Pete Bradley
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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 explanation that is consistent with what we know about gravity. For example, magicians will always use some form of wires or ...
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 gravity has to choose which it will pull down, the water or the immersed object. What we call buoyancy is, in effect ...
Jul 10, 2015 · To make 1 L of 1 mol/L HCl, you take 88 mL of the concentrated solution and add water to make a total of 1 L. Assume that you want to prepare 1 L of 1 mol/L HCl.
Jul 16, 2017 · The inner core affects the earth in a number of ways, due to its incredibly high density and temperature. How It Started: As the earth was being formed, it accumulated increasing mass as particles and lumps and meteoroids and asteroids and increasingly larger bodies were drawn in by earth's ever increasing gravity. As the gravity increased, the denser component material was drawn to the center of the earth to form the inner core of mostly iron and nickel with heavy metals added. As the inner ...
Jan 12, 2018 · h = ((GM_E)/(4pi^2)T^2)^⅓ - R_E Geosynchronous means that the satellite has same period as the earth, back to the same place in 24 hours. T =24hrs = 86400 s And let h = height of the satellite from the surface of the earth. r = radius of the satellite from the center of the Earth R_E = earth radius M_E = mass of the earth The gravitational pull from the earth causes the satellite to go in orbit (otherwise it flies away. Hence the gravity is the cause of the centripetal force F_G = m_sv^2/r ...
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 27, 2018 · The centripetal force required for circular motion of the car is provided by the force of friction between the tires and pavement. Due to Newton's Third law of motion, the car experiences centrifugal force which tends to topple it off the road in the outward direction. Force of friction along the radius R is given as f_r= mu_s|vecN| where vecN is normal reaction and =mvecg, where m is mass of car and g is gravity =9.81\\ ms^-2 When the car having velocity v_max is on the verge of skidding ...
Jul 5, 2018 · Center of gravity of a body is the point where the weight of body acts as a whole. The center of gravity shifts towards the side with greater mass. Hence the location of center of gravity of a solid body depends on the distribution of mass i.e. geometrical shape & size etc.
Apr 3, 2017 · The block will move down the plane with an acceleration of =2.82ms^-2 Solving in the direction parallel to the plane F-Wsintheta=m*a F=16N W=mg=30gN The mass is m=30kg The angle is theta=20º So, 16-30gsin20º=30*a 30a=16-100.55=-84.55 a=-84.55/30=-2.82ms^-2
Jan 28, 2018 · Here you go.... Weight of an object on Earth = Gravitational force exerted on an object by the Earth. Let us consider a body having mass "m". mg=G*(mM)/R^2 where, g=acceleration due to gravity, G=Gravitational constant, M=Mass of the Earth, and R=radius of the Earth. Weight of the body (on Earth)= mass(m)*gravitational acceleration(g) Cancel out the m on both sides to get: g=G*M/R^2=(GM)/R^2
