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9966 [12]
3 years ago
7

PLEASE HURRY TIMED TEST

Engineering
2 answers:
ladessa [460]3 years ago
5 0

Answer:

1

Explanation:

Vladimir [108]3 years ago
3 0
EXHAUST VALVE OPENS....... 1...... AAAAAAA
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The water behind Hoover Dam is 206m higher than the Colorado river below it. At what rate must water pass through the hydraulic
Leokris [45]

Answer:

m' = 4948.38 kg/s

Explanation:

For a case of 100% efficiency, the power produced must be equal to the rate of potential energy conversion

GIVEN THAT

Power = 100 MW

rate of Potential energy = (m')*g*h

100*10^6 = (m')*9.81*206

m' = 4948.38 kg/s

3 0
3 years ago
Read 2 more answers
In the elastic range of a tension test, an extensometer records an extension of 1.207 x 10-2 mm as the load increases by 5 kN. C
CaHeK987 [17]

Answer:

Value of Young's modulus is obtained as 2.07\times 10^{11}N/m^{2}

Explanation:

We know from the basic stress strain relationship

\sigma =E\times \epsilon

Stress is obtained as

\sigma =\frac{P}{A}=\frac{5\times 10^{3}}{\frac{\pi\times D^{2}}{4}}=\frac{5\times 10^{3}}{0.25\times \pi \times (7.98\times 10^{-3})^{2}}=99.97MPa

now the strain is obtained as

\epsilon =\frac{\Delta L}{L}=\frac{1.207\times 10^{-2}}{25}=4.828\times 10^{-4}

using these values in the above equation we obtain E as

E=\frac{\sigma }{\epsilon }=\frac{99.97\times 10^{6}}{4.828\times 10^{-4}}=2.07\times 10^{11}N/m^{2}

5 0
3 years ago
What is the weight of a glider with a mass of 4.9 grams?
timama [110]

Answer:

0.0481 N

Explanation:

The mass of a body is the quantity of matter stored in that body. It is a property that measures resistance to acceleration when a force is applied. The S.I unit of mass is the kilogram (kg).

The weight of a body is the force exerted on that body by gravity. The S.I unit of weight is the Newton (N). The weight of an object can also be defined as the force acting on the object. The formula for weight is:

Weight (W) = Mass (m) × acceleration due to gravity(g).

Giving that: mass (m) = 4.9 g = 0.0049 g and acceleration due to gravity (g) = 9.81 m/s².

Therefore, Weight (W) = 0.0049 × 9.81 = 0.0481 N

4 0
3 years ago
How does an electric circuit work?<br><br> Please give a detailed answer- thx
nydimaria [60]

Answer:

An electric current in a circuit transfers energy from the battery to the circuit components. No current is 'used up' in this process. In most circuits, the moving charged particles are negatively charged electrons that are always present in the wires and other components of the circuit.

3 0
3 years ago
Read 2 more answers
What is the highest possible theoretical efficiency of a heat engine operating with a hot reservoir of furnace gases at 727°C wh
hichkok12 [17]

Answer:

\eta_{max} = 70%

Explanation:

given data:

maximum temperature = 727 degree C =727 +273 = 1000 K

Minimum temperature = 27 degree C = 27 +273 = 300 K

Maximum efficiency is given as \eta

\eta = \frac{T_{max} - T_{min}}{T_{max}} *100%

plugging all value from the above to get maximum efficiency

\eta = \frac{1000-300}{1000} *100%

\eta_{max} = 70%

8 0
3 years ago
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