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3 years ago

Which type of irrigation conserves more water than other types of irrigation?

1 answer:

6 0

Drip irrigation

Drip irrigation is one of the most efficient types of irrigation systems. The efficiency of applied and lost water as well as meeting the crop water need ranges from 80% to 90%

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The pressure in a water line is 1500 kPa. What is the line pressure in (a) lb/ft2units and (b) lbf/in2(psi) units?

n200080 [17]

Answer:

Part A:

$1500\ KPa= 31328.145 \frac{lb}{ft^2}$

Part B:

$1500 KPa=217.55656 \frac{lb}{in^2}$ (Psi)

Explanation:

Part A:

Line Pressure is 1500 KPa

We need a conversion factor which converts KPa to lb/ft^2.

$20.88543 \frac{lb}{ft^2}= 1\ KPa$

In order to convert 1500 KPa to lb/ft^2, we proceed as:

$1\ KPa=20.88543 \frac{lb}{ft^2} \\1500\ KPa= 1500 KPa*20.88543 \frac{lb}{ft^2.KPa}\\1500\ KPa= 31328.145 \frac{lb}{ft^2}$

1500 KPa is 31328.145 lb/ft^2

Part B:

We will use the same procedure we did in Part A:

1 ft= 12 in

$(1\ ft)^2=(12\ in)^2\\1 ft^2=144 in^2$

Converting $1500 KPa\ into\ \frac{lb}{in^2}$

$1500\ KPa= 1500 KPa*20.88543 \frac{lb}{ft^2.KPa} * \frac{ft^2}{144\ in^2}$

$1500 KPa=217.55656 \frac{lb}{in^2}$ (Psi)

1500 KPa is 217.55656 lb/in^2 (psi)

3 0

3 years ago

A household refrigerator that has a power input of 450 W and a COP of 1.5 is to cool five large watermelons, 10 kg each, to 8°C.

Andreyy89

Answer:

6222.22 sec

Explanation:

Given data the power input to the refrigerator is 450 W

The COP of refrigerator is 1.5

Temperature $T_1=8^{\circ}C$

$T_2=28^{\circ}C$

mass of watermelon =10 kg

specific heat =4.2 KJ/kg°C

The amount of heat removed from 5 watermelon

$Q=mc_pdt=5\times 10\times 4.2\times (28-8)=4200 KJ$

We know that $COP=\frac{Q_1}{W}$

$1.5=\frac{Q_1}{450}$

$Q_1=675$ W=0.675 KW

so time required to cool the watermelon is

$t=\frac{Q_1}{Q_2}=\frac{4200}{0.675}=6222.22 sec$

4 0

3 years ago

What are the relative volume requirements for a CM reactor compared to a PF reactor if first-order kinetics apply and treatment

Tanzania [10]

Answer:

look it up

Explanation:

6 0

3 years ago

The polycarbonate shell functions as all of the following except:

krok68 [10]

Answer:

what are the answers expect what?

Explanation:

Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.

6 0

3 years ago

What is the least common denominator for the fractions 16and34?

mihalych1998 [28]

Answer:

272

Explanation:

3 0

3 years ago

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