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Nat2105 [25]
2 years ago
5

4

Physics
1 answer:
andrew-mc [135]2 years ago
6 0

Answer:

zerihun beyene

Explanation:

<h2>state its advantages</h2>
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Answer:

his average velocity is

v =  \frac{19300}{1380}  = 13.9855(m \div s)

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The air in a car tire la compressed when the car rolls over a rock. If the air
stealth61 [152]

Answer:

the signs of heat and work are; -Q and -W

Explanation:

The first law of thermodynamics is given by; ΔU = Q − W

where;

ΔU is the change in internal energy of a system,

Q is the net heat transfer (the sum of all heat transfer into and out of the system)

W is the net work done (the sum of all work done on or by the system).

Now, The system in this case is the tire and since the air gets warmer, heat must have left the system. Therefore Q is negative (-Q).

Since work is done by the system, W remains negative.

Thus, the signs of heat and work are; -Q and - W

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3 years ago
Two objects were lifted by a machine. One object had a mass of 5000 kg, and was lifted at a speed of 2 m/sec. The other had a ma
Leokris [45]
Equation for ke = 1/2mv^2
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The object is fixed relative to the motion you are trying to describe.
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