If you add ice to a glass of room-temperature water, does the water warm the ice or
does the ice cool the water? explain.

By the First Law of Thermodynamics heat will flow from the hotter body to the cooler one.  The water warms the ice and in doing so the water gets colder.  

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.