Describe the ways the reading addresses how some people use ""uncertainty"" as a way to undermine science:
Answers
The reading addresses how some people use "uncertainty" as a way to undermine science: by pointing out that these individuals often exploit the inherent limitations and ambiguities present in scientific research.
They tend to focus on the fact that scientific findings are often provisional, and conclusions can change with the introduction of new evidence or advancements in methodologies. By emphasizing the uncertainty aspect, they attempt to discredit or cast doubt on the overall credibility of scientific results.
Furthermore, these individuals may cherry-pick data or studies that support their preconceived beliefs, while ignoring the broader consensus within the scientific community. This selective presentation of evidence contributes to misinformation and public confusion about scientific issues, such as climate change or vaccinations.
In some cases, those who use uncertainty to undermine science may have ulterior motives, such as protecting vested interests or promoting a specific political or ideological agenda. By sowing doubt and mistrust in scientific findings, they can manipulate public opinion and obstruct the development or implementation of evidence-based policies.
To counteract these attempts to undermine science, it is essential for the scientific community and the public to recognize and appreciate the inherent uncertainties within the scientific process.
By fostering critical thinking, encouraging open and transparent communication, and supporting continued research and education, we can help build resilience against misinformation and promote a better understanding of the role of uncertainty in scientific progress.
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Related Questions
When steam condenses
a. it changes from the gas phase to the liquid phase.
b. it gives off heat.
c. molecules move closer together.
d. all of the above occur.
Answers
Answer:
all of the above?
Explanation:
I think that is
A 0.58 kg mass is moving horizontally with a speed of 6.0 m/s when it strikes a vertical wall. The mass rebounds with a speed of 4.0 m/s. What is the magnitude of the change in linear momentum of the mass
Answers
Answer:
\(5.8\; {\rm kg\cdot m \cdot s^{-1}}\).
Explanation:
If the mass of an object is \(m\) and the velocity of that object is \(v\), the linear momentum of that object would be \(m\, v\).
Assume that the initial velocity of the mass is positive (\(6.0\; {\rm m\cdot s^{-1}}\).) However, the direction of the velocity is reversed after the impact. Thus, the sign of the new velocity of the object would be negative- the opposite of that of the initial velocity. The new velocity would be \((-4.0\; {\rm m\cdot s^{-1}})\).
Thus, the change in the velocity of the mass would be:
\(\begin{aligned}& (\text{Change in Velocity}) \\ =\; & (\text{Final Velocity}) - (\text{Initial Velocity}) \\ =\; & (-4.0\; {\rm m\cdot s^{-1}}) - (6.0\; {\rm m\cdot s^{-1}}) \\ =\; & (-10\; {\rm m\cdot s^{-1})\end{aligned}\).
The change in the linear momentum of the mass would be:
\(\begin{aligned} & \text{change in momentum} \\ =\; & (\text{mass}) \times (\text{change in velocity}) \\ =\; & 0.58\; {\rm kg} \times (-10\; {\rm m\cdot s^{-1}}) \\ =\; & (-5.8\; {\rm kg \cdot m \cdot s^{-1}})\end{aligned}\).
Thus, the magnitude of the change of the linear momentum would be \(5.8\; {\rm kg \cdot m \cdot s^{-1}}\).
strike two tuning forks, one with frequency of 340 hz, the other 342 hz. what will we hear
Answers
You will hear a phenomenon called beating, with a beat frequency of 2 Hz, resulting in alternating constructive and destructive interference between the two tuning forks.
When you strike two tuning forks with slightly different frequencies (340 Hz and 342 Hz), the sound waves they produce will interfere with each other. This interference creates a pattern of alternating constructive and destructive interference.
Constructive interference occurs when the waves are in phase, making the sound louder, while destructive interference occurs when they are out of phase, making it quieter. The difference in frequencies (342 Hz - 340 Hz = 2 Hz) determines the beat frequency, which is the rate at which the loudness fluctuates. In this case, you will hear beats occurring 2 times per second, resulting in a rhythmic pulsing sound.
