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a star of mass 185times1031 kg and diameter 820e9 m rotates with a period of 270 days suddenly the star changes size
when viewed in a spherical mirror the image of a setting sun is a virtual image the image lies 130 cm behind the
the image behind a convex mirror radius of curvature 92 cm is located 8 cm behind the mirrora where is the object
the outside mirror on the passenger side of a car is convex and has a focal length of -85 m relative to this mirror a
uniform thin rod of length l25 m and mass 2 kg can rotate in a horizontal plane about a vertical axis through its
asteroid 433 eros is one of the largest near-earth asteroids for purposes of this problemassume it is spherical the
alice made a telephone call from her home telephone in new york to her fiance stationed in baghdad about 10000km away
an astronaut weighs 275 lbs with equipment here on the surface of the earth if he goes to a planet where the
a flashlight contains two batteries in series each having a potential difference of 15v and an internal resistance of
two 60 ohm resistor are connected in parallel this parallel arrangement is connected in series with a 30 ohm resistor
a geostationary communications satellite orbits the earth directly above the equator at an altitude of 35800 km
a 4kg cart is initially moving at 3ms on a frictionless track it then hits an incline and stops 2m latera what is the
the biological activity of some organs can be investigated using radioactive isotopes for example iodine is important
the radioactive isotope has a half-life of 260 y and has a half-life of 870 days they each emit positive beta-
the intensity 18m from a source of sound is measured to be 10-4wm2a determine the intensity of the sound in decibelsb
the sound level szlig measured at a radius r 1100 meters from a point sound source that is emitting sound equally in
05g of zinc is added to 35 l of 0005m hydrochloric acid1 what is the ph and poh of the acid solution2 assuming 100
consider a rigid insulated box containing 0400 mol of heg at 300degc and 100 atm in one compartment and 0600 mol of n2g
you are given a 100 ml solution of 100 m cl- and told to verify the chloride concentration by gravimetric analysis 100
a 250 g sample of a bronze gong was cut out and dissolved in suklfuric acid the copper sulfate produced was mixed with
hydrobromic acid aluminum hydroxide -gt water aluminum bromide was double displacement but i got it wrong what type
a 129 molar aqueous solution of ethanol at 20 degrees celcius has a density of 872 gml after dilution with water to 812
a sample consisting of 227g of a nongaseous unstable compound x is placed inside a metal cylinder with a radius of 800
how much heat is released when 105g of steam at 1000 degrees celsius is cooled to ice at -150 degrees celsius the