The sentence, which most accurately describe compounds is this: THEY HAVE A UNIQUE SET OF PROPERTIES THAT CAN BE USED AS IDENTIFIERS.
Compounds are formed when two or more elements combine together in a specific mass ratio. Compounds normally have some properties which can be used to identify them. For instance, water as a compound has the following physical properties: it is odorless, colorless, neutral to litmus paper, it is a liquid at room temperature, it has a boiling point of 100 degree Celsius and a freezing point of zero degree Celsius. All these properties can be used to identify water in case it is given to us as an unknown substance. If the unknown substance does not have all these properties, then it is not water.<span />
No fact to show cause you didnt show no work
The answer is A, I just learned about this a few days ago!
What property/properties of water allowed the water to stick to the penny?
Solution's:
Explanation:
By these properties, the water molecules gets attracted to the other molecules. Hence, this makes the water get stick to the penny.
Answer:
r = 0.664 m.
Explanation:
Let's write the equation of the magnetic force, the blacks syndicate vectors
F = q v x B
From this expression we see that the force is perpendicular to the velocity and the field, so it is a centripetal force, the modulus of the force is
F = q v B sinT
We write Newton's second law
F = m a
a = v² / r
q v B sinT = m v² / r
r = m v / (q B sinT)
Let's calculate
r = 9.1 10-31 2.9 107 / (1.6 10-19 1.7 10-3 sin8.4)
r = 26.4 10-24 / 0.3973 10-22
r = 0.664 m
This is the distance from where the electron penetrates
