If the frequency of the radio station is 88.1MHz(8.81 •10^7Hz), what is the wavelength of the wave used by the radio station for its broadcast? The answer should have three significant figures

3.41m

Explanation:

The following were obtained from the question:

f (frequency) = 8.81x10^7Hz

V (velocity of electromagnetic wave) = 3x10^8 m/s

λ (wavelength) =?

Velocity, frequency and wavelength of a wave are related with the equation below:

V = λf

λ = V/f

λ = 3x10^8 /8.81x10^7

λ = 3.41m

Therefore, the wavelength of the radio wave is 3.41m

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.