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a simple pendulum, 3 m in length, is released with a push when the support string is at an angle of 30 degrees force vertical. If the initial speed of the suspended mass is 1.2 m/s when at the release point, what is its speed at the swing.
A parachutist of mass 50kg jumps out of an airplane at a hight of 1000m. The parachute deploys, and he hits the ground with a velocity of 5m/s. Find the average resistance on the parachutist.
A person sitting quietly in a room on a winter day may lose heat primarily by radiation from the outer surface of her clothes to the walls of the room. what is the temperature of the outer surface of the clothes
You're driving down the highway late one night at 18 - {rm m}/{rm s} when a deer steps onto the road 45 -{rm m} in front of you. Your reaction time before stepping on the brakes is 0.50- {rm s}, and the maximum deceleration of your car is 11 {rm m..
At a dock, a crane lifts a 1200 kg container 30 m, swings it out over the deck of a frieghter, and lowers the container into the hold of the freighter, which is 10 m below the level of the dock. The acceleration of gravity is 9.8 m/s2. Neglect fri..
compute your apparent weight at the top of a Ferris wheel, given that the radius of the wheel is 7.1 , it completes one revolution every 30 , and your mass is 51 .
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate, What is the coefficient of kinetic friction between the ramp and the crate
In the figure, suppose that the separation between speakers A and B is 5.90 m and the speakers are vibrating in phase. They are playing identical 110-Hz tones, and the speed of sound is 343 m/s.
a 16.0 g bullet is shot into a wooden block at rest with mass 4550 h on a frictionless surface. the block moves 1.20 m/s after the bullet strikes and becomes lodged in the block, find the speed of the bullet before striking the block
A particle with a charge 3.2 x 10^-19 C is moving at a speed of 5x10^7 m/s that makes an angle of 40 degrees with respect to a uniform magnetic field B, Determine the magnetic field strength B
plan a picutre showing Mary's displacment due to rowing, her displacemnet due to the river's motion, and her net displacement.
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.53 m. A third charge of +2q is located on the x axis at such a place that the net electrostatic force on the charge at the origin doubles, its direc..
A copper pot sits on a hot plate that is at a remperature of 140 C, How long before one half the pots contents evaporate
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530, what is the angle of refraction for each wavelength
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