A sound wave has a wavelength
of 0.0325 m and a frequency of
9380 Hz. What is the speed of
the wave?
(Unit = m/s)

The speed of wave is 304.85 m/s.

Explanation:

Speed is the measure of rate of motion of any object. So in other words , it can be determined as the product of wavelength and frequency. As wavelength is the measure of distance covered or the distance between two consecutive crests or troughs. And frequency is inversely proportional to the time period of complete cycle.

Thus, speed = Wavelength × Frequency

As here the wavelength is given as 0.0325 m and the frequency is given as 9380 Hz, then

Speed of wave = 0.0325 × 9380 = 304.85 m/s

So the speed of wave is 304.85 m/s.

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.

explanation:

wheres the pic