A66-foot-tall woman walks at 55 ft/s toward a street light that is 2424 ft above the ground. what is the rate of change of the length of her shadow when she is 19 ft19 ft from the street light? at what rate is the tip of her shadow moving? let l be the length of the woman's shadow and let x be the woman's distance from the street light. write an equation that relates l and x.

What do butterflies have on their feet which allows them to sense different strengths and types of nectar? a.mechanoreceptors b.acoustic receptors c.substratum receptors d.chemoreceptors

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)

From the perspective of an employee that effective channeling of work related information and concerns