The luminosity of Sirius is 22.5 times bigger than the Sun's luminosity. a) (7%) Calculate the ratio of the masses of Sirius and the Sun using the mass-luminosity relation applicable to main sequence stars L~M3.5%3; b) (9%) Compare the life expectancy of Sirius with the solar life time, which is TSun= 1010years. Use the formula t= M/L.

Q: The block of mass 10.0-kg is at rest initially and attached to a spring, and the spring constant is…

A:

Q: Q4:-Find the kinetic energy of a proton whose de Broglie wavelength is 1.00fm= 1.00x10-15 m. [rest…

A:

Q: A projectile is fired with an initial velocity of 400 m/s hits a cliff 2000 meter apart determine…

A: range = V0 cos(60) x t  here V0 = 400m/s time of flight is t seconds range = 2000m thus, time (t) =…

Q: A car is approaching at a traffic light at a speed of 15 m per second When the light turns red, the…

A:

Q: Determine the coefficient of linear expansion if the length of metal change from 10- 10.02 m and the…

A: 1. Given Length of metal change = 10 - 10.02 m Temperature                   = 30 - 80 K

Q: Consider a semiconductor bar with w 0.1 mm, d 10 µm and L-5 mm. for B-104 Wb/cm², and a current of 1…

A:

Q: Q2/(1) If a-i+2j- 3k and 5 4i+7k, then 2d+35 in zerms of i, j, and k is Ji + 2j +4k. 3M (a) True,…

A: Given  Vector a = i + 2 j - 3k Vector b = 4i + 7 k We have to find vector  2a + 3b in terms of i, j…