Differnces of similarities between light and sound

How does increasing the distance between charged objects affect the electric force between them? the electric force increases because the distance has an indirect relationship to the force.

A 70 kg person lands on firm ground after jumping from a height of 3 m. What is the average force (in N) exerted on her feet by the ground if she bends her legs as she lands so that her body moves 50 cm during the impact?

If you are at a train station and a train comes toward you, the train blows its whistle. as the train comes closer the whistle gets louder and as the train gets farther the whistle is quieter. What is this effect called?

An electric dipole consists of charges 2e and 2e separated by 0.88 nm It is in an electric field of strength 4.

Which of theses best describes the scientific process

What type of wave passes through the spring in the frog toy? Why?

Different kinds of substances have different properties of metals

Magma appears to be rising underneath the mid-oceanic ridges. a. True b. False

The energy required to crack a material

two punds of water vapor at 30 psia fill the 4ft3 left chmaber of a partitioned system. The right chmaber has twice the volume of the left and is initially evacuated.