College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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### Understanding Atmospheric Pressure at Sea Level

Atmospheric pressure at sea level is 14.7 psi (or lb/in²). How many pascals is this?

#### Choose the correct answer:
- ○ 1010 kPa
- ○ 101 Pa
- ● 101 kPa
- ○ 5700 Pa

### Explanation:
- **14.7 psi (pounds per square inch)** is a common measure of atmospheric pressure at sea level.
- **1 psi** is equal to **6894.76 pascals (Pa)**.
- Therefore, **14.7 psi** is approximately equal to **101,325 Pa** or **101 kPa**.
  
Conversion Formula:
\[ 14.7 \, \text{psi} \times 6894.76 \, \text{Pa/psi} = 101,325.372 \, \text{Pa} \]

Since 1 kPa = 1000 Pa, converting to kPa:
\[ 101,325.372 \, \text{Pa} / 1000 = 101.325 \, \text{kPa} \]

This shows that the atmospheric pressure of 14.7 psi is about 101 kPa. Therefore, the correct answer is **101 kPa**.
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Transcribed Image Text:### Understanding Atmospheric Pressure at Sea Level Atmospheric pressure at sea level is 14.7 psi (or lb/in²). How many pascals is this? #### Choose the correct answer: - ○ 1010 kPa - ○ 101 Pa - ● 101 kPa - ○ 5700 Pa ### Explanation: - **14.7 psi (pounds per square inch)** is a common measure of atmospheric pressure at sea level. - **1 psi** is equal to **6894.76 pascals (Pa)**. - Therefore, **14.7 psi** is approximately equal to **101,325 Pa** or **101 kPa**. Conversion Formula: \[ 14.7 \, \text{psi} \times 6894.76 \, \text{Pa/psi} = 101,325.372 \, \text{Pa} \] Since 1 kPa = 1000 Pa, converting to kPa: \[ 101,325.372 \, \text{Pa} / 1000 = 101.325 \, \text{kPa} \] This shows that the atmospheric pressure of 14.7 psi is about 101 kPa. Therefore, the correct answer is **101 kPa**.
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