Radon is pumped off and sealed into tiny seeds using a 300 mg source of^226ra. (a) what activity (in mci) of radon will be available at each pumping if this is done at 7-day intervals? (b) how much time will be required to accumulate 200 mci of the gas?

What do you think car designers do if the damage caused by a crash test is too severe?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little