which of the following explains how marie and pierre curie tried to influence the use of
they supported the use of radioactive elements in generating inexpensive power.
so
they opposed the use of
energy released during nuclear fission at the time of war.
they supported the use of radioactive elements for medical diagnostic purpos
they opposed the use of nuclear fusion during the manhattan project.

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

Describe the interaction that occurs between two objects with the same electrical charge.

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?