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A 62-kg astronaut is in space, far from any objects that would exert a significant gravitational force on him. He would like to move toward his spaceship, but his jet pack is not functioning. He throws a 720-g socket wrench with a velocity of 5 m/s in a direction away from the ship. After 0.50 s, he throws an 800 g spanner in the same direction with a speed of 8 m/s. After another 9.90 s, he throws a mallet with a speed of 6 m/s in the same direction. The mallet has a mass of 1195 g. How fast is the astronaut moving after he throws the mallet?
estimate the sinking rate in water of a grain of sand that is 01 mm 100 um innbspdiameter. assume that the density of
A 800 kg car is travelling forwards at + 25 m s?1 along a level road. What is the acceleration during skidding
A spring with spring constant 19 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 2.5 and released. The ball makes 33 oscillations in 15 seconds. What is its utmost speed.
A 1.60 kg ball and a 7.20 kg ball are connected by an 80.0 cm long massless, rigid rod. The structure rotates about its center of mass at 320.0 rpm. What is the rotational kinetic energy of the structure?
he beaker has a mass 15 grams when its empty the beaker plus the liquid has a mass of 38 grams. the liquid has a volume
The buildup of plaque on the walls of an artery may decrease its diameter from 1.0cm to 0.85cm. Find the speed of blood flow within the plaque region
a cylindrical cable with 2.49 x 10-8 m resistivity carries a current of 1500 a. there is a potential difference of 1.8
The sun's intensity at the distance of the earth is 1370 W/m2. 30% of this energy is reflected by water and clouds; 70% is absorbed. What would be the earth's average temperature (in ?C) if the earth had no atmosphere
A mountain climber stands at the top of a 50m cliff hanging overa calm pool of water. What is the initial velocity of the second stone when it is thrown
An 800-N man stands halfway up a 5 m long ladder of negligible weight. The base of the ladder is 3 m from the wall as shown. suppose that the wall-ladder contact is frictionless, wall pushes against the ladder with a force of what magnitude.
Two 2.40cm--diameter disks spaced 1.90mm apart form a parallel-plate capacitor. determine the electron's speed as it left the negative plate
A 1.050 kg air-track glider is attached to each end of the track by two coil springs. Find the effective spring constant of the system
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