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If the collision between the balls is perfectly inelastic, the vertical height h reached by the ball on the string will be
Answers
If the collision between the balls is perfectly inelastic, the vertical height h reached by the ball on the string will be equal to the initial height from which the ball was dropped, as the explanation below will show. main answerWhen two balls, ball 1 and ball 2, collide, momentum is conserved, but kinetic energy is not conserved.
This type of collision is called a perfectly inelastic collision. During a perfectly inelastic collision, the colliding objects stick together and move as one object after the collision. Here, we have a ball that is dropped onto another ball, and the two balls stick together after the collision. Therefore, this is a case of a perfectly inelastic collision. Initially, the first ball is at a height h above the second ball, and it is dropped. It falls and collides with the second ball, which is at rest. After the collision, the two balls stick together, and they move as one object.
The total energy of the system before the collision is given by the potential energy of the first ball: Ei = mgh. After the collision, the total energy of the system is given by the kinetic energy of the two balls:Ef = 1/2 (m1 + m2) v2, where v is the velocity of the two balls after the collision.Since momentum is conserved, we can write: m1 * vi = (m1 + m2) * vAfter the collision, the two balls move up and reach a maximum height, h', above the initial height. This height is given by: h' = Ef / (m1 + m2) * g= (1/2 (m1 + m2) v2) / (m1 + m2) * g= v2 / 2gSince energy is not conserved in a perfectly inelastic collision, the total energy after the collision is less than the total energy before the collision. Therefore, the maximum height reached by the two balls after the collision is less than the initial height of the first ball. Thus, if the collision between the balls is perfectly inelastic, the vertical height h reached by the ball on the string will be equal to the initial height from which the ball was dropped.
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a model rocket of mass 0.5\,\mathrm{kg}0.5kg reaches a velocity of 70 \,\mathrm{m/s}70m/s over an interval of 10 seconds after launching from rest. what is the average force applied by the rocket engine to the rocket?
Answers
3.5 Newton is the average force applied by the rocket engine to the rocket.
we have given data.
mass m = 0.5 kg
initial speed u = 0
final speed v = 70 m/s
time t = 10 sec
acceleration a = v-u/t
a = 70-0/10 = 7 m/s^2
from the relation
f = ma
f = 0.5×7 = 3.5 N
The direction of the applied force determines the change in a body's linear momentum, which changes at a rate that is directly proportional to the force.
The SI unit of force is the Newton. It is described as the force that propels a mass of 1 kilogram at an acceleration of 1 meter per second squared. Its sign is the capital letter N, which is represented as 1N=1 kg m s^2. 1N=1 kilogram m s^−2.
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Select the correct answer.
Which outcome does the big crunch scenario predict?
A. the matter in the universe will slow the expansion to the pointwhere it would finally come to a halt and then start to retract
B. the universe will keep expanding and growing ever larger and galaxies will grow farther apart
C. the universe will finally extinguish itself with a violent expansion similar to the one with which it began
D. the gravity in the universe will grow very weak, resulting in the planets drifting into stars
Answers
Answer:
A. the matter in the universe will slow the expansion to the point where it would finally come to a halt and then start to retract
Explanation:
Answer:
the matter in the universe will slow the expansion to the point where it would finally come to a halt and then start to retract
Explanation:
Plato/Edmentum
A 5 kg object oscillates with simple harmonic motion. Its position as a function of time varies according to the following equation x(t) = 2 sin(( π/2)t + ( π/6))
At what time (in seconds) after t = 0 seconds is the kinetic energy first at a maximum?
Answers
The kinetic energy is first at a maximum after approximately 3.67 seconds after t=0.
To determine the time when the kinetic energy is first at a maximum, we need to find the time at which the velocity of the object is at a maximum. The kinetic energy of an object undergoing simple harmonic motion is maximum when the velocity is maximum.
