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Suppose you wish to make a solenoid whose self-inductance is 1.0 mH. The inductor is to have a cross-sectional area of 1.80 x 10-3 m2 and a length of 0.053 m. How many turns of wire are needed?
1 a bug is on the rim of a disk of diameter 14 in that moves from rest to an angular speed of 78 revmin in 4.4 s.a.
A solid block is suspended from a spring scale. Whenthe block is in air the scale reads 34.7 N, when immersed inseawater the scale reads 30.1 N, What is the density of the block
Two converging lenses which have focal lengths of +3.0 cm and +2.0 cm are 10 cm away from each other. find the height of the image formed by the seconds lens
The proper length of one spaceship is 2.8 times that of another. The two spaceships are travelling in the same direction and, while both are passing overhead, an Earth observer measures the two spaceships to be the same length.
A 0.250 kg ball attached to a string s being swung in a vertical circle, What is the minimum speed at the top of the circle to keep the string from going slack
A 0.10-kg balloon is filled with helium (density = 0.179 kg/m3). If the balloon is a sphere with a radius of 5.4 m, what is the maximum weight it can lift
Ethanol has an index of refraction of 1.36 and Quartz has an index of refraction of 1.54. If light in Ethanol is incident on Quartz at an angle of 44.9 degrees with the normal, what is the angle of refraction?
A coil has resistance R=14Ohms and inductance L=3milliHenries and is powered by a generator with variable frequency and maximum voltage V = 10Volts.
it takes 60 joules of work to move 2 coloumbs of charge from point A to point B. what is the potential difference between point A and point B
The mass of the Moon is 7.18X10^22 kg and radius is 1738 km. If your mass is 90 kg, what would be your weight (gravitational force of attraction) on the Moon
In a hydraulic system with a large and a small piston, you wish to lift a 1130 kg car sitting on the large piston that has a diameter of 28.2 cm, What is the diameter of the small piston
A car moving with an initial speed v collides with a second lighter stationary car that is 49.6% as massive. Calculate the final speed of the two cars after the collision
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