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a cepheid variable in a nearby galaxy looks 106 times fainter than an identical cepheid in the milky way the cepheid in
a spy satellite circles the earth at an altitude of 160 km and carries out surveillance with a special high-resolution
an elderly sailor is shipwrecked on a desert island but manages to save his eyeglasses the lens for one eye has a power
a glass plate n 161 is covered with a thin uniform layer of oil n116 a light beam of variable wavelength is normally
an x-ray photon with a wavelength of 0240 nm scatters from a free electron at rest the scattered photon moves at an
a box weighing 215 n is placed on an incline plane that makes an angle of 350 with the horizontalcompute the component
a wheel rotates through an angle of 138rad as it slows down from 220 rads to 135 rads what is the magnitude of the
an intergalactic rock star bangs his drum every 150 s a person on earth measures that the time between beats is 230 s
a light board 10m long has two supports one at one edge of the board and a second at the mid point a 40n weight is
how many kilocalories of heat are released when 75g of steam at 100 celsius is converted to ice at 0 celsius if you
how do i convert benzene to m-bromoaniline using hno3h2so4 and br2fe2br3 and snhcl what is the correct order of the
what is the ration of the concentrations of h2po4- and hpo42- at a ph 70 b ph 75 c ph 80supposedly the pka is 721 and
a loop of diameter d 10 cm carrying a current i 02 a is placed inside a magnetic field b 03 t k hat the normal to
white light reflected at perpendicular incidence from a uniform soap film has an interference maximum at 600 nm and a
light from an argon laser strikes a diffraction grating that has 5306 lines per centimeter the central and first-order
a two narrow slits 0204 mm apart are illuminated by light of wavelength 580 nm the light falls on a screen 148 m away
why is cycloheptatrienone stable while cyclopentadienone is quite unstable explainthe difference in their
at their closest approach venus amp earth are 420 x 1010m apart the mass of venus is 487 x 1024 kg the mass of earth is
a saturated solution was formed when 551times10-2 of argon at a pressure of 10 and temperature of 25 was dissolved in
the following is adapted from an environmental engineering pe exam the total phosphate concentration totpo4 in a river
a ball rolls down a board which is 20 degrees to the horizontal this time there is a coefficient of kinetic friction of
some asteroid named briggie has been discovered revolving around the sun on a circular orbit with a period of 390 years
light from a helium-neon laser 630nm is incident on a diffraction grating and then illuminates a screen that is 10 m
tartaric acid is the white powdery substance that coats sour candies such as sour patch kids combustion analysis of a
a helium-neon laser 630 nm is used in a single-slit experiment with a screen 75 m away from the slit if the slit is