The equation for velocity as a function of time in simple harmonic motion is given by:
v(t) = Aω cos(ωt + φ)
where A is the amplitude, ω is the angular frequency, t is time, and φ is the phase constant.
In this case, the equation for position is x(t) = 2 sin((π/2)t + (π/6)), which is in the form x(t) = A sin(ωt + φ).
Comparing the two equations, we can see that ω = π/2.
The velocity equation becomes:
v(t) = (π/2)A cos((π/2)t + φ)
To find the time at which the velocity is maximum, we need to find when the cosine term is at its maximum value of 1. This occurs when (π/2)t + φ = 0 or (π/2)t + φ = 2π.
Solving for t, we get:
(π/2)t = -φ or (π/2)t = 2π - φ
t = (-2φ/π) or t = (4π - 2φ)/π
Since the phase constant φ in the given equation is π/6, we substitute this value into the equations:
t = (-2(π/6)/π) or t = (4π - 2(π/6))/π
t = -1/3 or t = 11/3
Therefore, the kinetic energy is first at a maximum at t = 11/3 seconds.
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What net force is required to accelerate a car at a rate of 3m/s^2 if the car has a mass of 2,000 kg?
Answers
Answer:
6000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 2000 × 3
We have the final answer as
6000 NHope this helps you
which two elements define a story's setting?
geographical location
character description
weather conditions
plot structure
dialogue and action
Reset
Next
Answers
Answer:
Geographical location, and time and weather conditions
Answer:
Georgraphical location and weather conditions
Explanation:
Setting is where the story takes place so the location would be vital and same with weather conditions because it determines what the character(s) do
If a point charge is located at the center of a cylinder and the electric flux leaving one end of the cylinder is 20% of the total flux leaving the cylinder, what portion of the flux leaves the curved surface of the cylinder
Answers
The portion of the flux leaves the curved surface of the cylinder is 60%.
What are electrons?The electrons are the spinning objects around the nucleus of the atom of the element in an orbit.
If a point charge is located at the center of a cylinder and the electric flux leaving one end of the cylinder is 20% of the total flux leaving the cylinder.
If 20% of the flux leave from one end, then another 20% will leave from another end.
So, the net flux through curved surface is
100 -20 -20 = 60%
Thus, the total flux leaves the curved surface of the cylinder is 60%
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An astronaut's training centrifuge has a radius of 4.0m. If it goes round once every 2.5s, calculate the velocity of the end of the centrifuge arm (4.0m from the pivot).
Answers
Answer: 10.048m/s
Explanation:
We know that the radius is r = 4.0m
And for rotating things, the tangential velocity (or the velocity of the end of the centrifuge arm) can be calculated as:
v = r*w
The period is T = 2.5s,
This means that if sin(w*t) describes this situation, we have that:
sin(w*t) = sin(w*(t + T))
and we know that:
sin(w*0) = 0
sin(w*(0 + T)) = Sin(w*T) = 0
this means that w*T = 2*pi
w = 2*pi/T = 2*pi/2.5s = (2*3.14)/2.5 s = 2.512 hz
Then the velocity can be calculated as
v = r*w = 4.0m*2.512hz = 10.048m/s
NEED HELP!!! IF YOU ANSWER ALL QUESTIONS I WILL GIVE YOU BRAINEST!!!!! 20 POINTS!!!!
1. Imagine that you design running shoes for a living. Which biometric would be most useful?
A.
the average weight of a runner
B.
the number of runners in a popular urban area
C.
the points of impact when the foot hits the ground
D.
the distance that beginning runners attempt to finish
2. Mike is studying the differences between the body mechanics of swimmers in pools versus open water. What is his focus on?
A.
statics
B.
dualism
C.
statistics
D.
dynamics
3. What is the potential hazard of failing to use equipment correctly at the gym?
A.
It is poor gym etiquette.
B.
It can cause injuries or pulled muscles.
C.
