Two objects exert a gravitational force of 3 n on one another when they are 10 m apart. what would that force be if the distance between the two objects were reduced to 5 m?

a. 1.5 n
b. 6 n
c. 12 n
d. 24 n

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

What are similarities and differences between refraction, reflection, diffraction and absorption?