Name the device which converts: chemical into light

When two waves undergo complete, constructive interference, which of the following increases? A. speed B. amplitude C. wavelength D. frequency

A uniform solid cylinder with a radius of 10 cm and a mass of 3.0 kg is rotating about its center with an angular speed of 33.4 rpm. What is its kinetic energy?

What is a force? A. A push or pull B. An influence that causes an object to change C. A thrust or a torque

What is a common way to correct nearsightedness? Place a concave lens in front of the eye. Place a convex lens in front of the eye. O Place a flat lens in front of the eye.

Why does a round pizza come in a square box? Random questions

As a rocket moves farther and farther upward from the launch pad, what happens to the strength of Earth's gravitational field around the rocket? a. It gets weaker. b. It grows stronger. c. It remains constant.

Sully uses a battery and a coil of wire to create an electromagnet. Using the same materials, if he wants to increase the strength of his electromagnet, he must the number of loops in the coil of wire along its length.

How long does it take for light from a star that is 8 light years away to reach Earth? Question 7 options: 8 earth minutes 16 earth minutes 8 earth years 16 earth years

Why does water in hot springs always remain hot? Why doesn't it's thermal energy spread out?

True or false All forces are different; each exerts a particular type of effect on a object