A monkey (mass m) is swinging on a vine of length L while carrying a bunch of bananas (a large bunch, mass m/2). His swinging mo
1 answer:
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The average dissipated power in a resistor in a ac circuit is:
where R is the resistance, and
is the root mean square current, defined as
where
is the peak value of the current. Substituting the second formula into the first one, we find
and if we re-arrange this formula and use the data of the problem, we can find the value of the peak current I0:
where R is the resistance, and
where
and if we re-arrange this formula and use the data of the problem, we can find the value of the peak current I0:
Answer:
Power is the rate at which energy is transformed.
The SI unit of power is the watt.
Power is the rate at which work is done.
Explanation:
In this question we have to choose the statements related to Power that are True.
In this sense, Power is the speed with which work
is done. Its unit is Watts (
), being
.
Power is mathematically expressed as:
Where is the time during which work
is performed.
On the other hand, the Work done by a Force
refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path. It is a scalar magnitude, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter (
).
So, according to this explanation, the true statements are:
Power is the rate at which energy is transformed.
The SI unit of power is the watt.
Power is the rate at which work is done.