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An Alpha particle of energy 4 keV (1 eV = 1.6 x 10^-19 J) is scattered by an aluminium atom through an angle of 90 degrees. Calculate the distance of closest approach to the nucleus. ( Atomic number of alpha particle = 2, atomic number Al = 13, e = 1.6 x 10^-19 C).
A woman once survived a fall of over six miles without a parachute when her plane exploded. What is this distance in meters
At what temperature does a carbon resistor have a resistance of 995ohms, if it has a resistance of 1000 ohms at 20 degrees? What is its conductivity at the new temperature
A 6 kg bowling ball slides down the alley at a speed of 5 m/s. How much kinetic energy does the ball have
What is the critical angle for total internal reflection for light moving from fabulite (n=2.409) into air (n=1.000)
question1a compute dissimilarity in blood pressure between the feet and top of the head for a person who is 1.65 m
a wire of initial length l0 and radius r0 has a measured resistance of 1.0 . the wire is drawn under tensile stress to
A jetliner is moving at a speed of 235 m/s. The vertical component of the plane's velocity is 42.9 m/s. Evaluate the magnitude of the horizontal component of the plane's velocity.
An 2400W arc welder is connected to a 660?Vrms ac line, Calculate the peak voltage and Calculate the peak current
A 140 g air-track glider is attached to a spring. The glider is pushed in 12.00 cm and released. A student with a stopwatch finds that 9 oscillations take 10.0 s.
John is farsighted and cannot see objects clearly that are closer to the eye than 65.0 cm. What is the focal length of the contact lenses
a mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.24 cm.a if the spring
A satellite of mass 5460kg orbits the Earth and has a period of 6520s. Determine the radius of its circular orbit
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