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Two metal rods, one silver and the other gold, are attached to each other. The free end of the silver rod is connected to a steam chamber, with a temperature of 100°C, and the free end of the gold rod to an ice water bath, with a temperature of 0°C. The rods are 5.0 cm long and have a square cross-section, 2.0 cm on a side. How much heat flows through the two rods in 60 s? The thermal conductivity of silver is 417 W/(m·K), and that of gold is 291 W/(m·K). No heat is exchanged between the rods and the surroundings, except at the ends.
A string 1.3 m long with a mass of 3.9 g is stretched between two fixed points with a tension of 93 N. Find the frequency of the fundamental on this string
A parallel plate capacitor has plates of area 2.0x10^-3 m^2 and a plate separation of 1.0x10^-4 m. Determine the capacitance of this system if air fills the volume between the plates.
A 57.0 kg cheerleader uses an oil-filled hydraulic lift to hold four 130 kg football players at a height of 1.20 m. what is the diameter of the football players' piston
What is the highest possible induced emf in the antenna as it moves through the Earth's magnetic field.
A solid, uniform ball of mass 14.3 kg , and radius 0.21m , rolls without slipping up a hill of height 29.4m , How long is the ball in the air
An oil drop (density = 0.80 grams/cm3) has a diameter of 2.30 ?m. (This is about the size of a bacterium.) (A) Find the mass of the drop, What is the value of the electric field
The internal energy of a system increases by 500 J while 610 J of work are performed on it. What was the heat flow into or out of the system
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of 8.00 cm. how long does it take a ripple passing the cork to reach the shore
Calculate the capacitance of a planet, assuming it is a spherical capacitor of radius R = 9050.0 km with charge distributed throughout the volume of the sphere
A 2.40g bullet embeds itself in a 1.50kg block, which is attached to a spring of force constant 770 N/m. Find the time for the bullet-block system to come to rest
A charge of +2 x 10^-7 C is 10 cm from a charge of -6 x 10^-6 C. Find the magnitude and direction of the force on each charge
A flywheel comprises a uniform circular disk with a mass of 105.0 kg and a radius of 1.0 m. It rotates with an angular velocity of 1227 rev/min. What is the initial kinetic energy of the wheel
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