A1.8 kg book has been dropped from the top of the football stadium. it's speed is 4.8 m/s when it is 2.9 meters above the ground. what is it's mechanical energy

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass