Answer: The power is a measure of the rate at which work is done (or similarly, at which energy is transferred). The standard unit of power is Watt (1W). The power is determined by the change in energy, delta E (number of joules) and delta t, which is the time taken in seconds then: P= delta E/ delta t.
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Explanation:
The power that the customers receive is 163.2 MW
Explanation:
The efficiency of a system is given by

where
is the power in output
is the power in input
For the nuclear reactors in this problem, we have:
(power generated by the reactors)
(efficiency is 5.1%)
Therefore, the power that reaches the customers is:

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Answer:
h = 1.07 m
Explanation:
It is given that,
The average sped of the kingfisher, v = 4.6 m/s
Time, t = 1.4 s
Final speed, v = 0 (as it hits the water)
We need to find the height from which the bird dove. Let the height is h. According to the conservation of energy.

So, the bird dove from a height of 1.07 m.
Its true hopefully this helps you.
1). Frequency = (1/period) = 1/(20sec) = (1/20) per sec .
2). Frequency= (3 waves) / (4 sec) = (3/4) (per sec)
Period = (1/freq) = 1/(3/4 per sec) = (4/3) sec
3). Speed= (freq) x (wavelength) (2 per sec) x (5 m) = (2 x 5) ( m per sec)
Speed doesn't depend on amplitude.