Answer:
The product of the charge and voltage is the work .
Explanation:
According to Ohm's law
The voltage is equal to the product of the current and resistance. Its unit is volt.
Power :
Power is the defined as the electric energy per unit time. its unit is J/s or watt.
According to Ohm's law,
The power is equal to the square of voltage divided by the resistance.
The power equal to the product of resistance and square of current.
The product of current and voltage is equal to the power.
Current :
The current is equal to the voltage divided by the resistance.
The ampere is the unit of current.
Work : Work is related to the energy.
The Voltage is equal to the energy divided by the charge.
The product of charge and potential is called energy.
Hence, The product of the charge and voltage is the work .
Answer:
25 seconds
Explanation:
Assuming the woman is accelerating at a constant rate of from the initial velocity, u=4.20 m/s, to the final velocity, v=5.00 m/s.
Let she takes t seconds to cover the distance, s=115 m.
As acceleration,
Now, from the equation of motion
[ from equation (i)]
seconds.
Hence, she takes 25 seconds to walk the distance.
Answer:
The frequency of the oscillation is 2.45 Hz.
Explanation:
Given;
mass of the spring, m = 0.5 kg
total mechanical energy of the spring, E = 12 J
Determine the spring constant, k as follows;
E = ¹/₂kA²
kA² = 2E
k = (2E) / (A²)
k = (2 x 12) / (0.45²)
k = 118.519 N/m
Determine the angular frequency, ω;
Determine the frequency of the oscillation;
ω = 2πf
f = (ω) / (2π)
f = (15.396) / (2π)
f = 2.45 Hz
Therefore, the frequency of the oscillation is 2.45 Hz.