Astronomy | Astrophysics Answers

three particles of mass 10 g are placed at the vertices of an equilateral triangle of side 30 cm.find distance of its centre of mass from any of its vertex and moment of inertia of the system of particles about an axis passing through the centre of mass of the system and perpendicular to the plane containing them

As the earth rotates and spins..why don't we observe its motion?

How long will a 5MΘ star burn hydrogen as fuel, given that the Sun will do so for about 10^10
years?

The change in the value of acceleration of earth towards sun, when the moon comes from the position of solar eclipse to the position on the other side of earth in line with the sun is? (mass of moon = 7.36 × 〖10〗^22 kg, orbital radius of moon = 3.8 ×〖10〗^8 m)

the wavelength of a light wave having a frequency of 80,000,000 hz is

If the singularity at the time of the Big Bang were of infinite density,
a) would time stand still?
b)would the absolute duration of a second then be much greater than it is now?

Thank you

Newton's derived his law of universal gravitation by considering moon and earth , so why we use his law everywhere ?

a sphere of mass 40 kg is attracted by another sphere of mass 15 kg wit a force of 1/10 mg wt. find the value of gravity if centers of spheres are 20 cm apart

What is the formula to create a black hole?

What is the magnitude of the angular momentum associated (a) with Earth’s rotation about its own axis and (b) with its revolution about the Sun? See Appendix E, and consider Earth to be a uniform sphere.