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A room with a pine ceiling measured 10 m x 6 m x 2 cm thick. On a cold day the temperature on inside of the ceiling is T1 = 24 oC and in the attic T2 = 7 oC. If a 4 cm piece of insulation is added to the pine ceiling kpine = 0.120 J/msC kinsul = 0.042 J/msC If a 4 cm piece of insulation is added to the pine ceiling , find the interface temperature for the pine and insulation.
What is the maximum temperature and what is the (air-standard) thermal effiency?
Find an average magnitude of the induced emf . A bungee jumper, who's mass is 79 kg, jumps from a tall building. After reaching his lowest point, he continues to oscillate up and down, reaching the low point two more times in 8.2 s.
A swimmer, capable of swimming at a speed of 1.07 m/s in still water (i.e., the swimmer can swim with a speed of 1.07 m/s relative to the water), How long does it take the swimmer to cross the river
The mass m =1 kg is set up as a pendulum of length 0.6m as shown on the diagram. Initially in the position of h = 0.2m above the lowest point, and the pendulum is given initial speed of 1m/s. What is the largest mass M that might be temporarily lifte..
A dancer is standing on one leg on a drawbridge that is about to open. Before the drawbridge starts to open, it is perfectly level with the ground. The dancer is standing still on one leg.
A laser beam strikes one end of a slab of material, Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab
The first car has twice the mass of a second car, but only half as much kinetic energy. What were the original speeds of the two cars
A car is designed to get its energy from a rotating flywheel with a radius of 2.25 m and a mass of 525 kg. What is the kinetic energy stored in the flywheel
Consider two thick, concentric conducting shells that have radii as follows: Shell one has an inner radius of a and an outer radius of 2a. Determine the potential of each shell
Two carts on a frictionless air track are made to travel toward each other. As they collide they stick together. if the cart on the left has a mass of 250 grams and is moving at 0.2 meters per second to the right.
A 1.56m tall student stands before a vertical mirror. She can just see her whole body, from head to toe. How tall is the mirror
When two lenses are used in combination, the first one forms an image that then serves as the object for the second lens. Find the location and height of the image
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