A system has 600 j of heat and does 300 j of work. What is the change in internal energy?

Physics

1 answer:

Andreas93 [3]3 years ago

5 0

Answer:

The final energy is 1,700 J

Explanation: According to first law of thermodynamics:

=Final energy-initial energy=Change in internal energy

q = heat absorbed or released

w = work done by or on the system

w = work done by the system= {Work done by the system is negative as the final volume is greater than initial volume}

q = +500J {Heat absorbed by the system is positive}

w = work done by the system = -300J

Explanation:

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When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time o

dsp73

Answer:

c. about 1/10 as great.

Explanation:

While jumping form a certain height when we bend our knees upon reaching the ground such that the time taken to come to complete rest is increased by 10 times then the impact force gets reduced to one-tenth of the initial value when we would not do so.

This is in accordance with the Newton's second law of motion which states that the rate of change in velocity is directly proportional to the force applied on the body.

Mathematically:

$F\propto\frac{d}{dt} (p)$