What happens to the angle of the wave if it hits the Perspex at 90 degrees?

emote controls use invisible light of frequency just below the visible range. This part of the electromagnetic spectrum is called

Why is it called Newton's law of universal gravitation?

4. Solid 'X' turns into a liquid at 80 0C and into a gas at 140 0C. Describe the changes in the particles of X when it is heated from . 85 0C to 145 0Cm the 0 is degree

Consider a sphere and a cylinder of equal volume made of copper. Both the sphere and the cylinder are initially at the same temperature and are exposed to convection in the same environment. Which do you think will cool faster

The motor exerts a constant force on the cable pulling the crate to the right on a smooth floor. as a result, the crate is moving at constant acceleration a.

As part of a circus performance, a man is attempting to throw a dart into an apple which is dropped from an overhead platform. Upon release of the apple, the man has a reflex delay of 215 milliseconds before throwing the dart.

A train travels 90 kilometers in 1 hour, and then 82 kilometers in 5 hours. What is it's average speed?

3. A hydraulic lift is used to jack a 950-kg car 45 cm off the floor. The diameter of the output piston is 23 cm, and the input force is 375 N. a. What is the area of the input piston? (10pts) b.

An electric current in a metal consists of moving (A) Protons (B) neutrons (C) electrons

How does the idea of rotating disk in the nebular model explain certain observed celestial phenomena?