A 10.0-kg block is released from point A in Figure 3. The track is frictionless except for the portion between points B and C , which has a length of 6.00 m. The block travels
down the track, hits a spring of force constant 2250 N/m, and compresses the spring
0.300 m from its equilibrium position before coming to rest momentarily. Determine the
coefficient of kinetic friction between the block and the rough surface between B and C.

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).