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A wire has a resistance of 22.9 ohm. It's melted down, and from the same volume of metal a new wire is made that is four times longer than the original wire. Find what is the resistance of the new wire?
Ω
The vertical displacement y(x,t) of a string stretched along the horizontal x-axis is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 rad/s)t]. What is the distance between adjacent crests of the wave
Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. what is the mass of canoe 2
Two electric dipoles with charges ±Q, where Q=5.0 ?C, are arranged parallel to each other. What is the strength of the electric force between the two dipoles
The two hot-air balloons in the drawing are 48.2m and 61.0 m above the ground, What is the horizontal distance x between the two balloons
Ted is traveling on his railroad car (length 30 m) at speed v = 0.6 c as shown in the figure. As measured on Alice's clock, how long does it take for Ted's railroad car to pass Alice
a spherical mirror is polished on both sides. when the concave side is used as a mirror the magnification is 2.0. what
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
A fast, measured pitched baseball left the pitcher's hand at aspeed of 40.0 m/s. How much time did it take him to pitch it
On a perfect fall day (20oC) you are hovering at low altitude in a hot-air balloon, accelerating neither upwards nor downwards. Calculate the weight of the displaced air
The threshold of dark-adapted (isotopic) vision is 6.0 multiplied by10-11 W/m2 at a central wavelength of 450 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 8.5 mm, how many photons pe..
A lens of focal length 15.0 cm is used to create an image of the Full Moon. What is diameter of the image
It was a dark and storym night, when suddenly you saw a flashof lightning Three-and-a-half seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightning bolt?
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