Poor exercise habits can actually cause stress.
D.
The exercise will not release endorphins if you do it wrong.
4. Ira is concerned about his posture. He tests it by seeing how long he can hold good posture and finds that he feels the most discomfort in his back. What does that suggest that he needs to do?
A.
Keep a neutral spine.
B.
Place his hands on his hips.
C.
Arc his back when he walks.
D.
Tuck his chin close to his chest.
PLEASE NO LINKS
Answers
Answer:
1. i would think C
2. D
3. B
4.A
Explanation:
Answer:
1-C
2-D
3-B
4-A
Got it right on the post-test
Which of the following best describes the use of a non-renewable resource? Nuclear energy heats water into steam that turns the turbines of a power plant. Water falls through openings in a dam turning turbine blades that generate electricity. Wind turbines gather energy from the wind and convert it into electrical energy. The electronic signs along the highway are run by solar power.
Answers
Nuclear energy ... non-renewable. It uses up the Uranium, and then we have to dig more Uranium out of the ground.
Water falling ... renewable kinetic energy, as soon as the sun lifts the water back up into the sky, and then it falls intk the lake again, and runs through the turbines again.
Wind turbines ... renewable kinetic energy, as soon as the sun heats the world unevenly again, and winds blow again.
Electronic signs run by solar power ... the solar power shines down on us, and will continue doing that for a few more billions of years, whether we use it or not. So we don't use up the sun by grabbing some of that energy.
Answer:
I just took the test and its A
Explanation:
Nuclear energy heats water into steam that turns the turbines of a power plant.
A red plastic buggy car can cover 60cm in 3 seconds. A little blue plastic buggy car can cover 240cm in 8 seconds. The two buggies are placed at the same starting line, pointed in the same direction at the same time. Find the velocity of each buggy.
Answers
ANSWER
\(\begin{gathered} \operatorname{Re}d=0.2m\/s \\ Blue=0.3m\/s \end{gathered}\)EXPLANATION
The velocity of a body is given by:
\(v=\frac{d}{t}\)where d = displacement
t = time traveled
The red plastic buggy covers 60 cm (0.6 m) in 3 seconds. Therefore, its velocity is:
\(\begin{gathered} v=\frac{0.6}{3} \\ v=0.2m\/s \end{gathered}\)The little blue plastic buggy covers 240 cm (2.4 m) in 8 seconds. Therefore, its velocity is:
\(\begin{gathered} v=\frac{2.4}{8} \\ v=0.3m\/s \end{gathered}\)Suggest a form of renewable energy that could be used to power an electric ticket machine that only needs to work during daylight hours.
Answers
Answer:
solar panel or wind turbine
Explanation:
Because solar panel gives energy to electricity by sun and wind turbine gives energy through wind and both are renewable
Renewable energy that could be used to power an electric ticket machine that only needs to work during daylight hours is solar energy.
What is solar energy?Solar energy is the term for solar radiation that can create heat, trigger chemical reactions, or create electricity. The total solar energy incident on Earth is far greater than the global energy needs at the moment and in the future. This highly distributed source has the ability to meet all future energy demands if properly exploited.
Due to its limitless supply and lack of pollution, solar energy is predicted to become a more appealing renewable energy source in the twenty-first century than the finite fossil fuels coal, petroleum, and natural gas.
Although sunlight is by far the most potent energy source that Earth receives from the Sun, its intensity at the surface of the planet is actually rather modest.
This is primarily due to the massive radial radiation propagating from the far-off Sun. Earth's atmosphere and clouds, which absorb or scatter as much as 54% of the incoming sunlight, cause a comparatively small additional loss.
