QQuestionPhysics
QuestionPhysics
"Which of the following is a reasonable mass for a pencil?
A. 15 kg
B. 15 g
C. 15 mg
D. 15 µg"
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Understand the context
A pencil is a common writing instrument made of wood and graphite. We need to estimate a reasonable mass for a typical pencil.
Step 3:: Consider typical masses of everyday objects
- 15 kg is extremely heavy (about the weight of a large dog or a small child) - 15 mg is extremely light (almost microscopic) - 15 µg is impossibly light (smaller than a grain of dust) - 15 g is in the range of small, lightweight objects
Step 4:: Estimate a pencil's typical mass
- A standard wooden pencil typically weighs between 5 - 10 grams - This means 15 g is very close to a realistic pencil mass
Step 5:: Eliminate unreasonable options
- A. 15 kg is far too heavy - C. 15 mg is far too light - D. 15 µg is impossibly light
Step 6:: Verify the reasonable option
- B. 15 g falls within the expected mass range for a typical pencil
Final Answer
B. 15 g is a reasonable mass for a pencil.
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