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

What is the difference between accuracy and precision and which is most important to scientific measurement?

A 1400 kg vehicle travelling at 22 m/s slows at a constant rate to 4.5 m/s in 6.75 s. What was the net force acting on the car during this time?

A track coach with a meter stick and a stopwatch is trying to determine if a student is walking with constant speed. he should ...

Suppose a 50-turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. The coil originally has an area of 0.250m2. It is stretched to have no area in 0.100 s.

Why do you think it is a driving force of weather around the world?

If 2 grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 46 grams of X to form the same compound?

How do positive and negative charges interact with each other?

What is electricity

What happens to the density as one progresses through the layers of the earth from the lithosphere toward the inner core

What is tiny holes on the surface of a plant?