Atoms with the same number of protons but different numbers of neutrons are

1) different elements

2) isotopes of the same element

3) isotopes of different elements

4) ions

If the road is wet the thinking distance will be longer. True or false. Why?

Required information NOTE This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.

For safety concerning a curve, you should: A. decelerate before the curve B. accelerate while driving up the curve C. shift to a higher gear D. adjust your speed to the current road conditions

If the man falls with his knees and ankles locked, the only cushion for his fall is a 0.480 cm give in the pads of his feet. Calculate the average force exerted on him by the ground in this situation.

This power is generated from a renewable resource; however, it still has some of the negative effects associated with using power generated by burning fossil fuels. (a) biomass (b) nuclear power (c) solar power (d) wind power

What kind of star gives rise to a type i supernova? a. white dwarf stars b. massive main sequence stars c. red giant stars?

Example of an object in motion

A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha particle doubles.

Why is it a good idea to extend your bare hand forward when you are getting ready to catch a fast-moving baseball? a. So you can catch the ball with a stiff arm, increasing the time to slow the ball thus deceasing the force. b.

At room temperature what is the strength of the electric field in a 12-gauge copper wire (diameter 2.05 mm that is needed to cause a 2.75 a current to flow?