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Q. A wire is formed into a circle having a diameter of 10.0 cm and placed in a uniform magnetic field of 3.00 mT. The wire carries a current of 5.00 A. Find (a) the maximum torque on the wire and (b) the range of potential energies of the wire-field system for different orientations of the circle.
Q. A bullet of mass 5.00 g is fired horizontally into a wooden block of mass 1.26 kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.160. The bullet remains embedded in the block, which is observed to slide a distance 0.290 m along the surface before stopping. What was the initial speed of the bullet?
An alpha particle (m = 6.7 ´ 10-27 kg, q = +3.2 ´ 10-19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out an electric potential difference V..
A baseball (m = 155 g) approaches a bat horizontally at the speed of 40.5 m/s (91 mi/h) and is hit straight back at a speed of 45.5 m/s (102 mi/h).
Dan is gliding on his skateboard at 2.00m/s. He rapidly jumps backward off the skateboard, kicking the skateboard forward at 8.00m/s (as measured by an observer on the ground). Dan's mass is 60.0kg and the skateboard's mass is 7.00kg.
Make a drawing of this situation, and choose the best axes for x and y so that you have the least number of components.)
find the magnitude of the initial acceleration. At what height above the surface of the earth does the balloon have a speed of 7.30 m/s.
A rectangular block of ice 9.00 m on each side and 0.7 m thick floats in sea water. The density of the sea water is 1025kg/m3. The density of ice is 919kg/m3. How high does the top of the ice block float above the water level.
A basketball player grabbing a rebound jumps 73.3 cm vertically. How much total time (ascent and descent) does the player spend (a) in the top 13.1 cm of this jump and (b) in the bottom 13.1 cm? Do your results explain why such players seem to han..
At a right angle to a magnetic field. The acceleration of gravity is 9.81 m/s2. What is strength of the magnetic field necessary to exactly balance the weight of the proton and keep it moving horizontally.
A gun shoots bullets that leave the muzzle with a speed of 336 m/s. If a bullet is to hit a target 136 m away at the level of the muzzle, the gun has to be aimed at a point above the target. How far above the target is this point.
A 3 kg object id released from rest at a height of a 5 meter curved frictionless ramp. At the foot of the ramp is a spring force constant of k= 400n/m the object slides down the ramp and onto the spring compressing it to the distance x before comi..
Suppose one gallon of gasoline produces 1.1 multiplied by 108 J of energy, and this energy is enough to operate a particular car for 26 miles.
After the NEAR spacecraft passed Mathilde, on some occasion's rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid Eros, final destination for the mission.
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