3. Shortwave radio is broadcast between 3.50 and 29.7 MHz, To what range

of wavelengths does this correspond? Why do you suppose this part of

the spectrum is called shortwave radio?

The wavelengths are 85.71m and 10.10m

They're called shortwave radio because their range are smaller compared to what's obtainable in radio waves which can be high as much as 1000m

Explanation:

Using the relationship y = c /f

Where y represents the greek alphabet lambda is the wavelength

C = speed of light = 3.0 *10⁸ m/s

f = frequency of the wave

1. y = c / f = 3.0 * 10⁸ / 3.50 * 10⁶ = 85. 71m

2 y = c / f = 3.0 * 10⁸ / 29.7 * 10⁶ = 10.10 m

From the above calculation, none of the wavelength met the usual 1000m for radio wave hence they're referred to as shortwave radio.

answer; the correct answer is technician a; ///100%good luck

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.