4 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Choosing a Gauge for a Model Channel 4 questions
Choosing a Gauge for a Model Channel
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A model channel carries a rinse solution past a sensor. The channel works only if its width is at most 1.00 mm. A gauge’s maximum error means the actual width can be that much above or below its reading. The class approves a channel only when every width in the resulting range meets the limit.
| Gauge | Displayed width (mm) | Maximum error (mm) |
|---|---|---|
| P | 0.96 | 0.06 |
| Q | 0.98 | 0.01 |
| R | 1.01 | 0.02 |
Question 1
Which gauge reading is enough to approve the channel under the rule?
- P only
- Q only
- P and Q only
- R only
Question 2
Find the range of possible widths for the P reading. Use the stated maximum error.
Write your answer and work on the printable worksheet, or answer online.
Question 3
A student says R proves the channel is too wide. Evaluate the claim using the R range.
Write your answer and work on the printable worksheet, or answer online.
The class confirms that Q and R measured the same unchanged channel and that both stated error bounds apply.
Question 4
Find a width that fits both the Q and R readings, or explain why there is none. Use both ranges to decide whether the channel can be approved under the stated rule.
Write your answer and work on the printable worksheet, or answer online.
2025 Chemistry Reference Tables · Browse Chemistry worksheets