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On a hot Saturday morning while people are working? inside, the air conditioner keeps the temperature inside the building at 23 degrees°C. At noon the air conditioner is turned? off, and the people go home. The temperature outside is a constant 36 degrees°C for the rest of the afternoon.
If the time constant for the building is 3 ?hr, what will be the temperature inside the building at 4 : 00? At 6 : 00?? When will the temperature inside the building reach 26degrees°?C?
A mass hanging vertically from a spring oscillates with a period T. If this experiment were taken to the Moon, then how would the period of oscillation change? Explain. A pendulum of length L has a period T. How would the period change if the pendu..
A parallel plate capacitor has plate area 1 m2 and plate separation of 0.5 cm. How much work is required to pull the glass from between the conducting plates
500 J of work are done on a system in a process that decreases the system's thermal energy by 200 J. How much energy is transferred to or from the system as heat
Aircraft compass showed that the aircraft moves to the north and the speed indicator showed that the aircraft is moving at a speed of 240 km / h. If there is a wind blowing at a speed of 100 km / h from the west to the east, what is the velocity rela..
A block is connected between two springs on a frictionless, horizontally level track. what is the mass of the block
A body of mass m1 with initial velocity v0 collides with a second body, of mass m2, initially at rest. Calculate the ratio of this total energy to the initial LAB energy K0, in term of the masses m1 and m2.
That is, assume that the panels generate an average power of 1.0 kW. Estimate the break-even time for your system by comparing the cost of your system to the cost of buying the electricity from the utility company at a price of $0.20 per kilowatt..
A rectangular copper strip 1.0 cm wide and 0.1cm thick carries a current of 5.0A. Find the Hall voltage developed when a magnetic field of 1.5T is applied perpendicular to the strip
A 35 mm camera with interchangeable lenses is used to take a picture of a hawk that has a wing span of 1.5 m. The hawk is 39 m away. What would be the ideal focal length of the lens used
How much waste heat is produced by an electrical power station that uses 1.00 ? 1014 J of heat input with an efficiency of 40.0%? What is the ratio of waste heat to work output
A solenoid of length 13 cm consists of a wire wrapped tightly around a wooden core. The magnetic field strength is 5.0 T inside the solenoid. what does the magnetic field become
A large cylindrical tank contains 0.720 of nitrogen gas at 22.0 and 1.20×105 (absolute pressure). What will be the pressure if the volume is decreased
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