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the drawing shows a person weight w 598 n l1 0849 m l2 0398 m doing push-ups find the normal force exerted by the
the mens world record for swimming 15000 m in a long course pool is 14 min 3456 s how many seconds would it take to
a transparent oil with index of refraction 128 spills on the surface of water index of refraction 133 producing a
a river flows due east at 151 ms a boat crosses the river from the south shore to the north shore by maintaining a
an inventor claims to have a heat engine that has an efficiency of 40 when it operates between a high temperature
when an object moves through a fluid the fluid exerts a viscous force on the object that tends to slow it down for a
an artist statue has a surface area of 146 feet squared the artist plans to apply gold plates to the statue and wants
the average coefficient of volume expansion for carbon tetrachloride is 581 10-4 degc1 if a 585-gal steel container is
the speed of light in a vacuum is 2998x108 ms what is the speed of kilometers per hour what is the speed in miles per
in seawater a life preserver with a volume of 400times102m3 will support a 720kg person average density 980kgm3 with
a solution is prepared by dissolving 258 grams of magnesium chloride mgcl2 in 2500 ml water calculate the molality of
gas is contained in a 900-l vessel at a temperature of 250degc and a pressure of 500 atma determine the number of moles
calculate the content or concentration for each substance in the following mixturesa a solution that contains 250 ml of
a pound of coffee beans yields 50 cups of coffee 4 cups 1 qt how many milliliters of coffee can be obtained from 8 g
in the isothermal compression of an ideal gas the volume occupied by the gas is decreasing but the temperature of the
a large 60g hailstone of ice at 00 celsius falls 150m and undergoes a completely inelastic collision with the eartha
a circular area with a radius of 740 cm lies in the x-y plane 1 what is the magnitude of the magnetic flux through this
benzene is an organic liquid that freezes at 55 degrees celsius how much heat is evolved when 255g of benzene freezes
a hunter wishes to cross a river that is 21 km wide and that flows with a speed of 38 kmh the hunter uses a small
the molar heat of fusion of water is 601kjmol how much heat energy is required to melt one ice cube in a soft drink to
a bicycle tire of radius 038 m has a piece of gum stuck on its rim what is the angle through which the tire rotates
the recommended daily allowance rda of calcium is 1200 mg calcium carbonate contains 12 calcium by mass how many grams
if cholesterol build-up reduces the diameter of an artery by 15 what will be the effect on blood
the density of magnesium is 17 gcm3 and the density of iron is 79 gcm3 consider a block of iron with a mass of 819 g
a uniform board is leaning against a smooth vertical wall the board is at an angle above the horizontal ground the