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A car accelerates uniformly in a straight
line from rest at the rate of 3.3 m/s^2
What is the speed of the car after it has
traveled 60 m?
h
Answer in units of m/s.
how Long does it take the car to travel 60m?
answer in units of s
Answers
Answer: see below
Explanation:
The intial speed is u=0\(\frac{m}{s}\)
The acceleration is a= 3.3\(\frac{m}{s}^2\)
The distance is s=60m
Apply the equation of motion
\(v^{2}\)=\(u^{2}\)+2as
So,
\(v^{2}\)=0+2*3.3*60=396
v=\(\sqrt{396}\) = 19.89 m/s ≈20 m/s
Applying the equation of motion
v=u+at
t= \(\frac{v-u}{a}\) =\(\frac{19.89-0}{3.3}\) = 6.02seconds
The deflection produced by the Coriolis force is caused by O the Earth's rotation on its axis. O differing pressure gradients. O air temperature differences. O the uneven heating of Earth's surface. O friction caused by gravitational force.
Answers
The Planet on its axis often contributes to the deflection created by the Coriolis force.
Coriolis force: what is it?Moving objects in a reference point that rotates relative to an inertial frame are affected by an imagined or inertial force known as the Coriolis force. the force acting left of a object . an object in a frame of reference rotating in a clockwise direction.
Rotation: Rotation, often known as spin, is the cyclical motion of an object about a fundamental axis.
A two-dimensional rotating object can only have one possible central axis.
Such things have an axis that may rotate either counterclockwise or clockwise.
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Why does air move from solid land towards water during the night?
A-Solid ground cools faster at night while water remains heat longer, warming the air above the water.
B- The ground retains the heat from the sun longer than the water.
C- The dry air over the land is heavier than the air over the water the contains more water vapor
D- gravity moves the air towards the water because water is lower than the land
Answers
Answer:
A
Explanation:
This is to do with convection currents :)
Hope this helps!
PLEASE HELP 20 POINTS
A car of mass 700 kg and moving at a speed of 30 m/s collides with a stationary truck of mass 1400 kg, and the two vehicles lock together on impact. The combined velocity of the car and truck after the collision is m/s.
Answers
10m/s
Explanation:
(m1)(v1)+(m2)(v2)= (m1+m2)(v[final])
(700)(30)+(1400)(0)= (700)(v)+(1400)(v)
21000= 2100v
v=10m/s
A boy rubs two balloons against his sweater. One balloon acquires a charge of 3.0 E -6 C. The other balloon acquires a charge of 2.5 E -7 C. If the balloons are positioned 1 cm apart, what is the electrical force between them?
Answers
Answer:
67.5 N
Explanation:
From the question given above, the following data were obtained:
Charge 1 (q₁) = 3.0×10¯⁶ C
Charge 2 (q₂) = 2.5×10¯⁷ C
Distance apart (r) = 1 cm
Force (F) =?
Next, we shall convert 1 cm to m. This can be obtained as follow:
100 cm = 1 m
Therefore,
1 cm = 1 cm × 1 m / 100 cm
1 cm = 0.01 m
Thus, 1 cm is equivalent 0.01 m.
Finally, we shall determine the electrical force between the two points charges as follow:
Charge 1 (q₁) = 3.0×10¯⁶ C
Charge 2 (q₂) = 2.5×10¯⁷ C
Distance apart (r) = 0.01 m
Electrical constant (K) = 9×10⁹ Nm²C¯²
Force (F) =?
F = Kq₁q₂ / r²
F = 9×10⁹ × 3.0×10¯⁶ × 2.5×10¯⁷ / (0.01)²
F = 0.00675 / 0.0001
F = 67.5 N
Therefore, the electrical force between the two points charges is 67.5 N
a stroboscopic photo of a club hitting a golf ball, was made by Harold Edgerton in 1993. the ball was initially at rest, and the club was shown to be in contact with the ball for about 0.0020 s. Also, the ball was found to end up with a speed of 2.0x10^2 feet per second. Assuming that the golf ball had a mass of 55 g, find the average force exerted by the club on the ball
Answers
The average force exerted by the club on the ball is 838,400 N. Force can be characterized by its magnitude, direction, and point of application.
