Two boxes are stacked on a table. The top box is 75 kg and the box on the bottom is 100 kg. a) What is the magnitude of the normal force on the top box?
b) What is the magnitude of the normal force exerted on the bottom box by the table?

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 are some important factors to consider when choosing a warm-up before your workout?

Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false