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                              Q:
                           
                           
                                                      | A) Barkometer | B) Bolometer | 
| C) Spectrometer | D) Barometer | 
                              Answer:   D) Barometer
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
Air Pressure can be defined as the pressure of air in the earth's atmosphere. It reaches a maximum of about 100,000 Pa near sea level and decreases as altitude increases.
The barometer is an instrument which is used for measuring Air pressure.
Physics instruments and their uses:
Barkometer - - - Tanning liquors used in tanning leather
Bolometer - - - Electromagnetic radiation
Spectrometer - - - Properties of light.
 
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