*15 points* for both ramp heights, you calculated the average speed for the car's entire motion (both on
the ramp and the floor), as well as the average speed for two intervals of the same motion
(interval on the ramp and interval on the floor). write a brief paragraph on how these
"intervals" describe the car's motion more accurately than the average speed of the
entire motion. be sure to explain how this accuracy could have been improved by breaking the
car's motion down into even smaller intervals.

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

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)