The mass of B is 8kg , the distance between C and B is 2r . Calculate the force between C and B​

Which of the following is an example of units for speed

In a system, when potential energy decreases, then entropy also decreases. true false

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.