Which devices might use electromagnets? pick all that apply.

1. audio speakers

2. plastic combs

3. trains

4. doorbells

5. revolving chairs

6. cranes

Why is genetic stability important?

Whether a truck comes to a stop by crashing into a haystack or a brick wall, the impulse is: Group of answer choices: O both the same. O greater with the haystack. O greater with the brick wall.

Temperature affects: metabolic activity the quality of the air the amount of sunlight in an ecosystem

Resolve the following two forces into horizontal and vertical components.

Which statement is true concerning the evidence for black holes? Scientists can see black holes with powerful telescopes. Scientists can see the effect of black holes on nearby stars. Scientists can see trails left in space by black holes.

Which example identifies a change in motion that produces acceleration? choices are: 1. a speed skater moving at a constant speed on a straight track 2. a ball moving at a constant speed around a circular track 3.

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