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Two point charges are located on the x axis. The first is a charge +Q at x = ?a. The second is an unknown charge located at x = +3a. The net electric field these charges produce at the origin has a magnitude of 2kQ/a2. What are the two possible values of the unknown charge?
A basketball player makes a jump shot. The 0.607 kg ball is released at a height of 1.97 m above the floor with a speed of 7.22 m/s, What is the work done on the ball by air resistance
Two bars of identical mass are at 29 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J/ (kg • C°).
A solenoid of length 4.0 cm and diameter 0.93 cm is wound with 165 turns per cm. What is the induced emf in one of the windings
What will be the vertical position of the boat. In the frame of reference of the truck, at what angle to the vertical does the boy throw can.
A stone is thrown off of a cliff top with a velocity of 9.5 m/s at a 30 degree angle below the horizontal. What is the stones total speed at that point
A painter (mass = 55.7 kg) climbs 3.28 m up a 7.16 m long ladder leaning against a frictionless wall. The ladder has a mass of 16.2 kg, find Friction force between the ladder and the ground
A planet orbits a star, in a year of length 4.58 x 107 s, in a nearly circular orbit of radius 2.85 x 1011 m. With respect to the star, determine the angular speed of the planet
A 0.17- kg block on a wooden table is given a sharp blow with a hammer. The block then slides across the table to a stop. How far does the block go
A student standing on a stationary skateboard tosses a textbook with a mass of mb = 2 kg to a friend standing in front of him. What is the magnitude of the velocity of the book
A rigid, well insulated container contains 10 kg of water. A motor connected to a paddle wheel is used to stir the water at a rate of 100 rad/s. How much toque does the motor need to supply (in N-m) in order for the water to heat up by 10?C in one..
The mass of a space shuttle is approximately 2.0x10^6 kg. Throughout lift-off, the net force on the shuttle is 1.0x10^7 newtons directed upward. What is the speed of the shuttle 10 seconds after liftoff.
A long solenoid (cross-sectional area = 0.85 x 10-6 m2, number of turns per unit length = 1878 turns/m) is bent into a circular shape so it looks like a doughnut, Find the emf induced in the toroid
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