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slega [8]
2 years ago
7

Give 4 facts about the alkali metals

Physics
2 answers:
miss Akunina [59]2 years ago
8 0

Answer:

there very old

Explanation:

Korvikt [17]2 years ago
7 0

<u>Facts</u><u> </u><u>about</u><u> </u><u>alkali</u><u> </u><u>metals</u><u> </u><u>are</u><u>~</u>

  • Because they are so reactive with air and water, they are generally stored in oil.
  • Cesium clocks are considered the most accurate of all clocks.
  • highly reactive at standard temperature and pressure.
  • Sodium and potassium both play an important role in biological life on Earth.
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(Assume there is no friction) A bike starts rolling down a hill at 4.3 m/s . After 12 s it reaches the bottom moving at 11.5 m/s
mote1985 [20]

Answer:

94.8 m

Explanation:

The motion of the bike is a uniformly accelerated motion (=constant acceleration), so we can use the following suvat equation:

s=(\frac{u+v}{2})t

where:

s is the distance covered

u is the initial velocity

v is the final velocity

t is the time elapsed

For the bike in this problem, we have:

u = 4.3 m/s is the initial velocity

v = 11.5 m/s is the final velocity

t = 12 s is the time

Solving for s, we find the length of the hill:

s=(\frac{4.3+11.5}{2})(12)=94.8 m

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3 years ago
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Answer:

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Explanation:

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4 years ago
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