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A wire length 24 cm is bent into a squsre and placed flat on a table. A current of 45 mA is passed through the wire in a counterclockwise direction from looking above. What is the magnitude and direction of the resulting magnetic field at the center of the square.
Two sqaures of wire like that of above are placed side by side on a table with a distance of 8 cm between the closest sides of the two sqaures. A 45 mA current passes counterclockwise through both squares. What is the resulting force between the two squares? Is it repulsive or attractive?
A cardinal (Richmondena cardinalis) of mass 3.60×10-2 kg and a baseball of mass 0.140 kg have the same kinetic energy. What is the ratio of cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum.
A helicopter is ascending vertically with the speed of 5.79. At a height of 127 above the Earth, a package is dropped from a window. How long take the package to hit the ground.
A spaceship is coming directly toward you while you are in the international space station. You are told that the spaceship is shining sodium light. You have an apparatus that and resolve two closely spaced wavelengths if the difference is 0.55 nm. I..
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a highest of 90cm, what was the speed of the bullet at impact with the block.
An ocean liner leaves New York City and travels 16.10 ° north of east for 234 km. How far east and how far north has it gone? In other words, what are the magnitudes of components of the ship's displacement vector in directions (a) due east and (b..
A 24 inch string is wrapped around the 1/8 inch radius axis of a yo yo. Starting from rest, the yo yo descends with the constant angular acceleration of 4 rad/seconds squared. How long will it take the string to totally unwind.
Assume that it takes 2.30 kg of oxygen to burn 1.00 kg of coal. (The actual amount varies with the type of the coal). What is the total mass of the reagents used in the combustion all through the 30 days.
Several vectors in the x-y plane are shown in the figure with their tails at the origin of the coordinate system and with a label at their heads
A 2 kg mass passes through the origin (x=0) with initial velocity -3m/s to the left on a horizontal frictionless table, Find the values of x which the mass has zero acceleration
The rock strikes the ground a horizontal distance of 44 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How long did the rock take to hit the ground? Give your answer in seconds to two d..
A loudspeaker of mass 19.0 kg is suspended a distance of = 1.60 m below ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 3.30m . What is the tension in each of the cables.
A canoe has a velocity of 0.54m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.52m/s east relative to earth.
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