How do vibration produce sound?

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.

When light travels from one medium to another (from air to water, for example) it gets bent. This is called which of the following? A. reflection B. refraction C. diffraction D. polarization

Energy stored in gravitational field of interacting bodies is

How long must a simple pendulum be if it is to make exactly one swing per six seconds? (that is, one complete oscillation takes exactly 12 s.) ?

The outward pressure of hot gas in the sun is

One of the reasons it is important to keep our water supplies pollution free is potability. Water that is potable is A) polluted. B) oxygenated. C) fit to drink. D) unfit to drink.

3 forces that you exert when riding a bike

Kuiper Belt objects are composed of which substances? Select all that apply. A. Iron B. Silicon C. Water D. Methane E. Ammonia

If two protons are added to an oxygen nucleus, the result is

Which is larger than a single atom? a. magnetic domain b. electron c. neutron cloud d. proton