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A rocket of total mass M, contains fuel of mass m. Thus the rocket without any fuel would have a mass of M-m. The fuel is discharged as exhaust gasses with an average speed v (relative to the earth). How fast will the rocket be traveling when the fuel is used up? Neglect gravity and air resistance.
A firefighter a distance d from a burning building directs a stream of water from a fire hose at angle ?i above the horizontal, at what height h does the water strike the building
Coherent light of frequency 6.40×1014Hz passes through two thin slits and falls on a screen 89.0cmaway. How far apart are the two slits
A particle of mass 7.22 x 10^-27 kg, moving at 7.06 x 10^5 m/s, strike an identical particle which is initially at rest. calculate the final speeds of the particles
A snowboarder of mass 82.0 kg (including the snowboard's mass) slides straight down a "double black diamond" hill. The hill is 45 metres in length and inclined at 40° below the horizontal. Determine the work done by the normal force
A major leaguer hits a baseball so that it leaves the bat at a speed of 30.0 m/s and at an angle of 36.9o above the horizontal. Calculate the horizontal and vertical components of the baseball's velocity
Conservation of energy tells us that energy cannot be created or destroyed. Clearly, energy is required for radioactivity to occur. Where is this energy coming from?
A proton and an alpha particle are released from rest when they are 0.225nm {\rm nm} apart. Find the maximum speed of proton
q1. for an ideal atwood machine has a massless pulley of radius 10 cm which moves without friction and has masses of 2
A light ray is traveling toward an interface between sapphire, n= 1.76, and water, n= 1.33. What is the critical angle for total internal reflection
A ring of diameter 11.00 cm is fixed in place and carries a charge of +5.00 µC uniformly spread over its circumference. What is the maximum speed it will reach
A 1200 kg car is moving with a velocity of 20 m/s when the brakes are applied uniformly, Find the braking force on the car by finding the acceleration of the car
Two balls, each with a mass of 0.871 kg, exert a gravitational force of 8.23 × 10?11 N on each other. How far apart are the balls
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