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On an exo-planet, a 70-kg astronaut steps on a scale and finds that the scale reads 246 N. A survival pack is dropped a distance 85 m to the ground.
(a) How fast will the survival pack be moving just before it hits the ground?
(b) Take the ratio of this speed with the speed of the survival pack if it was dropped on earth.
Suppose the slope of a beach underneath the ocean is 20 cm of dropoff for every 1.6 m of horizontal distance. A wave is moving inland, slowing down as it enters shallower water. What is its acceleration when it is 11 m from the shoreline?
An arrow is fired with a speed of 23 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into block before coming to rest relative to it. All through this process the arrow's deceleration has the magnit..
Vertically polarized light with an intensity of 0.40 W/m2 passes through a polarizer whose transmission axis is at an angle of 55 degrees with the vertical
A diverging lens (f = -12.0 cm) is located 24.0 cm to the left of a converging lens (f = 32.0 cm). What is the height of the final image
Fred and Barney are two electric charges that are to begin with held 1 meter apart and experience an electric repulsion of 10 pounds of force. What would be the force of repulsion between them be if the two were moved closer together so that they ..
Calculate the length of the transmitter antennain order for it to be exactly one half the wavelength of this transmission frequency
A solenoid is made of 400.0 turns of wire, wrapped around a hollow cylinder of radius 1.0 cm and lengh 5.0 cm. What is the self-inducatance of the solenoid
A student removes a 10.50 kg stereo from a shelf that is 1.802 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the work done by a) person and b) gravitational force that acts on the amplifier.
A tube leads from a 0.150 kg calorimeter to a flask in which water is boiling under atmospheric pressure. Compute the heat of vaporization of water
Two point charges of -1microC and 2microC are separated by a distance of 0.30m. What is the electrostatic force on each particle
Two different elements with half lives Ta and Tb have Na & Nb (undecayed) atoms respectively, Determine the ratio of their activities at this instant
A steel ball bearing 8.0 mm in diameter is dropped into a cylinder of glycerin. What is the terminal velocity of the ball bearing
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