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Three balls A, B, C, with masses of 2.8kg, 1.1kg, and 0.9kg, respectively, are connected by massless rods, as shown below. What are the coordinates of the center of mass of this system?
A hydrogen atom is in its second excited state, n=3. Find the total energy of the atom
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.875 rad/s. You, with a mass of 69.5 kg, Calculate the total angular momentum of the system
A charge of -2.45 nC and acharge of -5.65 nC are separatedby a distance of 70.0 cm. Find the position at which a third charge of +7.20 nC can be placed so that the net electrostatic force on it is zero. a) cm from the -2.45 nC charge b)cm fromthe -5...
Block M=70N and block m=35N are connected by a string as shown. If the pulley is massless and the surface is frictionless, the magnitude of the acceleration of the 35N block is block is:
White light (380nm-750nm) strikes a diffraction grating (790lines/mm) at normal incidence. Determine is the highest-order visible maximum that is formed?
As a copper wire is heated, its length increases by 0.050%. What is the change in temperature of the wire? (copper= 16.6 x 10-6/Co)
There is a current of 0.83 A through a lightbulb in a 120 V circuit. What is the resistance of this lightbulb
A village maintains a large tank with an open top, containing water for emergencies. The stopper is removed. What mass of water flows from the nozzle in 2.00 h
Three equal point charges, each with a charge of 1.80?C , are placed at the corners of an equilateral triangle whose sides have a length of 0.550m, What is the potential energy of the system
A cylindrical tank with a large diameter is filled with water to a depth D = 0.310 m. What is the rate at which water flows out, in cubic meters per second
A skier with a mass of 59 kg starts from rest and skis down an icy (frictionless) slope that has a length of 44 m at an angle of 32° with respect to the horizontal.
Ethan, whose mass is 87 kg, stands at one end of a very long, stationary wheeled cart that has a mass of 650 kg. Ethan starts sprinting toward the other end of the cart. He soon reaches his top speed of 8.0 m/s, gauged relative to the cart.
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