Magnitude of the momentum changed
The kinetic energy of a rocket is increased by a factor of eight after its engines are fired, whereas its total mass is reduced by half through the burning of fuel. By what factor is the magnitude of its momentum changed? Hint: Use KE = p2/2m.
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By how much vertical distance does the ball clear the crossbar?
Determine the breakdown voltage for an argon filled chamber having electrode separation of 0.3 cm and first Townsend coefficient of 100 cm^-1 at STP. What will be the breakdown voltage if the gas in the chamber is replaced by helium?
A tiger leaps horizontally from a 7.7 {rm m}-high rock with a speed of 3.0 {rm m/s}. How far from the base of the rock will she land?
A shot-putter throws the shot ( mass = 7.3 {rm kg}) with an initial speed of 15.0 {rm m/s} at a 36.0{rm ^circ} angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.10 {rm
A 40.0-N crate starting at rest slides down a rough 6.00-m-long ramp, inclined at 30.0° with the horizontal. The magnitude of the force of friction between the crate and the ramp is 6.0 N. What is the speed of the crate at the bottom of the in
In a game of billiards, a red billiard ball is traveling in the positive x-direction with speed v and the cue ball is traveling in the negative x-direction with speed 3v when the two balls collide head on. Which statement is true concerning their
A rifle with a barrel length of 60 cm fires a 12 g bullet with a horizontal speed of360 m/s. The bullet strikes a block of wood and penetrates to a depth of 11 cm. How long does it take the bullet to come to rest?
The force exerted by the wind on the sails of a sailboat is Fsail = 380 N north. The water exerts a force of Fkeel = 200 N east. If the boat (including its crew) has a mass of 260 kg, what are the magnitude and direction of its acceleration?
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