The meridian at 0 degrees is:

What will be an ideal response?


the prime meridian

Physics & Space Science

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Which of the following best describes the origin of ocean tides on Earth?

A) Tides are caused by the difference in the force of gravity exerted by the Moon across the sphere of the Earth. B) The Moon's gravity pulls harder on water than on land because water is less dense than rock. C) Tides are caused by the 23.5-degree tilt of the Earth's rotational axis to the ecliptic plane. D) Tides are caused on the side of the Earth nearest the Moon because the Moon's gravity attracts the water.

Physics & Space Science

Collisions between galaxies have little effect on the individual stars

Indicate whether the statement is true or false

Physics & Space Science

Suppose you electrically charge a comb by running it through your hair. If you then shake this comb back and forth one time every second, you will create

A) an electromagnetic wave having a frequency of 1 Hz and a speed of 300,000 km/s. B) a sound wave having a frequency of 1 Hz and a speed of 300,000 km/s. C) an electromagnetic field that vibrates at a frequency of 1 Hz, but no electromagnetic wave is created. D) the tooth fairy. E) a sound wave having a wavelength of 300,000 km and a speed of 300,000 km/s.

Physics & Space Science

Which of the following compounds would you expect to be soluble in water?

a. PbCO3 b. Ag2CO3 c. CuCO3 d. K2CO3

Physics & Space Science