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Due to thermal motion, the electrons at room temperature are randomly traveling to and fro at 1.12 × 105 m/s, even without any current. Find what fraction is the current drift speed, compared to the random thermal motion?
A jogger takes 49 minutes to run 22 times around a track that measures 0.25 mile. What is her average velocity in mph and m/s
you hang a heavy ball with a mass of 12 kg from a gold wire 2.6 m long that is 2 mm in diameter. you measure the
A Porsche 944 Turbo has a rated engine power of 217hp . 30% of the power is lost in the drive train, and 70% reaches the wheels. What is the maximum acceleration of the Porsche on a concrete surface where
a spherical void of radius r has cut inside the sphere, find the electric field inside the void if its center is displaced by vector R
Two balls are approaching each other head-on. Their velocities are +14.6 and -8.88 m/s. Determine the velocity of the center of mass of the two balls
Radar is utilized to scan for airplanes near an airport. If an airplane is 13 km from the airport, what is the round-trip travel time for the electromagnetic wave utilizing with the radar system?
A point source of light is submerged 2.5 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
When two unknown resistors are connected in series with a battery, the battery delivers 235 W and carries a total current of 5.00 A. Determine the values of the two resistors
A parallel plate capacitor is attached to a battery that supplies a constant voltage. What happens to the energy stored in the capacitor
A 12.0 kg box is pulled along a horizontal surface by a force Fp at a 30° angle above the horizontal. Calculate the acceleration of the box assuming a force of magnitude 45 N is applied at the 30° angle
A block of wood floats in fresh water with two-thirds of its volume V submerged. Find the density of the wood and the liquid
A 8.51 -m ladder with a mass of 21.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 245 N. What is the net torque acting on the ladder
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