Podcast
Questions and Answers
Which of the following best explains why sprinkling water on a roof on a hot day cools the surface?
Which of the following best explains why sprinkling water on a roof on a hot day cools the surface?
- The water absorbs heat from the roof as it evaporates, utilizing the large latent heat of vaporization. (correct)
- The water increases the thermal conductivity of the roof, allowing heat to dissipate more quickly.
- The water creates a barrier that prevents heat from entering the building.
- The water reflects sunlight, reducing the amount of heat absorbed by the roof.
Why does acetone on your palm make it feel cool?
Why does acetone on your palm make it feel cool?
- Acetone absorbs heat from your body as it evaporates. (correct)
- Acetone has a naturally low temperature.
- Acetone reacts chemically with sweat, producing a cooling effect.
- Acetone blocks nerve receptors in your skin.
Water droplets form on the outside of a glass of ice water because:
Water droplets form on the outside of a glass of ice water because:
- Water vapor in the air condenses when it comes into contact with the cold surface of the glass. (correct)
- The ice melts and the water overflows onto the outside of the glass.
- The glass is porous and allows water to seep through.
- The cold temperature causes the glass to secrete water.
Why is cotton preferred for clothing in summer?
Why is cotton preferred for clothing in summer?
During evaporation, what energy change occurs at the surface of a liquid?
During evaporation, what energy change occurs at the surface of a liquid?
How does the latent heat of vaporization contribute to the cooling effect of evaporation?
How does the latent heat of vaporization contribute to the cooling effect of evaporation?
Which of these factors most significantly affects the rate of evaporation?
Which of these factors most significantly affects the rate of evaporation?
Why do desert coolers work more effectively on hot, dry days compared to humid days?
Why do desert coolers work more effectively on hot, dry days compared to humid days?
How does an earthen pot (matka) keep water cool during summer?
How does an earthen pot (matka) keep water cool during summer?
Why is it easier to sip hot tea from a saucer than from a cup?
Why is it easier to sip hot tea from a saucer than from a cup?
Flashcards
Why does acetone cool your palm?
Why does acetone cool your palm?
Particles gain energy from your palm or surroundings and evaporate, cooling the skin.
Why sprinkle water on hot surfaces?
Why sprinkle water on hot surfaces?
High latent heat of vaporization cools the surface.
What happens during evaporation?
What happens during evaporation?
During evaporation, the particles at the surface of liquid gain energy and change into vapor.
Why wear cotton in summer?
Why wear cotton in summer?
Signup and view all the flashcards
Why do water droplets form on a cold glass?
Why do water droplets form on a cold glass?
Signup and view all the flashcards
Why does a desert cooler work?
Why does a desert cooler work?
Signup and view all the flashcards
The 3 states of matter?
The 3 states of matter?
Signup and view all the flashcards
Study Notes
- Pouring acetone (nail polish remover) on a palm causes a cooling sensation as the particles gain energy and evaporate.
- Sprinkling water on roofs or open ground after a hot day cools the surface due to the large latent heat of vaporization of water.
- During evaporation, particles at the liquid's surface gain energy from surroundings/body, changing into vapor.
- Heat energy equal to the latent heat of vaporization is absorbed, leaving the body cool.
- Cotton is worn in summer because it is a good absorber of water, aiding sweat absorption and evaporation.
- Water droplets appear on the outer surface of a glass containing ice-cold water because the water vapor in the air loses energy upon contact with the cold class and condenses into liquid.
- Matter consists of small particles.
- Matter commonly exists in three states: solid, liquid, and gas.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
