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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

A resting blood pressure of 140 over 90 or more is considered hypertension.

Answer the following statement(s) true (T) or false (F)

Physics & Space Science

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).

Physics & Space Science