Explain why an electromagnet usually has a core of iron or steel

Which of the following terms are needed to describe velocity? Number Direction Mass Or units

When moving detainees by rail each car should be searched?

A property that describes how easily a substance undergoes chemical changes

What is a wave? In other words, what is the physical science term for a wave?

How do we know the universe is a closed system?

ions are atoms or groups of atoms that have a positive or negative charge. which of the following statements is true of ions?

1. According to the nebular theory, the solar system formed from? A. accretion of protoplanets. B. a large, thin cloud of dust and gas. C. colliding planetesimals. D. all of the above 2.

What is the difference between tangential acceleration and centripetal acceleration?

A ball rolls down a ramp. The ball has a mass of 1 kg and it has 18 joules of kinetic energy. What is the ball's speed?

Scientists now think high-fructose corn syrup may disrupt appetite control, making people more often o sleep get angry Ceat fast