What is the half life of an element of 1/8 of a sample remains after 12 years?

Describe the relationship between a moving objects mass and its kinetic energy

Locate the element helium (He) on the periodic table. What is the period number in which helium is found? What is the group name in which helium is found?

During an equinox, the number of daylight hours and nighttime hours are nearly equal all over the world. true or false?

If kenny lifts a box that weighs 6.4 kg, how many grams is he lifting?

The energy carried by a wave is dependent upon its wavelength, frequency, and amplitude. So long as speed is constant, the energy of a wave will increase as a result of an increase in which of these characteristics?

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?

A conductor has a net charge of + 24 uC. How many electrons are needed to make this conductor neutral

What does Force Means