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A farsighted person has a near point located 210 cm from the eyes. Find the focal length of the converging lenses in a pair of contacts that can be used to read a book held 25 cm from the eyes.
A group of hikers hear an echo 2.50 s after they shout. If the temperature is 28°C, how far away is the mountain that reflected the sound wave.
High voltage power lines are a familiar sight throughout the country. Find the resistance of ten kilometers of this wire
You're in traffic court, arguing against a speeding citation. You entered a 220-m-radius banked turn designed for 81km/h, which was also the posted speed limit. The road was icy, yet you stayed in your lane, so you argue that you must have been going..
A sinusoidal wave traveling on a string is moving in the positive x-direction. The wave has a wavelength of 3 m, a frequency of 70 Hz, What is the wave function for this wave
A child throws a snowball over a wall. The horizontal distance which the snowball travels is 3.83 m. Determine the initial speed of the snowball
A boy tosses a ball in the vertical direction off the side of a cliff. if the initial velcoity of the ball is 15 m/s upward, determine the maximum height sb reached by the ball
If the length of the field between goal lines in the Earth frame is 85.2 m, what length is measured in the rest frame of the particle
A record was set for stair climbing when a man ran upthe 1600 steps of the Empire State Building in 10 minutes and 59secs. what was his average power output during the limb
An 75 kg stuntman jumps from a window of a building situated 25 m above a catching net. Assuming air resistance exerts a 100-N force on the stuntman as he falls; decide his velocity now before he hits the net.
A small solid sphere, with radius 0.25 cm and mass 0.56 g rolls without slipping on the inside of a large fixed hemisphere with radius 15 cm, What is its kinetic energy at the bottom
When the cannon is fired, the ball moves 15.3 cm through the horizontal barrel of the cannon, and there is a constant frictional force of 0.0322 N between the barrel and the ball. Illustrate at what point does it have its max speed?
A canoe has a velocity of 0.54m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.52m/s east relative to earth.
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