Answer:
The change on the internal energy of the system is -2505 joules
Explanation:
To solve this problem, we're going to use the first law of thermodynamics, that it's essentially a law of conservation of energy. It states that the change on the internal energy of a system is the sum of the work (performed on the system or performed by the system) and the heat the system exchange with the surroundings (could be entering on the system or leaving the system), mathematically:
with ΔU the change on the internal energy, Q the heat and W the work.
As the question say the gun imparts on the potato 950 joules of work, that means the work is done by the gone so by convention it's negative. The heat released is 1555 joules and because is leaving the system is negative too, then:
This is due to the Doppler effect. The position you are in regard to the sound wave causes a change in the amplitude which affects frequency and moves the pitch up
Answer: I got an increase of 306 kJ in internal energy.
Explanation: I used the 1st Law and the sign convention to get the answer in the screenshot.
(sorry if i'm wrong)
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A neutral atom has the same number of protons as it does neutrons.
A. True
B. False
—————-
False
The number of pulse beats elapsed before the rubber ball hits the ground can be obtained when you carry out the experiment yourself. However, the pulse beat method of timing used by Galileo is not reliable because it varies from time to time.
Galileo was interested in studying how objects fall. His discovery was that all objects had the same acceleration irrespective of their mass. This observation was in direct contrast to Aristotle's assertion that the velocity of objects is proportional to their mass.
However, he used his pulse beats as timer during the experiment. This method is unreliable because the pulse beats of a person changes depending on the person's state of mind. A stop clock could have been a more reliable timer than pulse beats.
Learn more: brainly.com/question/7201885