Bats use a process called echolocation to find their food. this involves giving out sound waves that hit possible prey or food. when the waves hit an object, they bounce back to the bat, allowing the bat to locate its prey. what type of wave interaction is echolocation?

C. reflection

Explanation:

Bats use a process called echolocation to find their food. This involves giving out sound waves that hit possible prey or food. When the waves hit an object, they bounce back to the bat, allowing the bat to locate its prey.  

What type of wave interaction is echolocation?

absorption

diffraction

reflection

refraction

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

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.