Acceleration = velocity / time.
Note that this is a position vs time graph.
From A to B, the graph is a straight line with a nonzero slope. This indicates a constant velocity.
From B to C, the graph is a straight line with 0 slope. This indicates a constant position, i.e. the object remains stationary.
From C to D, the graph is a straight line with a nonzero slope. This indicates a constant velocity.
Answer:c>a>b
Explanation:
Given
All the engine extracts same amount of heat(Q) from High-temperature reservoir
For a) 400 and 500 K
![\eta _{engine}=1-\frac{T_L}{T_H}](https://tex.z-dn.net/?f=%5Ceta%20_%7Bengine%7D%3D1-%5Cfrac%7BT_L%7D%7BT_H%7D)
![\eta _{engine}=\frac{work\ supplied}{heat\ supplied}](https://tex.z-dn.net/?f=%5Ceta%20_%7Bengine%7D%3D%5Cfrac%7Bwork%5C%20supplied%7D%7Bheat%5C%20supplied%7D)
![1-\frac{400}{500}=\frac{W_a}{Q}](https://tex.z-dn.net/?f=1-%5Cfrac%7B400%7D%7B500%7D%3D%5Cfrac%7BW_a%7D%7BQ%7D)
![W_a=\frac{Q}{5}](https://tex.z-dn.net/?f=W_a%3D%5Cfrac%7BQ%7D%7B5%7D)
For b)500 K and 600K
![1-\frac{500}{600}=\frac{W_b}{Q}](https://tex.z-dn.net/?f=1-%5Cfrac%7B500%7D%7B600%7D%3D%5Cfrac%7BW_b%7D%7BQ%7D)
![W-b=\frac{Q}{6}](https://tex.z-dn.net/?f=W-b%3D%5Cfrac%7BQ%7D%7B6%7D)
For c) 400 K and 600 K
![1-\frac{400}{600}=\frac{W_c}{Q}](https://tex.z-dn.net/?f=1-%5Cfrac%7B400%7D%7B600%7D%3D%5Cfrac%7BW_c%7D%7BQ%7D)
![W_c=\frac{2Q}{3}](https://tex.z-dn.net/?f=W_c%3D%5Cfrac%7B2Q%7D%7B3%7D)
So c will give the highest amount of work
c>a>b
Answer:
Hey mate, here is your answer answer. Hope it helps you
Explanation:
1. If a worker has come into contact with electricity the worker may not be able to remove themselves from the electrical source. The human body is a good conductor of electricity. If you touch a person while they are in contact with the electrical source, the electricity will flow through your body causing electrical shock. Firstly attempt to turn off the source of the electricity (disconnect). If the electrical source can not readily and safely be turned off, use a non-conducting object, such as a fibreglass object or a wooden pole, to remove the person from the electrical source.
2. C- Electrical energy.The term electrical activity means that the food itself has the power to generate electric energy that persists some period of time. This work presents a purely renewable energy as energy comes. the zinc reacts with food tissue.
Answer:
magnitude of v = 2.5 m/s, and in the same direction as the initial velocity of the 5 kg ball.
Explanation:
We use conservation of linear momentum in an elastic collision to solve for the unknown velocity v:
Pi = Pf
5 kg * 5 m/s + 10 kg * 0 m/s = 5 kg * 0 m/s + 10 kg * v
25 kg m/s = 10 kg * v
v = 25/10 m/s
v = 2.5 m/s
and in the same direction as the initial velocity of the 5 kg ball.