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2 years ago

Ropes made from _________ are typically very weak.

Engineering

2 answers:

amm18122 years ago

7 0

Answer:

Sisal

Explanation:

Sisal is another natural fiber that comes from plants. It is a very weak fiber that has less strength than cotton.

olga_2 [115]2 years ago

6 0

Answer:

Sisal, cotton, jute and manila

Explanation:

Because of the natural fibers, the rope is soft and pliable but this results in very low strength and makes the rope susceptible to damage by abrasion (the natural composition is not adapted to being altered). Most ropes are made with plastic-based materials (ex. nylon, polypropylene) for durability.

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What truck you like the best

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Answer:

The 3rd one!!!!

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3 years ago

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A 20 dBm power source is connected to the input of a directional coupler having a coupling factor of 20 dB, a directivity of 35

lukranit [14]

Answer:

$P_O = 0.989 watt = 19.9 dBm$

Explanation:

Given data:

P_1 power = 20 dBm = 0.1 watt

coupling factor is 20dB

Directivity = 35 dB

We know that

coupling factor $= 10 log \frac{P_1}{P_f}$

solving for final power

$20 = 10 log\frac{P_1}{P_f}$

$2 = log \frac{P_1}{P_f}$

$100 = \frac{0.1}{P_f}$

$P_f = 0.001 watt = 0 dBm$

Directivity $D = 10 \frac{P_f}{P_b}$

$35 = 10 \frac{0.001}{P_b}$

$P_b = 3.162 \times 10^{-7} wattt$

output Power $= P_1 -P_f - P_b$

$= 0.1 - 0.001 - 3.162 \times 10^{-7}$

$P_O = 0.989 watt = 19.9 dBm$

6 0

4 years ago

A flow of 2.6 MGD leaves a primary clarifier with a BOD of 131 mg/L. Determine the aeration period (hydraulic detention time) of

SashulF [63]

Answer:

8.5 days

Explanation:

Given data :

Flow ( Q ) = 2.6 MGD = 11819.834 m^3/day

BOD = 131 mg/L

BOD loading rate = 35 Ibs/1000 ft^3 per day = 0.5606 kg/m^3/day

<u>Calculate the sludge age of the facility </u>

Given the BOD applied to the aeration tank = 11819.834 m^3/day * 131mg/l

= 1548.398 kg/day

first calculate the volume of the aeration tank

V = BOD applied / BOD loading rate

V = 1548.398 / 0.5606 = 2762.03 m^3

Hydraulic Detention time = V / Q

= 2762.03 / 11819.834 = 0.2336 day = 5.6 hour

next : determine the mass rate of the waste

= 44% * 0.5606 kg/m^3/day

= 0.2466 kg/m^2/day

finally determine the sludge age

= V * Xt / ∅w * R

= ( 2762.03 m^3 * 2100 * 10^-3 ) / ( 0.2466 * 2762.03 kg/day )

= 8.5 days

8 0

3 years ago

Convert 25 inches / min to mm/hour

Taya2010 [7]

Answer:

25 mins into hours = 0.416667 hours

25 inches as mm = 635

Explanation:

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4 years ago

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trasher [3.6K]

Answer:

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4 years ago