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A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be cancelled. Suppose the experiment is done inside a solenoid of diameter 1.2m , length 3.0m , with a total of 5000 turns of wire. The solenoid is oriented to produce a field that opposes and exactly cancels the field of the earth. What current is needed in the solenoid's wires?
A student is standing on a ladder as shown in the figure to the right. Each leg of the ladder is 2.7 m long and is hidged at point C. What is the tension in the tierod
Quadrupole moments in the shell model
Water flowing through a garden hose of diameter 2.73 cm fills a 21.0-L bucket in 1.60 min. find the speed of the water leaving the end of the hose
A sled and rider with a combined weight of 67 kg are at rest on the top of a hill 26 m high. What is their total energy at the top of the hill
The nuclear reaction that powers the sun is the fusion of four protons into a helium nucleus. How much energy is released in each fusion
A 24kg chimpanzee hangs from the end of a horizontal, broken branch of length L0 = 1.4m , What is the shear modulus for this branch
Skier loses a ski at the top of a 98 m hill. The ski proceeds to glide down the hill frictionless. Illustrate what speed is the ski traveling at the bottom of the hill?
I have a rectangular slab of aluminum that is in contact with a rectangular slab of copper and both slabs are 5.00 cm x 15.0 cm in area. how much energy would flow from one face to the other
Coulomb's Law gives us an expression for the electric field caused by a point charge with magnitude . Suppose we have several point charges. The electric field at a location is the vector sum of point charge contributions.
The mass of a newborn baby's brain has been found to increase by about 1.6 mg per minute. How much does the brain's mass increase in one day? How long does it take for the brain's mass to increase by 0.0045 kg ?
A 1200N uniform boom at 65 to the horizontal is supported by a cable at an angle of 25. The boom is pivoted at the bottom, find the tension in the supported cable
An open-pit coal mine consumes 71hectares of land, down to a depth of 23m, each year. What volume of earth, in cubic kilometres, is separate in this time.
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