Answer:
Velocity in the smaller pipe should not be included as an additional variable.
Explanation:
The dimensional formula of the variables are
Now using Buchingham's Pi Theorem, 6 - 3 = 3 dimensional parameters are required.
Use, D_1, V, \mu as the repeating variables.
Therefore,
From this
1+c=0
-2+a+b-2c=0
-b+c=0
c=-1, b = -1, a = 1
Now,
For
c = 0
1 + a + b - 2c = 0
-b + c = 0
Therefore, a = -1, b = 0, c = 0
For
1 + c = 0
-4 + a + b - 2c = 0
2-b+c=0
c=-1, b=1, a = 1
Therefore,
Now checking,
Therefore,
From continuity equation
is not independent of
Therefore it should not be included as an additional variable.
Given info is
<span>Distance= 100m and Time=10s </span>
<span>Velocity=100/10=10m/s </span>
<span>Kinetic energy= 1/2mv^2 </span>
<span>Rough estimate of mass of athlete=80kg </span>
<span>Ek= 1/2x80x10^2= 4000J </span>
The correct answer to this open question is the following.
Unfortunately, you forgot to include the options for this question.
However, trying to help you we can comment based on our knowledge of this topic.
The sun appears to be brighter than this runaway star when viewed from Earth because "the sun is closer to Earth than the runaway star."
Indeed, with great modern technology such as the Hubble Space Telescope, scientists recently discovered a giant runaway star. It is 90 times larger than the sun and is very hot and blue-white in color.
Edwin Hubble, in 1929, discovered that distant galaxies increased in the function of their distance. That is why he concluded that the Universe is in constant expansion.
Today, with the use of the modern Hubble telescope, many scientists consider that our Universe is in continual change since the very moment of its creation.
The answer is C. the earths mantle because the wood in this case is the surface
<h3>
Answer:</h3>
2000 N/m²
<h3>
Explanation:</h3>
From the question;
- Force exerted by the box is 3000 Newtons
- Area of the box in contact with the ground is 1.5 m²
We are required to calculate the pressure;
- Pressure refers to the force per unit area.
That is;
Pressure = Force/Area
Thus, in this case;
Pressure = 3000 N ÷ 1.5 m²
= 2000 N/m²
Therefore, the pressure exerted by the box on the ground is 2000 N/m²