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A particular air conditioner can remove heat from a room at a rate of 150 W. Heat is also added to the room through heat conduction with a 15 m^2 panel of windows. How thick should the window pane be in order for the air conditioner to exactly remove the heat coming in through the window if it is 27 C inside and 36 C outside? Assume heat is only exchanged with the room through the air conditioner and the window and that the thermal conductivity of glass is 0.8 W/(mK). Should the air conditioner be replaced, explain?
Carbon dioxide gas (CO2) enters a pipe at a pressure of 3.5 MPa and a temperature of 450 K at a mass flow rate of 2 kg/sec. This gas flow is cooled at a constant pressure until its temperature drops to 400 K at the exit of the pipe.
A series RLC circuit has a 242 Hz resonant frequency, and is driven by an AC voltage source at 315 Hz. Find the maximum voltage of the source
Consider the system described in the example with m1 = 0.51 kg and m2 = 0.40 kg. If F is sufficiently large, it is clear that the block will accelerate to the right. Find the range of F that allows the system to remain at rest
A 1.50 V battery supplies 0.350 W of power to a small flashlight for 20.0 min. How much charge does it move
A hand-driven tire pump has a 2.50 cm diameter piston and a maximum stroke of 24.0 cm. What average force do you exert on the piston
A bar of gold measures 0.16 m cross 0.056 m cross 0.049 m. How many gallons of water have the same mass as this bar
A 6.50 g bullet moving at 726 m/s strikes a 590 g wooden block at rest on a frictionless surface. What is the speed of the bullet-block center of mass
A 2-2-2 kinematic coupling uses 19-mm silicon nitride balls and tungsten carbide vees. Determine the Hertz contact stresses for a 50 N coupling load. Is this kinematic coupling overloaded? Where are the locations of maximum compressive, shear and ten..
When a train's velocity is 12.0 m/s eastward, raindrops that are falling vertically with respect to the earth make traces that are inclined 30.0 degree to the vertical on the windows of the train. What is the horizontal component of a drop's veloci..
A skier is gliding along at 4.72 m/s on horizontal, frictionless snow. He suddenly starts down a 19.2° incline. His speed at the bottom is 27.8 m/s. What is the length of the incline?
A nail gun fires a nail into a piece of wood. The nail is going a velocity of 9.0 m/s right before entering the wood. The mass of the nail is 0.060 kg, how far into the wood does the nail go
A traveling wave in a string of linear density 0.01 kg per meter is described by the wave function y = 0.02 m sin(50 rad/m x - 1750 rad/s t). find the wave speed and the tension in the string
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