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The external wall of a room in a house has a cross-sectional area of 34.13 m2. The convective heat transfer coefficients for the inside air are 8.77 Wm-2 0C-1. It is desired for the room to have a temperature of 23.740C and the external temperature to be 0 0C. The heater in the room is capable of supplying heat at a steady rate of 934 W.
Find the temperature for the internal surface of the wall, in 0C, giving your answer to 3 decimal places.
An object with mass m1 = 3.20 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley, Find the magnitude of the acceleration of each object
Assume now that the angular velocity of the tire, which continues to roll without slipping, is not constant, but rather that the tire accelerates with constant angular acceleration α. Find αx, the linear acceleration of the tire. Express your answe..
An electromagnetic wave in vacuum has an electric field amplitude of 220 V/m. Calculate the amplitude of the corresponding magnetic field
In a bicycle, the pedals drive the chain wheel, which is connected by means of a chain to the cogwheel, a small wheel attached to the rear wheel. In a certain bicycle, the radius of the chain wheel is 12.0 cm, the radius of the cogwheel is 4.0 cm, an..
what is the coefficient of thermal expansion for a substance that was originally 2 m long at 20 degrees C and expants to 2.0002 m at 40 degrees C
Calculate the mass of a proton (m=1.67E-27kg) whose kinetic energy id one third its total energy
A 2.0 kg mass traveling at 3.0 m/s strikes another 2.0 kg mass traveling at -1.0 m/s. They collide and have a complete elastic collision. what does the first mass do
The Millenium Falcon is chased by the Imperial Forces. The ship is moving at a speed of 0.615 c. What is the velocity of the protons in the resting frame when the cannon is shot in the backward direction
A slide loving pig slides down a certain 40 degree slide in twice the time it would take to slide down a frictionless 40 degree slide. Find the coefficient of kinetic friction between slide and pig
An RL circuit with L = 6.00 H and an RC circuit with C =6.00 µF have the same time constant. Determine what is this common time constant
Find the horizontal component of the final velocity vx, in meters per second, after the collision. Find the vertical component of the final velocity vy, in meters per second, after the collision.
Charge Q=+ 3.00 µC is distributed uniformly over the volume of an insulating sphere that has radius R = 3.00cm. What is the potential difference between the center of the sphere and the surface of the sphere
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