What happens to wavelength as a wave leaves the air and enters the Perspex?

a. It decreases

c. It stays the same

b. It increases

d. It becomes irregular

what's the equation that links change in gradational potential energy store, mass, gravitational field strength, height

a scientist spends most her time observing the motion of an object and how they behave which branch of science is she studying?

A stone is dropped from top of a tower of 50m high, simltaneously another stone is thrown upward with a speed of 20m/s find the time when them cross each other

Two waves have the same wavelength and frequency. how do their speeds compare?

A proton enters a uniform magnetic field of strength 0.5 T at 200 m/s. The magnetic field is oriented at an angle of 30° to the proton's velocity.

Which describes why the magma moves in the direction of the arrows? A The magma is cooled and becomes more dense by the core moving it toward the crust. B The magma is heated and becomes more dense by the core moving it toward the crust.

Determine the difference in the speed of sound in hydrogen at 0 degrees Celsius and in air at 30 degrees Celsius. Also indicate if is it faster or slower

A small car and a large truck are driving down a highway, which statement would support the premise that the truck has more momentum? A) A large truck has a much larger mass. B) A car has a smaller engine than a truck.

Is there a dark side of the moon? (note: this question can be effectively answered either yes or no, so it is important to explain your reasoning?

Jennifer, who has a mass of 40.0 kg, is riding at 25.0 m/s in her red sports car when she must suddenly slam on the brakes to avoid hitting a deer crossing the road. She strikes the seat belt, that brings her body to a stop in 0.400 s.