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One of the intriguing questions for scientists of many ages has been "What are the elementary particles?" Which of the following is not considered an elementary particle?
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. determine the average angular speed of this pulsar
A vessel whose walls are thermally insulated contains 2.30kg of water and 0.400kg of ice, all at a temperature of 0.0 ?C. How many grams of steam must condense inside the vessel
A 2-kg box is initially sliding at a speed of 15 m/s on a horizontal surface. What is the coefficient of kinetic friction between the box and the horizontal surface
A 1500 kilogram van starts from rest and drives around a flat 50 meter diameter circular track, Find the direction and magnitude of the van's acceleration at t=10sec
two equal positive charges are on the axis one point charge is at y a and the other is at y -a.a show that on the x
A cube of ice with a mass of 150 g at a temperature of 0.0oC is placed in 750 g of water at a temperature of 25.0oC. The water and ice are in an insulating container so that no heat is lost to the environment. The water and ice eventually come to t..
A piece of a wire, with the cross-sectional area of 0.5176 mm2 and 1.80 meter long, has the resistance 9.22 x 10-2 ohms. Determine the resistivity of the material of the wire
A salt shaker sits on a wheel that is turning at 20 rpm. If the wheel's diameter is 43 centimeter. Determine the acceleration of the salt shaker
A boy of mass 48.7 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 11.1 m/s. discover the final velocity of the skateboard.
a car traveling due east at 20 m/s reverses its direction over a period of 10 seconds so that it is traveling due west at 20 m/s. find the direction of the car's average acceleration
An Oscilloscope grid is calibrated so that one square represents 1-V vertically and 1 msec horizontally. If the height of a square wave pulse display is 6 squares, the width of the pulse is 7 squares, and the cycle of the wave is 16 squares, the a..
a 71 kg baseball lplayer jumps straight up to catch a line drive. If the 140 g ball is moving horizontally at 28 m/s and the catch is made when the ball player is at the highest point of his leap what is his speed immediately after stopping the ba..
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