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Two balls with masses of 2.0 kg and 6.0 kg travel toward each other at speeds of 12 m/s and 4.0 m/s, respectively. If the balls have a head-on, inelastic collision and the 2.0-kg ball recoils with a speed of 8.0 m/s, how much kinetic energy is lost in the collision?
A parallel-plate capacitor is made of two flat metal plates pressed against a thin slab of dielectric material. What is the dielectric constant of the material that was initially used to fill the gap between the plates
A copper wire has a 25 m-ohmic resistance at 20 degrees C. When the wire is carrying a current, What is the change in the wire's resistance
A 2.0 cm x 2.0 cm parallel-plate capacitor has a 3.0 mm spacing.The electric field strength inside the capacitor is 1.1 x105 V/m. How much charge is on each plate
The rotor of an electric motor has rotational inertia Im = 7.59 x 10-3 kg·m2 about its central axis. The motor is used to change the orientation of the space probe in which it is mounted. The motor axis is mounted along the central axis of the probe;
A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.4 m/s and the tension in the rope is T = 14.9 N. How long is the rope
A dog running in an open field has components of velocity = 3.4 and = -1.9 at time = 10.4. For the time interval from = 10.9 to = 24.7, the average acceleration of the dog has magnitude 0.45 and direction 25.
A step-down transformer is used for recharging the batteries of portable devices. calculate rms output voltage of the transformer
One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. Determine the final speed of the two-object system
A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
A steel wire of length 2.02 with circular cross section must stretch no more than 0.210 when a tensile (stretching) force of 380 is applied to each end of the wire. What minimum diameter is required for the wire
Three capacitors numbered 1, 2 & 3, each have the same value of capacitance, What is the effective total capacitance
A stone tied to the end of a string is whirled around in avertical circle of radius R. Find the critical speed below which the spring would become slack at the highest point
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