When a 5.00-g sample of rbbr is dissolved in water in a calorimeter that has a total heat capacity of 1.655 kj·k–1, the temperature decreases by 0.400 k. calculate the molar heat of solution of rbbr?

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?