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A rod, with sides insulated to prevent heat loss, has one end immersed in boiling water (T = 100degreesC) and the other end in a water-ice mixture. The rod has uniform cross-sectional area 7.05cm2 and length 87 cm. The heat conducted by the rod melts the ice at a rate of 1 gram every 11seconds. What is the thermal connectivity of the rod? (Recall that the heat of fusion of water is 3.34 x105J/kg)
On Planet X, the pressure at a depth of 2.00 m below thesurface of a liquid nitrogen lake, the pressure is5.00*10^5N/m^2. What is the atmospheric pressure at the surface of the lake
A big yo-yo (radius 0.2 meters, mass= 20 kg) has a string wrapped about its circumference. If yo-yo falls, how much time does it take to fall 10 m
A 3.00-liter aluminum cylinder at 5.00°C is filled to the brim with gasoline at the same temperature. If the aluminum and gasoline are warmed to 60.0°C, how much gasoline spills out
A 45.0 kg girl is standing on a 162 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
two protons are 3.0fm apart. 1fm 1 femtometer 1 x 10-15 m a. what is the magnitude of the electric force on one
a hydroelectric turbine generator produces an electric power of 20 mwmegawatts. water enters the turbine penstock at
a current of 24.0 ma is maintained in a single circular loop with a circumference of 2.70 m. a magnetic field of 0.520
two long charged thin-walled concentric cylinders have radii of 3.0 and 6.0 cm. the charge per unit length is 6.50 10-6
A wheel 2.20 m in diameter lies in a vertical plane and rotates about its central axis with a constant angular acceleration of 4.45 rad/s2. find the angular position of the point P
A 430 gram rock is whirled on the end of a string 45 cm long which will break under a tension of 22 N. What is the highest speed the rock can reach before the string breaks? (Neglect gravity.)
After a animal or plant dies, its 14C content decreases with a half-life of 5730 y. estimate what is the age of the ancient site
Light from the bottom of a swimming pool is incident on the surface at an angle of 20°. What is the angle of refraction
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