When electrons absorb energy they are able to
a. move from exited states down to their ground states.
b. move from their ground states up to excited states.
c. attach to the nucleus.
d. form a bond with the nearest proton.

An object's buoyant force and weight mean the same thing.a. trueb. false

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.

Two positive charges are equal. which has more electric potential energy?