How fast is a galaxy at a distance of 3000 Mpc receding from us?
A: 216,000 km/s
B: 3000 km/s
C: 2400 km/s
D: 24 km/s
E: 24,000 km/s
Ans: A: 216,000 km/s
You might also like to view...
What is the size of an object located at a distance of 1,000 meters and that has angular size A = 4 degrees?
A. about 4,000 meters B. about 11 meters C. about 35 meters D. about 70 meters
The WAI guidelines that you should use should use HTML to specify fonts.
Answer the following statement true (T) or false (F)
For binary star systems where the stars are separated by more than 1000 stellar radii, mass transfer is not an issue
Indicate whether the statement is true or false
An iron bolt is galvanized with a coating of zinc 0.03 cm (0.012 in) thick to protect the iron in a saltwater environment. The bolt has an area of 2 cm2 and is used to secure an iron plate with an area of 100 cm2 that is exposed to saltwater. In an experiment in seawater with a zinc coated iron anode of 2 cm2 and an iron plate cathode with an area of 100 cm2 a corrosion current of 2 mA is measured. Predict the expected lifetime in years or days of the zinc coating in this application assuming that the zinc coating is uniformly corroded and that the current efficiency is 100 %.
What will be an ideal response?