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A 70 kg astronaut floating in space in a 110 kg MMU (manned maneuvering unit) experiences an acceleration of 0.029 m/s2 when he fires one of the MMU's thrusters.
(a) If the speed of the escaping gas relative to the astronaut is 490 m/s, how much gas is used by the thruster in 5.0 s?
(b) What is the thrust of the thruster?
What was the bullet's speed as it left the barrel. A 1kg block rests against one end of a horizontal spring which is compressed by 10 $cm$.
During the course of 0.130 s, the field is changed to one of 0.300 T pointing down. Illustrate what is the average induced emf in the coil?
Consider a swinging pendulum with length l= 10 cm, a mass of 1 gm swinging at the end of it with an amplitude, Calculate the total energy ( potential plus kinetic) in ergs of the swinging pendulum
At one instant, a mass (m = 2 kg) is at the location m and attached to one end of a spring with a spring constant ks = 60 N/m and a relaxed length L0 = 0.22 m. The origin is placed where the other end of the spring attaches to the ceiling.
A 1100 car traveling at a speed of 40 skids to a halt on wet concrete where = 0.50. How long are the skid marks.
A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 19.6° above the horizontal. How much work is done by the rope on the sledge
An iron brick measuring 200 mm / 20 cm / 0.05 m is submerged in pure water. (mass density 7860 kg/m^3/ weight 490 lb/ft/ specific gravity 7.86), What is the net force on the brick
A 11.0-g wad of sticky clay is hurled horizontally at a 130-g wooden block initially at rest on a horizontal surface. what was the speed of the clay immediately before impact
In one day, a 90kg mountain climber ascends from the 1520m level on a vertical cliff to the top at 2360m, What is her change in gravitational potential energy on the first day
question1a 100 kg of water in a closed insulated autoclave is heated from 20 to 90 degc by a heating coil made of 12 m
find the speed of the test charge. find the distance the car travels during this time in m.
A circuit contains a 150-? resistor, a 0.0530-H inductor, a 0.420-?F capacitor, and a source of time-varying emf connected in series. Determine the voltage drop across the inductor
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