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A 7 kg sled is initially at rest on a horizontal road. The sled is pulled a distance of 3.5 m by a force of 37 N applied to the sled at an angle of 30o to the horizontal. Find the change in the kinetic energy of the sled.
A parallel-plate capacitor is constructed using a dielectric material whose dielectric constant is 3.90 and whose dielectric strength is 1.80 multiply.gif 108 V/m. Find the minimum area of the capacitor plates
A dipole is located at the origin, and is composed of charged particles with charge +e and -e, separated by a distance 9 10-10 m along the y axis
An ore car of mass 4 000kg rolls downhill on tracks from a mine. At the end of the tracks, 10 m lower in elevation, is a spring with k = 400 000 N/m. How much is spring compressed in stopping the ore car? Ignore friction.
A uniform plank of length 4.30 m and weight 226 N rests horizontally on two supports, with 1.10 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 437 N walk on overhanging part of the plank be..
The potential difference across a resting neuron in the human body is about 70 mV, How much power does the neuron release
Matthew pulls his little sister Sarah in a sled on an icy surface (no friction) with a force of 60 N at an angle of 600 upward from the horizontal. Find acceleration of the sled
A standing wave is set up by reflecting radio waves from a large, flat metal dish. What is the frequency of the radio waves
A college student who was late for his physics class drove through a red traffic light, How fast did he need to drive for a Doppler shift this large
A 17 ?F capacitor is charged to 20 V and is then connected across a 11 mH inductor. What is the frequency of oscillation of the circuit
A rapidly spinning paddle wheel raises the temperature of 600mL of water from 21C to 25C. How much work is done in this process
What is the velocity of the ice skater after throwing the snowball. avoid friction and air resistance.
a skateboard with mass M rolls down a ramp, starting from rest. It takes a time T to roll a distance L along the ramp
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