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An elastic cord vibrates with a frequency of 3.0 Hz when a .60 kg mass hangs from it. What would its grequency be if .38 kg hang from it?
Two students on roller skates stand face-to-face, then push each other away. One student has a mass of 99 kg and the second student 68 kg. Find the ratio of the magnitude of the first student's velocity to the magnitude of the second student's velo..
A 291-kg motorcycle is accelerating up along a ramp that is inclined 30.1° above the horizontal. Find the magnitude of the motorcycle's acceleration
A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 290 kg) that is also at rest. Determine the velocity of the second log if the lumberjack comes to rest on it
Calculate the hydrostatic difference in blood pressure between the brain and the foot in a person of height 1.75 m
blocks are lined up in a row on a frictionless table. How much force does the 8.0 block exert on the 7 block.
The human eye can detect light intensities as small as about 8 10-23 W/m2. The corresponding electric field amplitud is 2.5E-10N/C, How does this force compare to the weight of an electron
As we discussed in class, most of the refraction in your eye happens at the surface of your cornea (n = 1.376). Use this idea to explain why wearing a swimming mask or goggles helps us to see more clearly underwater. Include a diagram in your expla..
A 70.0kg archer, standing on frictionless ice, shoots a 100g arrow at a speed of 50m/s. What is the recoil speed of the archer
A 80g , 39-cm-long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 14g ball of clay traveling horizontally at 2.3m/s hits and sticks to the very bottom tip of the rod.
A flat circular coil with 107 turns, a radius of 4.32 10-2 m, and a resistance of 0.472 ? is exposed to an external magnetic field that is directed perpendicular to the plane of the coil.
Some enterprising physics students working on a catapult decide to have a water balloon fight in the school hallway. At what angle must they be launched to just graze the ceiling
What is the potential at the center of a square with point charges +1, +2,+ 2, +3 arranged at its corners and side length s? What is the work done to place the charges at the corners
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