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Questions and Answers
What is the primary characteristic that distinguishes scalar quantities from vector quantities?
What is the primary characteristic that distinguishes scalar quantities from vector quantities?
- Scalars have direction, while vectors do not.
- Scalars can only be positive values, while vectors can be negative.
- Scalars only have magnitude, while vectors have both magnitude and direction. (correct)
- Scalars can change over time, while vectors remain constant.
How would you calculate the total mass of a climber and their backpack?
How would you calculate the total mass of a climber and their backpack?
- Average the mass of the climber and the backpack.
- Multiply the mass of the climber by the mass of the backpack.
- Add the mass of the climber to the mass of the backpack. (correct)
- Subtract the mass of the backpack from the mass of the climber.
What operation can be performed on scalar quantities to find the change in temperature of a room heated from 12°C to 21°C?
What operation can be performed on scalar quantities to find the change in temperature of a room heated from 12°C to 21°C?
- Add the initial temperature to the final temperature.
- Subtract the initial temperature from the final temperature. (correct)
- Multiply the initial temperature by the final temperature.
- Calculate the average of the initial and final temperatures.
What is an example of a scalar quantity?
What is an example of a scalar quantity?
What happens when scalar quantities are combined?
What happens when scalar quantities are combined?
Flashcards
Scalar quantity
Scalar quantity
A physical quantity that has only magnitude (size), but no direction.
Magnitude
Magnitude
The size or amount of a physical quantity.
Adding scalar Quantities
Adding scalar Quantities
Adding scalar quantities is straightforward, simply adding their values together. Example: A 75 kg climber carrying a 15 kg backpack has a total mass of 75 kg + 15 kg = 90 kg.
Subtracting scalar Quantities
Subtracting scalar Quantities
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Study Notes
Physical Quantities
- Physical quantities are measurable.
- They are categorized as scalars and vectors.
- Scalars have only magnitude (size).
- Vectors have magnitude and direction.
Scalar Quantities
- Scalar quantities are added by summing their values.
- Example: Calculating total mass of a climber and backpack: 75 kg (climber) + 15 kg (backpack) = 90 kg
- Scalar quantities are subtracted by subtracting their values.
- Example: Calculating temperature increase from 12°C to 21°C: 21°C - 12°C = 9°C
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