Orion is visible on winter evenings in the northern hemisphere but not summer evenings because of

a) interference from the full Moon
b)the location of Earth in its orbit
c)the tilt of Earths axis


b)the location of Earth in its orbit

Physics & Space Science

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Nonmetals produce negatively charged ions,

which are referred to as a) lone pairs. b) cations. c) polar ions. d) anions.

Physics & Space Science

Approximately how fast is a person located at the Earth's equator moving around Earth's axis due to the rotation of the Earth?

A) 17,000 km/hr B) 1700 km/hr C) 170 km/hr D) 17 km/hr E) not moving at all

Physics & Space Science

Electromagnetism unites

A) electricity and magnetism. B) electric and gravitational fields. C) physics and biophysics. D) all of the above E) none of the above

Physics & Space Science

George Gamow, the creator of the Big-Bang theory of the origin of the universe, asks you to imagine what would happen if the speed of light was 15. mi/h

If you were on the sidewalk looking at a bicyclist ride down the street, how does she look to you while riding, compared to when she stops? A) taller, the same mass, but stretched out like a limousine B) shorter, the same mass, but stretched out like a limousine C) same height, greater mass, and flatter in the direction she is moving D) same height, smaller mass, and flatter in the direction she is moving E) shorter, greater mass, but stretched out like a limousine

Physics & Space Science