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A room with a pine ceiling measured 10 m x 6 m x 2 cm thick. On a cold day the temperature on inside of the ceiling is T1 = 24 oC and in the attic T2 = 7 oC. kpine = 0.120 J/msC kinsul = 0.042 J/msC Find the rate the heat is moving through the pine ceiling.
Relative to the ground, a car has a velocity of 16.8 m/s, directed due north, What is the magnitude of the truck's velocity relative to the ground
A skier (m = 63.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. Find the skier's total kinetic energy as she reaches the ground
You (height of your eyes above the water, 1.75) are standing 2.00 from the edge of a 2.50--deep swimming pool. You notice that you can barely see your cell phone, that went missing a few minutes before, on the bottom of the pool.
The springs of a 1600 kg car compress 5.0 mm when its 65 kg driver gets into the driver's seat. If the car goes over a bump, what would be frequency of vibrations.
A ranger in a national park is driving at 28.0 mi/h when a deer jumps into the road 225 ft ahead of the vehicle. After a reaction time t, the ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the most reaction time a..
The gravitational force between two masses M and m seperated by a distance r is 40 N. What is the new force when this distance is halved
A solar cell has a light-gathering area of 10 cm^2 and produces 0.2 A at 0.8 V (DC) when illuminated with S = 1000 W/m^2 sunlight. What is the efficiency of the solar cell
How long is the bridge? Write down an equation for the bridge's height. And how far from the center of the bridge are two points if bridge's height at those points is 80 meters.
Digital bits on a 12.0-cm diameter audio CD are encoded along an outward spiraling path that starts at radius R1=2.5cm, Determine the total length of the spiraling path
A copper pot with a mass of 0.485kg contains 0.175kg of water, and both are at a temperature of 20.0?C. Find the final temperature of the system
Mandy is walking at a speed of 1.37 m/s directly toward one siren and directly away from another siren when they both begin to sound with a frequency of 650 Hz
A spherical capacitor of inner radius 10 cm stores 10nC of charge when charged with 10V. Find s capacitance, its outer radius and the volume between the two spheres
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