Download App

P-1 Heat — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-1 Heat3 Marks
Question
Write short notes :
Relative Humidity
✓

Answer

(i) The ratio of actual mass of vapor content in the air for a given volume and temperature to that required to make the air saturated with vapor at that temperature is called the relative humidity.
% relative humidity
$=\frac{\begin{array}{c}\text { Actual mass of water vapour in the air } \\ \text { in a given volume }\end{array}}{\begin{array}{c}\text { Mass of water vapour required to } \\ \text { saturate the same volume at same } \\ \text { temperature. }\end{array}} \times 100$
(ii) The relative humidity at the dew point is 100%. If the relative humidity is more than 60% we feel that the air is humid.
(iii) If the relative humidity is less than 60%, we feel that the air is dry.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions: [3 M]" from P-1 Heat→P-1 Heat — all question types→Science STD 10 question papers→Maharashtra Board STD 10 question papers→Maharashtra Board question paper generator→

Similar questions

Find the amount of heat needed to raise the temperature of a piece of iron of mass 500 g by 20 °C. (c = 0.110 cal/g.°C)
→
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br.
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
→
What are the different ways in which glucose is oxidised to provide energy in various organisms? Give one example of each.
→
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
→
Draw a diagram to show how a converging lens held close to the eye acts as a magnifying glass. Why is it usual to choose a lens of short focal length for this purpose rather than one of long focal length?
→
An object $4\ cm$ high is placed at a distance of 10cm from a convex lens of focal length $20\ cm.$ Find the position, nature and size of the image.
→
Draw a neat and labelled diagram of female reproductive system and give the functioN of :
i. Oviduct
ii. Ovary
iii. Uterus
→
A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads:
Left eye: +2.50D, Right eye: +2.00D
  1. State whether these lenses are thicker in the middle or at the edges.
  2. Which lens bends the light rays more strongly?
  3. State whether these spectacle lenses will converge light rays or diverge light rays.
→
What is bauxite? What are the main impurities found in this ore?
→
Find the amount of heat needed to raise the temperature of a silver container of mass 100 g by 10 °C. (c = 0.056 cal/g °C)
→