7. A student wanted to see if the color of water impacted the increase in temperature, in degrees Celsius (°C), after 30 minutes in the Sun. Three beakers were filled with 50 milliliters (ml) of water,
and five drops of food coloring were added to each beaker. The beakers were then placed on a
window ledge in direct sunlight and temperature readings were
recorded every 10 minutes for 30
minutes
Red
Blue
Clear
0 min
22 °C
22 °C
TEMPERATURE OF WATER
10 min
20 min
25 °C
31 °C
25 °C
30 °C
25 °C
31 °C
30 min
32 °C
33 °C
33 °C
22 °C
What was the test (independent) variable in this experiment?
A. the color of the water
B. the temperature of the water
C. the amount of water in each beaker
D. the amount of time each beaker was exposed to sunlight

c8h10 is your answerr

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).

explanation:

0.07 g/cm³

1.37 g/cm³