A nearby galaxy has a radius of 4,000 million A.U. and rotates once every 800 million years. What is its mass in solar masses?
What will be an ideal response?
Using Kepler's third law, P2 = a3/(M + m), and using solar system units of years, AUs, and solar masses, the sum of the masses must be M + m = 1011 solar masses. The sum of the masses, in this case represents the total mass of the galaxy.
You might also like to view...
The Coriolis effect is very important to the weather of Venus
Indicate whether the statement is true or false
An air track cart with mass m and speed v moving along an air track collides with a stationary cart with a mass m/3. After the collision the first cart has a speed v/2. What is the speed of the second cart?
What will be an ideal response?
Two slits separated by 0.10 mm are illuminated with green light (? = 540 nm). Calculate the distance (in cm) from the central bright-region to the fifth bright band if the screen is 1.0 m away.
A. 2.3 B. 2.5 C. 2.7 D. 2.1 E. 2.0
The speed of sound in air is a function of which one of the following?
a. wavelength c. temperature b. frequency d. amplitude