In which state of matter does a mineral exist? a) solid
b) liquid
c) gas
d) plasma
e) more than one of these

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?