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What is the rate of heat loss through a glass window 3.0 mm thick if the outside temperature is -20o C and the inside temperature is 20o C? If a storm window is installed having the same thickness of glass but with an air gap of 7.5 cm between the panes, what will be the corresponding rate of heat loss?
a ferromagnetic material has a relative permeability of 2.87 atilde- 104. find the magnitude of the magnetic dipole
In the figure, block 1 of mass m1 slides from rest along a frictionless ramp from height h = 2.1 m and then collides with stationary block 2, which has mass m2 = 5m1. After the collision, block 2 slides into a region where the coefficient of kinetic ..
A simple gear train is composed of three gears. Gear A os tje driver and has 8 teeth, gear B has 24 teeth, and gear C has 16 teeth. If gear A rotates at 60rpm, how fast is gear C rotating? If the output of torque at gear C is 150ft-lb, what is the in..
A particle moves along the x axis unset the influence of a stationary object. The force exerted on the particle is given bu F=8x^3, where f is in newton's and x is in meters. if x=0 is taken to be the zero of potential energy, then the potential e..
Compute an inductance of the sensor for air gaps
Two people carry a heavy electric motor by placing it on a light board 1.55 m long. One person lifts at one end with a force of 390 N, What is the weight of the motor
a 200 g block is dropped onto a relaxed vertical spring that has a spring constant of k 3.0 ncm. the block becomes
Two resistors (connected in series with each other) and a 18 Vbattery are connected in a loop. The voltage drop across the firstresistor is 7 V. What is the voltage drop across the secondresistor?
a cubic cardboard box of side a 0.430 m is placed so that its edges are parallel to the coordinate axes. there is no
After catching the ball, Sarah throws it back to Julie. However, Sarah throws it too hard so it is over Julie's head when it reaches Julie's horizontal position. What is the speed of the ball when it leaves Sarah's hand
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. What is the radius of a chamber
A light bulb emits light uniformly in all directions. The average emitted power is 150.0 W. At a distance of 4.50 m from the bulb, find out (a) the average intensity of the light, (b) the rms value of the electric field, and (c) the peak value of t..
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