I need you to answer the following questions: 1- If you are to measure the laten

Question

I need you to answer the following questions:

1- If you are to measure the latent heat of vaporization of water, would you follow a similar procedure? Explain

2- Before giving you an injection. a physician swabs your arm with isopropyl alcohol at room temperature. Why do this make your arm feel cold? (Hint: The reason is not the fear of injection!)

3-  When a car is driven some distance, what happens to the air pressure in the tires? Why?

4- On a chilly morning you can "see your breath". What are you actually seeing? What factors influence this phenomenon?

Explanation / Answer

1-WHAT DO YOU MEAN BY SIMILAR PROCEDURE? YES THE CONVENTIONAL PROCEDURE IS FINE.

2-THIS IS DUE TO EVAPORATION. EVAPORATION PRODUCE COOLING EFFECT.

3-INCREASES. BECAUSE THE TEMPERATURE INSIDE RISE DUE TO THE FRICTION BETWEEN THE TYRE AND THE ROAD.

4-WE SEE THE HUMIDITY OR THE WATER VAPOUR FROM OUR MOUTH WHICH GETS CONDENCED DUE TO LOW TEMERATURE OUTSIDE AND CONVERTING IT TO WATER DROPLETS.

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