Podcast
Questions and Answers
What is the SI unit for measuring mass?
What is the SI unit for measuring mass?
- Meter
- Second
- Kilogram (correct)
- Ampere
Which of the following is a derived quantity?
Which of the following is a derived quantity?
- Mass
- Length
- Time
- Force (correct)
What is the proper unit for measuring temperature in the SI system?
What is the proper unit for measuring temperature in the SI system?
- Celsius
- Ranking
- Kelvin (correct)
- Fahrenheit
When converting from standard form, which step is typically taken first?
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?
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?
If speed is a derived quantity, which base quantities are involved in its calculation?
What does the mantissa represent in standard form?
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?
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?
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?
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?
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?
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?
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?
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?
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?
The mantissa in standard form refers to which part of the number?
Flashcards
What are SI units?
What are SI units?
A system of carefully defined units used globally by scientists to measure all quantities.
What are base quantities?
What are base quantities?
Fundamental quantities like length, mass, and time whose units are used to define all other units.
What are derived quantities?
What are derived quantities?
Quantities derived from the combination of two or more base quantities, like speed (distance/time).
What is standard form (scientific notation)?
What is standard form (scientific notation)?
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What is the mantissa in standard form?
What is the mantissa in standard form?
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What is the exponent in standard form?
What is the exponent in standard form?
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How do you convert from standard form to decimal form?
How do you convert from standard form to decimal form?
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How do you convert from decimal form to standard form?
How do you convert from decimal form to standard form?
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Converting standard form to decimal form
Converting standard form to decimal form
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Converting decimal form to standard form
Converting decimal form to standard form
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Study Notes
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).
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