At the instant that the velocity of the crate is v⃗ =(3.40m/s)ι^+(2.20m/s)j^, what is the instantaneous power supplied by this f
1 answer:
I found some missing information about this problem online. We are given the force:
Power is defined as the rate of doing work.
This is the formula:
Where P is power, W is work.
Work is defined as:
F is the force and r is the displacement.
If we assume that force is not changing (it's constant) with time we get:
Keep in mind that both force and velocity are vectors, so we have to multiply each component separately.
Finally, we get:
Power is defined as the rate of doing work.
This is the formula:
Where P is power, W is work.
Work is defined as:
F is the force and r is the displacement.
If we assume that force is not changing (it's constant) with time we get:
Keep in mind that both force and velocity are vectors, so we have to multiply each component separately.
Finally, we get:
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, frequency f and speed of light c for an electromagnetic wave is
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Answer:
(a) Heat transfer to the environment is: 1 MJ and (b) The efficiency of the engine is: 41.5%
Explanation:
Using the formula that relate heat and work from the thermodynamic theory as: solving to Q_out we get:
this is the heat out of the cycle or engine, so it will be heat transfer to the environment. The thermal efficiency of a Carnot cycle gives us:
where T_Low is the lowest cycle temperature and T_High the highest, we need to remember that a Carnot cycle depends only on the absolute temperatures, if you remember the convertion of K=°C+273.15 so T_Low=150+273.15=423.15 K and T_High=450+273.15=723.15K and replacing the values in the equation we get: