Plz if the mass of an object is 44 kilograms and its velocity is 10 meters per second east, how much kinetic energy does it have? a. 0.44 joules b. 2,200 joules c. 220 joules d. 4,400 joules e. 440 joules

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Aphysical change is a change in the size, shape,, or stafe of matter true or false

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.