Answer:
<em>The frequency of the wave = 10 Hz.</em>
Explanation:
Wave: A wave is a disturbance that travels through a medium a transfer energy from one point to another in the medium without causing and permanent displacement of the medium itself.
V = λf .................. Equation 1
making f the subject of the equation,
f = V/λ.................... Equation 2
Where V = velocity of the wave, λ = wavelength of the wave, f = frequency of the wave.
<em>Given: V = 15 m/s², λ = 4.5 m.</em>
<em>Substituting these values into equation 2,</em>
<em>f = 15/1.5</em>
<em>f = 10 Hz.</em>
<em>Therefore the frequency of the wave = 10 Hz.</em>
Answer:
3750 N
Explanation:
Pressure on the small cylinder = pressure on the large cylinder
P₁ = P₂
F₁ / A₁ = F₂ / A₂
F₁ / (π d₁² / 4) = F₂ / (π d₂² / 4)
F₁ / d₁² = F₂ / d₂²
600 N / (10.0 cm)² = F / (25.0 cm)²
F = 3750 N
Answer:
A. 0.20 unpolarized and 0.80 plane polarized.
Explanation:
After passing through polaroid sheet , unpolarised portion will get reduced by half . So this portion becomes .20/ 2 = 0.10
The polarized portion can face two situation depending upon the angle of the polaroid.
It may either be cut off to zero. So total intensity of transmitted light wil be .10 + 0 = .10
It may or be passed fully . In that case total intensity of transmitted light will become 0 .10 +0.80 =0.90
Ratio of these two light of maximum and minimum intensity is 0.90 / 0.10 = 9.
Answer:
The power to maintain constant temperature is 18.56kW
Explanation:
Given
Required
Determine the power to maintain constant temperature
The power to maintain a constant temperature is the difference between heat loss and gain
i.e.
This gives:
Convert Btu/h to kW
So:
<em>Hence;</em>
<em>The power to maintain constant temperature is 18.56kW</em>
Answer:
a), b), d), and e) are correct.
Explanation:
c) is incorrect because an object that has a definite shape cannot be in a gaseous state as gaseous objects take the shape of their container.
a) is correct because objects that are liquid have definite volumes but no definite shapes as they take the shape of their containers,
b) is correct as this is the definition of an object which is in a solid state.
d) is correct as this is the definition of an object which is in a gaseous state.
e) is correct as rigidness, the quality of having a definite shape is only exhibited by objects that are in solid state.