2 years ago

Help please physics!!!

Physics

2 answers:

Hitman42 [59]2 years ago

6 0

Answer:

I think c is the answer.....

IRISSAK [1]2 years ago

5 0

Answer:

D, because weight is dragging the object down. C would be friction holding the object back, and A would be the momentum generated by the person pushing the object.

Explanation:

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Read 2 more answers

Jin knows that the initial internal energy of a closed system is 78 J and the final internal energy is 180 J. He also knows that

lawyer [7]

As we know by the first law of thermodynamics

$Q = \Delta U + W$

here we know that

Q = heat given to the system

$\Delta U = U_f - U_i$

W = work done by the system

now here we can say

$\Delta U = 180 - 78 = 102 J$

$W = 64 J$

now we can say that heat will be given as

$Q = 64 + 102 = 166 J$

now here we can say that Jin does the error in his first step while calculation of change in internal energy as he had to subtract it while he added the two energy

So best describe Jin's Error is

<em>B )For step 1, he should have subtracted 78 J from 180 J to find the change in internal energy. </em>

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3 years ago