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1. Consider two walls of a house that are identical except that one is made of 10-cm-thick wood, while the other is made of 25-cm-thick brick. Through which wall will the house lose more heat in winter?
2. What is a blackbody? How do real bodies differ from blackbodies?
A 20.0kg light signal hangs from the end of a 7.0m uniform density pole of mass 12.0kg. The pole is free to swivel from the hinge at point A, What is the reaction force (magnitude and direction) at the hinge
Two identical long wires of radius a = 2.90 millimeter are parallel and carry identical currents of i = 14.0 A in opposite directions. Find the inductance per unit length of the wires
The shear leg derrick is used to haul the 200-kg net of fish onto the dock. Determine the compressive force along each of the legs AB and CB and the tension in the winch cable DB.Assume the force in each leg acts along its axis.
Consider a volume of 4.8 cubic meters of gas initially at STP (0 degrees C and 1 atm pressure). what is the volume (in cubic meters) of the gas
The gas in an air cannon expands , from V1= 2.0-m3 to V2= 8.0-m3, while the pressure changes from P1= 6.0-atm to P1= 2.0-atm. If the heat supplied to the gas is 1.2 106-J and 1-atm = 1.013 105-N/m2, what is the change in the internal energy of the ga..
An electron of kinetic energy 1.56 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 21.8 cm. determine the circling frequency
A 0.230-kg block along a horizontal track has a speed of 1.50 m/s immediately before colliding with a light spring of force constant 48.2 N/m located at the end of the track. What is the spring's maximum compression
A star with the same mass and diameter as the sun rotates about a central axis with aperiod of about 28.4 days. What would be the new rotation period (s) of the star
At an outdoor market, a bunch of bananas is set into oscillatory motion with an amplitude of 20.0 cm on a spring with a force constant of 16.0 N/m. What is the weight of the bananas in newtons
An engine flywheel initially rotates counterclockwise at 5.39 rotations per second. Then, during 21.3 seconds, its rotation rate changes to 2.11 rotations per second clockwise. Find the flywheel\'s average angular acceleration (including its sign) in..
a lost shipping container is found resting on the ocean floor and completely submerged. the container is 5.9 m long 2.9
Write down a clear and complete expression (EQUATION!) for the magnetic field as a function of charge, velocity and displacement from the charge. Write down clear and complete expression (EQUATION!) for the magnetic field as a function current, le..
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