Answer:
0.63 s
Explanation:
We have,
- Height, h = 2.0 m
- Initial velocity, u = 0 m/s
- Acceleration due to gravity, g = 10 m/s²
We have to find the time taken.
⠀⠀⠀⠀⇒ h = ut + ½gt²
⠀⠀⠀⠀⇒ h = ½gt²
⠀⠀⠀⠀⇒ 2 = ½ × 10 × t²
⠀⠀⠀⠀⇒ 2 = 5 × t²
⠀⠀⠀⠀⇒ 2/5 = t²
⠀⠀⠀⠀⇒ √(2/5) = t
⠀⠀⠀⠀⇒ <u>0.63 s = t</u>
Therefore, time taken is 0.63 seconds.
The answer for the given statement above would be TRUE. It is true that in the 1920's, Hubble discovered that observed galaxies were heading away from the Earth in all directions. The galaxies<span> are </span>all<span> moving </span>away<span> from us at a rate proportional to their distance. Hope this answers your question.</span>
Answer:
option B is correct
factor is 0.0625
Explanation:
Given data
camera lens = 4X
to find out
find factor
solution
we know Inverse square law that is the intensity is inversely proportional to the square of the distance from the source i.e f
so we say intensity ( I ) ∝ 1 / f
so I1 / I2 = f2² / f1²
so I2 will be
I2 = f2² / f1² × I1
I2 = 1 / 4² × I1
I2 = 0.0625
so option B is correct
factor is 0.0625
Answer:
5.10 m/s
Explanation:
The volumetric flow rate for an incompressible fluid through a pipe is constant, so we can write:
(1)
where
is the cross-sectional area of the first part of the pipe
is the cross-sectional area of the second part of the pipe
is the speed of the fluid in the first part of the pipe
is the speed of the fluid in the second part of the pipe
Here we have:
is the radius in the first part of the pipe, so the area is
is the radius in the first part of the pipe, so the area is
Using eq.(1), we find the fluid speed at the second location:
