Recent content by Kiwithepike

So three problems I am stuck on. 1.) You have a converging lens with n=1.5,for a symmetric lens so the two lens have same magnitude, what should the radius of curvature be so the focal length is 10cm. I know 1/f = (n-1)[1/r1-1/r2] so that is 1/0.10m =(1.5-1)[1/r1-1/r2] where I am lost is in the...

Homework Statement Consider a particle in one-dimensional so called hyperbolic motion x(t)=\sqrt{b^{2}+t^{2}} where b is a constant. a) Find\gamma(t). b) Find the proper time \tau(t). (assume that \tau=0 when t = 0 c) Find x and v_x as functions of the propertime \tau. d)...

Thank you so much for your help

thats what the text tell you to use. That does seem really simple, maybe that's why I am so lost. B) i know the area A=piab so the way i was looking at it solve for y? then integrate it, with trig sub get pi ab?

zero, so (x-h)^2 = x^2 and (y-k)^2= y^2 right?

(x-h)^2/a^2 + y-k)^2/b^2=1 c^2= a^2 -b^2 while a ≥b>0

A.) Assume a rectangular coord system has its origin at the center of an elliptical planetary orbit and that the coord system x-axis lies along the major axis of the ellipse. Show that the equation for the ellipse is given by x^2/a^2 + y^2/b^2 =1. where a and b are the lengths if the...

ok il make sure to add units, just for clarification is the E i calculated in step B the initial ? and if it's not larger they can't be formed right? thanks for all the help!

heres the first part A. Use wiens law to determine the peak wavelength of blackbody photons where T = 10^9K so λ= 2.9x10^-3 / 10^9 => λ = 2.9x10^-12 then B. use Planck Eq to determine the energy of the photons E = hc/λ => E = (6.6x10^-25)(3x10^8)/ 2.9x10^-12 => E = 6.83x10^-14 C. The...

Homework Statement If positron and electron have the same rest energy can pair production occur?Homework Equations E=hc/λ Plancks equation E=mc^2The Attempt at a Solution so i found the E of the photons using Plancks equation and found the photon E to be 6.83x10^-14 ( should I double this...

so i think i finally got it after some much needed rest, is this correct. M1-M2=2.5log(L1/L2) => 4.8-M1=2.5log(3E-6) => 4.8-M1=-13.8 => M1=18.6? And thank you so much for the help and patience with me!

it doubles as well

ok think I got it, so if mass(s)= 2.0E30kg L(s)= 3.8E26W, and Mass(E)= 6.0E24kg then, L(s)/(s)= x/m(e) yields 1.42E21 W?

Its the measure of the absolute magnitude of luminosity at 10pc.

Hey guys, I am new here so i hope this is in the right place. I just need help with a problem. Suppose the Earth produced as much energy per kilogram each second as the sun does. what would be the total energy output of Earth be? how would the absolute magnitudes compare between the sun and earth