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Q. In the laboratory frame, two observers A and B are moving along the sides of an equilateral triangle with equal speeds c/2, as shown in the figure. Find the speed of B as seen by A.
one mole of an ideal gas at 1 atm and 0 c is compressed isothermally from 50l to 20l during this process energy is
Two forces, F1 and F2 act at a point. F1 has a magnitude of 8.80N and is directed at an angle of 62 degrees above the negative X axis in the second quadrant. What is the magnitude of the resultant force
A child bounces a 56 g superball on the side walk. The velocity change of the superball is from 24 m/s downward to 18 m/s upward. what is the magnitude of the force exerted on the superball
An electric current in a conductor varies with time according to the expression I(t) 5 100 sin (120pt), What is the total charge passing a given point in the conductor
A 5 kg rock is dropped from rest down a vertical mine shaft. How long does it take for the rock to reach a depth of 79 m? Neglect air resistance.
A uniform circular metal disk has radius 36 cm and mass 350 g and its center is at the origin. Then a circular hole of radius 9 cm is cut out of it. What is the total linear acceleration of a piece metal at the disk's outer edge
a particular material has a dielectric constant of 1.7 and a dielectric strength of 14.0 mvm. if this material is used
two light bulbs one rated 50 w and a second rated 100 w are both supposed to be connected to a 110 v source of emf.
The average intensity of sunlight reaching the earth is 1390W/m2. What is the magnitude of the maximum electric force that the charge experiences
A wooden block is pulled 12 m across a frictionless surface using a rope. What angle does the rope make with the horizontal
A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 550 nm, while the power is 1.71W. how many photons are emitted by the laser
The heater element of a toaster is 5.40m length of nichrome wire, whos diameter is 0.480mm. What is the power drawn by the toaster
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