Answer : The pressure difference required is,
Explanation : Given,
Length of tube = 2.0 m
Diameter of tube = 1.0 mm = 1.0 × 10⁻³
Average speed of water = 4.0 m/s
Viscosity of water at 40°C = 0.7 × 10⁻³
The expression used for pressure difference is:
where,
= pressure difference
= viscosity of water = 0.7 × 10⁻³
L = length of tube = 2.0 m
A = area of tube =
= average speed of water = 4.0 m/s
Now put all the given values in the above expression, we get:
Thus, the pressure difference required is,
Answer:
Atoms
Explanation:
Atoms make up literally everything in teh universe including molecules and compounds
Explanation:
Force is defined as mass times acceleration.
Mathematically, F = m × a
where F = force
m = mass
a = acceleration
This shows that force is directly proportional to acceleration. So, when greater force is applied then acceleration will also increase.
Whereas acceleration is inversely proportional to mass. So, when there is increase in mass then there will be decrease in acceleration.
Answer:
I = 6.4*10¹⁷ W/m²
Explanation:
As the intensity of a light source is defined as the light power divided by the illuminated area, we need first to find the power emitted by the laser during the pulse.
As power is defined as energy per unit time, we can find the power P as follows:
⇒ P = 5*10⁷ W
As the laser is a narrow-beam source, we can find the intensity dividing the power we have just found above, by the area of the circle over which the light is focused:
⇒ I = 6.4*10¹⁷ W/m²
Answer:
vf = 6.724 m/s
Explanation:
Velocity: This an be defined as the rate of change of displacement. Velocity is a vector quantity, because it can be represented both in magnitude and direction. The S.I unit of velocity is m/s.
From newton's equation of motion,
vf = vi + at ......................................... Equation 1
Where vf = final velocity, vi = initial velocity, a = acceleration, t = time.
Given: vi = 3.6 m/s, a = 0.71 m/s², t = 4.4 s.
Substitute into equation 1
vf = 3.6+0.71(4.4)
vf = 3.6+3.124
vf = 6.724 m/s
Hence, vf = 6.724 m/s