Which of the following are clues that a chemical reaction may have taken place?

A. Temperature remains constant

B. Release of heat

C. Formation of a solid

D. Mass increase

Which is the best procedure to make a permanent magnet

Faraday's law of induction deals with how a magnetic flux induces an emf in a circuit. recall that magnetic flux depends on magnetic field strength and the effective area the field is passing through.

You have a large mug with hot tea and a small mug with ice tea. Which mug has more thermal energy?

Which two particles are found in the center of an atom? electrons and ions protons and neutrons protons and electrons electrons and neutrons

Use the equation to find v, if u=24, a=7, and t=4. v=u+at

Sunlight, wind, and running water are essentially "free." Yet renewable energy sources are a very small part of our energy consumption. Why is this?

If a force of 40 newtons moves a cart a distance of 9 meters, the work done is Nm. If the same force moves the same cart three times that distance, the work done is Nm. NextReset

What is the critical angle c for total internal reflection if the material is clear acrylic, with a refractive index of 1.5?

What is happening if energy input remains constant and voltage remains the same in a circuit, but the current decreases? A. The resistance has increased. B. The volts have decreased. C. The power has increased.

The velocity - time graph of a ball of mass 25g moving on road is as given below: (a) How much force does the road exert on the ball to bring it to rest? (b) What is the direction of the force exerted by the road?