Plz me im begging you
cosmic background radiation indicates what?

the universe is expanding.

the universe is contracting.

the universe is at rest.

the universe will explode.

question 3

if the universe were contracting, what would happen to light from other galaxies as it reached earth?

it would be brighter.

it would be dimmer.

it would be blue shifted.

it would be red shifted

how do scientists determine motion of objects in the universe?

big bang theory

doppler effect

heliocentric theory

geocentric theory

question 5

what does a blue shift in light from stars indicate?

the stars are moving closer.

the stars are moving farther away.

the stars are stationary.

the stars are moving randomly.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).