What did the curies demonstrate by studying pitchblende?

uranium is not the only radioactive element.
all elements are potentially radioactive.
radium can cause anemia, bone and tissue damage, and death.
uranium salts emit something that can expose photographic film.

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.