Which of the following can be explained only by the wave nature of electromagnetic radiation?

A. Atomic Line spectra

B. Electron Diffraction

C. Photoelectric Effect

D. X-ray Diffarction

A jet plane is moving at a constant velocity on a flat surface. Which forces act against the forward motion of the plane? A. Gravity and engine thrust B. Engine thrust and friction C. Friction and air resistance D. Air resistance and gravity

The solar system consists of the sun and nine planets moving in definite orbits around the sun. How do the outer planets differ most from the inner planets? A. size and composition B. having shorter years C. the plane of their orbits D.

Two people are rowing a boat at a speed of 9 m/s. in 3 seconds, they dock the boat at a pier. what is the boatâs acceleration?

Which state of matter has the greatest distance between the individual particles

What does the phrase "1 meter per second per second" means? A. The velocity of an object can increase by 1 meter per second, for every minute of time measured. B.

How are all mobile phones different from fixed telephones in the way that they transmit and receive voice messages?

Can i tank of oxygen gas ever be half empty

Marcia ran at a speed of 3.50 meters per second. How fast was she running in kilometers per hour?

What is the gravitational force related to the distance between two objects?

How does a rilling can work