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Tcecarenko [31]
3 years ago
11

In the formula used to solve problems related to the first law of thermodynamics, what does Q represent? A.internal energy

Physics
2 answers:
DENIUS [597]3 years ago
8 0

Answer:

B.heat

Explanation:

As we know by First law of thermodynamics

Q = \Delta U + W

as we know that

Q = heat or thermal energy supplied to the system

\Delta U = change in internal energy of the system

W = work done by the system

So first law of thermodynamics is basically energy conservation law in which energy supplied to the system is converted into its internal energy and work done by the system.

Blizzard [7]3 years ago
7 0
B, heat, is the correct answer. Heat is represented by a capital q in thermodynamic equations.
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Answer:

a) 3.66 s

b) 124.4 m

c) 3.12s

Explanation:

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1)

If we divide the distance by the difference in speed. This becomes

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2

From the previous part, we were able to confirm that it took 3.66 seconds for the red car to meet up the blue car. Also, the speed with which it were traveling was travelling at, was constant, so we only need to multiply it by the time from (1) to get the distance.

v = d * t = 34 * 3.66 = 124.4

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3

If the red car starts to accelerate the moment we see it, the time it will take, to get to the blue car will be less than what we had gotten. We can find this using one of the equations of motion.

S = ut + ½gt², where

S = 22

u = 6

t = ?

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22 = 6t + 1/3t²

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t1 = 3.12 s

t2 = - 21.12 s

We all know that negative time is not possible, so the answer is t1. At 3.12 seconds

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