Which devices might use electromagnets? pick all that apply.

1. audio speakers

2. plastic combs

3. trains

4. doorbells

5. revolving chairs

6. cranes

What is the temperature inside of a tree?

If it is raining it is ok for the driver to operate through lift from inside the vehicle.

Earth has an abundant amount of iron, but also has many elements heavier than iron. Form a hypothesis

Which statement is True? A. A resistor alters current, and a switch turns current on & off B. A resistor measures voltage and a switch changes AC to DC or DC to AC C. A resistor alters current and a switch measures voltage D.

A load of mass 5kg is raised through a height of 2m. (g=10mls)

Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that's above the ball.

Choose The units of 1/4πε0 are: A. N2C2 B. N • m/C C. N2 • m2/C2 D. N • m2/C2 E. m2/C2

What does a fern ultimately depend on as an energy source?

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away. A) As the source approaches you, the sound waves are compressed so the pitch of the noise increases.

If you have a beam perfectly balanced on a fulcrum and put a weight at the very end of one side, is there a way to know where you should put a heavier object on the other end?