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At the same time a stone downward at 10 m/s from the roof of a 60 m tall building another is stone is thrown upward at 35 m/s from street level. How high above the ground are the stones when they cross paths? What is the velocity of each stone when they cross paths? (It may help to make a plot of both stones flight.)
A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 360. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 91 dB. What would the sound intensit..
a heavy box of school books (mass is 50kg) was set down at rest on an inclined street (theta = 30 degrees). Draw a force Diagram of the box
You are on a cruise ship traveling north at a speed of 13.0 m/s with respect to land. If you walk north toward the front of the ship, with a speed of 2.7 with respect to the ship, what is your velocity with respect to the land
A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude
Two 9.0 cm--diameter metal plates are 1.2 cm apart are charged to 12.5 nC . They are suddenly connected together by a 0.218mm, What is the maximum current in the wire
An electron and proton move in circular orbits in a plane perpendicular to a uniform magnetic field B. Find the ratio of the radius of electron to the proton
What is the potential drop within the battery if the internal resistance is 4.3ohms and a current of 2.7 ampere is passed through it
A small steel wire of diameter 1.0mm is connected to an oscillator and is under a tension of 5.7N. What is the power output of the oscillator, assuming that the wave is not reflected back
Two kids decide to race from one end of a 20 meter long moving sidewalk to the other and back. Phillip runs on the sidewalk at 2.0 meters/sec (relative to the sidewalk). Who wins the race
A 500 kg mass is released at rest from a distance of two Earth radii above the surface of the Earth. Find the speed of the mass
In a popular amusement park ride, the rotating cylinder of radius 3.0 m is set in rotation at an angular speed of 7.0 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position.
Two cylinders, made from the same material and having the same length, have radii r1 and r2 with r1 > r2. Find the final angular velocity of the smaller cylinder
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