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A down jacket has a surface area of 0.75 m2 and is filled with a 4.1 cm thick layer of down, which has a thermal conductivity of 6.0 multiply.gif 10-6 kcal/(s · m · C°). The coat is worn by a person whose skin temperature is maintained at 28° C. The outer surface of the coat is at -18° C. At what rate is heat conducted through the coat?
A guitar string has a tension on it of 6500 N and length of 1.2 m. what is the linear mass density of the string
The fiscal year of cramer company ends on december 31. Explain how much interest expense will cramer company report in its december 31, 2011 income statement?
A car is driven east for a distance of 49 km, then north for 23 km, and then in a direction 28° east of north for 28 km. FIND the magnitude (in km) of the car's total displacement from its starting point
A mountain climber, in the process of crossing between two cliffs by a rope, pauses to rest. She weighs 521 N. As the drawing shows, Find the tensions in the rope to the left and to the right of the mountain climber
A 50 g ball is fired horizontally with initial speed v_0 toward a 110g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110g ball swings out to a maximum angle the..
Suppose manufactures increase in size of compact disks. By what factor will the moment of inertia increase
A 7,800-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 2 m/s
A novice skier, starting from rest, slides down a frictionless 35° incline whose vertical height is 118 m. Explain how fast is she going when she reaches the bottom? Illustrate what was the initial speed of the arrow?
Two magnetic air pucks are approaching each other for a glancing blow. This time one of the pucks will have an additional mass (lead collar). estimate the mass of the collar if the mass of the puck itself is 0.199 kg and the mass of the second puck..
A 430g football is lying on the ground, then is kicked and is moving at 25.00 m/s. If the period of the impact was 0.001 s, what was the average force on the ball.
The electric charge of a proton is distributed over a volume. The distribution of the proton can be approximated by the exponential equation rho = e/(8*pi*b)exp(-r/b). r is the radial position inside the proton and b equals .23 * 10^-15 m. Find th..
Find the lowest energy of the system (in electron volts) and list the quantum numbers of all occupied states. Find when the current in the solenoid increases to 5.0 A in a period of 0.90 s.
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