Physics, 02.08.2019 21:30, jojo492192
Ncold climates, including the northern united states, a house can be built with very large windows facing south to take advantage of solar heating. sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 39.0°c. if the house is well insulated, you may model it as losing energy by heat steadily at the rate 6 875 w on a day in april when the average exterior temperature is 4°c and when the conventional heating system is not used at all. during the period between 5: 00 p. m. and 7: 00 a. m., the temperature of the house drops and a sufficiently large "thermal mass" is required to keep it from dropping too far. the thermal mass can be a large quantity of stone (with specific heat 850 j/kg · °c) in the floor and the interior walls exposed to sunlight. what mass of stone is required if the temperature is not to drop below 20.0°c overnight?
Answers: 3
Physics, 22.06.2019 15:30, bloodry
Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples
Answers: 1
Physics, 22.06.2019 18:40, meganwintergirl
Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory
Answers: 2
Physics, 22.06.2019 19:30, jstephanie644
A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?
Answers: 1
Ncold climates, including the northern united states, a house can be built with very large windows f...
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