Can you help with the last two,Fx' and Fy'

can you do the last subpart?

By using the Euler's identity: ei(theta) = cos(theta) + i*(sin(theta)) Show that 1. cos(theta) = (1/2)(ei(theta) + e-i(theta)) 2. sin(theta) = (1/2i)(ei(theta) - e-i(theta)) 3. cos(A-B) = cos(A)cos(B) + sin(A)sin(B) 4. sin(A-B) = sin(A)cos(B) - cos(A)sin(B)

At rest, hydrogen has a spectral line at 124 nm. If this line is observed at 133 nm for the star Sirius, how fast is Sirius moving in km/s?

Hi! Can someone answer Activity 2, no. 2? Please include the complete solution, as well as the given and missing values. Thanks!

Can you please explain the math after (149709.34) 1/2 to get 386.92 how did you get that

I got 0.0104891861 Nm for my answer and don't see how that is incorrect.

The Sun and all Main Sequence stars derive their luminosity by fusing hydrogen to helium; in particular 4 1H ® 1 4He + Energy (photons) The mass of a proton is 1.0078 AMU, while the mass of a helium nucleus is 4.0026 AMU. a)     How much mass is ``lost'' (in AMU and kg) in fusing four H atoms to one helium?  This is called the mass defect.  b)     Mass isn't really lost, of course.  It is converted to energy via E=mc2. How much energy in joules (J) is liberated in a single reaction? c)     How many reactions per second are required to account for the entire luminosity of the Sun?

( plz explain in detail )

a)Define the term “standard candle” as used in cosmology.  b)The flux is defined asf(Dlum) = L/4πD^2lumwhere L is the absolute luminosity and Dlum is the distance to the radiation source (youmay assume z ≪ 1).Assume that we have measured the flux to be f = 7.234 10^−23 Wm^−2 and the absoluteluminosity is given by L = 3.828 x10^26W. Calculate the luminosity distance D lum to the objectin Mpc.