Answer:
Correct answer: Third statement P = 4900 W
Explanation:
Given:
m = 500 kg the mass of the elevator
h = 10 m reached height after t = 10 seconds
P = ? power of the motor
The formula for the calculating power of the motor is:
P = W / t
since work is a measure of change in this case of potential energy then it is:
W = ΔEp = Ep - 0 = Ep
In this case we must take g = 9.81 m/s²
Ep = m g h = 500 · 9.81 · 10 = 49,050 W ≈ 49,000 W
Ep ≈ 49,000 W
P = Ep / t = 49,000 / 10 = 4,900 W
P =4,900 W
God is with you!!!
Answer is Global Warming causes destruction of our ecosystem due to increased temperatures, drought, fire, weed and pest infestations, more intense storms, water shortages, melting ice caps and glaciers, air pollution.
Answer:
С. 10.41 Ampere
Explanation:
Given that,
Power, P = 125 watts
Voltage, V = 12 volts
We need to find current. Power in terms of current and voltage is given by :
P = VI, I = current
So, the current is 10.41 A.
Answer:
Speed of light changes
Explanation:
Since glass is denser than air so the speed of light in glass is less than in air so light rays bend i.e. refract.
The particle model of light explains how light can
travel through empty space without a medium.
This type of models experiments with and studies particles of light so as to determine how it can move through various empty locations without having to rely on some sort of a medium to help it do so. It studies light at the atomic level, as opposed to other models.
