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A metal rod of mass .22kg lies across two parallel conducting rails that are a distance of .52 m apart on a tabletop. A 3.0 Ω resistor is connected across the left ends of the rails. The rod and rails have negligible resistance however significant friction with a coefficient of kinetic friction of .20. There is a magnetic field of .80T perpendicular to the plane of the tabletop. A string pulls the metal rod to the right by a constant speed of 1.8 m/s. Compute the magnitude of the current induced in the loop formed by the rod, the rails, and the resistor. Compute the magnitude of the force required to pull the rod to the right with constant speed. Compute the energy dissipated in the resistor in 2 sec. Compute the work done by the string pulling the rod in 2sec. Contrast your answers to parts c and d. Provide a physical explanation for why they are equal or unequal.
On a cold day, Ming rubs her hands together to warm them up. She presses her hands together with a force of 4.1 N. by how much has the internal energy of her hands increased
You have a grindstone ( a disk) that is 80.0 kg, has a .349-m radius, and is turning at 104.0 rpm, Calculate the angular acceleration of the grindstone
A copper ball with a radius of 1.47 cm is heated until its diameter has increased by 0.198 mm. Assuming an initial temperature of 21.3°C, calculate the final temperature of the ball
A tuning fork of unknown frequency makes 5 beats per second with a standard fork of frequency 377 Hz. The beat frequency decreases when a small piece of wax is put on a prong of the first fork. What is the frequency of this fork?
Consider two long straight parallel wires, each carrying 5 amps. These wires are 0.04 m apart. What is the magnitude of the magnetic field half way between these two wires
A merter stick pivoted at its center has a 100gm mass suspended at its 20cm mark. Where should an 80gm mass be placed to produce equilibrium
What is the range of wavelengths for FM radio (88 MHz to 108 MHz), What is the range of wavelengths for AM radio
When a large bone such as the femur is broken, the two pieces are often pulled out of alignment by the complicated combination of tension, how much mass m must be attached to the bottom pulley
A refracting telescope has an objective lens of focal length 16.0in and eyepieces of focal lengths 12.0mm, What are the largest and smallest angular magnifications
A nonreflective coating (n = 1.31) covers the glass (n = 1.52) of a camera lens. determine the minimum nonzero thickness that the coating can have
It is possible for a muon to be captured by a proton to form a muonic atom. A muon is identical to an electron except for its mass, Calculate the magnitude of the lowest energy state
A certain gasoline engine has an efficency of 30% what would the hot resevoir temp be for a carnot engine having that efficency if it operates with a cold resevoir temp off 200C
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