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Every year, there is a foot race to the top of the Empire State Building. The vertical distance traveled (using the stairs!) is about 440 m. The current record for this race is about 9 min 30 s. If the record holder has a mass of 66 kg, what was his average power output during the race?
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A 30.0 g goldfinch lands on a slender branch, where it oscillates up and down with simple harmonic motion of amplitude 0.0489 m, What is the maximum speed of the goldfinch
find the center of mass of a uniform density cone. give your answer as a distance from the cone point, and as a fraction of the total cone height
An airplane flies at airspeed (speed relative to the air) 112 km/h, In what direction should the pilot head the plane and What would be the ground speed of the plane
A simple pendulum uses a steel wire as the "string." The length of this wire is 1.5 m at room temperature. What is the change in the period of the pendulum
A 1128 kg car and a 2210 kg pickup truck approach a curve on the expressway that has a radius of 272 m. A) At what angle should the highway engineer bank this curve so that vehicles traveling at 72.9 can safely round it regardless of the condition..
Assuming that the disks form a circular parallel plate capacitor and the electron are initially at rest when they pass through the first disk. A) determine the acceleration that the electrons undergo and B) the speed of the electrons as they pass ..
The index of refraction for violet light in silica flint glass is 1.65, and that for red light is 1.62. What is the angle of deviation for the red ray passing through a prism of apex angle
A swing is made from a rope that will tolerate a maximum tension of 6.44 x 102 N without breaking. What is the mass of the heaviest person
Air enclosed in a cylinder has density p = 1.4kg/m^3, What will be the density of the air if the length of the cylinder is doubled while the radius is unchanged
An airplane is cruising at an altitude of 10 km. Model the air as an ideal fluid to find the speed of the stream of air flowing through the leak
A certain spring has a spring constant k of 2.5 k N/m and is compressed by 50 cm. What is the muzzle velocity as the bullet leaves the barrel
A 5.0 kg textbook is raised a distance of 30 cm as a student prepares to leave for school. How much work did the student do on the textbook
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