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A copper sheet of thickness 3.90 mm is bonded to a steel sheet of thickness 4.40 mm. The outside surface of the copper sheet is held at a temperature of 170.0 °C and the steel sheet at 34.0 °C. (The thermal conductivity is 386 W/(m K) for copper and 16.3 W/(m K) for steel.) (a) Determine the temperature of the copper–steel interface. = °C (b) How much heat is conducted through 1 m2 of the combined sheets per second? = W
A simple capacitor is made by placing two spheres of radii p at a distance d>>p apart. Find the capacitance of the system of two spheres
An inexpensive microscope has a tube length of 12.0cm , and its objective lens is labeled with a magnification of 10x. Calculate the focal length of the objective lens
A thin metallic spherical shell of radius 0.377 m has a total charge of 5.03 × 10-6 C placed on it, What is the electric field at a distance of 0.785 m from the center of the spherical shell
A container of hot water at 80 degrees cools to 79 degrees in 15 seconds while it is placed in a room that is t 20 degrees. Use newton's law of cooling to estimate the time it will take for the container to cool from 50 degrees to 49 degrees.
Ginny's boat weighs 200 N and travels an unknown distance. If the boat does 2200 joules of work, how far does the boat travel
A 1300-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 530 N. A force Farrowbold is applied to the car by the road and propels the car forward.
Consider light with an initial intensity, I0. Calculate the fraction of light that gets through the following setups: (a) A single polarizer, (b) Two polarizers with their transmission axes 30 degrees apart
write an algebraic expression for the total pressure on the diver at that point and calculate the total pressure on the diver in atms
two identical blocks are stacked one on top of the other. the bottom block is free to slide across a frictionless surface. What is the maximum horizontal force that can be applied to the lower block without the upper block slipping
80 cm3 of water takes 12 min to cool from 40?C to 15?C in a draft; it is contained in a copper calorimeter of mass 150 g, Calculate the specific heat of the suspension in SI units
A cell membrane is composed of lipid molecules and approximately 11 nm thick, what is the approximate capacitance of a spherical cell that has a diameter of 11mu or micro m
A 20.0 kg box is pulled up a ramp a distance d = 15.0 m with a force of Fp = 165 N parallel to the ramp, as shown in the figure to the right. Find the work done on the block by gravity
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