Asoccer ball collides with another soccer ball at rest. the total momentum of the balls a) is zero b) increased c) remains constant d) decreases

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.

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?