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Two identical coaxial coils of wire of radius 39.7 cm are directly on top of each other, separated by a 3.03 mm gap. The lower coil is on a flat table and has a current i in the clockwise direction; the upper coil carries an identical current and has a mass of 52.5 g. Determine the magnitude that the current in the upper coil has to have to keep the coil levitated at its current height.
a box sits on a horizontal wooden board. the coefficient of static friction between the box and the board is 0.25. you grab one end of the board and lift it up, keeping the other end of the board on the ground. what is the angle between the board ..
The length of a string is 532cm. It is held fixed at each end. The string vibrates in seven sections; i.e. string has seven antinodes, and the string vibrates at 150 Hz. What is the wavelength.
A lens of focal length 15.0 cm is used to create an image of the Full Moon. What is diameter of the image? The Moon's radius and average distance from Earth are 1.74× 106m and 3.85× 108 m, respectively
the current in a 30 meter wide river is 3 m/s towards the north. If you need to move straight across the river, how far downstream do you reach the shore
Consider a sample of diatomic ideal gas which is taken through the following cycle: A constant pressure process that doubles the volume of the gas, What is the efficiency of this cycle
An L-C circuit containing an 83.0-mH inductor and a 1.70-nF capacitor oscillates with a maximum current of 0.730A.calculate the energy stored in the inductor after 2.50ms of oscillation
Two spherical balls have volumes in the ratio of 27:1. What is the ratio of their surface areas
q1. a certain elevator cab has a total run of 171 m and a greatest speed is 4.75 msec and it accelerates from rest and
The rod is initially at rest and oriented horizontally and then released so that it swings to the bottom. Illustrate what are all the forces acting on the rod?
A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. How much work is done by the variable force that stretches the collagen
A 2000kg vehicle is travelling down the road at 20m/s (45 mph) when it reaches an intersection. Between rubber and dry asphalt, the coefficient of friction is 0.80. What is the minimum distance necessary for the car to stop.
if your body has a density of 967 kg/m^3, What fration of you will be submerged when in salt water? the density of salt water is 1025 kg/m^3
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