A) Total Resistance b) Total Current c) Current and Voltage through each resistor

The water in a large lake is to be used to generate electricity by the installation of a hydraulic turbine-generator at a locati

Lynna [10]

Answer:

a) 0.76

b) 0.80

c) 1964 kW

Explanation:

GIVEN DATA:

$\dot m = 5000 kg/s$

Assume Mechanical energy at exist is negligible

A) Take lake bottom as reference, and then kinetic and potential energy are taken as zero.

change in mechanical energy is givrn as

$e_{in} - e_{out} = \frac{P}{\rho} - 0 = gh = 9.81 \times 50( \frac{1 kJ/kg}{1000 m^2/s^2}$

= 0.491 kJ/kg

$\Delta \dot E_{mec} = \dot m (e_{in} - e_{out}) = 5000 \times 0.491 = 2455 kW$

$\eta_{OVERALL} = \frac{\dot W}{\Delta \dot E_{mec}} = \frac{1862}{2455} = 0.76$

B) $\eta -{gen} = \frac{\eta_{overall}}{\eta_{gen}} = \frac{0.76}{0.95} = 0.80$

c) $\dot W_{shaft} = \eta_{overall} \left | \Delta \dot E_{mec} \right | = 0.80(2455)$

$\dot W_{shaft} = 1964 kW$

7 0

4 years ago

The art of manipulating, influencing, or deceiving you into taking some action that isn’t in your best interest or in the best i

Mrac [35]

Social engineering is the answer

7 0

2 years ago

A defective crankshaft position sensor is a common cause of a no-start condition.

ohaa [14]

Answer:

Switching on and off

Explanation:

No starters are often caused by a faulty crankshaft actuator. The signals from this transmitter is sent to the ignition module, which turns in and out of the ignition system. If you already have an RPM sign, it's possible that a faulty ignition unit or PCM isn't turning the coils on and off. Along with button on and the motor cranking, testing for volts at the contacts with a voltmeter.

3 0

3 years ago

What does CPU stand for? computer processing unit central programming unit central processing unit computer programming unit

Harman [31]

Central processing unit

6 0

3 years ago

Read 2 more answers

Why Your first project as the new web designer at Smart Design is to increase web traffic to help boost web orders. Before you b

Tju [1.3M]

(D) It will let you know how the visitors are using the site and where there might be problem

Explanation:

Before re -designing a website the designer needs to answer the following question:

Is the design of the website outdated
Is there any decrease in the sales
Are their any complains regarding the users experience or design related issues

If the answers of the above mentioned question is yes then , a website redesign is important.

To find the answer of the above mentioned question the website designer need to know how the visitors are using the site and where there might be problem.

The answer for above question is (D)

8 0

3 years ago