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Suppose that a well-insulated room has a glass window that is 2.0 m high and 3.9 m wide. What is the rate of heat flow per second into the window from the environment outside if the temperature of the room is kept at 79.7o F and the outside temperature is 56.5o F? Assume that the glass is 0.33 cm thick, and express your answer in W.
A bullet of mass 8.80 x 10-3 kilogram, moving at 1250 m/s impacts a tree stump and penetrates 4.00 centimeter into the wood before coming to rest. If the similar force acted on the bullet and it had the equal impact speed but half the mass, calcul..
How much heat is conducted in 24 hours through a pane of glass 15 ft^2 in area and 3/16 inch thick if the surface temperatures are 60 degree F and 10 degree F?
Express the time in terms of given quantities. T catch = ? How far from Car B's starting line will the cars be when Car B passes Car A? Express your answer in terms of known quantities.
A small town stores its drinking water in a tower. What should be the tower's height
Waly Whacko claims to have invented a heat engine that will revolutionize industry. It runs between a hot source at 300oC and a cold sink at 25oC. What is the actual maximum efficiency of his engine
A rubber ball (mass 0.27 kg) is dropped from a height of 1.8 m onto the floor. Just after bouncing from the floor, the ball has a speed of 3.8 m/s. What is the magnitude and direction of the impulse imparted by the floor to the ball?
An ocean liner leaves New York City and travels 43° north of east for 189 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
A satellite orbits Neptune 4000 km above its surface. Given that the mass of Neptune is 1.02 x 10^26 kg, calculate the orbital speed of the satellite
A chair of weight 150 N lies atop a horizontal floor; the floor is not frictionless. find the magnitude of the normal force that the floor exerts on the chair
A "rocket car" is launched along a long straight track at t = 0 s. It moves with constant acceleration a1 = 1.2m/s2. At what time does the second car catch up with the first one
A uniform sphere and a uniform cylinder with the same mass and radius roll at the same velocity side by side on a level surface without slipping. What will be the percentage difference of the heights
An automobile has 53% of its weight on the front wheel. The front and back wheels are separated by 3 meter. Determine where is the center of gravity located with respect to the front wheels
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