What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of
1 answer:
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Answer:
(a) a = 2.44 m/s²
(b) s = 63.24 m
Explanation:
(a)
We will use the second equation of motion here:
where,
s = distance covered = 47 m
vi = initial speed = 0 m/s
t = time taken = 6.2 s
a = acceleration = ?
Therefore,
<u>a = 2.44 m/s²</u>
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(b)
Now, we will again use the second equation of motion for the complete length of the inclined plane:
where,
s = distance covered = ?
vi = initial speed = 0 m/s
t = time taken = 7.2 s
a = acceleration = 2.44 m/s²
Therefore,
<u>s = 63.24 m</u>
Answer:
Explanation:
The frequency of a sodium vapor lamp,
We need to find the wavelength of light. The relation between wavelength, frequency and speed of light is given by :
So, the wavelength of light is equal to .