a 3.00 kg object has a velocity of ( 6.00 i – 2.00 j) m/s. (a) what is its kinetic energy at this moment? (b) what is the net work done on the object if its velocity changes to (8.00 i 4.00 j) m/s?

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.