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A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. The soldier does 118 J of work in the process setting the bow/arrow combination and then releases the arrow. What is the speed of the arrow?
A passenger hanging onto a strap notices that an adjacent unused strap makes an angle of 14? to the vertical. What is the radius of the turn
white light falls normally on a transmission grating with 1000 lines per centimeter. At what angle will yellow light (550nm) emerge
At this point, person doing the laundry opens the lid, and a safety switch turns off the washer. The tub smoothly slows to rest in 11-s. Through how many revolutions does the tub turn while it is in motion.
A helicopter is ascending vertically with the speed of 8 m/s. At a height of 65m above the Earth, a package is dropped from a window.
A 2000 kg car is slowed down uniformly from 21.0 m/s to 6.00 m/s in 5.60 s.
A baseball player hits the ball and it lands in the field seat 10 m above the point, find the c and y components of the initial velocity vector of the baseball
Write an expression for the instantaneous voltage delivered by an AC generator supplying 120 V (rms) at 60 Hz
The electric field has been measured to be horizontal and to the right everywhere on the closed box. All over the left side of the box E1 = 120 V/m, and all over the right, slanting, side of the box E2 = 250 V/m. On the top the average field is E3..
A ballplayer standing at homeplate hits a baseball that is caught by another player at the same height above the ground from which it was hit. The ball is hit with an initial velocity of 21 m/s at an angle of 54° above horizontal.
A rock is thrown vertically upward with a speed of 17.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. What is the speed of the rock just before it strikes the ground
The electron in a hydrogen atom is in the first excited state, What is the quantum number n of the state into which the electron moves
A uniform disk of mass 0.70 kg and radius 7.0 cm is mounted in the center of a 10 cm axle and spun at 800 rev/min. The axle is after that placed in a horizontal position with one end resting on a pivot. The other end is given an initial horizontal..
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