Physics, 14.08.2019 08:20 samantha636
A2.4-m-high 200-m2 house is maintained at 22°c by an air-conditioning system whose cop is 3.2. it is estimated that the kitchen, bath, and other ventilating fans of the house discharge a houseful of conditioned air once every hour. if the average outdoor temperature is 32°c, the density of air is 1.20 kg/m3, and the unit cost of electricity is $0.1/kwh, the amount of money “vented out” by the fans in 10 hours is consider the specific heat to be 1.005 kj/kg·°c.
Answers: 1
Physics, 21.06.2019 22:30
The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.
Answers: 1
Physics, 22.06.2019 21:50
Determine the moment of the force f about an axis extending between a and c. express the result as a cartesian vector. a is at the origin, c is at (4,3,0) and f = (4i + 12j -3k) lb coming out of b (4,3,-2).
Answers: 2
Physics, 22.06.2019 23:00
Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?
Answers: 1
Physics, 23.06.2019 02:00
Ideal meters problem. what internal resistance is ideal for a voltmeter? what internal resistance is ideal for an ammeter?
Answers: 2
A2.4-m-high 200-m2 house is maintained at 22°c by an air-conditioning system whose cop is 3.2. it is...
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