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Show that the average energy of vibration decays according to the law : E= Eo × exp(-2bt).
An 82 kg lumberjack stands at one end of a 355 kg floating log. Both the log and the lumberjack are at rest initially. If the lumberjack now trots toward the other end of the log with a speed of 2.70 m/s relative to the log, what is the lumberjack's ..
A pendulum consists of a mass m = 0.080 kg hanging from a flexible string of length L. The string is very thin, very light, and doesn't stretch much, Find the period of the same pendulum on the moon's surface
How do you calculate the magnetic field strength in the center of Helmholtz coils
two balls of identical mass of 2.050 kg and with identical charges placed on them hang from the ceiling on identical
An office window has dimensions 3.4 m by 1.7 m. As a result of the passage of a storm, the outside air pressure drops to 0.95 atm, but inside the pressure is held at 1.0 atm.
A 75kg man standing on a scale in an elevator notices that as the elevator rises, the scale reads 825N. What is the acceleration of the elevator
A step-up transformer has 50turns on the primary coil and 500 turns on the secondary coil. what input currentand voltage are needed
A spaceship is observed by a stationary observer to be moving at .6 c. How fast does the laser beam travel relative to the observer
One end of a horizontal rope is attached to a prong of an electrically driven tuning fork that vibrates at a frequency 125Hz, What is the speed of a transverse wave on the rope
A car drives around a curve with radius 410 meter at a speed of 32m/s. The road is banked at 5 degree. the mass of car is 1400 kilogram. Calculate what is the frictional force on the car
A 2.1 kg solid sphere ( I= 0.4mR2 ) rolls along a horizontal surface with a speed of 7.8 m/s. What is the total kinetic energy of the sphere
a 80 kg student consumes 2500 cal each day and stays the same weight. one day he eats 3500 cal and wanting to keep from
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