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A gymnast is performing a floor routine. In a tumbling run she spins through the air, increasing her angular velocity from 2.70 to 4.60 rev/s while rotating through one half of a revolution. How muc
A jar of salsa sits on a wheel that is turning at 22 rpm (revolutions per minute). If the jar sits 42 cm from the center of the wheel, what is the acceleration of the jar?
What is the average angular velocity of one of the mandibles of the trap-jaw ant when the mandibles snap shut?
Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other.
The smooth frictionless inclined surface makes an angle of ? = 31° with the horizontal, and the block on the incline has a mass of 5.7 kg. The mass of the hanging block is 2.37 kg. Find the magn
A large storage tank, open to the atmosphere at the top and filler with water, develops a small hole in its side at a point 16m below the water level. if the rate of the flow of water from the leak
A negative charge of -3 x10^-6C and a positive charge of 4.0 x10^-6 C are separated by a distance of 3 mm. What is the force on the negative charge? (magnitude and direction). A. what is the force o
The battery is removed. The fully charged capacitors are connected to each other such that terminals of opposite sign are joined together. Afterwards what is the equilibrium voltage across one of th
A geothermal power plant uses geothermal water extracted at 150°C at a rate of 210 kg/s as the heat source and produces 8000 kW of net power. The geothermal water leaves the plant at 90°C. I
A positive and negative charge, each with 3x10^-6C charge are separated by a distance of 4mm. Find the size of the force acting on each charge. a. what would be the size of the force if the distance
A particle of ink in an ink-jet printer carries a charge of -8X10^-13 C and is deflected onto paper with a force of 3.2X10^-4 N. Find the strength of the electric field.
Consider three identical resistors, each of resistance R. The maximum power each can dissipate is P. Two of the resistors are connected in series, and a third is connected in parallel with these two
A 600-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 40 percent. Determine the rate of heat transfer to the river water. Will the actual heat transfer rate be h
Two resistors of 5.0 and 9.0Ω are connected in parallel. A 4.0Ω resistor is then connected in series with the parallel combination. A 6.0 V battery is then connected to the series-parall
A 6,000-lb vehicle is 20ft. from one end of a 60-ft bridge. A 3,000-lb vehicle is 40ft from the same end of the bridge. How much weight must each end of the bridge support.
A piece of material weighs 2.50 grams in air, 1.50 grams in water, and 0.70 grams in sulphuric acid. What is the density of the acid? Assume the density of water is 1000 kg/m3.
A 60 kg rectangular box, open at the top, has a base dimensions 1.0 m by 0.80 m and depth 0.50 m. a) How deep will it sink in fresh water? Assume the density of water is 1000 kg/m3.
When a crown of mass 14.7 kg is submerged in water, an accurate scale reads only 13.4 kg. What material is the crown made of?
Jill of the Jungle swings on a vine 5.9 m long. What is the tension in the vine if Jill, whose mass is 61 kg, is moving at 2.5 m/s when the vine is vertical?
The magnitude of the external magnetic field is changing at a rate of delta(B)/delta(t) = 0.870 T/s, thereby inducing a current in the coil. Find the magnitude of the magnetic field at the center of
If the wire is heated to 30.0°C, while the 10.0 V potential difference is maintained, what is the resulting current in the wire?
A satellite is placed in orbit 5.10 x 105 m above the surface of the planet Jupiter. Jupiter has a mass of 1.90 x 1027 kg and a radius of 7.14 x 107 m. Find the orbital speed of the satellite.
A rectangular block of copper has sides of length 5 cm, 16 cm, and 38 cm. If the block is connected to a 4.0 V source across two of its opposite faces of the rectangular block, what are the currents
The skater farthest out has a mass of 80.0 kg and is 6.20 m from the pivot. He is skating at a speed of 6.40 m/s. Determine the magnitude of the centripetal force that acts on him.