What is a force ?It can be a push or pull, and it can cause an object to start moving, stop moving, or change its direction of motion.
Force is indeed a physical factor that alters or has the potential to alter an object's state at rest or motion as well as its shape. Newton is the SI unit of force.
Finally, the average force exerted by the club on the ball is:
F = I / t = (1676.8 N·s) / (0.0020 s) = 838,400 N
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In the united states a standard letter sized piece of paper is 8.5 inches wide by 11 inches long. The international standard for a letter sized piece of paper is different. The international standard based on SI units:21.0cm wide by 29.7 cm long
Answers
This question is incomplete
Complete Question
In the United States, a standard letter-sized piece of paper is 8.5 inches wide by 11 inches long. The international standard for a letter-sized piece of paper is different. The international standard is based on SI units: 21.0 cm wide by 29.7 cm long.
a. Convert 21.0 cm to inches. Show your dimensional analysis setup.
b. Convert 29.7 cm to inches. Show your dimensional analysis setup.
c. State the dimensions, in inches, of the international standard for a letter-sized piece of paper.
d. Which piece of paper is longer: a U.S. letter-sized piece of paper, or an international letter-sized piece of paper?
Answer:
a) 8.267721 inches ≈ 8.3 inches
b) 11.6929197 inches ≈ 11.7 inches
c) It's dimensions in inches for the international standard for letter - sized for paper = 8.3 wide inches by 11.7 inches long
d) The International standard letter - sized paper is longer.
Explanation:
a. Convert 21.0 cm to inches. Show your dimensional analysis setup.
1 cm = 0.393701inch
21 cm =
Cross Multiply
21 cm × 0.393701inch/ 1 cm
= 8.267721 inches
Approximately 8.3 inches
b. Convert 29.7 cm to inches. Show your dimensional analysis setup.
1 cm = 0.393701inch
29.7 cm =
Cross Multiply
29.7 × 0.393701 inch/ 1 cm
= 11.6929197 inches
Approximately 11.7 inches
c. State the dimensions, in inches, of the international standard for a letter-sized piece of paper.
The international standard for a letter-sized has dimensions 21.0 cm wide by 29.7 cm long.
Where
21.0cm = 8.267721 inches
≈ 8.3 inches
29.7cm = 11.6929197 inches
≈ 11.7 inches
Hence, it's dimensions in inches = 8.3 inches by 11.7 inches.
d. Which piece of paper is longer: a U.S. letter-sized piece of paper, or an international letter-sized piece of paper?
U.S letter - sized paper = 8.5 inches wide by 11 inches long
International standard letter- sized paper = 8.3 wide inches by 11.7 inches long.
Hence, the International standard letter - sized paper is longer.
A proton moves at 2.50 x 10^6 m/s horizontally at a right angle to a magnetic field. What is the strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally
Answers
The strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally is 0.0414 T.
Understanding Magnetic FieldTo balance the weight of the proton and keep it moving horizontally, we need to apply a magnetic field with a strength equal to the gravitational force acting on the proton.
The force experienced by a charged particle moving in a magnetic field is given by the formula:
F = q * v * B
where:
F is the magnetic force,
q is the charge of the particle,
v is the velocity of the particle, and
B is the magnetic field strength.
The weight of the proton is given by the formula:
Weight = mass * acceleration due to gravity
Since the proton is moving horizontally, the gravitational force is balanced by the magnetic force. Therefore:
F = Weight
q * v * B = mass * acceleration due to gravity
Given the following constants:
charge of a proton (q) = 1.6 x 10⁻¹⁹ C,
mass of a proton (mass) = 1.67 x 10⁻²⁷ kg
acceleration due to gravity (g) = 9.8 m/s².
Substituting the known values into the equation, we can solve for the magnetic field strength (B):
B = (mass * gravitational acceleration) / (q * v)
B = (1.67 x 10⁻²⁷ kg * 9.8 m/s²) / (1.6 x 10⁻¹⁹ C * 2.50 x 10⁶ m/s)
B = 0.0414 T
Therefore, the strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally is approximately 0.0414 Tesla (T).
