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The rate of heat conduction out of a window on a winter day is rapid enough to chill the air next to it. To see just how rapidly windows conduct heat, calculate the rate of conduction in watts through a 2.50 m2 window that is 0.605 cm thick if the temperatures of the inner and outer surfaces are 5.00oC and -10.0o, respectively. This rapid rate will not be maintained - the inner surface will cool, and frost may even form. give answer in watts.
an alien pilot of an intergalactic spaceship on a mission to measure the sizes of galaxies is traveling at 0.86c
What is the current in the element of an electric clothes dryer with a resistance of 9.6Ω when it is connected to 240 V? Express your answer to two significant figures and include the appropriate units.
lets say you take an ordinary wire coat hanger and straighten out the hook shaped part that normally hangs over the
Object A, which has a mass m and a velocity v0, collides head-on with object B, which has a mass 2m and a velocity 1/2v0. Following the collision, object B has a velocity of 1/4v0. (a) Determine the velocity of object A after the collision. v = ? If ..
Figure (a) shows an element of length ds =1.00 µm in a very long straight wire carrying current. The current in that element sets up a differential magnetic field dB at points in the surrounding space
Two point charges lie along the y-axis. A charge of q1 = -7 uC is at y = 6, and a charge of q2 = -6.5 uC is at y = -4 m. Locate the point (other than infinity) at which the total electric field is zero.
A parachutist bails out and freely falls 63 m. Then the parachute opens, and thereafter she decelerates at 1.6 m/s2. How long is the parachutist in the air
Sam is taking his girlfriend Sally out for a ride in his boat. He starts out at rest. He accelerates with an acceleration of 0.168 m/s^2 for 85.6 s. What is the total time the boat moves
The tension in a string by a linear mass density of 0.00100 kg/m is 0.490 N. What is the frequency of a sinusoidal wave on this string by a wavelength of 0.200m?
Illustrate energy bar graphs to solve the problem . What is amplitude of the oscillations.
A goalkeeper kicks a ball of mass 400 g in the air, which reaches a position of height 15.9 m above the ground corresponding to a horizontal distance 19.7 m from its initial position. What is the total work done on the ball
Three moles of ideal gas are in a rigid cubical box with sides of length 0.470m . Part A What is the force that the gas exerts on each of the six sides of the box when the gas temperature is 21.0 deg C? Part B What is the force when the temperature o..
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