You are installing a heat pump whose cop is half the cop of a reversible heat pump. you plan to use the pump on chilly winter nights to increase the air temperature in your bedroom. your bedroom's dimensions are 5.35 m ? 3.6 m ? 2.7 m. the air temperature should increase from 63° f to 68° f. the outside temperature is 35° f, and the temperature at the air handler in the room is 112° f. if the pump's electric-power consumption is 787 w, how long will you have to wait for the room's air to warm if the specific heat of air is 1.005 kj/(kg · c°)? assume you have good window draperies and good wall insulation so that you can neglect the release of heat through windows, walls, ceilings, and floors. also assume that the heat capacity of the floor, ceiling, walls, and furniture are negligible. (assume 1.293 kg/m3 for the density of air.)

Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.

The inside surface of a cylindrical-shaped cave of inner diameter 1.0 m is continuously covered with a very thin layer of water. the cave is very long and it is open on both ends. the water on the cave surface is at a constant temperature of 15.5 °c. the cave is constantly exposed to wind such that 15.5 °c air flows through the cave at 4.5 m/s. the kinematic viscosity of the air is 14.66 x 10-6 m2/s and the molecular diffusion coefficient of water vapor in the air is 0.239 x 10-4 m2/s. because the cave diameter is so large, the flow of wind down the length of the cave, in the x direction, can be treated like it is external flow and the cave surface can be approximated as flat where appropriate. calculate the x value, in a) the transition to turbulent flow occurs at rex meters, where the air flow transitions from laminar to turbulent along the inside surface of the cave b) calculate the x value, in meters, where the bulk steady state concentration of water vapor in the air flowing in the cave is 10% of the saturation concentration. assume the air at the surface of the water layer is 100% saturated with water vapor. assume the wind entering the cave contained no moisture before it entered the cave. take into account the transition from laminar to turbulent flow when solving part b

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.