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A spring is hung vertically from a fixed support. When an object of mass m is attached to the end of the spring, it stretches by a distance y. When an object of mass of 2m is hung from the spring, it stretches by a distance 2y. The same spring is then set up in a pulley system as shown in the drawing. Here an object of mass m is suspended from a light rope that passes over each pulley and connects to the two ends of the spring. By what distance is the spring stretched in this configuration? Express your answer in terms of the original stretch distance y.
imagine that a site in iceland is discovered where temperatures a relatively short distance below the surface of the
A 732 kilogram car stopped at an intersection is rear-ended by a 1720 kilogram truck moving with a speed of 15.5 m/s. evaluate the final speed of both vehicles after collision
A class of ten students taking an exam has a power output per student of 130 Watt. Evaluate the temperature of the room at the end of 62.0 min if all the heat remains in the air in the room and none is added by an outside source
This procedure has actually been used to "weigh" astronauts in space. A 42.5-\rm kg chair is attached to a spring and allowed to oscillate. What is the mass of the person
The midpoint M of a guitar string is pulled a distance d = 1.2 mm from equilibrium and released. Point M is observed to undergo simple harmonic motion with a frequency f = 270 Hz. Calculate the angular frequency ω of oscillation in radians per seco..
A covex lens of focal length 10 cm placed 40 cm in front of aconcave lens of focal length 25 cm.A small object is placed 20 cmin front of the convex lens calculate the location of the finalimage relative to the second lens. Include a ray diagram
radio waves travel at the speed of light which is 3x108 ms. how many minutes does it take for a radio message to reach
What is the minimum area (in square meters) of the top surface an ice slab 0.416 m thick floating on fresh water that will hold up a 1270 kg automobile? Take densities of ice and fresh water to be 917 kg/m3 and 998 kg/m3, respectively.
Two point charges are separated by 6 centimeter. The attractive force between them is 20 Newton. Calculate what the force between them when they are separated by 12 centimeter
You are standing still, just to the side of a set of train trackers. A train passes by, moving at 25.0 m/s just as it passes by, it blows its whistle, Find the frequency of the sound you hear from the whistle
To give such insulation, how thick would a layer of (a) polyurethane foam and (b) silver have to be? The thermal conductivity of polyurethane foam is 0.024 W/mK, and the thermal conductivity of silver is 428 W/mK.
What is its angular speed 0.1 seconds later?
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