Answer: Remember speed is distance divided by time, so if he travels 1000 m in 7.045 s, his speed is
(1000 m)/(7.045 s) = 141.9 m/s.
Note there are 1609 metres in a mile, or 1 mi = 1609 m, so m = 1/1609 mi, or
141.9/1609 mi/s = 0.08822 mi/s. Now, note that 1 h = 3600 s, so the speed is
0.08822*3600 mi/h = 317.6 mi/h.
Answer: Energy exists if there is work and power is the measure of work done in unit time.
Explanation: Energy is defined as the ability to do work so that work equals to change in kinetic energy or change in potential energy which are two types of the mechanical energy of a moving object. Power is the rate of work done. In the other words power is the work done in a unit time.
Answer:
a)3pF has the greatest charge
b) 3pF to have the greatest voltage.
Explanation:
From the question we are told that:
1pF is parallel to 
And 3pF is in with series 1pF is parallel to
Generally the equation for Resultant capacitor is mathematically given by
Ohm's law
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points
a)
Since
The same charge flowing through 
flow through 3pF
Therefore
3pF has the greatest charge
b)
Voltage drop in series according to ohms law
Therefore the parallel share same voltage
Given
3pF to have the greatest voltage.
Answer : When a person applies force and covers distance then the person is doing work on an object.
