Consider the cart on the track above. The vectors shown are NOT necessarily to scale. The angle of the track is 22° and the mass of the cart is 1.6kg, but because of some dirt
on the track, the force of friction is 0.6 N. What is the magnitude of the normal force,
FN, of the track on the cart?
(Use g = -10m/s2, and answer to the
earest 0.1N, but do not include units)

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

The substances that are necessary for producing of certain hormones and that store and transport vitamins

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)