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Five kilograms of liquid water at 0° C is put into the freezer compartment of a Carnot refrigerator. The temperature of the compartment is -14.8° C, and the temperature of the kitchen is 26.5° C. If the cost of electrical energy is ten cents per kilowatt · hour, how much does it cost to make two kilograms of ice at 0° C?
A thin lens has a focal length of 10.00 cm for red light. If the index of refraction for the lens material tends to decrease with increasing wavelength
Describe what quantity shows the measurements are consistent with a large amount of dark matter:
A kid drops from a tree limb 3.0 m above a swimming hole. with what speed does the kid hit the water? if the kid is brought to rest 1.5 m below the surface of the water, what is the magnitude of the acceleration of the child after contact with the wa..
0.75 kg block of ice is sliding by you on a very slippery floor at 2.5 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.003 seconds. The block eventually slides at an angle of 22 de..
A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 53.0-gram mass is attached at the 27.0-cm mark, What is the mass of the meter stick
A 78.0kg skydiver can be modeled as a rectangular "box" with dimensions 21.0cm × 41.0cm × 185cm. What is his terminal speed if he falls feet first
A 6 kg block, starting from rest, slides down a frictionless incline of length 2 m. When it arrives at the bottom of the incline its speed is vf. At what distance from the top of the incline is the speed of the block 0.5 vf.
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed vfinal of the electron
he empire state building is 450 meters high. A pennydropped from the top would have what speed when it hits the sidewalk? A baseball player pops a flyball 20.0m straight up and the cathcer tossess his mask to catch the ball. How long will the cathc..
The intersection is 15 m wide. Her car's maximum deceleration is -6.8m/s2, whereas it can accelerate from 43km/h to 70km/h in 8.1 s. Overlook length of her car and her reaction time.
A model rocket is fired vertically from rest. It has a net acceleration of 17.0 m/s2. How long after liftoff does the rocket return to the ground
The mass of Mercury is 0.0550 times that of earth, and its radius is 0.380 times that of earth, Calculate the average density of Mercury (in kg/m3) given the earth's density is 5.52×103 kg/m3
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