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A certain wire has a resistance of 140 Ω. What is the resistance of a second wire, made of the same material, that is 1/3 as long and has 1/5 the diameter? (answer in ohms)
What is the least thickness of a soap bubble film (n = 1.38) on which light of wave length 610nm shines, assuming one observes constructive interference of the reflected light.
A rocket is launched at an angle of 59° above the horizontal with an initial speed of 97 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 28m/s2.
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
A 325 kg crate is lowered to the ground by a helicopter. Its fastened to the end of the vertical cable which has a tension of 3500N. Is the crate speeding up, slowing down, or descending at a constant speed? Show your work
A sled weighs 100 N. It is held in place on a frictionless 20 degree slope by a rope attached to a stake at the top of the slope; What is the normal force acting on the sled
Suppose a tank contains 770 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. The temperature is changed from 293.2 to 295.6 K. What is the increase in the internal energy of the neon?
A satellite is put in a circular orbit about Earth with a radius equal to 50% of the radius of the Moon's orbit. What is its period of revolution in lunar months
hree uniform meter sticks, each of mass , are placed on the floor as follows: stick 1 lies along the axis from = 0.210 m to = 1.21 m, Calculate the location of the center of mass of the meter sticks
The National Museum of Photography, Film & Television, in England, has a huge converging lens with a diameter of 1.37 m and a focal length of 8.45 m. What is the image magnification
Two different elements with half lives Ta and Tb have Na & Nb (undecayed) atoms respectively, Determine the ratio of their activities at this instant
suppose that the speed of light in a vacuum were one million times smaller than its actual value c 3.00 times 102 ms.
An object is placed 11.7 cm to the left of a diverging lens of focal length -5.81 cm. Find the distance d that places the final image at infinity
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