Humid or dry air
When do you feel more sweaty, in dry or humid air?
What is humid air
The air in a room has 15 g of water vapour per cubic metre. However, for saturation, one cubic metre of volume requires 20 g of water vapour. What is the relative humidity?
What is 75%
Which is the number of the chapter we have just been through?
What is chapter 8?
Who has a twin, Nikolaj or Magnus?
Who is Magnus?
What is used to meassure the temperature of air?
Thermometer
After a rain shower does the air then feel more humid or dry?
What is humid?
On a particular day, the realitive humidity is 100% and the room temperature is 30 C. What is the dew point? The saturated vapour pressure of water at 30 C is 42400 Pa.
What is 42400 Pa
What does S.V.P. stand for?
What is saturation vapour pressure
Who is the oldest Nikolaj or Magnus?
Who is Nikolaj?
What is a barometer used to meassure?
What is the pressure of the air around us?
Is it better to store pharmaceutical drugs in humid or dry air?
What is dry air.
Magnus has just taken a shower and the relative humidity increased from 30% to 85 %, what is the increase in percent?
283%
Name four factors which have an impact on evaporation?
What is nature of liquid, wind, temperature, surface area, vapour in the air
Which major city in Denmark are we from?
What is Aarhus?
Wich instrument is used to meassure the pressure inside an enclosed space?
Manometer
Is it better to fly a plane in humid or dry air? Explain why.
What is dry air. Because dry air is more dense and it is better for the engine.
The relative humidity of a place was meassured at 25 degrees celcius and found to be 64%. If the absolute humidity is 24 grams pr. cubic metre, determine the actual water vapour density at this temperature.
15,36 grams pr. cubic metre
What is the cause of dew?
What is a drop in temperature (so that the air becomes saturated)
Who is the best at cooking Nikolaj or Magnus?
Who is Nikolaj?
What is a hygrometer?
If the amount of water vapour in the air stays the same, and the temperature rises does the air then feel more dry or humid?
What is dry air
A mass of air at 20 degrees celcius has a relative humidity 36%. If the air is cooled to 16 degrees celcius, what will its relative humidity be? Saturation vapour pressre at 20 degrees celcius and 16 degrees celcius are 17.5 mmHg and 13.6 mmHg, respectively?
What is 46%
Why is warmer air able to hold more vapour?
What is the molecules move faster which makes it more likely for the molecules to be in the gas phase?
Who of Nikolaj and Magnus has a girlfriend?
Who is neither?
If a hygrometer reads 22 degrees celcius in the dry bulb thermometer and 22 degrees in the wet bulb thermometer what is the relative humidity then equal to?
What is 0%?