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suppose helium nuclei has exactly the same mass as adding two single protons and neutrons the suns luminosity would bea
the low range of frequencies used for medical applications is about 1000000 hz what is the wavelength of this frequency
neon lamp spectrum shows many more distinct lines than that of hydrogen lamp the reason is thata neon lamp is brighterb
three helium nuclei fuse together forming one carbon nucleus the mass of carbon is less than three times the mass of
sound from the siren of an emergency vehicle has a frequency of 7500 hz and moves with a velocity of 3430 ms what is
a warning buoy is observed to raise every 50 s as crests of waves pass by ita what is the period of these wavesb what
a submarine sends a sonar signal which returns from another ship 2250 s later how far away is the other ship if the
what is a by-product that could form from the condensationelimination of 13-diphenylacetone in a reaction with benzil
police investigators examining the scene of an accident involving two cars which nearly came to a stop before colliding
calculate the oh concentration of a solution of na2cro4 0225m the sodium salt of chromic acid chromic acid is h2cro4 a
a person stands on a bathroom scale in a motionless elevator when the elevator begins to move the scale briefly reads
a ball is thrown horizontally from the roof of a building 450m tall and lands240m from the base what was the balls
calculate the concentration of cro42- in a solution that is 00375m in chromic acid and 0150m hcl chromic acid is h2cro4
the summit of a mountain 2450m above base camp is measured on a map to be 4580m horizontally from the camp in a
when an aqueous solution that is 1m each in hcl zncl2 and cobr2 is electrolyzed the elemental products formed initially
you see condensed steam expelled from a ships whistle 250 s before you hear the sound if the air temperature is 200
based on their reduction potentials what are the most likely cathode products in the electrolysis of an aqueous
as two boats approach the marina the velocity of boat 1 relative to boat 2 is 213 ms in a direction 403deg east of
two small plastic balls hang from threads of negligible mass each ball has a mass of 054 g and a charge of magnitude q
describe the preparation of 12 ml of a 0050 m solution of each of the halogens using the reactions in the preceding
what is the standard free energy change for the solubility of agcl in water ksp of
two closely spaced circular disks form a parallel-plate capacitor transferring 8900times109 electrons from one disk to
two identical balloons are filled with the same volume one with air and one with helium the next day the volume of the
a helicopter blade spins at 115 revolutions per minute its tip is 700 m from the center of rotationa calculate the
a segment of a dna strand has base sequence of c-g-a-t-t-g-c-a what is the base sequence of the other complementary