An alpha particle

1) is identical to a helium nucleus

2) can penetrate a sheet of aluminum

3) has a negative charge

4) all of these

Which best explains why a washing machine does not represent a closed system? A. Water and power come from external sources. B. Most washers can use a variety of laundry detergent brands. C. It has multiple cycles, such as wash and spin. D.

Drag each label to the correct location on the chart. Sort the items based on whether they are simple machines or compound machines. sewing machine pair of tongs fishing rod and reel seesaw wheelbarrow crane Reset Next

Is the classification for an instrument that produces sound by the vibration of a column of air?

If a generator makes 6000 revolutions in two minutes, how many revolutions does it make each second?

A 25 kg cart has 125kg*/s of momentum. How fast is the cart going

A car travels 35.0 mph north for 1.00 hour, then 40.0 mph east for 0.0500 hour, and finally 50.0 mph northeast for 2.00 hours. Calculate the average speed.

A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is held there. A) How much work is being done to hold the beam in place? B) How much work was done to lift the beam?

If Light is shone through the slits of a card onto a sheet of white paper describe what is seen.

When you break a magnet in half, how many poles does each piece have? Explain.

What can you use to unscrew a tiny screw?