Why do you weigh slightly less when on a plane that is flying high in the air

Answer is the explanation

Explanation:

By Newtons Law of gravitation,

F = GMm/r², where r = distance between center of gravity of two bodies exerting gravitational force.

Which says, F ∝ 1/r²

When you are flying in an plane high in air the distance between your center of gravity and that of the Earth is bit more than when you are in Earth surface. But due to r² factor, the little difference makes a sensible change which is why you feel slightly less weight when flying in a plane.

the device is called “ rocket engine”

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