The gravitational force between two rocks 2 x 10^-4 N. They are separated by 2m. One rock has a mass of 3 x 10^3 kg. Find the mass of the other rock

The plum pudding model of the atom state that ?

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

What are two different ways you could find the value of a? explain these methods.