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Q. Two indentical spheres each has mass m and carries a charge q, are suspended from the ceiling. The electrostatic repulsion keeps the two spheres apart. What is the angle?
Q. The velocity of a particle moving in the xy plane is given by = (5.5t - 4.5t2)i + 8.3j , with in meters per second and t (> 0) in seconds. At t = 1.8 s and in unit-vector notation what positive time does the speed equal 10 m/s?
Two charged balls are 20.0 cm apart. They are moved, and force on each of them is tripled. How far apart are they now.
Calculate the y-component of the magnetic force.
A thin copper rod 1 m long has a mass of 50 g. What is the minimum current in the rod that would allow it to levitate above the ground in a magnetic field of magnitude 0.100 T.
A steel aircraft carrier is 364m long when moving through the icy North Atlantic at a temperature of 2.4°C. By how much does the carrier lengthen as it is traveling in the warm Mediterranean Sea at a temperature of 21° C.
What is the number of conduction electrons. A centrifuge rotor has a moment of inertia of 3.40 x10-2 kg·m2. How much energy is required to bring it from rest to 8000 rpm.
How fast (in ) must a centrifuge rotate if a particle 5.4 from the axis of rotation is to experience the acceleration of 300000 's.
A 9.22 kg ball, hanging from the ceiling by the light wire 145.00 cm long, is struck in an elastic collision by a 1.20 kg ball moving horizontally at 6.46 m/s just before the collision.
If the balloon is 24.9 cm in diameter when child loses it, what is its diameter at an altitude of 1510 m? Assume that the balloon is very flexible and so surface tension can be neglected.
A more realistic car would cause the wheels to spin in a manner that would result in the ground pushing it forward with a constant force (in contrast to the constant power in Part A). If such a sports car went from zero to 30.0 in time 1.10 , how ..
What value does this give for the speed of sound in air. What is the speed of the ball at that point.
What is the least speed the block must have at the top of the loop to make it around the loop-the-loop without leaving the track
An alpha particle (m = 6.7 x 10^-27kg, q = +3.2 x 10^-19C) has a speed of 30km/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 the electric potential difference.
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