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It takes an elevator 3.9 minutes to raise a vehicle with a weight of 4479 N from the floor to a height of 9 meters. What size (power) motor (in watts) does it take to do the job?
A simple pendulum of length 2.00 m and mass 0.425 kg has a spring of force constant 88.0 n/m attached a distance h = 1.2 m from the point of suspension. determine the period of small oscillation.
A grating that has 3600 slits per cm produces a third-order fringe at a 22o angle. What wavelength of light is being used? Express your answer to two significant figures and include the appropriate units.
A 12.5-µC particle with a mass 2.80x10-5kg moves perpendicular to a 1.01-T magnetic field in a circular path of radius 21.8m. How fast is the particle moving
The upward normal force exerted by the floor is 610 N on an elevator passenger who weighs 660 N. What is the reaction force to weight of the passenger
A stretched string fixed at each end has a mass of 50 g and a length of 7.2 m. The tension in the string is 47 N. What is the vibration frequency for this harmonic?
A ball of mass m = 1.9 kg is released from a height of h = 2 m into a tank of water. At a time of t = 1.13 s after striking the surface of the water, the ball's velocity has decreased by 50%. What is the magnitude of the average force the ball exp..
When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.740 m/s2, What is the coefficient of kinetic friction between block 2 and the table
Figure shows two observers 20 m apart, on a line that connects them and a spherical light source. If the observer nearest the source measures a light intensity 80% greater than the other observer, how far is the nearest observer from the source?
A Porsche 944 Turbo has a rated engine power of 217 . 30% of the power is lost in the drive train, and 70% reaches the wheels. what is its speed when it reaches maximum power output
A graph represents the displacement of a box (m = 0.75 kg) attached to a spring. The period is 0.92 seconds and the angular frequency is 6.8 radians/second. If the maximum speed of the box is 5.25 m/s, what is the displacement of the box when a ti..
A family ice show is held at an enclosed arena. The skaters perform to music with level 85.0 dB. What is the combined sound level
A typical adult human lung contains about 330 million tiny cavities called alveoli. Assume the alveoli are spherical and a typical human lung is about 1.95 liters. Estimate the average diameter of a single alveolus
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