Answer:
Ozone is a compound.
Explanation:
Elements are simple atoms that can merge or combine to produce a bigger molecule called a compound. They can not be splitted into smaller atoms. Examples are: hydrogen, carbon, etc.
A compound is formed as a result of the combination of two or more elements. They can be splitted into elements. Examples are: ammonium, water, carbon dioxide etc.
Ozone () is a less stable allotrope of oxygen which is made up of three atoms of oxygen. Therefore, it is a compound.
Answer:
Work function,
Explanation:
Given that,
Frequency of light,
Kinetic energy of the ejected electrons,
We need to find the work function of the gold. Let it is W.
Using Einstein's photoelectric equation as follows :
So, the work function of gold is .
Answer:
K = 109.1 N/m
Explanation:
From the question, the following parameters are given.
Extension e = 55 m
Force F = 6000N
According to Hooke's law,
F = Ke
Where K = spring constant.
Substitute F and e into the formula and make K the subject of formula.
6000 = K × 55
K = 6000/55
K = 109.1 N/m
Therefore, the spring constant of a bungee cord that stretches is 109.1 N/m
It is N/C. (Use k=8.99•108 N