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A weightless rod of length 2l carries two equal masses 'm', one tied at lower end A and the other at the middle of the rod at B. The rod can rotates in vertical plane about a fixed axis passing though C. The rod is released from rest in horizontal position. The speed of mass B at the instant , rod become vertical is
(1) square(3gl/5)
(2) square(4gl/5)
(3) square(6gl/5)
(4) square(7gl/5)
A 0.6 kg block of Aluminum at 80 Celsius and a 0. 3 kg block ofcopper at 70 Celsius are placed inside 1.2 liters of water at 20Celsius. The system is thermally isolated. What is the final temperature after the system has equilibrated?
Water flows steadily from an open tank as shown in the figure. The elevation of point 1 is 10.0 meters, and the elevation of points 2 and 3 is 2.00 meters. The cross-sectional area at point 2 is 0.0480 square meters; at point 3, where the water is di..
A gymnast of mass 55.0 hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value for the acceleration of gravity.
Consider the chemical reaction given. The initial concentrations of CO(g) and H2O(g) 0.35 M and 0.40 M respectively, What is the value of the equilibrium constant for this reaction
If you pass current through a standard coiled spring, what happens to the spring? Will it expand as if pulled, contract as if compressed, or remain in its given state?
If the reciever that he is trying to throw the ball to runs at 8 m/s, how long a time t should the quarterback wait before throwing the ball to complete the pass at his maximum rang
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet, in years
A person is riding a bicycle, and its wheels have an angularvelocity of 11.0 rad/s. Then, the brakes are applied and the bikeis brought to a uniform stop. During braking, the angular displacement of each wheel is 19.6 revolutions
A galvanometer with a coil resistance of 14.0 and a full-scale current of 0.120 mA is used with a shunt resistor to make an ammeter. The ammeter registers amaximum current of 4.00 mA. Find the equivalent resistance of the ammeter.
consider a merry-go-round in the shape of a uniform disc of mass 400 kg and radius 3 m. two children each of mass 20 kg
A 0.20 kg hockey puck slides across a frictionless ice rink at a constant speed of 25 m/s. Ignoring air resistance, what is the work done on the puck while it is sliding
The latent heat of vaporization of steam is 539 cal/g. By howmany joules does the internal energy of 1 g of steam change as ittransforms from stream to water all of 100oC? Assume that the steam orginally filled a container of fixed volume.
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