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Look at Figure 27.9 of your text, replace the resistor on the left with a perfectly conducting wire, and suppose the sliding conducting bar has resistance R=4.20m Omega and is made of copper and has a cross sectional area of A=4.00 (mm)^2, a length of [=999 mm, and a number density of n= 1.1x1029 mobile electrons per m3. Suppose you slide the bar to the right at 1.00mm/s through a field of strength 1.00 mT.
a) Given that there are 2.46x10^30 protons per m3, find the magnetic force the protons feel.
b) Given that there are 2.35x10^30 nonmobile electrons per m^3, find the magnetic force they feel.
c) The total force above is all in the up/down direction, and makes the bar press against the top bar until they compress enough to get an equal and opposite force pushing the bar back. What is the net force on the body of the bar from the compression against the top bar?
d) What is the rate of change of the magnetic flux?
e) What is the motional EMF associated with the changing magnetic flux?
A Federation starship ( 2.10×106kgkg ) uses its tractor beam to pull a shuttlecraft ( 2.10×104kgkg ) aboard from a distance of 15.0kmkm away. The tractor beam exerts a constant force of 4.0×104N4.0 \times 10^{4}\;{\rm N} on the shuttlecraft. Both spa..
A basketball player makes a jump shot. The 0.700-kg ball isreleased at a height of 1.80 m above the floor with a speed of 7.00m/s. What is the work done on the ball by air resistance
The reflected sound is afterwards mixed with the transmitted sound, and 85 beats per second are detected. The speed of sound in body tissue is 1520m/s. compute the speed of the fetal heart wall at the instant this measurement is made.
Suppose you wish to make a solenoid whose self-inductance is 1.7 mH. How many turns of wire are needed
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A 10.2-g bullet is fired into a stationary block of wood having mass m = 4.92 kg. The bullet imbeds into the block. What was the original speed of the bullet
Describe how she investigates which of the two surfaces is the best absorber of heat radiation.
To finance her community college education, Joanna takes out a Stafford loan for $4500. How much will she pay
a wheel accelerates at a constant rate from 30 rpm to 90 rpm turning through 8.00 radians in the process. two persons
The model airplane in Figure 5.7 is flying at a speed of 13.2 m/s on a horizontal circle of radius 17.9 m. The mass of the plane is 1.18 kg. What is the net work done on the plane
A fireman 46.0 m away from aburning building directs a stream of water from a ground-level firehose at an angle of 30.0° above the horizontal. If the speed of thestream as it leaves the hose is 40.0 m/s, at what height will the stream of water strike..
A hand-driven grinding wheel is a uniform 62-kg disk with a 41-cm radius. It has a handle of negligible mass 64 cm from the rotation axis. Find the maximum angular velocity of the wheel
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