Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 7 Answered

Why is the atmosphere very dense near the surface of the earth?
Asked by majhiraj546 | 15 May, 2019, 12:17: PM
answered-by-expert Expert Answer
If speed of gas molecules on earth surface or atmosphere is greater than the escape velocity, then gas molecues will escape.
Escape velocity on earh surface is 11.2 km/hr.
 
Kinetic speed of gas molecules at the temperature of earths surface and atmosphere is less than escape velocity.
Hence heavier gas molecules like O2, N2 and CO2 are present in atmosphere, where as lighter molecules like hydrogen and
Helium are present in insignificant amount in atmosphere
Answered by Thiyagarajan K | 15 May, 2019, 03:30: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
ICSE 7 - Physics
measurement is a comparison of unknown quantity with know.quantity of same kind is called unit
Asked by singhshriti444 | 11 Mar, 2024, 12:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
iron rims are heated before they are fixed on the wooden wheels explain
Asked by kalamng19 | 15 Jan, 2024, 07:51: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
Define electromagnet. What are the uses of electromagnet
Asked by ummeshidramiss | 15 Jan, 2024, 10:35: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
How does an electric circuit work ?  
Asked by miloni77 | 05 Jan, 2024, 07:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
explain the heating effect of electric current.
Asked by thangarajn1980 | 15 Dec, 2023, 05:52: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
Does sound get refracted? if yes then why and how?
Asked by nehavatsa1984 | 18 Nov, 2023, 11:40: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
If a boy crosses a road distancing 600m in 5 minutes what will be the boys average speed? 
Asked by p2568jiyona | 24 Sep, 2023, 04:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
Convert 54 km/hr into m/s
Asked by jyotinemade61 | 24 Jul, 2023, 04:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
why is an object transparent or opaque
Asked by subhitabatar9461055901 | 23 Jun, 2023, 09:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Physics
if the net force on a body is more will the acceleration be more or less ?
Asked by dhakankar | 20 Jun, 2023, 08:51: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×