#2: Unit Conversions & Significant Figures

Question 1

How many units are included in the International System Of Units?

Answer 1

Seven:

1. ) m - meter - length
2. ) kg - kilogram - mass
3. ) s - second - time
4. ) A - ampere - electric current
5. ) K - kelvin - temperature
6. ) cd - candela - luminous intensity
7. ) mol - mole - amount of a substance

Question 2

What are all units derived from?

Answer 2

The Seven Bass Units.

Question 3

What is an Exact Number?

Answer 3

Numbers that are defined in a way as to where we know them to an infinite decimal number.

Question 4

What is a Measured Number?

Answer 4

A number in which we do not know the exact number, out to infinity decimal places (as well as an Exact Number.)

Question 5

How is the precision of a Measured Number conserved?

Answer 5

By shortening the number with the use of Significant Figures.

Question 6

What are Significant Figures?

Answer 6

Sig Figs are the digits in a number that we actually know.

Question 7

How much does a kilogram weigh?

Answer 7

The same as the mass of International Prototype of a Kilogram (IPK)

Question 8

What decides how many numbers after the decimal you should have?

Answer 8

The number in the original question that has the fewest numbers after the decimal.

Question 9

What does the superscript of a scientific notation mean?

Answer 9

How many places you move the decimal place.

Question 10

What is 6.0 x 10^-4?

80.0 x 10^3?

Answer 10

.000060

80,000

Question 11

If a subscript in a Scientific Notation is negative, which direction does the decimal go?

Answer 11

Left