PHYSICS HIGH SCHOOL

Fossil fuels such as coal store chemical kinetic energy. Please select the best answer from the choices provideda. True
b. False

Answers

Answer 1
Answer: it would be true because In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
Answer 2
Answer: The person that said it was true is wrong i just took the test and it said it was false

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Look at the graph. During what interval is the object decelerating?A) 0-1s
B)5-20s
C) 20-4
D)40-50s

Answers

Answer:

Should be D the correct answer

Explanation:

Answer:

D

Explanation:

because the slope decreases

What is the entropy change of 450 g of water when it changes from liquid to steam at its usual boiling point? For water, L_F = 0.334 MJ/kg, L_V = 2.26 MJ/kg.

Answers

Answer:

2726.54 J/K

Explanation:

Entropy change = (m* L_(v))/(T)

where

m = mass of water = 450g = 0.45kg

L_(v) = 2.26 MJ/kg = 2260000 J/kg

T = temperature at which water change from liquid to steam = 100 degree Celsius = 272 + 100 = 373 degree kelvin.

Entropy change = (0.4* 2260000)/(373) = 2726.54 J/K

The process shown in this diagram contributed great amounts of heat to the young planet Earth and is best known as radioactive A) decay.
B) fission.
C) fusion.
D) isotope.

Answers

The process shown in this diagram contributed great amounts of heat to the young planet Earth and is best known as radioactive decay. Decay is known to release large amounts of heat.
Hey there

I believe the correct answer is (A) 

(A) = Decay 

Forces contribute to the net force on a car rolling down a ramp. a. Which force supports the car’s weight?
b. Which force accelerates the car down the ramp?
c. Which force acts against the motion of the car?

Answers

B)Gravity pulls the car downward, also its the only force in the downward direction.
 C)Force that acts against is friction.

In comparing the Ptolemaic system to the Copernican system, neither is entirely correct since Ptolemy said the earth was at the center and Copernicus said the planets had circular orbits.

Answers

In comparing the Ptolemaic system to the Copernican system, neither is entirely correct since Ptolemy said the earth was at the center and Copernicus said the planets had circular orbits. This is correct

Sehidy the given figure and calculate the load distance. Given: 325 N, 40 cm Unknown: 650 N, ?

Answers

the load distance is approximately 0.2 meters or 20 cm. To calculate the load distance in this scenario, we can use the principle of moments, which states that the sum of clockwise moments about a point is equal to the sum of counterclockwise moments about the same point when an object is in equilibrium.

In this case, we have two forces:

1. A known force of 325 N applied at a distance of 40 cm (0.4 meters) from the point of interest.

2. An unknown force of 650 N applied at an unknown distance, which we need to find.

Let's assume the unknown distance is "d" meters.

Using the principle of moments:

Clockwise Moment = Counterclockwise Moment

(325 N) * (0.4 m) = (650 N) * (d m)

Solving for "d":

d = (325 N * 0.4 m) / 650 N

d ≈ 0.2 meters

So, the load distance is approximately 0.2 meters or 20 cm.

To know more about moments:

brainly.com/question/33127998

#SPJ1
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