Waves that move through matter only are called

When designing an experiment, it is important to make sure your hypothesis is A) creative and observable. B) testable and observable. C) reliable and creative. D) valid and testable.

Through x rays is harmful for human health it is used in medical field why?

Exercising above your target heart rate zone may A increase change of injury B decrease lung capacity C increase hydration D decrease perspiration

A ball is thrown from a rooftop with an initial downward velocity of magnitude vo = 2.9 m/s. The rooftop is a distance above the ground, h = 21 m. In this problem use a coordinate system in which upwards is positive.

The distance between magnetic field lines indicates A. whether the magnet will attract or repel another magnet B. the strength of the magnetic field C. the direction of the magnetic field

What is a light-year equal to? A. the distance light travels in one year B. the time it takes light to travel 10 trillion kilometers C. the mean distance between the Sun and the center of our galaxy D.

You have just installed a new sound card in your system, and Windows says the card installed with no errors. When you plug up the speakers and try to play a music CD, you hear no sound. What is the first thing you should do? The second thing? a.

Why does convection occur only in fluids?

The force of repulsion between two like-charged particles will increase if

An automobile tire having a temperature of -2.6°C (a cold tire on a cold day) is filled to a gauge pressure of 24 lb/in^2 What would be the gauge pressure in the tire when its temperature rises to 43◦C?