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two 70kg bowling balls each with a radius of 017m are in contact with one another what is the gravitational attraction
a nucleus of oxygen-15 undergoes electron capture write out the reaction equation and determine the identity of the
unpolarized light passes through two polaroid sheets the transmission axis of the analyzer makes an angle of 402deg
a mass-spring system oscillates with an amplitude of 520 cm if the spring constant is 247 nm and the mass is 535 g
a helium-neon laser 6328 nm is used to calibrate a diffraction grating if the first-order maximum occurs at 200deg
light of wavelength 570 x102 nm passes through a slit of width 0220 mma find the width of the central maximum on a
a series rlc circuit consists of a 90ohm resistor a 020h inductor and a 105mf capacitor it is attached to a 120v60hz
the fan blades on a jet engine make one thousand revolutions in a time of 765 msa determine the period in secondssb
a steel piano wire of length 0650 m and mass 580 g is stretched under a tension of 4600 n what is the speed of
block a of mass 40 kg is on a horizontal frictionless tabletop and is placed against a spring of negligible mass and
a 130 kg mass on a spring oscillates horizontally with little friction according to the following equation
a particle has a position vector given by r 12ti 60t-25t2j where r is in meters and t is in seconds find the
the polar ice caps contain about 23times1019 kg of ice this mass contributes negligibly to the moment of inertia of
air streams horizontally past a small airplanes wings such that the speed is 630ms over the top surface and 530ms past
water is flowing in a pipe with a varying cross-sectional area and at all points the water completely fills the pipe at
you have a set of converging lenses with focal lengths 105 cm 145 cm 480 cm and 745 cma which two lenses would you
a refracting telescope is used to view the moon diameter 3480 km distance from earth 385000 km the focal lengths of the
water is flowing in a cylindrical pipe of varying circular cross-sectional area and at all points the water completely
a microscope has an objective lens of focal length 675 mm the objective forms an image 164 cm from the lens the focal
if the rubber of the balloon itself has a mass of 200g and the balloon is filled with helium density 0166kgm3
a hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake the
a layer of oil with density 800 kgm3 floats on top of a volume of water with density 1000 kgm3 a block floats at the
the eyepiece of a microscope has a focal length of 125 cm and the objective lens focal length is 126 cma if the tube
estimate the fraction of electrons excited above the fermi level at room temp for aluminum the effective mass of al is