Dry cells become soft even when not in use. Explain.

Is the following sentence true or false? the faster the particles of a substance are moving, the more energy they have.

What is threshold frequency

When you hold a piece of chocolate in ypur hand, why does the chocolate melt?

Airports at high elevations have longer runways for takeoffs and landings than do airports at sea level. One reason is that aircraft engines develop less power in the thin air well above sea level. What is another reason?

How are stars distributed throughout an elliptical galaxy?

Which of the following diagnostic procedures uses ultrasound?

Why is it easier to read black text on a white background than to read green text of any light color?

If object A has more mass than object B, does object A contain more matter? Explain.

Describe a beach that was near stormy seas and powerful waves

We all depend on electricity. Most electricity is created by electromagnetic generators at large power plants and distributed through an electric grid.