Hoiu-10,4000 mm.
<h3>
Is positive pressure good for PC?</h3>
- A balanced configuration is the most efficient way to cool your pc although it should tend towards a slight positive pressure if you can help it.
- Tip: As much as it might seem important, the concept of heat rising doesn't have too much of an effect.
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Answer:
The force induced on the aircraft is 2.60 N
Solution:
As per the question:
Power transmitted, ![P_{t} = 8 kW = 8000 W](https://tex.z-dn.net/?f=P_%7Bt%7D%20%3D%208%20kW%20%3D%208000%20W)
Now, the force, F is given by:
(1)
where
v = velocity
Now,
For a geo-stationary satellite, the centripetal force,
is provided by the gravitational force,
:
![F_{c} = F_{G}](https://tex.z-dn.net/?f=F_%7Bc%7D%20%3D%20F_%7BG%7D)
![\frac{mv^{2}}{R} = \frac{GM_{e}m{R^{2}}](https://tex.z-dn.net/?f=%5Cfrac%7Bmv%5E%7B2%7D%7D%7BR%7D%20%3D%20%5Cfrac%7BGM_%7Be%7Dm%7BR%5E%7B2%7D%7D)
Thus from the above, velocity comes out to be:
![v = \sqrt{\frac{GM_{e}}{R}}](https://tex.z-dn.net/?f=v%20%3D%20%5Csqrt%7B%5Cfrac%7BGM_%7Be%7D%7D%7BR%7D%7D)
![v = \sqrt{\frac{6.67\times 10^{- 11}\times 5.979\times 10^{24}}{42166\times 10^{3}}} = 3075.36 m/ s](https://tex.z-dn.net/?f=v%20%3D%20%5Csqrt%7B%5Cfrac%7B6.67%5Ctimes%2010%5E%7B-%2011%7D%5Ctimes%205.979%5Ctimes%2010%5E%7B24%7D%7D%7B42166%5Ctimes%2010%5E%7B3%7D%7D%7D%20%3D%203075.36%20m%2F%20s)
where
R = ![R_{e} + H](https://tex.z-dn.net/?f=R_%7Be%7D%20%2B%20H)
R = ![\sqrt{GM_{e}(\frac{T}{2\pi})^{2}}](https://tex.z-dn.net/?f=%5Csqrt%7BGM_%7Be%7D%28%5Cfrac%7BT%7D%7B2%5Cpi%7D%29%5E%7B2%7D%7D)
where
G = Gravitational constant
T = Time period of rotation of Earth
R is calculated as 42166 km
Now, from eqn (1):
![8000 = F\times 3075.36](https://tex.z-dn.net/?f=8000%20%3D%20F%5Ctimes%203075.36)
F = 2.60 N
Answer:
the maximum length of specimen before deformation is found to be 235.6 mm
Explanation:
First, we need to find the stress on the cylinder.
Stress = σ = P/A
where,
P = Load = 2000 N
A = Cross-sectional area = πd²/4 = π(0.0037 m)²/4
A = 1.0752 x 10^-5 m²
σ = 2000 N/1.0752 x 10^-5 m²
σ = 186 MPa
Now, we find the strain (∈):
Elastic Modulus = Stress / Strain
E = σ / ∈
∈ = σ / E
∈ = 186 x 10^6 Pa/107 x 10^9 Pa
∈ = 1.74 x 10^-3 mm/mm
Now, we find the original length.
∈ = Elongation/Original Length
Original Length = Elongation/∈
Original Length = 0.41 mm/1.74 x 10^-3
<u>Original Length = 235.6 mm</u>
Explanation:
Ohm's law is used here. V = IR, and variations. The voltage across all elements is the same in this parallel circuit. (V1 =V2 =V3)
The total supply current is the sum of the currents in each of the branches. (It = I1 +I2 +I3)
Rt = (8 V)/(8 A) = 1 Ω . . . . supply voltage divided by supply current
I3 = 8A -3A -4A = 1 A . . . . supply current not flowing through other branches
R1 = (8 V)/(3 A) = 8/3 Ω
R2 = (8 V)/(4 A) = 2 Ω
R3 = (8 V)/(I3) = (8 V)/(1 A) = 8 Ω
V1 = V2 = V3 = 8 V