I need you to answer the following questions: 1- If you are to measure the laten
ID: 1265297 • Letter: I
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.