Apr 8, 2016 · Tends to be more of a cultural expression than one of physics - any act that appears to defy what we understand about gravity. Some cultural examples might be: high wire trapeze artists who appear to "defy gravity" or magicians how appear to "defy gravity" by floating someone in mid-air unsupported. In all of these cases, there is no gravity defying, but a reasonable …

Apr 2, 2016 · Gravity works the same way in water that it works in air or a vacuum -- but you have to consider the force of gravity on the water as well as on the object you put into it. When you put something in water, gravity can pull the object down through the water only if an equal volume of water is allowed to go up against the force of gravity; this is called displacement. In effect …

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Jan 27, 2016 · The acceleration of gravity (also referred to as the gravitational field strength) at the surface of the earth has an average of 9.807 m/s^2, which means that an object dropped near earth's surface will accelerate downward at that rate. Gravity is a force, and according to Newton's Second Law, a force acting on an object will cause it to accelerate: F=ma Acceleration is a …

Jan 22, 2018 · Here's what I got. The idea here is that the specific gravity of a substance is calculated by dividing the density of that substance by the density of a reference substance, which is usually water at 4^@"C". "SG" = rho_"substance"/rho_ ("H"_2"O at 4"^@"C") This means that in order to find the density of a substance, you must multiply its specific gravity by the density of …

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Aug 18, 2017 · So, for the force of gravity, you can write: #F_g=mg# where #g# is just #9.8"m"//s"^2# And as long as you remember that the force of gravity points downward, you know that, as a force, it should be negative. The magnitude will always be positive regardless, so g is still used and not -g.

Mar 24, 2018 · The acceletation due to gravity is #g=9.8ms^-2# Applying the equation of motion. #s=ut+1/2at^2#

Feb 26, 2018 · Well, first off, we must mention an issue of SAFETY .... "You add ACID to water and NEVER WATER to the acid." Why not? "Because if you spit in acid it spits back....I kid you not." The conc. hydrochloric acid bottle I have in front of me now claims... %34("m/m"), and rho=1.169*g*mL^-1...and thus we work out the "molarity"="moles of solute"/"volume of …

Aug 31, 2014 · Example. Concentrated hydrochloric acid is usually available at a concentration of 37.7% by mass. The density of the solution is 1.19 g/mL.