Which of the following accurately states the claim made by special relativity? O A. The speed of light in a vacuum is faster for accelerating frames of
reference.
B. The speed of light in a vacuum is slower for frames of reference
that have a constant velocity.
O C. The speed of light in a vacuum is the same for all frames of
reference.
D. The speed of light in a vacuum is the same for stationary frames
of reference.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57×10−21 newtons?

2. which of the following devices is associated with the reception of radio signals? o a. demodulator o b. transmitting antenna o c. oscillator o d. microphone