A natural rock formation. Hope this helped.
Answer:
, downward
Explanation:
There is only one force acting on the ball during its motion: the force of gravity, which is given by

where
m is the mass of the ball
is the acceleration of gravity (downward)
According to Newton's second law,

where F is the net force on the object and a is its acceleration. Rearranging for a,

As we said, the only force acting on the ball is gravity, so F = mg and the acceleration of the ball is:

Therefore, the ball has a constant acceleration of
downward for the entire motion.
Wavelength times frequency = speed of light
7.5E14 x wavelength = 300,000 m/s
Wavelength in meters = 300,000 divided by 7.5E14
Explanation:
The gravitational force equation is the following:

Where:
G = Gravitational constant = 
m1 & m2 = the mass of two related objects
r = distance between the two related objects
The problem gives you everything you need to plug into the formula, except for the gravitational constant. Let me know if you need further clarification.