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Two cubic meters of a gas at 303 K are heated at constant pressure until the volume is doubled. What is the final temperature of the gas?
Answers
Answer:
\(V_1 = {2 \: m}^{3} \)
\(T_1 = 303 \: k\)
\(V_2 = 2(V_1) = 2(2) = 4 \: {m}^{3} \)
\(T_2 = ?\)
Here, it's mentioned that the pressure is constant.
By Charles law :\(\implies V \propto T \\ \)
\(\implies \dfrac{V_1}{V_2} = \dfrac{T_1}{T_2} \\ \)
\(\implies \dfrac{2}{4} = \dfrac{303}{T_2} \)
\(\implies \dfrac{T_2}{4} = \dfrac{303}{2} \)
\(\implies T_2 = \dfrac{303 \times 4}{2} \)
\(\implies T_2 = \dfrac{1212}{2} \)
\(\implies T_2 = 606 \: k \)
Two airplanes are flying above San Antonio, plane 1 is traveling 250 km/hr at a height of 2,000 m above the city. Plane 2 is traveling 150 km/hr at a height of 3,000 m above the city. Which of the statements below best describes the energy of each plane?
A Plane 1 and plane 2 have the same kinetic and potential energy
B Plane 1 has more kinetic energy than plane 2 but they have the same potential energy
C Plane 1 has more kinetic energy and plane 2 has more potential energy
D Plane 1 has more potential energy and plane 2 has more kinetic energy.
Answers
Answer:
C) Plane 1 has more kinetic energy and plane 2 has more potential energy.
Explanation:
he potential energy of an object is determined by its height above a reference level and its mass, while the kinetic energy of an object is determined by its mass and speed.
In this scenario, plane 1 has a higher speed than plane 2, but it is flying at a lower height. On the other hand, plane 2 is flying at a higher height, but it has a lower speed. Since the planes have different heights, they have different potential energies.
Therefore, the correct statement is: C) Plane 1 has more kinetic energy and plane 2 has more potential energy.
Answer:
C) Plane 1 has more kinetic energy and plane 2 has more potential energy.
Explanation:
he potential energy of an object is determined by its height above a reference level and its mass, while the kinetic energy of an object is determined by its mass and speed.
In this scenario, plane 1 has a higher speed than plane 2, but it is flying at a lower height. On the other hand, plane 2 is flying at a higher height, but it has a lower speed. Since the planes have different heights, they have different potential energies.
Therefore, the correct statement is: C) Plane 1 has more kinetic energy and plane 2 has more potential energy
studx the pulley in (figure 1) represents different pulleys that are attached with outer radius and inner radius indicated in the table. the horizontal rope is pulled to the right at a constant linear speed that is the same in each case, and none of the two separate ropes slips in its contact with the pulley.
Answers
The ranking of given scenarios on the basis of the linear speed of block is: C > E > A = B = D > F
What is a pulley system?A pulley is a wheel on an axle or shaft designed to assist in the movement and change of direction of a tensioned cable or belt, or in the transmission of power between a shaft and a cable or belt.
Whether belts, cables or chains, all cable pull systems work according to the same principle. For example, the speed of all pulleys in a pulley system can be calculated by taking the ratio of the diameters of each pulley.
Linear speed (v) ∝ R inner/R outer
So, the higher the value of ratio, higher will be the speed.
Let's calculate the R inner/R outer ratios for each case:
A) 0.4/0.8 = 0.5
B) 0.1/0.2 = 0.5
C) 0.5/0.6 = 0.83
D) 0.2/0.4 = 0.5
E) 0.3/0.4 = 0.75
F) 0.2/0.6 = 0.33
The speed in highest in case C, whereas it is lowest in case F.
