Two planets have the same surface gravity, but planet B has twice the mass of planet A. If planet A has radius r, what is the radius of planet B?
A) r B) r C) 2r D) 4r E) r/
A
You might also like to view...
A resting blood pressure of 140 over 90 or more is considered hypertension.
Answer the following statement(s) true (T) or false (F)
Compton Scattering: X-rays with a wavelength of 0.00100 nm are scattered by free electrons at 130° from their original direction. What is the kinetic energy (in keV) of each recoil electron? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
Fill in the blank(s) with the appropriate word(s).
Refracting Telescope: The length of a telescope is 1.60 m and it has a magnification of 60.0. What is the focal length of the eyepiece?
A. 2.62 cm B. 60.0 cm C. 100 cm D. 1.16 cm E. 96.0 cm
The rms speed of the molecules of a gas is 200 m/s at a temperature 300 K. What is the mass of the individual molecules?
A) 2.13 × 10-25 kg B) 2.45 × 10-25 kg C) 5.66 × 10-25 kg D) 1.78 × 10-25 kg E) 3.11 × 10-25 kg