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A book is held between two hands and exerts force on book, which is perpendicular to book and horizontal. Book weights 31 Newton. The coefficient of static friction is 0.40. Find the magnitude of force to prevent the book from fallen?
During a workout, the football players at State U. ran up the stadium stairs in 60 s. The stairs are 150 m long and inclined at an angle of 30°. estimate the average power output on the way up
An FM radio station of frequency 96.7 MHz puts out a signal of 29900 W. How many photons per unit time are emitted
a small glider is placed against a compressed spring at the bottom of an air track that slopes upward at an angle of
A stream of singly ionized gold atoms pouring from a small oven impinges on a metal target. The target is attatched to the positive terminal of a 12V battery and oven is attatched to the negative terminal. How much kinetic energy do the ions pick up ..
Sean climbs a tower that is 84.7 m high to make a jump with a parachute. what is the potential energy of Sean
A certain heat engine does 8.5 kJ of work and dissipates 8.50 kJ of waste heat in a cyclical process. What was the heat input to this engine
A uniform, cylindrical pulley of mass M=12.7 kg and radius R=0.636 m rotates freely about a fixed horizontal axis. What is the magnitude of the angular acceleration of the pulley
a string of length 1.2m vibrates in 7 loops at a frequency of 70hz. show worka. what is the wavelength?b. at what
looking directly downward from a boat you see a shark that appears to be 4.5 m below the waters surface. whats the
A hand-pumped water gun is held level at a height of 0.84 m above the ground and fired. Find the gauge pressure of the water gun's reservoir
Estimate the minimum accelerating voltage required for an X-ray tube with a Fe26 anode to produce a Ka line
A thin cylindrical shell of infinite length and radius 2.60-cm hasa uniform surface charge density of 6.89-nC/m2. What is the magnitude of the electric field at a distance of 5.79-cm from the cylindrical shell?
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