Neutron stars are 100,000 times denser than white dwarfs

Indicate whether the statement is true or false


FALSE

Physics & Space Science

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The Greeks rejected the notion that the Earth orbits the Sun. Why?

A) They could not measure how big the Earth was. B) They weren't as smart as we are. C) They could not measure a change in stars' positions on the sky. D) They believed that the Sun is a God.

Physics & Space Science

A 10-kg block is pushed across a horizontal surface with a horizontal force of 30 N against a friction force of 10 N. The acceleration of the block is

A) 1 m/s2. B) 2 m/s2. C) 5 m/s2. D) 10 m/s2. E) none of the above

Physics & Space Science

A spaceship from another galaxy passes over the solar system directly above a radial line from the Sun to the Earth. (We measure that distance to be 1.5 × 10^11 m.) On Earth, the spaceship is observed to be traveling at a speed of 0.80c, for which ? = 5/3 . As measured on Earth it takes the spaceship 625 seconds to travel from the Sun to Earth. When a scientist in the spaceship measures the

Earth-Sun distance and the time it takes her to travel that distance, she finds the results are, respectively a. 9.0 × 10^10 m; 375 s. b. 9.0 × 10^10 m; 625 s. c. 1.5 × 10^11 m; 625 s. d. 2.5 × 10^11 m; 625 s. e. 2.5 × 10^11 m; 1042 s.

Physics & Space Science

To the nearest percent, what fraction of an iceberg is submerged? (?ice = 917 kg/m3, ?sea = 1.03 × 10^3 kg/m3.)

a. 95% b. 93% c. 91% d. 89% e. 77%

Physics & Space Science