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Alpha particles of kinetic energy K are scattered either from a gold foil or a silver foil of identical thickness. Find the ratio of the number of particles scattered at angles greater than 90 degree by the gold foil to the same number for silver?
A 1.5 kg bicycle wheel with a radius of 0.27 m turns at a constant angular speed of 28 rad/s when a(n) 0.33 kg reflector is at a distance of 0.14 m from the axle. What is the angular speed of the wheel
Light traveling in air enters a material at an angle of 25 degrees with respect to the normal. The refracted beam in the material makes an angle of 18 degrees with respect to the normal. Calculate the index of refraction of the material.
A computer to be used in a satellite must be able to withstand accelerations of up to 27 times the acceleration due to gravity. What is the minimum amplitude of vibration
a hollow sphere has a mass of 15kg, an inner radius of 12cm and an outer radius of 18cm. What is the rotational inertia of the sphere
An F-18 jet fighter flies directly overhead at a height of 18000mat 5/3 the speed of sound. Make a diagram that adequately illustrates thesituation and shows the parameters used to calculate the angle ofthe shock wave.
What's the result when we grow up InGaN on the substrat by MBE I want a (pdf) discruption or I want to talk to any one who knew that's result.
The force involved in a collision is 1.0 × 10^2 newtons. What is the value of the change in momentum
What minimum heat is needed to bring 138g water at 22°C to the boiling point and completely boil it away.
An ideal monatomic gas with 3.6mol undergoes a reversible increase in temperature from 380 K to445 K at constant volume. What is the entropy change of the gas
A sphere with radius 0.185m has density p that decreases with distance r from the center of the sphere according to p=3250 kg/m^(3) - (8750 kg/m^(3))r. Find total mass of the sphere
Two thin lenses with a focal length of magnitude 16.5cm , the first diverging, How far from this first lens is the final image formed
An air bubble has a volume of 1.80 cm3 when it is released by a submarine 120 m below the surface of a lake. Find the force exerted by the gas on one of the walls of the container
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