Answer:
For 6 its D
For 7 its A
For 8 its C
For 9 I think its B but Im not sure
It's <span>Argon
about 1% in the atmosphere</span>
-- Gold is a more dense substance than iron. At 19.3 times the density
of water, it's in the top few most dense substances in all of nature.
The density of iron is only 7.87 ... only 40% the density of gold !
-- Density doesn't depend on how much of the substance you have.
A flake of gold foil is still more dense than an iron battleship.
Let's use the equations for rectilinear motion. One particular equation is:
d = v₀t +(1/2)at²
Since it has been mentioned that the object starts from rest, then v₀ = 0. Substituting the values,
40 m = (0)(4 s) + (1/2)(a)(4 s)²
Solving for a,
a = 5 m/s²
<em>Therefore, the acceleration due to gravity is 5 m/s².</em>
