- #1
2odd
- 4
- 0
Can anyone give me the formula or equation so I can solve each of these?
Question #1
Suppose the Sun is located 7.4 kiloparsecs from the center of the Milky Way galaxy, and that it orbits the galaxy at a velocity of 240 km/sec. Estimate the mass of the galaxy interior to the Sun's orbit, converted to solar masses.
____solarmasses
Question #2
A new distant galaxy is discovered which shows a redshift corresponding to a recession velocity of 4429.0 kilometers/second. Using Hubble's Law, and a value of H = 72 km/s per Mpc, what is the distance to the new galaxy in megaparsecs?
____Mpc
Question #3
Find the invariant spacetime interval for a particle that travels sideways (in the x-direction only) a distance of 1000 kilometers in 0.1 seconds.
____meters
Question #4
What is the Schwartzschild radius of a typical stellar remnant black hole with a mass of 18.57 solar masses?
____meters
Question #5
What is the time required for a black hole with a mass of 5.13 x 1029 kilograms to evaporate by Hawking Radiation?
____years
Question #6
What is the temperature of a typical stellar remnant black hole with a mass of 16.32 solar masses?
____Kelvins
I don't know the formula to solve them.
I can't do any attempts yet because I don't have the formulas.
Homework Statement
Question #1
Suppose the Sun is located 7.4 kiloparsecs from the center of the Milky Way galaxy, and that it orbits the galaxy at a velocity of 240 km/sec. Estimate the mass of the galaxy interior to the Sun's orbit, converted to solar masses.
____solarmasses
Question #2
A new distant galaxy is discovered which shows a redshift corresponding to a recession velocity of 4429.0 kilometers/second. Using Hubble's Law, and a value of H = 72 km/s per Mpc, what is the distance to the new galaxy in megaparsecs?
____Mpc
Question #3
Find the invariant spacetime interval for a particle that travels sideways (in the x-direction only) a distance of 1000 kilometers in 0.1 seconds.
____meters
Question #4
What is the Schwartzschild radius of a typical stellar remnant black hole with a mass of 18.57 solar masses?
____meters
Question #5
What is the time required for a black hole with a mass of 5.13 x 1029 kilograms to evaporate by Hawking Radiation?
____years
Question #6
What is the temperature of a typical stellar remnant black hole with a mass of 16.32 solar masses?
____Kelvins
Homework Equations
I don't know the formula to solve them.
The Attempt at a Solution
I can't do any attempts yet because I don't have the formulas.