Answer:
Negatively charged particles (electrons)
Explanation:
Plastic rod is charged -15.0 nC. It is clear that the charge on the rod is negative so the rod has gain excess of electrons.
When the rod touches a metal sphere charge on the plastic rod remains -10 nC, i.e. negative charge on the rod decreases. This is because negatively charged particles (electrons) are transferred from the plastic rod to the metal sphere.
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
1 electron volt is the energy gained or lost by one electron when it
climbs or falls through a potential difference of 1 volt.
That amount of energy is 1.602 x 10⁻¹⁹ joule (rounded)
3 times that much energy is (3) x (1.602 x 10⁻¹⁹ joule) =
<em>4.806 x 10⁻¹⁹ joule </em>(rounded)
Answer:
10 feet
Explanation:
In a standard procedure, there should be an approximate value of 10 feet between the water pipe and the Earth. This is to prevent the contamination of water and also the corrosion of the water pipe. Most pipes are made of iron and in the presence of water, there can be a chemical reaction between the iron and water in the presence of oxygen.
Answer:
ΔV = -2.1 L
Explanation:
To solve this exercise we can use the ideal gas equation for two points
PV = nRT
P₁V₁ = P₂ V₂
where point 1 is on the surface and point 2 is at the desired depth,
V₂ = 
let's calculate
V₂ = ( 
) 3.5 L
V₂ = 1.4 L
this is the new volume, the change in volume is
ΔV = V₂ -V₁
ΔV = 1.4-3.5
ΔV = -2.1 L
