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3 years ago

15

A car is traveling in a straight line at a constant speed. The car's engine is exerting a constant force on the car. Explain why

the car is not accelerating.

1 answer:

kherson [118]3 years ago

5 0

Answer:

because its not going down a long hill instead its going on a leveled street

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A simple machine that is a straight slanted surface is

rjkz [21]

Inclined plane is a simple machine that is a straight slanted surface.

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4 years ago

What is the magnitude of the force that lifts a 3-kilogram object straight upwards?

frez [133]

Any force of 29.4 Newtons or greater can do it.

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3 years ago

Read 2 more answers

If the element gallium has an atomic number of 31 and an atomic mass of 70, how many neutrons does it have?

Mumz [18]

Answer:

The answer is 39.

Explanation:

The atomic number refers to the number of protons and the atomic mass is the sum of the protons and neutrons. So, you would just do 70 - 31 and that gets you 39.

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2 years ago

7. A block of copper of unknown mass has an initial temperature of 65.4oC. The copper is immersed in a beaker containing 95.7g o

dolphi86 [110]

Answer:

37.34372 kg

Explanation:

m = Mass

$\Delta T$ = Change in temperature

1 denotes water

2 denotes copper

c = Heat capacity

Heat is given by

$Q=mc\Delta T$

In this case the heat transfer will be equal

$m_1c_1\Delta T_1=m_2c_2\Delta T_2\\\Rightarrow m_2=\frac{m_1c_1\Delta T_1}{c_2\Delta T_2}\\\Rightarrow m_2=\frac{95.7\times 4.18(24.2-22.7)}{0.39(65.4-24.2)}\\\Rightarrow m_2=37.34372\ kg$

Mass of copper block is 37.34372 kg

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3 years ago

Alyssa is wins a lottery. According to the concept of the hedonic treadmill,

timama [110]

Answer: the first answer is correct

Explanation:

she goes back to a stable feeling

8 0

3 years ago