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Assume that crude oil from a supertanker has density 750kg/m3. The tanker runs aground on a sandbar. To refloat the tanker, its oil cargo is pumped out into steel barrels, each of which has a mass of 15.0kg when empty and holds 0.120m3 of oil. You can ignore the volume occupied by the steel from which the barrel is made. If a salvage worker accidentally drops a filled, sealed barrel overboard, it will float in the seawater. What fraction of its volume will be above the water surface?
A step-down transformer (turns ratio = 1:6) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train. What is the current in the primary coil
Illustrate what is the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center?
Two converging lenses are placed 88.0 cm apart. An object is placed 1.100 m to the left of the first lens, which has a focal length of 27.0 cm. What is the focal length of the second lens
The electrons in the beam of a television tube have a kinetic energy of 3.26 × 10-15 J. What is the acceleration of an electron due to this field component
A city planner is working on theredesign of a hilly portion of a city. calculate the maximum steepness of a hill
An atomic nucleus initially movingat 420m/s emits an alpha particle in the direction of its velocity,and the remaining nucleus slows to 350 m/s. what speed does the alpha particle have when it is emitted
What is the magnetic field amplitude of an electromagnetic wave whose electric field amplitude is 15V/m
A block with a mass of 15killogram is held stationary by a cord on a frictionless plane that is inclined at an angle θ=27 degree. find the acceleration of the block as it slides down the inclined plane
An athlete executing a long jump leaves the ground at a 35° angle and lands 7.30 m away.
A charge +q is at the origin. A charge -2q is at x = 9.10 m on the +x axis. (a) For what finite value of x is the electric field zero? (b) For what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V =..
a globular cluster at its farthest point from the galactic center is at a distance of 104 pc.what is its period of
A torque of 0.15 N*m is applied to an egg beater. If the egg beater starts at rest, calculate the angular momentum after 0.70 second
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