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A crane lifts a steel sub (dens. 7.8 x 10^3 ) of mass 20,000 kg. What is the tension in the lifting cable
a) when the sub is submerged and
b) when its entirely out of the water?
Three equal point charges, each with charge 1.95 , are placed at the vertices of an equilateral triangle whose sides are of length 0.400 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
A scuba tank has a volume of cm2. For every deep dives, the tank is filled with (by volume) pure oxygen and 50% pure helium. What is the ratio of the rms speeds of the two types of molecules
Four 3.5 kg spheres are located at the corners of a square of side 0.60 m. Calculate the magnitude and direction of the gravitational force
The range of human hearing is roughly from twenty hertz to twenty kilohertz. what are the lengths of the longest and shortest pipes
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.90×106 N, one at an angle 12.0 degrees west of north, What is the total work done by the two tugboats on the supertanker
Two runners of mass 70 kg and 60 kg,respectively, have a total linear momentum of 350 kg*m/s. The heavier runner is running at 2.0m/s. Examine the possible velocitis of the lighter runner.
A small, 100g cart is moving at 1.70m/s on an air track when it collides with a larger, 3.00kg cart at rest. what is the speed of the large cart after the collision
A metal ring having an outside radius of 38.0 cm, and an inside radius of 30.5 cm, has a mass of 15.0 kg. What is the moment of inertia of the ring
An aluminum wire carrying a current of 3.0 A has a cross-sectional area of 2.0 ? 10-6 m2. Find the drift speed of the electrons in the wire
A piece of thin spherical shell that has a radius of curvature of 110 cm is silvered on both sides. The concave side of the piece forms a real image 82.5 cm from the mirror. How far was the mirror moved
Calculate the probability of finding the electron in the ground state of hydrogen at less than one Bohr radius from the nucleus
q1. an airplane flies 200 km due west from city a to city b and then 315 km in the direction of 33.0deg north of west
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