the parallactic angle subtended by a distance star is 0.76 on the earth's orbital diameter (1.5*1011m). calculate the distance of the star from the earth..
Answers
Answered by
11
distance of star from earth = D
parallax angle= 0.76 rad
distance between two observation points = d= 1.5 x 10¹¹m
so, as
D = d/ Ф
D= 1.5 x 10¹¹/ 0.76
= 1.97 x 10¹¹m
parallax angle= 0.76 rad
distance between two observation points = d= 1.5 x 10¹¹m
so, as
D = d/ Ф
D= 1.5 x 10¹¹/ 0.76
= 1.97 x 10¹¹m
Answered by
31
Explanation:
In the first tube
Rate of flow = Q
Radius = a
Pressure difference = P
length of the tube = l
coefficient of viscosity = л
From Poiseuille’s equation;
Q= λpa²/ 8лl
Now, let the new rate of flow be Q1,
radius = a/2
pressure difference = 2p
New Poiseulle’s equation;
Q1= λ 2p (a/2)²/8лl
dividing both eq we get
Q1/ Q= 1/8
Q1= Q/8
Similar questions