An electric clothes dryer draws 20 a of current from a 240-v wall outlet. how much power, in watts, does it use?

Power, P = 4800 watts

Explanation:

Given that,

Current drawn by an electric clothes dryer, I = 20 A

Voltage, V = 240 volts

We have to find the power used by the dryer. It is given by :

Power of an electrical appliance is given by the product of voltage and current flowing.

P = V × I

P = 240 V × 20 A

P = 4800 watts

Hence, the power of the electric clothes dryer is 4800 watts.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.