Homework Help for Engineering

how to evaluate arcsin(1)

Suppose 10 mg of L-deprenyl is diluted in 10 ml water (density 1.0g/ml) and the solution is to be used in the sugary solution approach. What is the mole fraction of the drug? What is the molarity of the drug (mol/L?

What is mortar in construction engineering?

<span;>The Only source of BOD in a river is untreated wastes that are being discharge from a food processing plant. The characteristics of untreated waste is not reported for the environmental protection agency of the town . To identify the waste water property from the processing plant the authority measured the DO of the river at 10km and 40km away from the plant and found 5mg/l and 2.5mg/l respectively. The average flow rate of the river is 0.25m/s and average depth is 4.5m with bed activity coefficient of 0.2.assume saturation DO 10mg/l

<span;>Parameter            river     waste water  

<span;>Flow,m3/s         0.7            0.23

<span;>BOD @ 18°C        2.5           N/A

<span;>DO, mg /l             8             N/A

<span;>Temperature       20            20

<span;>K @ 20°c             -                  0.23

<span;>a. What is the DO and BOD of the untreated waste form the processing plant? 

<span;>b. What is the critical DO and where downstream does it occur?

<span;>c. If the state requirement for minimum DO is 2mg/l is assimilative of the river restricted or not ?

1. Only source of BOD in a river is untreated wastes that are being discharge from a food processing plant. The characteristics of untreated waste is not reported for the environmental protection agency of the town . To identify the waste water property from the processing plant the authority measured the DO of the river at 10km and 40km away from the plant and found 5mg/l and 2.5mg/l respectively. The average flow rate of the river is 0.25m/s and average depth is 4.5m with bed activity coefficient of 0.2.assume saturation DO 10mg/l

Parameter            river     waste water  

Flow,m3/s         0.7            0.23

BOD @ 18°C        2.5           N/A

DO, mg /l             8             N/A

Temperature       20            20

K @ 20°c             -                  0.23

a. What is the DO and BOD of the untreated waste form the processing plant? 

b. What is the critical DO and where downstream does it occur?

c. If the state requirement for minimum DO is 2mg/l is assimilative of the river restricted or not ?

1. Only source of BOD in a river is untreated wastes that are being discharge from a food processing plant. The characteristics of untreated waste is not reported for the environmental protection agency of the town . To identify the waste water property from the processing plant the authority measured the DO of the river at 10km and 40km away from the plant and found 5mg/l and 2.5mg/l respectively. The average flow rate of the river is 0.25m/s and average depth is 4.5m with bed activity coefficient of 0.2.assume saturation DO 10mg/l

Exam

for water quality management in environmental engineering

what is the social impact of cars absorbing heat from the sun?

Provide references and cite sources that are primary literature, not websites

what is the social impact of cars absorbing heat from the sun

provide references and cite sources from the primary literature, not websites 

what is the social impact of cars absorbing heat from the sun  

Provide references and cite sources that are primary literature, not websites

global mining of uranium for making nuclear fuel is currently about 75000 metric tons questions

A dipole antenna dimensions has been designed to operate in 65MHz.

Will the same antenna work properly if frequencies a) 130MHz b) 195MHz are used?

Your answer should include the current distribution and impedance variation along the length of the antenna and how those are affected when frequencies of 130MHz and 195MHz are introduced. Also, include sketches of radiation patterns with respect to the changes in frequencies used.

Make sure you give descriptive answer. Use diagrams to help you with the answer.

A dipole antenna dimensions has been designed to operate in 65MHz.

Will the same antenna work properly if frequencies a) 130MHz b) 195MHz are used?

Your answer should include the current distribution and impedance variation along the length of the antenna and how those are affected when frequencies of 130MHz and 195MHz are introduced. Also, include sketches of radiation patterns with respect to the changes in frequencies used.

Make sure you give descriptive answer in order to achieve full marks. Use diagrams to help you with the answer.

3.1 Design an unregulated power supply that uses two silicon diodes, which will deliver 
an average current of 200mA to a dc motor having a resistance of 60 ohms. The 
applied voltage is 220V(RMS) at 50 Hz. NOTE:- Show all calculations and draw the 
circuit diagram. Give the appropriate minimum power ratings of the diodes and the 
motor used in the circuit. TAKE the voltdrop across any diode to be 0,7V. (16)

3.2 Calculate the RMS voltage and current rating of a fuse that is placed in the primary 
winding of the transformer, that would prevent the secondary circuit from drawing 
more than an average current of 250mA. (4)

3.3 An oscilloscope has the following settings:timebase = 2mS/div
amplitude = 5V/div
With reference to question 3.2, draw the voltage waveforms, on the graticules 
provided on figure 1 (to be handed in with your answer script), that would be 
measured by an oscilloscope when connected across: 
       3.3.1 the secondary winding of the transformer.
       3.3.2 the dc motor.
       3.3.3 one of the diodes

3.1 Design an unregulated power supply that uses two silicon diodes, which will deliver 
an average current of 200mA to a dc motor having a resistance of 60 ohms. The 
applied voltage is 220V(RMS) at 50 Hz. NOTE:- Show all calculations and draw the 
circuit diagram. Give the appropriate minimum power ratings of the diodes and the 
motor used in the circuit. TAKE the voltdrop across any diode to be 0,7V. (16)

3.2 Calculate the RMS voltage and current rating of a fuse that is placed in the primary 
winding of the transformer, that would prevent the secondary circuit from drawing 
more than an average current of 250mA. (4)

3.3 An oscilloscope has the following settings:timebase = 2mS/div
amplitude = 5V/div
With reference to question 3.2, draw the voltage waveforms, on the graticules 
provided on figure 1 (to be handed in with your answer script), that would be 
measured by an oscilloscope when connected across: 
      3.3.1 the secondary winding of the transformer.
      3.3.2 the dc motor.
      3.3.3 one of the diodes