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A cube of wood and a cube of concrete, each 0.17 m on a side, are placed side by side. One of the long faces of the rectangular prism formed by the two cubes is held at 17°C, and the opposite long face is held at 32°C. What is the total rate of heat transfer through the cubes?
An air-filled parallel-plate capacitor has plates of area 2.10 cm2 separated by 0.50 mm. The capacitor is connected to a 3.0 V battery. What is the charge on the capacitor
A common flashlight bulb is rated at 0.108 A and 3.28 V (the values of current and voltage under operating conditions). estimate the temperature of the tungsten filament when the bulb is turned on
Use the worked example above to help you solve this problem. A balloon contains 4.40 moles of a monatomic ideal gas. Find the work Wenv done by the gas in expanding the balloon
What is the frequency of the note played by this pipe.
Planet X rotates in the same manner as the earth, around an axis through its north and south poles, and is perfectly spherical. How long is the day on Planet X
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 1.5rad/s2. What is the tangential acceleration of the discus thrower at this point
The efficiency of a knife is 75%. If you push down on the knife with a force of 5 N to cut a piece of cake that is 6 cm thick, how much work is done on the cake
An 8kg mass is observed traveling with a speed of .08*c. What is the relativisitic momentum
A 70 kg crate is pushed at constant speed up the frictionless 35° ramp shown in the figure. What horizontal force F is required? What force is exerted by the ramp on the crate
a wheel of diameter 144 cm has an axle of diamter 15 cm. a force of 150N is exerted along the rim of the wheel. What force should be applied to the outside of the axle
A person wearing a seat belt can withstand an acceleration of -3.0 x 10^2 m/s^2. Explain how thick should barriers be to safely stop a car that hits a barrier at 110 km/h?
A straight wire in a magnetic field experiences a force of 0.029 N when the current in the wire is 2.5 A. What is the new current
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