. How much time does the ball spend in the air? (b) What is the speed v of the ball just before it strikes the water? (a) Number Units (b) Number Units
The golf ball spends approximately 1.46 seconds in the air before hitting the water. Just before striking the water, its speed is approximately 18.84 m/s.
We can solve this problem by analyzing the motion of the golf ball in the vertical and horizontal directions separately. In the vertical direction, the ball falls a distance of 12.3 m due to gravity. We can use the equation of motion for vertical motion, which is given by:
\(h = (1/2)gt^2\)
where h is the vertical distance, g is the acceleration due to gravity (approximately 9.8 \(m/s^2\)), and t is the time. Rearranging the equation, we can solve for t:
\(t = \sqrt(2h / g) = \sqrt(2 * 12.3 / 9.8)\) ≈ 1.46 s
Therefore, the ball spends approximately 1.46 seconds in the air.
In the horizontal direction, the ball rolls off the cliff with an initial speed of 10.2 m/s. Since there are no horizontal forces acting on the ball, its horizontal speed remains constant throughout the motion. Therefore, the horizontal speed just before the ball strikes the water is also 10.2 m/s.
Combining the vertical and horizontal components of motion, we can find the resultant velocity just before the ball hits the water using the Pythagorean theorem:
\(v = \sqrt(v_{horizontal}^2 + v_{vertical}^2) = \sqrt(10.2^2 + 0)\) ≈ 10.2 m/s
Therefore, the speed of the ball just before it strikes the water is approximately 18.84 m/s.
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Which term is defined as a complete path for current flow without any kind of break?
Term which is used to define a complete path for current flow without any kind of break is closed circuit.
What is a circuit?A circuit is the pathway of current. Circuits have two ends. A positive terminal and a negative terminal. The electrons are moving from negative terminal to the positive terminal.
The current flow in the opposite direction of electrons thus, from positive terminal to the negative terminal. There are both closed circuits and open circuits.
In an open circuits the current is zero. In a closed circuit, there is a net current flow through the circuit. The circuits can be made open or closed with the devices called switches.
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What do these two changes have in common? making paper from wood
photosynthesis
Select all that apply.
Both are chemical changes.
Both are changes of state.
Both conserve mass.
Both are caused by heating.
Answer:
Both are chemical change as the new product is formed with new characteristics and can't be brought back to previous form.
A plane takes off at an angle of 30 degrees at a speed of 150 km/h. Determine the horizontal
and vertical components of this velocity vector.
Answer:
Horizontal Component = 129.9 km/h
Vertical Component = 75 km/h
Explanation:
When a vector is resolved on the x-axis and the y-axis, the components so formed are called its rectangular components. The component along y-axis is called the vertical component and the component along x-axis is called horizontal component. These components can be given by following formulae:
Horizontal Component = v Cos θ
Vertical Component = v Sin θ
where,
v = velocity = 150 km/h
θ = angle = 30°
Therefore,
Horizontal Component = (150 km/h)(Cos 30°)
Horizontal Component = 129.9 km/h
Vertical Component = (150 km/h)(Sin 30°)
Vertical Component = 75 km/h
A measuring cylinder contains 80 cm3 of a certain liquid. The liquid is poured
into an empty beaker of mass 48 g. The total mass of the beaker and the liquid
was found to be 136 g.
(a) Calculate the mass of the liquid in grams.
(b)Calculate the density of the liquid in gcm-3
Answer:
1.5 g/cm
3
Let d be the density of fluid.
So , Initial reading of balance, F
1
=30dg N
After the level reaches 50cm
3
Final reading of balance , F
2
=50dg N
Given that difference between final and initial reading is 30g
i.e, F
2
−F
1
=30 g
⟹50dg−30dg=30g
⟹20dg=30g
⟹d=
20g
30g
⟹d=1.5g/cm
3
So, density of fluid is 1.5g/cm
3