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Alenkasestr [34]
3 years ago
6

Whatever they said bbbbbbbbbbbbbbbbbb

Engineering
2 answers:
solong [7]3 years ago
7 0

Answer:

yh and I said aaaaaaaaaaaa

Explanation:

zheka24 [161]3 years ago
3 0
I said i love youuuuuu
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The viscosity of a fluid is 10 be measured by a viscometer constructed of two 75-cm-long concentric cylinders. The outer diamete
a_sh-v [17]

Answer:

0.023 Pa*s

Explanation:

The surface area of the side of the inner cylinder is:

A = π*d*l

A = π*0.15*0.75 = 0.35 m^2

At 200 rpm the inner cylinder has a tangential speed of:

u = w * r

u = w * d/2

w = 200 rpm * 2π / 60 = 20.9 rad/s

u = 20.9 * 0.15 / 2 = 1.57 m/s

The torque is of 0.8 N*m, this means that the force is:

T = F * r

F = T / r

F = 2*T / d

For Newtoninan fluids with two plates moving respect of each other with a  fluid between the viscous friction force would be:

F = μ*A*u / y

Where

μ: viscocity

y: separation between pates

A: surface area of the plates

Then:

2*T / d = μ*A*u/y

Rearranging:

μ = 2*T*y / (d*A*u)

μ = 2*0.8*0.0012 / (0.15*0.35*1.57) = 0.023 Pa*s

5 0
3 years ago
Kerosene flows through 3/4 standard type K drawn copper tube. The pressure drop measured at two points 50 m apart is 130 kPa. De
Anettt [7]

Answer:

Q=4.98\times 10^{-3}\ m^3/s

Explanation:

Given that

L= 50 m

Pressure drop = 130 KPa

For Copper tube is 3/4 standard type K drawn tube

Outside diameter=22.22 mm

Inside diameter=18.92 mm

Dynamic viscosity for kerosene

\mu =0.00164\ Pa.s

Pressure difference given as

\Delta P=\dfrac{128\mu QL}{\pi d_i^4}

Where

L is length of tube

μ is dynamic viscosity

Q is volume flow rate

d is inner diameter of tube

ΔP is pressure drop

Now by putting the values

\Delta P=\dfrac{128\mu QL}{\pi d_i^4}

130\times 1000=\dfrac{128\times 0.00164\times 50\times Q}{\pi\times 0.0189^4}

Q=4.98\times 10^{-3}\ m^3/s

So flow rate is Q=4.98\times 10^{-3}\ m^3/s

7 0
3 years ago
A steam turbine has isentropic efficiency of 0.8. Isentropically, it is supposed to deliver work of 100 kW. What is the actual w
trapecia [35]

Answer:

80 kW; 11 kW; 8 kW; 0.6

Explanation:

Part 1

Isentropic turbine efficiency:  

\eta_t = \frac{\text{Real turbine work}}{\text{isentropic turbine work}} = \frac{W_{real}}{W_s}

W_{real} = \eta_t*W_s

W_{real} = 0.8*100 kW

W_{real} = 80 kW

Part 2

Coefficient of performance COP is defined by:

COP = \frac{Q_{out}}{W}

Q_{out} = W*COP

Q_{out} = 5 kW*2.2

Q_{out} = 11 kW

Part 3

(a)

Energy balance for a refrigeration cycle gives:

Q_{in} + W = Q_{out}

3 kW + 5 kW = Q_{out}

8 kW = Q_{out}

(b)

COP = \frac{Q_{in}}{W}

COP = \frac{3 kW}{5 kW}

COP = 0.6

3 0
3 years ago
Which of the following is NOT a risky food:
Lyrx [107]

i think it's c. bread.

3 0
3 years ago
Read 2 more answers
2
aksik [14]

Answer:tech A

Explanation:

5 0
3 years ago
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