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Three light bulbs each with a resistance of 50W, are connected in series to a 100 V power supply. What is the current flowing through the third light bulb?
A yo-yo of mass 0.10kg and a radius of 0.03 m is released from rest, with the free end of the yo-yo string held fixed. Find the acceleration of the yo-yo
As observed from Earth, the wavelength of Hβ in the spectrum of the star Megrez in the Big Dipper is 486.112 nm. Laboratory measurements demonstrate that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or mo..
After the interaction, the particles (which can't be distinguished) are observed moving at angles 55.3° and 34.7°, both angles being measured with respect to the original direction of motion. Illustrate what are the final speeds of the particles?..
Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. What is the corresponding change on the Fahrenheit scale
find a horizontal force needed to pull a mass of 500 gram at constant velocity on a level surface and µk = 0.3?
Steam can cause more serious burns than water at the same temperature. Here we examine this effect quantitatively, noting that flesh becomes badly damaged when its temperature reaches 50.0 C a)Calculate the heat released as 13.0g of liquid water a..
A small ball rolls horizontally off the edge of a tabletop of height h, How long is the ball in the air and What is its speed at the instant it leaves the table
Ray decides to paint the outside of his uncle's house. He uses a 4.0-m-long board supported by cables at each end to paint the second floor. find the force that the left cable exerts on the board
Show that the force between parallel wires carrying currents I1 and I2, both in the same direction, find the magnetic force on segment dI2 of wire 2.
A movie camera with a (single) lens of focal length 90 mm takes a picture of a person standing 21 m away. If the person is 180 cm tall, what is the height of the image in millimeters
A small remote-control car with a mass of 1.59 kg moves at a constant speed of v = 12.0 m/s in a vertical circle inside a hollow metal cylinder that has a radius of 5 m.
During an action potential, Na+ ions move into the cell at a rate of about 3×10^?7mol/m2?s. How much power must be produced by the "active Na+ pumping" system
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