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A thin spherical shell of mass 0.450 kilogram and diameter 0.230 meter is filled with alcohol (ρ = 806kg/m3). It is then released from rest at the bottom of a pool of water. Evaluate the acceleration of the alcohol-filled shell as it starts to rise toward the surface of the water.
A composite bar oflength L = L1 + L2 is made from a bar of material 1 and length L1 attached to a bar of material 2, Show that the coefficient of linear expansion
Suppose you are a Medieval knight attacking a castle with a cannon. The ball leaves the cannon with a speed of 44.3 m/s. Evaluate the time of flight of the cannon ball
a proton starts from rest and is accelerated through a potential difference of 2100 v. the proton then leaves the
Two flat surfaces are exposed to a uniform, horizontalmagnetic field of magnitude 0.47T. When viewed edge-on, the firstsurface is tilted at an angle of 12 degrees from the horizontal,and a net magnetic flux of 8.4E-3 WB passes through it.
A Heavy rainstorm dumps 1.0 cm of rain on a city five km wide and 8 km long in a two hr period. How many metric tons (1metric ton = 10^3 kg) of water fell on the city? [1cm^3 of water has a mass of 1 gram=10^-3.] How many gallons of water was this?
A light source for light scattering has a resistance of 160Ω. A DC voltage of 100 Volt is attached across it. Find the current through the source
Two 4.0 cm × 4.0 cm electrodes spaced 2.0 mm apart form a parallel-plate capacitor. What is the charge on each electrode
A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). what is the density of the gas in this geiger tube
A negative charge of -0.55 uC exerts an upward 0.200N force on an unknown charge 0.300m, What is the unknown charge (magnitude and sign)
A block that was initially at rest is sliding on a steel surface at 0.8 m/s for .2 m. Calculate the temperature rise from friction
As measured in Earth's frame of reference, two planets are4.25×105 km apart. How fast is the ship traveling in m/s
Starship Enterprise is orbiting planet Qruqx IV (mass 6.4 x 1024 kilogram, radius 6400 kilometer) at an altitude of 38000 kilometer. Find what is its angular velocity
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