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A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 2.3 mm. Treat the wall as a slab of the insulating material Styrofoam whose area and thickness are 20.00 m2 and 0.120 m, respectively. Heat is lost via conduction through the wall and the window. The temperature difference between the inside and outside is the same for the wall and the window. Of the total heat lost by the wall and the window, what is the percentage lost by the window? (The thermal conductivity for glass window is kG = 0.80 J/(s·m·C°), and the thermal conductivity for Styrofoam is kS = 0.010 J/(s·m·C°).)
Joe is 0.500 m from the right end and weighs 920-N. Given that the scaffold is in rotational and translational equilibrium, what are the forces on each cable.
Two blocks connected by a string are on a horizontal frictionless surface, How much time is required for the hanging weight to fall 10.0 cm if it starts from rest
The impact on light fixture swing
A coin placed on a turntable rotating at 34.1 rev/min will stay there if its center is placed no further than 10.0 cm from the axis of rotation, What is the coefficient of friction between the coin and turntable
A 0.360 kg pendulum bob passes through the lowest part of its path at a speed of 2.86 m/s, When the pendulum reaches its highest point, what angle does the cable make with the vertical
A 38.0 kg box initially at rest is pushed 4.00 m along a rough, horizontal floor with a constant applied horizontal force of 125 N. determine the final speed of the box
If the initial temperature of the horseshoe is 450 °C, and the initial temperature of the water is 45° C, what is the equilibrium temperature of the system? Presume no heat is exchanged with the surroundings.
At a distance of 6.0 km from a radio transmitter, the amplitude of the oscillating electric field of the radio wave is Eo=.13 V/in, What is the time-averaged energy flux
what is the linear speed of the fishing line. The force exerted by the wind on the sails of a sailboat is 300 N north. The water exerts a force of 150 N east. If the boat (including its crew) has a mass of 300 kg, what are the magnitude and directi..
An 82 g arrow is fired from a bow whose string exerts an average force of 95N on the arrow over a distance of 77.00 cm. What is the speed of the arrow as it leaves bow.
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 680m to be the other plate.
Calculate the angle between the lines (in degrees). Use the angle in the +y direction from the crossing point. (All distances are in meters.)
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