A dam is thicker at the bottom than at the top mainly because:.
a. water is denser at deeper levels.
b. water pressure increases with depth.
c. surface tension exists only on the surface of liquids.
d. it looks better.
e. none of the above.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

We will use a video to study faraday’s law of electromagnetic induction by analyzing the induction that occurs due a coil of copper wire sliding along an air track that passes through an external magnetic field. specifically, we will: examine some of the main principles behind faraday’s law. apply lenz’s law to determine the direction of the induced emf. take measurements of the induced emf from the voltmeter as the coil passes into and out of the external magnetic field. use the horizontal scale provided to determine the speed of the coil. calculate the magnetic field induced in the coil as it passes into and out of the external magnetic field.

What happens when the number of protons in an atom changes