What is the period of revolution of a planet in circular orbit around a star of 4.0 solar masses if it is at a distance from the star equal to that of the Earth from the Sun?
0.50 year
You might also like to view...
All the following statements are true. Which one follows directly from Kepler's third law?
A) Venus is more massive than Mercury. B) Venus orbits the Sun at a slower average speed than Mercury. C) Venus is larger than Mercury. D) Venus has a thicker atmosphere than Mercury.
How are rotation curves of spiral galaxies determined for distances beyond where starlight can be detected?
A) by measuring the broadening of the galaxy's absorption lines B) by extrapolation of the measured rotation curve C) by observations of spectral lines emitted by dark matter D) by watching the galaxies rotate over a period of decades E) by observations of the 21 cm line of atomic hydrogen
An electron has a speed of 0.783c. Through what potential difference would the electron need to be accelerated from rest in order to reach this speed? The rest mass energy of an electron is 0.511 MeV
A) 310 kV B) 260 kV C) 360 kV D) 400 kV
Which of the following statements is incorrect?
What will be an ideal response?