हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान कक्षा ११

The Weather Report Reads, "Temperature 20°C : Relative Humidity 100%". What is the Dew Point? - Physics

Advertisements
Advertisements

प्रश्न

The weather report reads, "Temperature 20°C : Relative humidity 100%". What is the dew point?

योग

उत्तर

Here,
Relative humidity = 100% 

RH = `"Vapour pressure of air"/"SVP at the same temperature"` = 1

⇒ Vapour pressure of air = SVP at the same temperature 

So , the air is saturated at `20^circ`C . So , dew point is `20^circ` C .

shaalaa.com
Interpretation of Temperature in Kinetic Theory
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Kinetic Theory of Gases - Exercises [पृष्ठ ३७]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
अध्याय 2 Kinetic Theory of Gases
Exercises | Q 46 | पृष्ठ ३७

संबंधित प्रश्न

It is said that the assumptions of kinetic theory are good for gases having low densities. Suppose a container is so evacuated that only one molecule is left in it. Which of the assumptions of kinetic theory will not be valid for such a situation? Can we assign a temperature to this gas?


A gas is kept in an enclosure. The pressure of the gas is reduced by pumping out some gas. Will the temperature of the gas decrease by Charles's low?


Is it possible to boil water at room temperature, say 30°C? If we touch a flask containing water boiling at this temperature, will it be hot?


When you come out of a river after a dip, you feel cold. Explain.


The process on an ideal gas, shown in figure, is


The temperature and pressure at Simla are 15.0°C and 72.0 cm of mercury and at Kalka these are 35.0°C and 76.0 cm of mercury. Find the ratio of air density at Kalka to the air density at Simla.

Use R=8.314J K-1 mol-1


Air is pumped into the tubes of a cycle rickshaw at a pressure of 2 atm. The volume of each tube at this pressure is 0.002 m3. One of the tubes gets punctured and the volume of the tube reduces to 0.0005 m3. How many moles of air have leaked out? Assume that the temperature remains constant at 300 K and that the air behaves as an ideal gas.

Use R = 8.3 J K-1 mol-1


During an experiment, an ideal gas is found to obey an additional law pV2 = constant. The gas is initially at a temperature T and volume V. Find the temperature when it expands to a volume 2V.

Use R = 8.3 J K-1 mol-1


If a = 0.72 and r = 0.24, then the value of tr is ______.


Answer in brief:

Compare the rms speed of hydrogen molecules at 127ºC with rms speed of oxygen molecules at 27ºC given that molecular masses of hydrogen and oxygen are 2 and 32 respectively.


In an ideal gas, the molecules possess


Find the kinetic energy of 5 litres of a gas at STP, given the standard pressure is 1.013 × 105 N/m2.


Energy is emitted from a hole in an electric furnace at the rate of 20 W when the temperature of the furnace is 727°C. What is the area of the hole? (Take Stefan’s constant σ to be 5.7 × 10-8 Js-1 m-2K-4.)


A metal cube of length 4 cm radiates heat at the rate of 10 J/s. Find its emissive power at a given temperature. 


Volume versus temperature graphs for a given mass of an ideal gas are shown in figure at two different values of constant pressure. What can be inferred about relation between P1 and P2?


Two molecules of a gas have speeds of 9 × 10 6 ms−1 and 1 × 106 ms−1, respectively. What is the root mean square speed of these molecules?


For a particle moving in vertical circle, the total energy at different positions along the path ______.


If a = 0. 72 and t = 0.04, then the value of r is ______.


Which of the following materials is diathermanous?


Show that the average energy per molecule is proportional to the absolute temperature T of the gas. 


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×