Physics, 01.10.2019 19:10 yurionice42069
In a solar water heater, energy from the sun is gathered by water that circulates through tubes in a rooftop collector. the solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. assume that the efficiency of the overall system is 28.0% (that is, 72% of the incident solar energy is lost from the system). what collector area is necessary to raise the temperature of 230 l of water in the tank from 20°c to 49°c in 2.6 h when the intensity of incident sunlight is 500 w/m2? the specific heat of water is 4186 j/kg·k. the density of water is 1.00 g/cm3.
Answers: 1
Physics, 21.06.2019 17:20
If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves
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Physics, 22.06.2019 04:00
Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.
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Physics, 22.06.2019 07:30
Which of the following is an example of motion in two dimensions?
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Physics, 22.06.2019 08:30
Hey student studies gravity using objects that have the same mass which two objects have the greatest gravitational force acting between them a. 100kg 1.0m 100kg b. 100kg 2.0m 100kg c. 100kg 2.0m 100kg big d. 100kg big 3.0m 100kg big
Answers: 1
In a solar water heater, energy from the sun is gathered by water that circulates through tubes in a...
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