Astronomy | Astrophysics Answers

what is the velocity at the center of earth

Can an object be placed in space and remain perfectly still outside gravity fields, and despite dark matter, and galactic drift?

consider a mass of m1 and m2. m2 larger than m1. note that gravity acts on both masses. determine the net force acting on the system.
what is the total mass of the system?
with the info you just computed fine the accerleration of the system.

Assuming that Earth has a circular orbit with a radius of 1.496 x 10^11 m, what is
a) the average speed (in m/s) o fEarth for one full orbit?
b) the average velocity of Earth for one full orbit?

Which of the following determines the frequency at which a star emits most of its radiation?
A) Its distance from us
B) Its temperature
C) It brightness

How would the seasons change if the Earth had no axial tilt?

The speed of a satellite in orbit 265 km above the surface and
The period of the satellite

Why the Earth is round?

Why does time run slow near a massive body like a black hole?

What is the kinetic energy of a 300g mass moving at 150,000 km/s?