Need help with Finding absolute magnitude

  • Thread starter Thread starter Michael c17
  • Start date Start date
  • Tags Tags
    Absolute Magnitude
Click For Summary
To find the absolute magnitude (Mv) using the given period (P = 7), the relevant equation is Mv = -[2.76(log10(P) - 1.0)] - 4.16. The user is seeking assistance in evaluating this equation but lacks a suitable calculator. Forum members suggest using online calculators or smartphone apps that can handle logarithmic functions. It's clarified that the user needs to evaluate the expression rather than solve an equation. The discussion emphasizes the importance of understanding the calculation process and available tools.
Michael c17
Messages
2
Reaction score
0
Homework Statement
Need to solve this equation
Relevant Equations
Mv = - [2.76 (log10(P) - 1.0)] - 4.16
P is = to 7 and I don't know how to get the absolute magnitude please help.
 
Physics news on Phys.org
Michael c17 said:
Homework Statement:: Need to solve this equation
Relevant Equations:: Mv = - [2.76 (log10(P) - 1.0)] - 4.16

P is = to 7 and I don't know how to get the absolute magnitude please help.
Please post the whole question as given to you. Define any variables that would only be obvious to someone versed in astronomy.
The "relevant equations " section is for standard equations, not any that only relate to the given problem. Maybe that is a standard equation.. I don't know.

And, per forum rules, please show some attempt, or at least provide your thinking so far.
 
I don't understand what your saying, there is the equation and 7 is P I just need someone to plug it in and give me Mv since I don't have a calculator that can do that. Sorry I'm not versed in your forum rules. I'm just trying to find the absolute magnitude of a star using only the period in days which is 7.
 
Michael c17 said:
I just need someone to plug it in and give me Mv
That's a key piece of information right there, that Mv (##M_v##?) is one variable, not two.
You confused me by saying you needed to solve the equation. What you are asking for is merely to evaluate an expression.

I find it hard to believe there exists any calculator that cannot do this. Just google online calculator and you will find several.
If you mean that you cannot do the whole expression in one hit, just do it in stages.
 
  • Like
Likes Steve4Physics
@Michael c17, have you a smart-phone? My (low-end) phone has a calculator which includes 'advanced options' with log₁₀, brackets, trig' functions, etc. Check yours if you have one.
 
If have close pipe system with water inside pressurized at P1= 200 000Pa absolute, density 1000kg/m3, wider pipe diameter=2cm, contraction pipe diameter=1.49cm, that is contraction area ratio A1/A2=1.8 a) If water is stationary(pump OFF) and if I drill a hole anywhere at pipe, water will leak out, because pressure(200kPa) inside is higher than atmospheric pressure (101 325Pa). b)If I turn on pump and water start flowing with with v1=10m/s in A1 wider section, from Bernoulli equation I...

Similar threads

  • · Replies 8 ·
Replies
8
Views
1K
Replies
6
Views
3K
  • · Replies 3 ·
Replies
3
Views
799
Replies
3
Views
1K
  • · Replies 3 ·
Replies
3
Views
926
  • · Replies 8 ·
Replies
8
Views
2K
Replies
4
Views
751
  • · Replies 30 ·
2
Replies
30
Views
2K
Replies
17
Views
2K
Replies
10
Views
2K