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find the speed of sound in a thin rod of copper which has a sheer modulus of 45 1010 pa and a density of 890 103 kgm3
calculate the delta h reaction for the combustion of glucose c6h12o6 using delta hf knot values calculate the delta hf
a 16-m-long string fixed at both ends vibrates at resonant frequencies of 768 hz and 1152 hz with no other resonant
what is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number
a lens for a 35-mm camera has a focal length given by f 43mm how close to the film should the lens be placed to form a
a spherical water drop 42 m in diameter is suspended in calm air due to a downward-directed atmospheric electric field
use the heisenberg uncertainty principle to calculate the uncertainty in meters in the position of a honeybee weighing
a water pump lifts water from a well depth of 30 to the ground level how much work does the pump do by moving 2 m3 of
a child throws a stone from the top of a 15 m cliff with a speed of 20 ms if the stone weights 2 n find its kinetic
a 200 ohm resistor is rated at 14 wa what is the maximum current it can drawb what is the maximum voltage that should
a calorimeter contains 270 g of water at 110 c when 210 g of x a substance with a molar mass of 800 g is added it
a submerged scuba diver looks up toward the calm surface of a freshwater lake and notes that the sun appears to be 32
a piece of chocolate cake contains about 400 calories a nutritional calorie is equal to 1000 calories thermochemical
two people carry a heavy electric motor by placing it on a light board 250m long one person lifts at one end with a
why pure oxygen is often administered to victims of co poisoning explain using le chateliers principle hb co aq o2 aq
calculate the heat capacity of satan i e ni if 300g of nickel at 1000 c raises the temperature of 250g of water from
transverse waves with a speed of 535 ms are to be produced on a stretched string a 435-m length of string with a total
the isotope 22na has a half-life of 260 years how much of a 100 gram sample would be left after 100
bromocresol green ka 20x10-5 is yellow in its protonated form hx and blue in its ionized form x- at what ph will
suppose 050 moles of a substance reacts in 250 grams of water if the water temperature goes from 22 degrees c to 26
two large parallel metal plates are uniformly and oppositely charged and the electric field between them is 76 x 106 nc
blue light of frequency 60 1014 hz falls on the surface of potassium which has a work function of 226 ev find the
a research group plans to construct an engine that extracts energy from the ocean using the fact that the water