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a laser beam is traveling through an unknown substance when it encounters a boundary with air the angle of reflection
to determine the muzzle velocity of a bullet fired from a rifle you shoot the 357-g bullet into a 247-kg wooden block
the following data have been obtained for oxygen gas at 27315k calculate the best value of the gas constant r from them
two identical diverging lenses are separated by 15 cm the focal length of each lens is -80 cm an object is located 40
a bicyclist climbs a 20km long hill that makes an angle of 70deg with the horizontal the total weight of the bike and
calculate the earthrsquos radiative temperature te for an albedo value of 027 030 and 033 then estimate the surface
the centers of a 800kg lead ball and a 150g lead ball are separated by 800cm what gravitational force does each exert
a pole vaulter vaults over the bar and falls onto thick padding he lands with a speed of 98ms the padding then brings
a uniform ladder 100 m long is leaning against a frictionless wall at an angle of 600deg above the horizontal the
a uniform cylindrical pulley of mass m127 kg and radius r0636 m rotates freely about a fixed horizontal axis a block of
a 40-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to
a simple pendulum makes 140 complete oscillations in 250 min at a location where g 980 ms2a find the period of the
a spring-loaded pellet gun is designed to fire 340 g projectiles horizontally at a speed of 390 msa if the spring is
you have one heavy cart at 15kg and the lighter one at 10kg neglect friction the heavy cart starts at rest you push the
a photon with wavelength 4 x 10-15m converts to a muonantimuon pair the rest mass energy of the muon and the antimuon
you take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a
an astronaut speedo travels to a distant planet and back with speed 07c he is 30 yrs old when he departs and 50 years
using the de broglie and planck-einstein formulas and considering a a helium atom with a kinetic energy of 00025ev ie
if the gas is irradiated with monochromatic light of 466 nm wavelength what is the wavelength of the raman scattered
write the empirical formula for at least four ionic compounds that could be formed from the following ionsco3 2- anion
based on epa estimated carbon credits value of 70 per metric ton of carbon in 2050 estimate the financial value of the
a laser beam shines onto a slit of width 01 mm and the diffraction pattern is projected onto a screen 2 m from the slit
a car traveling on a flat unbanked circular track accelerates uniformly from rest with a tangential acceleration of 220
in a certain library the first shelf is 150 off the ground and the remaining four shelves are each spaced 320 above the
the diameters of the main rotor and tail rotor of a single-engine helicopter are 767 m and 105 m respectively the