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A hollow sphere of inner radius 7.2 cm and outer radius9.2 cm floats half-submerged in a liquid of density 900kg/m3. What is the mass of the sphere?
Calculate the density of the material of whichthe sphere is made.
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.60 cm. (a) What is the work done by the field on the electron? J (b) What is the change in..
A lamp is designed to operate at a temperature of 3100K. what will be the fractional increase in radiant energy
he resolving power of a microscope depends on the wavelength used. what minimum kinetic energy is required for the electrons
A triangle has its corners located at the points (x,y) = (12.00,15.00), (x,y) = (9.00,8.00) and (x,y) = (0,0). Calculate the area of the triangle
q1. a dog pulls on the pillow with a force of 8.6 n at an angle of 22deg above the horizontal. what is the forward or x
suppose that the gold ions carry one elementary unit of positive charge.
q1. a race car has a mass of 718 kg. it starts from rest and travels 45.0 m in 3.0 s. the car is uniformly accelerated
In the Bohr model of the hydrogen atom, an electron (mass m=9.1×10^?31kg) orbits a proton at a distance of 5.3×10^?11m. How many revolutions per second does the electron make
Prepare a multiple-step income statement for the year ended December 31, 2012, concluding with earnings per share.
A car uniformly decelerates at a rate of -5.00 m/s^2. How far does the car travel after 1.5 seconds if it initially was moving at a speed of 25 m/s
If a charge of 0.30 C passes through a person's chest in 1.0 s, If this rate of charge transfer persists for 4.4s, how many electrons pass through the chest
An aquarium contains a 5 - cm layer of water ( n = 1.333) floating on top of carbon tetrachloride ( n = 1.461) what is the angle of refraction into the air
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