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Q. Three equal point charges, each with charge 1.50, are placed at the vertices of an equilateral triangle whose sides are of length 0.550. What is the electric potential energy of the system? (Take as zero the potential energy of the three charges while they are infinitely far apart.)
Use = 8.85×10-12 for the permittivity of free space.
Rank the vector combinations on the basis of their angle, measured counter clockwise from the positive x axis. Vectors parallel to the positive x axis have the angle of 0. All angle measures fall between 0 and 360.
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision and are going 10 m/s after the collision. If they skid for 5.4 seconds before stopping, how far did they skid?
A flywheel in a motor is spinning at 580 {rm rpm} when a power failure suddenly occurs. The flywheel has mass 40 {rm kg} and diameter 75 {rm cm}.
A 770 kg car moving at 21 m/s brakes to a stop. The brakes contain about 15 kg of iron, which absorbs the energy. What is the increase in temperature of the brakes.
A 17g rifle bullet travelling 220 m/s buries itself in a 3.90 kg pendulum hanging on a 3m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of the pendulum's displacement.
An object is 22 cm in front of a diverging lens that has a focal length of -13 cm. How long in front of the lens should the object be placed so that size of its image is reduced by a factor of 4.
What is the difference between voltage current characteristics for intrinsic and extrinsic semiconductor in both forward in addition to reverse direction.
What are the velocities of the two people after the snowball is exchanged? Disregard friction between skate and the ice.
Two charged spherical conductors are connected by a long conducting wire, and a charge of 15 μC is placed on the combina- tion. One sphere has a radius of 4.05cm and the other a radius of 6.05cm.
A hot wheels track has a spring loaded launcher. A 100g car is pushed into the launcher, which compresses the spring by 2cm. The cars initial velocity after launching is 3m/s.
What was the bullet's speed as it left the barrel. A 1kg block rests against one end of a horizontal spring which is compressed by 10 $cm$.
Decide about the validity of Ampere's Law. Ampere's Law is valid.
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