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A 0.25 kilogram mass attached to a string of length 1 meter is spun in a horizontal circle. Find at what speed must it travel so that the angle the string makes with the horizontal is 30 degree? Evaluate the magnitude of the tension in the string?
1 a heating element in a stove is designed to dissipate 3200 w of heat when it is connected to 245 v. assuming that the
In a model AC generator, a 501 turnrect angular coil 10.0 cm by23 cm rotates at 123 rev/min in a uniform magnetic field of0.6 T. What is the maximum emf induced in the coil?
A student drops two metallic objects into a 32 g steel container holding 169 g of water at 29C. One object is a 486 g cube of copper that is initially at 58C, What was the mass of the aluminum chunk
A thin uniform rod (length = 1.29 m, mass = 1.95 kg) is pivoted about a horizontal frictionless pin through one of its ends. What is the angular acceleration of the rod at the instant it is released
a circular plastic disk with radius r 2.79 cm has a uniformly distributed charge q 4.69 x106e on one face. a circular
q1. a golf ball with an initial angle of 50deg lands exactly 229 m down the range on a level course.a neglecting air
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it, What is the power of one laser pulse
the elastic energy stored in a stretched bungie cord is found to be 568 j. the the bungie cord is stretched 0.349 m
a block with mass M rests on a frienctionless surface and is connected to a horizontal spring force k. Find the maximum amplitude of oscillation such that the top block will not slip on the bottom block
A falling skydiver of mass 86.0 kg accelerates downward at 6.7 m/s2. What is the upward force due to air resistance
A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. What is the average speed of the bicyclist for the trip
A stunt driver drives a 1500 kilogram truck with a length of 4.25 m around a circular curve with a radius of curvature of 0.333 kilometer. Find what minimum centripetal acceleration the truck must have going around the curve so that it will clear th..
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