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The complete question is as follows:
The pulley in (figure 1) represents different pulleys that are attached with outer radius and inner radius indicated in the table. the horizontal rope is pulled to the right at a constant linear speed that is the same in each case, and none of the two separate ropes slips in its contact with the pulley.
A) R outer = 0.8m; R inner = 0.4m
B) R outer = 0.2m; R inner = 0.1m
C) R outer = 0.6m; R inner = 0.5m
D) R outer = 0.4m; R inner = 0.2m
E) R outer = 0.4m; R inner = 0.3m
F) R outer = 0.6m; R inner = 0.2m
Rank these scenarios on the basis of the linear speed of block.
what is the source of energy that directly drives atp synthase in its production of atp?
Answers
The sun's thermal energy serves as the primary energy source for producing atp during the photosynthesis process. Essentially, it serves as the primary catalyst for all metabolic processes in plants. Protons diffusing through the F0 section of ATP synthase
What is adenosine triphosphate?All living things contain the energy-carrying molecule adenosine triphosphate (ATP) in their cells. When food molecules are broken down, chemical energy is released that is captured by ATP and used to power other cellular operations.
To drive metabolic events that would not happen naturally, to transfer necessary molecules across membranes, and to do mechanical labor, such as moving muscles, cells need chemical energy.
Chemical energy cannot be stored by ATP; lipids and carbohydrates such as glycogen serve this purpose. ATP is created when energy from storage molecules is required by the cell.
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What happens to the direction of an object as an unbalanced force acts on
it? Give an example
Answers
Answer:
When an unbalanced force acts on a body the side with the greater force's dircetion makes the object move along its direction
Also to find the net force acting on the bofldy you can subtract the two force acting on the body
In case of balanced force the net force will always be 0
Hello :)
Answer:
When an unbalanced force acts on an object, the side with the greater force's direction makes the object move along its direction. For example, when two cars collide on a head-on collision, both vehicles will move in the direction that the vehicle with the greater force is moving in.
When a drawing is shown at 1/8 ′=1 ′−0 " scale, that means: If something measures 1/8" on the drawing, it is 10 feet long in reality. The entire drawing is equal to or less than 1/8 " square. If something measures 1" on the drawing, it is 8'-0" long in reality. If something measures 1" on the drawing, it is 1/8 " long in reality.
Answers
if something measures 1" on the drawing, it is 8'-0" long in reality. If something measures 1" on the drawing, it is 1/8" long in reality is incorrect.
When a drawing is shown at 1/8" = 1'-0" scale, it means that if something measures 1/8" on the drawing, it is 1'-0" or 10 feet long in reality.
The correct statement about the scale 1/8" = 1'-0" is: If something measures 1/8" on the drawing, it is 1'-0" or 10 feet long in reality.
The scale 1/8" = 1'-0" is a common engineering scale used in architectural drawings. It means that every 1/8" on the drawing represents 1'-0" or 12 inches in reality. So, if something measures 1/8" on the drawing, it is 1'-0" or 10 feet long in reality. On the drawing, the entire drawing is equal to or less than 1/8 " square. If something measures 1" on the drawing, it is 8'-0" long in reality.This is because 1 inch on the drawing represents 8 feet in reality. So, if something measures 1" on the drawing, it is 8'-0" or 96 inches long in reality. Therefore, if something measures 1" on the drawing, it is 8'-0" long in reality. If something measures 1" on the drawing, it is 1/8" long in reality is incorrect.
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Imagine carefully weighing a metal can, leaving it out in the rain for weeks and weeks
until it was very rusted, and then carefully weighing it again. Would the can be heavier or lighter after it was rusted? Why?
Answers
Answer:
The can would be heavier.
Explanation:
The more rust is on the can, (Or object) the more it weights it down.
Answer:
The answer would be heavier, though it depends upon the type of metal. Rusting is essentially corrosion. Rust is often caused by a piece of metal getting soaked in water and then being exposed to oxygen. The rust will add more weight to the can so it becomes heavier.