Two antennas located at points a and b are broadcasting radio waves of frequency 107.0 mhz. the signals start in phase with each other. the two antennas are separated by a distance d = 10.1 m. an observer is located at point p on the x axis, a distance x = 93.0 m from antenna a. the points a p and b form a right triangle.

a) what is the phase difference between the waves arriving at p from antennas a and b? enter your answer in radians (rad).

b) now observer p walks along the x axis toward antenna a. what is p's distance from a when they first observe fully constructive interference between the two waves?

c) if observer p continues walking until they reach antenna a, at how many places along the x axis (including the place you found in the previous problem) will they find maxima in the radio signal due to constructive interference?

connect the batteries in series and hope

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.