Foundation Physics PHY 1200 - Standards and Units

What is the SI unit for measuring mass?

Which of the following is a derived quantity?

What is the proper unit for measuring temperature in the SI system?

When converting from standard form, which step is typically taken first?

In the operation of dividing numbers in standard form, what should be done with the exponents?

If speed is a derived quantity, which base quantities are involved in its calculation?

What does the mantissa represent in standard form?

According to the laws of indices, what is the result of multiplying two numbers in standard form?

Which of the following best illustrates a derived unit?

What is the correct exponent for 7 in the standard form representation of 7,000,000,000,000,000,000,000,000,000?

When adding numbers in standard form, which rule should be applied first?

If the derived unit for force is Newton, which base units combine to define it?

Which of the following lists the base quantities and their corresponding SI units correctly?

What is the result of dividing two numbers in standard form with exponents 5 and 3?

Which of the following is NOT a standard SI unit for a base quantity?

The mantissa in standard form refers to which part of the number?

Foundation Physics (PHY 1200) - Standards and Units

The course covers standards and units in physics.
SI units are carefully defined units used globally in scientific measurements.
Base quantities are fundamental quantities, and their units are used to derive other units.
Examples of base quantities and their SI units include:
- Length (meter - m)
- Mass (kilogram - kg)
- Time (second - s)
- Electric Current (ampere - A)
- Temperature (Kelvin - K)
- Amount of Substance (mole - mol)
- Luminous Intensity (candela - cd)
Derived quantities are combinations of base quantities, exemplified by speed (m/s); a derived unit.
Some derived units are commonly used and named (Newton, Joule, etc.).
Newton's Second Law of motion defines force as mass multiplied by acceleration.
The derived unit for force is kg⋅m/s².
Standard form or scientific notation is a way to express very large or very small quantities.
A number in scientific notation is expressed as the product of a coefficient (between 1 and 10) and a power of 10.
Example: 7,000,000,000,000,000,000,000,000,000 atoms can be written as 7 × 10²⁷ atoms.
The coefficient is 7 and the exponent is 27.
Laws of indices (exponents) govern operations with numbers in standard form.
Example operations include addition, subtraction, multiplication and division of numbers in standard form.
Conversion to and from standard form and scientific notation is a crucial skill.
A table of prefixes and their corresponding factors of 10 is provided, with examples of prefixes such as yotta-, zetta-, etc., and their corresponding factors and symbols.
Examples of converting between standard form and scientific notation are provided (213,000,000 = 2.13 × 10⁸ and 0.00872 = 8.72 × 10^-3).
Rules for operating with numbers in standard form include:
- Rule #1: When adding or subtracting, convert to standard form, perform the operation, then convert back to scientific notation.
- Rule #2: When multiplying, multiply the coefficients and add the exponents.
- Rule #3: When dividing, divide the coefficients and subtract the exponent in the denominator from the exponent in the numerator.
Examples of operations with numbers in standard form are demonstrated (1.5 × 10¹⁴ × 4.0 × 10²¹ = 6.0 × 10³⁵ and 6.561 × 10²³ ÷ 3.0 × 10¹³ = 2.1 × 10¹⁰).

Dive into the essential concepts of standards and units in physics with this quiz. Learn about SI units, base and derived quantities, and the importance of scientific notation in expressing measurements. Test your understanding of how these fundamentals shape the study of physics.