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An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 128 kg. During a space-walk, the unit, which has been completely filled with propellant gas, ejects some gas with a velocity of +32 m/s. As a result, the astronaut recoils with a velocity of -0.29 m/s. After the gas is ejected, the mass of the astronaut (now wearing a partially empty propulsion unit) is 165 kg. What percentage of the gas propellant in the completely filled propulsion unit was depleted?
What are the two types of errors one encounters in experiments? Give an example of each, What does standard deviation of measured data tell you
Burning a pound of coal produces about 13,000 Btu of energy. How many megajoules of energy are produced by burning 4 pounds of coal?
A turntable rotates with a constant 2.00 rad/s2 angular acceleration. After 4.80 s it has rotated through an angle of 54.0 rad. What was the angular velocity of the wheel
a small object is 10 cm to the left of a converging lens f 5 cm and a second diverging lens f -3.3 cm is 5.8 cm to
A 650-kg car stopped at an intersection is rear-ended by a 1720-kg truck moving with a speed of 22 m/s. find the final speed of both vehicles after the collision
The first electron has the initial velocity v0 that makes an angle θ=45° with the lower plate and has a magnitude of 7.53×106 m/s. would this electron strike one of the plates? If so, what is the horizontal distance from the left edge? If not enter t..
Two tiny conducting spheres are identical and carry charges of -20.7 μC and +51.7 μC. They are separated by a distance of 2.39 cm. What is the magnitude of the force that each sphere experiences?
a werewoflf vaulting over a fence is spotted by some hunters. The hunters shoot a specially molded silver bullet and hit the creature in the shouldr. find the angular velocity of the werewolf after the collison
A harvest mouse can detect sounds as quiet as -10 . Suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby at the entrance to its nest. A very gentle breeze causes a leaf 1.8 from your head to rustle, generating a..
a steel wire 2.04 m long with a circular cross section must stretch no more than .260 cm when a 400.3 N weight is hung from one of its ends, what is the minimum diameter must this wire have
a 200kg ball is shot from a 2200kg cannon horizontally and positivly at 200m/s. what is the cannons speed, in respect of Earth
A box is put on a slide to move it from one part of a factory to another the slide is at an angle of 20 degrees below the horizontal the coefficient of friction between the box and slide is 0.352 what is the acceleration of the box.
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