How does an object become negatively charged? a) it gains electrons b) it loses electrons c) it gains protons d) it loses protons

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

How would doubling the made of an object change the objects potential energy

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.