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The potential difference between the surface of a 2.5cm -diameter power line and a point 1.6m distant is 4.1kV. What is the line charge density on the power line?
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad / s). what is the magnitude of the average angular acceleration of the disk
A 0.223 kg ball is thrown straight up from 1.81 m above the ground. Its initial vertical speed is 8.40 m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.
If the threshold frequency for platinum is 1.3x10^15 s^-1, what is the range of frequencies that do not eject an electron
two identical loudspeakers connected to a single audio amplifier are 5.0 m apart. the speakers at what spatial period does the intensity vary
The sound level of a single vacuum cleaner is about 75dB and a television is about 55dB. What is the sound level number
A 42 kg pole vaulter running at 11 m/s vaults over the bar. Her speed while she is above the bar is 0.7 m/s. Avoid air resistance, as well as any energy absorbed by pole, and determine her altitude as she crosses the bar.
A carnival merry-go-round rotates about a vertical axis at a constant rate. A man standing on the edge has a constant speed of 3.26 m/s, What is the magnitude of r vector
A 376 g oscillator has a speed of 116 cm/s when its displacement is 1.60 cm and 63.0 cm/s when its displacement is 6.70 cm
A bolt comes loose from underneath an elevator that is moving upward at a speed of 4.5 m/s. How high up was the elevator when the bolt came loose
How much work is needed to push a 137- kg packing crate a distance of 2.65 m up an inclined plane that makes an angle of 27 o with the horizontal, when inclined plane is frictionless
A hockey puck with mass 0.160 kg is at rest on the horizontal, frictionless surface of a rink. A player applies a force of 0.250 N to the puck, What are the position and speed of the puck at the end of that time
Suppose you pour water into a container until it reaches a depth of 18. What is the pressure at the bottom of the container
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