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A single square loop of wire 23.7 cm on a side is placed with its face parallel to the magnetic field between the pole pieces of a large magnet (which is another way of saying the vector normal to the face of the loop is perpendicular to the magnetic field). When 7.00 A flows in the coil, the torque on it is 0.305 m*N. What is the magnetic field strength?
Calculate the smallest amount of kinetic energy the electron must have in order to leave its circular orbit and move to infinity far from the proton
A 110 g copper calorimeter cup contains 190 cm3 of water and 45 g of ice, all in thermal equilibrium. find the mass of water before the hot iron is put into the cup
In a series circuit, a generator (1384 Hz, 14.4 V) is connected to a 17.1-? resistor, a 3.69-µF capacitor, and a 5.72-mH inductor. Find the voltage across each circuit element
You calculated a value of 0.49 s ± 0.04 s for the time constant from your graph. If you used a 1M?, what is the equivalent capacitance of your circuit
Monochromatic light with a wavelength of 362 nm passes through a single slit and falls on a screen 82 cm away. If the distance of the ?rst-order dark band is 0.49 cm from the center of the pattern, what is the width of the slit? Answer in units of cm
You have to do 2.2 kJ of work to push a 78-kg trunk 3.1 m along a slope inclined upward at 22 degrees , What is the coefficient of friction between trunk and slope
A certain type of laser emits light that has a frequency of 6.0 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.8 × 10-11 s. How many wavelengths are there in one pulse
A skier, weighing 453 n, is skiing down a slope that has an incline of 29 degrees above the horizontal. Compute the acceleration of the skier (coefficient of kinetic friction between the skis and snow is 0.21)
The drawing shows a triple jump on a checkerboard, starting at the center of square A and ending on the center of square B, What is the magnitude of the displacement of the colored checker during the triple jump
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 670 N and that of your belongings is 1030 N. Determine the work done by the elevator in lifting you
An electric motor operates at 6 volts. In order to lift a mass of 1 kilogram a distance of 2 meter in 3 seconds, how much current in amps must the motor draw? (Assume the motor is 100% efficient.)
1. how can you determine the activity of a radioactive source?2. do you expect efficiency to be good or bad for each of
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