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An ideal air conditioner operating on a Carnot cycle absorbes heat Q2 from a house at temperature T2 and discahrges Q1 to the outside at temperature T1, consumng elecrical energy E. Heal leakage into the house is related to the temperature difference by a linear relation, Q=A[T1-T2], when A is a constant. Derive an expression for T2 in terms of T1, A and E for continuous operation when the steady state has been reached.
The distance between atoms in a solid is typically around 2.0 x 10-10 m What is the wavelength of an electron with a kinetic energy of 110 eV
A 2.0 kg block slides on a frictionless 25o inclined plane. What are the magnitude and direction of the block's acceleration
A car of mass = 1300 travelling at 56.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and car's tires. What is the radius of the turn if = 20.0 (assuming the car continues in uniform ..
A ladder 6.10 m long leans against the side of a building. If the ladder is inclined at an angle of 76° to the horizontal, what is the horizontal distance from the bottom of ladder to the building.
At standard atmospheric pressure, the solid form of carbon dioxide called "dry ice" undergoes a phase change not to a liquid, how much of the water will turn to ice by the time all the dry ice has sublimated
A uniform drawbridge must be held at a 36.5 degree angle above the horizontal to allow ships to pass underneath. Find the magnitude of the force the hinge exerts on the bridge
A golf ball with a coefficient of restitution of 0.78 is tossed horizontally at 0.9 m/s from a height 1.5 m above the level ground. What is the maximum height of the first bounce of the golf ball
A group of students need to cross a river in the shortest time. In what direction should the students head the boat
Two wheels have the same mass and radius of 4.3 kg and 0.52 m, respectively. Find the net external torque that acts on each wheel
A cylindrical air tank has dimensions diameter = 0.2m and height 0.8m, Calculate the mass of air in the tank (kg) (have to use ideal gas law, molecular weight of air)
A brass lidscrews tightly onto a glass jar at 20°C. To help open the jar,it can be placed into a bath of hot water. Find the size of the gap (difference in radius) that develops by this procedure
When the skateboarder reaches the highest point, how far is this point horizontally from the end of ramp.
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