Francium decays with a half-life of 22 minutes. If we start out with 639 mg of francium, how much would remain after 2.7 hours?

*Show all of your work

What is energy that comes from the movement of particles

When a ball strikes a surface, it changes its shape temporarily, what type of energy is stored with the ball as it is compressed?

A 50-kg man is driving his snowmobile at a constant speed. The engine applies a force of 360 N and the coefficient of kinetic friction between the snowmobile and the snow is 0.2. What is the mass of the snowmobile?

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

Define circuit training

Jack drops a stone from rest off of the top of a bridge that is 24.4 m above the ground. After the stone falls 6.6 m, Jill throws a second stone straight down. Both rocks hit the water at the exact same time.

What is the state of matter that consists of a gas-like mixture of free electrons and nucle of atoms that have been stripped of electrons

What is the process by which engine fuels burn

A sound wave travels at 330 m/sec and has a wavelenght of 2meters. calcuate the frequency and period

The volume of a gas increases from 18.7 m3 to 25.1 m3 while the pressure changes from 1.82 atm to 1.41 atm. If the initial temperature is 353 K, the final temperature of the gas is K.