Answer 4,520 feet
Explanation
The light and the sound were produced at the same time but sound took long to reach since is speed is much lower than the speed of light.
Speed is the rate of change of distance. So;
Distance = speed × time = 1130 × 4 = 4,520 feet.
Answer:
1500J
Explanation:
Work done = Force * Distance
Work = ?
Force = 50N
Distance = 30m
Work = 50 * 30
Work = 1500J
Answer:

Explanation:
Here we know that initial temperature of ice is given as

now the latent heat of ice is given as

now we also know that the mass of ice is

so here we know that heat required to change the phase of the ice is given as



Answer:

Explanation:
Given data
Coefficient of performance of a residential heat pump=1.6
Electrical power P=4kW
Required
Heat Q
Solution
The rate of heat produced is given as

Substitute the given values
So
Answer:
so your answer is gonna be the first one which is A