Answer:
C. Takes heat in, does work, and loses energy heat.
Explanation:
Heat engine is a system makes use of thermal energy (heat) to in order to do mechanical work.
This occurs by converting the heat into mechanical energy. This energy is then used to do work.
The key characteristic of a heat engine is that the substance with which work is done by, goes from a higher temperature to a lower temperature.
Hence, it loses heat as it does work.
You are sitting at the center of a large turntable at an amusement park as it is set spinning freely. You decide to crawl towards the edge of the turntable. Rotational speed will decrease
There is no external torque
hence , the angular momentum of the table is conserved
L (initial) = L ( final)
since , L = m*v*r
where
m = mass
v = velocity
r = radius
If the person is crawled towards the outer rim, then the rotational inertia of the turntable will increase. In order to conserve the angular momentum , its rotational speed will decrease as mass and radius cannot be altered .
To learn more about torque here :
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Answer:
The blender was running for 35 seconds.
Explanation:
Given:
Power of the blender is, 
Work done by the blender is, 
We know that, power is defined as the rate at which work is done by the body.
Here, we are given the power and work done and we are asked to find time taken.
Let the time of running of the blender be 't' seconds.
So, the power of the blender is given as:
Rewriting the above in terms of 't', we have
Plug in the given values and solve for 't'. This gives,
Therefore, the blender was running for 35 seconds.
The answer is nodes because nodes stay in a fixed position and i just learnt about this!
