Tag: understanding communication and impact of mass media

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Multiple choice physics artificial satellite communication and mass media understanding communication and impact of mass media satellites in communication

A remote -sensing satellite of earth revolves in a circular orbit at a height of $ 0.25 \times 10^6 $ m above the surface of earth. if earth's radius is $ 0.25 \times 10^6 $ m above the surface of earth. if earth's radius is $ 6.38 \times 10^6 m $ and $ g= 9.8 m/s^2 $, then the orbital speed of the satellite is :

  1. $6.67 km/s$

  2. $7.76 km/s$

  3. $8.56 km/s$

  4. $9.13 km/s$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice physics artificial satellite communication and mass media understanding communication and impact of mass media satellites in communication

State the chronological order in which the following events took place.
$1$. Launching of APPLE
$2$. Launching of Rohini
$3$. Antarctica expectation
$4$. Indian cosmonaut

  1. $2 - 1 - 3 - 4$

  2. $2 - 3 - 1 - 4$

  3. $3 - 1 - 2 - 4$

  4. $4 - 1 - 2 - 3$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

a) Lunching of Apple - $1$ April, $1976$

b) Lunching of Rohini - $10$ Aug, $1979$
c) Indian cosmonaut - $1982$
(i.e. Rakesh Sharma, Indian air force pilot)
d) Antarctica expectation - $1965$
So, order is $d-a-b-c$.