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An astronaut living at a space station is in a constant state of free fall- the only force exerted on her and on the space station is the gravitational force due to the Earth. How can an astronaut determine her mass while on an extended stay in space? One method involves vibrational motion. An astronaut sits on a chair that vibrates horizontally at the end of a spring. A motion detector determines the amplitude of vibration and the speed of the chair as it passes through the equilibrium position. The spring has a 1200 N/m spring constant, the amplitude of vibration is 0.50m, and the speed of the chair as it passes through equilibrium is 2.0m/s. Using these data, find the combined mass of the chair and the astronaut.
A 24-V battery is connected in series with a resistor and an inductor, Find the energy stored in the inductor one time constant after the switch is closed
A roller coaster at an amusement park has a dip that bottoms out ina vertical circle of radius r. A passenger feels the seat of thecar pushing upward on her with a force equal to twice her weight asshe goes through the dip. If r = 20.0 m, how fast..
A golf ball strikes a hard, smooth floor at an angle of 29.0 ° and, as the drawing shows, rebounds at the same angle. What is the magnitude of the impulse applied to the golf ball by the floor
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. (a) What is the magnitude and sign of the excess charge, noting the electric field of a conducting sphere is equivalent to a point charge at i..
Infrared light of wavelength 2.5 illuminates a 0.20-mm-diameter hole. What is the angle of the first dark fringe in rad, in deg? and sin (fi)=lambda/D is not the formula
Whats the coefficient of the kinetic friction of the tire. What is the acceleration of the car.
A child leaves her book bag on a slide. The bag, which is at the top of the slide, starts from rest and reaches the bottom in 1.40 s. What is the friction force acting on the bag
A long solenoid that has 1,190 turns uniformly distributed over a length of 0.420 m produces a magnetic field of magnitude 1.00 multiply.gif 10-4 T at its center
0.14 kg of water at 88.0 deg C is poured into an insulated cup containing 0.234 kg of ice initally at 0 deg. Calculate the mass of liquid
An 8-m-long beam, weighing 14,700 N, is hinged to a wall and supported by a light rope that is attached 2.0 m from the free end of the beam. calculate the reaction force of the wall on the beam
A 54 {rm kg} ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.5 turns each second. The distance from one hand to other is 1.5 {rm m}. Biometric measurements indicate that each hand typically..
an inclinced plane mass is .5kg inclinced plane at 30 degrees is 6.40m long, a book has kinetic friction with the incline of .2, find out the speed at the bottom of the incline
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