In refraction, when a wave travels from one medium to another, it a) changes speeds.

b) always moves in the same direction.

c) stays in step.

d) travels in the opposite direction.

A bicycle wheel is rotating at 49 rpm when the cyclist begins to pedal harder, giving the wheel a constant angular acceleration of 0.45 rad/s2. what is the wheel's angular velocity, in rpm, 9.0 s later?

Calculate the weight of a 65 kg person on earth

Assume you are looking at a Periodic Table that is NOT color coded. a. Describe where to look on the Periodic Table to find elements which have similar chemical properties. b. Explain why they have similar properties. c.

Which of the following instruments is used to measure air pressure? a. barometer b. anemometer c. hygrometer d. thermometer

If I push a 50kg mass with an applied force of 100N, then what was the maximum kinetic friction of the mass only accelerates at 1.5m/s^2?

Thomsonâs experiment is credited with the discovery of which particle?

When you drop a pebble from height h, it reaches the ground with kinetic energy k if there is no air resistance. from what height should you drop it so it will reach the ground with twice as much kinetic energy?

Explain two ways that technology has had a positive impact on the environment and two ways that it has had a negative impact on the environment.

A rockets initially at rest, it steady gains speed at a rate of 10m/s^2 for 4.6s during take off. What was the rocket's top speed?

What do you mean by kintic theory of matter