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A fighter pilot dives his plane toward the ground at400 m/s. He pulls out of the dive on a vertical circle. What is the minimum radius of the circle, so that the normal forceexerted on the pilot by his seat never exceeds three times his weight?
Two people hear a tornado siren, What is the intensity level (in dB) at the farther listener relative to the other listener
Water runs out of the horizontal drainpipe at the rate of 120 liters per minute. It falls 3.20 m to the ground. Assume the water doesn't splash up, what average force does it exert on the ground? (1 liter = 1 kg.)
Two ice skaters, Daniel (mass 70.0 ) and Rebecca (mass 45.0 ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, What is the magnitude of Daniel's velocity after the collision
What is a typical neutron star density
A total of 8.21·106 electrons are placed on an initially uncharged wire of length 2.27 m. What is the magnitude of the electric field a perpendicular distance of 0.974 m away from the midpoint of the wire? What is the magnitude of the acceleration of..
A proton is passing through a uniform, 0.500-T magnetic field and is directed along the x axis. find the pitch of the helix
Two sinusoidal waves of the same period, with amplitudes of 4.0 and 6.0 mm, travel in the same direction along a stretched string; they produce a resultant wave with an amplitude of 9.225 mm. The phase constant of the 4.0 mm wave is 0. What is the..
A proton of mass m is accelerated up to a kinetic energy K and then collides with a stationary proton at rest. All that is left after the collision is a new particle of mass M.
A certain type of laser emits light that has a frequency of 5.2 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7 x 10-11 s. How many wavelengths are there in one pulse.
Two waves travel in the same medium at the same speed. One has wavelength 0.0382 m and frequency 9.67×106 Hz. What is the period of the second wave
A 92-kg man's thighbone has a relaxed length of 0.55 m, a cross-sectional area of 6.8 10-4 m2, By how much does the thighbone compress
A wall is constructed of a 2 inch layer of fiberglass board (R = 8) and six inches of fiberglass batting (R = 19). If the temperature on the outside surface of the fiberglass board is 50degreesF and the temperature on the inside surface of the fiberg..
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