How much energy is required to change a 42g ice cube from ice at -11c to steam at 111c

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

Me pl give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.

If anyone who can me with this hw? i would really appreciate it