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(1) A small piece of rock is weighed in air and then weighed while immersed in oil of density 800 kg/m3. If the weight in air is 21.5 N and the weight in the oil is 11.8 N, calculate the density of the rock.
(2) A 15 meter length of steel with a cross-sectional area of 20 cm2 is compressed with a force of 10,000 N. If theYoung's modulus of steel is 200 *10^9 N/m2, what is the change in length of the steel beam?
Calculate the gravitational force on a spacecraft 8700km above the Earth's surface if its mass is 1200kg
What percentage of the power of the battery is dissipated across the internal resistance and hence is not available to the bulb
A heavy piece of hanging sculpture is suspended by a 146.0 cm long, 8.03 gm wire. When the wind blows hard, wire hums at its fundamental frequency of 113.0 Hz. What is the mass of the sculpture (in kg) assume that the local acceleration due to gravit..
The central star of a planetary nebula emits ultraviolet light with wavelength 104nm, What is the first-order diffraction angle
In a particular x-ray tube, an electron approaches the target moving at 1.10 108 m/s. It slows down on being deflected by a nucleus of the target, compute the final speed of the electron
how much work is required to place q3 at (0,-3)? D) Calculate the electric potential energy of the group of three charges.
To stretch a certain spring by 3.00cm from itsequilibrium position requires 9.50J of work, What is the force constant of this spring
A hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}.
The total force on a one foot wide section of the inclined portion of the wall and the location and line of action of the resultant force.
A person's prescription for his new bifocal eyeglasses calls for a refractive power of -0.0650 diopters in the distance-vision part, find both the near point and the far point. It asks for both, not just one
Find out the total work done on the car by the external forces.
Two skydivers are holding on to each other while falling straight down at a common terminal speed of 51.1 m/s. What is the change in kinetic energy of the system
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