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laiz [17]
2 years ago
11

Temperature and Thermal Energy

Physics
1 answer:
JulijaS [17]2 years ago
5 0

Answer:

the temperature increas

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State two environmental problems caused by coal fired power stations
Julli [10]

Answer:

Air pollution and water pollution.

Explanation:

The burning of coal causes air pollution, and coal fired power stations dump waste in large bodies of water.

6 0
3 years ago
All the bats living in a cave form a _______ of bats in the cave ecosystem.
kramer
I am sorry I cant find the answer. I was hoping to find the answer
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You hear the engine roaring on a race car at the starting line. Predict the changes in the sound as the race starts and the car
gogolik [260]

B. The sound of the engine will get louder and the pitch higher.

4 0
2 years ago
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A roller coaster car is going over the top of a 18-mm-radius circular rise. At the top of the hill, the passengers "feel light,"
Andre45 [30]

Answer:

0.29713 m/s

Explanation:

m = Mass of person

g = Acceleration due to gravity = 9.81 m/s²

v = Velocity

r = Radius = 18 mm

By balancing the forces in the system we have

mg-N=\dfrac{mv^2}{r}\\\Rightarrow mg-\dfrac{mg}{2}=\dfrac{mv^2}{r}\\\Rightarrow v=\sqrt{r(g-\dfrac{g}{2})}\\\Rightarrow v=\sqrt{0.018\times (9.81-\dfrac{9.81}{2})}\\\Rightarrow v=0.29713\ m/s

The velocity of the coaster is 0.29713 m/s

7 0
3 years ago
A 535 kg roller coaster car began at rest at the top of a 93.0 m hill. Now it is at the top of the first loop-de-loop.
iVinArrow [24]
Using g = 9.8 m/s2, the statement that best describes the roller coaster car when it is at the top of the loop-de-loop is that The car has both potential and kinetic energy, and it is moving at 24.6 m/s. The correct answer is <span>B) The car has both potential and kinetic energy, and it is moving at 24.6 m/s.</span>
4 0
2 years ago
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