Approximately how long does it take light to travel across the diameter of the Milky Way?

A) 27,000 years
B) 100,000 years
C) 200,000 years
D) 1 million years


B

Physics & Space Science

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What is the Prandtl number?

What will be an ideal response?

Physics & Space Science

All of the statements below are true. Which one gives the primary reason why the surface of Venus today is some 450°C hotter than the surface of Earth?

A) Venus is only about 73 percent as far from the Sun as Earth. B) Venus has a much stronger greenhouse effect than Earth. C) Venus has a much higher reflectivity than Earth. D) Venus has a higher atmospheric pressure than Earth.

Physics & Space Science

The helium flash stage lasts several thousand years

Indicate whether the statement is true or false

Physics & Space Science

Expressed in standard powers-of-10 notation and rounded to four significant figures, the number 0.00023648 is

a. 2.364 × 10^3. b. 2.365 × 10^4. c. 2.365 × 10^-4. d. 236.4 × 10^-6.

Physics & Space Science