The Law of Acceleration :
The accaleration if an object depends on the mass of the object and the amount of force applied.
Average density is defined by following formula
here in order to find out the average density of helium we can fill a balloon of helium gas and then we can find it's volume and its mass.
The ratio of mass and volume of that balloon will help us to find the average density of helium
So by the above experiment the average density of helium is approx 0.179 kg/m^3.
Well the only reason I can think of is because of the direction one of the objects is moving would make it difficult.
Answer:
A 0.25 g/cm3
Explanation:
At equilibrium, the buoyant force acting on the block (B, upward) is equal to its weight (W, downward):
where
is the water density
is the part of the volume of the block immersed in the water
g is the acceleration of gravity
is the density of the block
V is the volume of the block
Re-arranging the equation,
where we know:
, since the fraction of volume immersed is 25%
Substituting,
Well, one can take 13 and subtract 56 which is -43.
One can also add 56 to 13 to equal 69.
C is the answer.