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Question: A ping-pong ball covered with a conducting graphite coating has a mass of 5.40 x 10-3 kg and a charge of 9.50 µC. What electric field directed upward will exactly balance the weight of the ball? (g = 9.8 m/s2)
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An airplane is flying with a speed of 305 km/h at a height of 3750 m above the ground. How much energy was dissipated on the parachute by the air friction
The axle of a wheel is mounted on supports that rest on arotating turntable as shown in the figure. The wheel has angularvelocity ω1 = 44.0 rad/s about its axle, and the turntablehas angular velocity ω2 = 35.0 rad/s about a vertical axis.
A constant net force of 410 N is applied upward to a stone that weighs 32 N. The upward force is applied during a distance of 2.0 m, and the stone is then released. To what height, from the point of release, will the stone rise?
A block of mass 2.50 kg is pushed 2.20m along a frictionless horizontal table by a constant 18.0 N force directed 25.0° below the horizontal.
At time t = 0 s, a wheel has an angular displacement of zero radians and an angular velocity of +15 ras/s. The wheel has a constant acceleration of -0.45 rad/s2. In this situation, the maximum value of the angular displacement, in rad, is closest to:
A 0.15g honeybee acquires a charge of 22pCwhile flying. The electric field near the surface of the earth is typically 100N/C, What is the ratio of the electric force on the bee to the bee's weight
a 0.144 kg baseball is moving towards home plate with a speed of 43.0 ms when it is bunted. the bat exerts an average
A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. 3.2 Joule of work is required to compress the spring by 0.12 meter. Determine what the value of the mass
Top professional pitchers can throw fastballs at speeds of100mph. Given that 1 mph=0.447m/s. WHat is this speed in meters per second
A sled slides without friction down a small, ice-covered hill. If the sled starts from rest at the top of the hill, its speed at the bottom is 9.00 m/s. Evaluate the speed of the sled at the bottom of the hill after the second run
In an oscillating LCcircuit, when 86.0% of the total energy is stored in theinductor's magnetic field, what multiple of the maximum current is in the inductor
a small current loop of area a 0.0008 m2 and moment of inertia i 6.9e-07kgm2 carries a currentnbsp i 0.0039a with
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