Help on these 2 pls ASAP

BTW ITS A SCI QUESTION

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Determine the maximum r-value of the polar equation r =3+3 cos 0

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.