A substance with LOW pH. The lower the pH, the higher the acidity level is. pH has a direct effect on how acidic a substance is. For an example, battery acid. Battery acid has a pH level of about 1. This means that battery acid is very acidic. A substance is concidered acidic when it dips below the neutral pH level of 7.
'Newton' is [ kg·m/s² ].
So if you divide Newtons by [ m/s ], it goes something like this:
(kg·m/s²) / (m/s) =
(kg·m/s²) · (s/m) =
(kg·m·s / m·s²) =
kilogram / second .
This is an interesting exercise in manipulating units, but it doesn't seem to mean anything in the real world.
We performed one meaningless operation ... dividing force by speed ... and ended up with another quantity that has no physical significance ... kilogram per second.
Answer:
True
Explanation:
Stellar-sized black holes form when a star explodes in a supernova is a true statement. Supernova occurs when a huge size star collapses into itself. This explosion is massive such that parts of the stars are thrown apart. And this phenomenon gives rise to super massive black holes. Supernova occurs when the core becomes very heavy and star is not able to hold its won weight.
Physical changes do not change the identity of the substance. Heat causes chemical reactions. You cannot see chemical changes with the naked eye. The identity of a substance changes like when you burn paper, from paper it turns into ash and produces smoke, which are products from the chemical reactions.
Density is the mass of a substance every a unit of volume. Therefore, the formula to count density would be mass/volume. The calculation for this problem should be:
density= mass/volume
density= 43 grams / 14 cm^3= 3.07gram/cm^3 or 3.07 gram/ml