A line or region of calm water where waves should be is explained by: refraction

interference

diffraction

Can we see the back side of the moon from earth?

Which of the following is the best hypothesis for this experiment? (Remember that the variable we are going to manipulate is the IF part of a hypothesis and the variable we hope will respond and we will measure is the THEN part of a hypothesis.

A new roller coaster contains a loop-the-loop in which the car and rider are completely upside down if the radius of the loop is

For which of the following characteristics speed wavelength and frequency is light similar to microwaves and for which does it differ?

Which lists the correct steps that occur when using a diffraction grating to bend light?

Consider a helium balloon on a string tied to the seat of your stationary car. The windows are closed, so there is no air motion within the car. The car begins to accelerate forward. Which way will the balloon lean, forward or backward

The force of gravity acts upon meteors from the rocky asteroid belt between mars and Jupiter. Where is the force of gravity most likely to pull these meteors

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. Which of the following best describes how such a telephone is able to transmit and receive information? A.

Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder.

A rock is thrown from a cliff and hits the ground five seconds later at a distance of 50 m from the cliff how high was a cliff