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docker41 [41]
3 years ago
13

An isothermal CSTR with a first order irreversible reaction A â> B (and rA[mol/(ft3*min)] = - 0.5 CA) has a constant flow rat

e of 29.0 ft^3/min. The reactor volume is 100 ft3. If the inlet concentration CAi is 7.3 moles/ft^3 at t = 0 and the initial outlet concentration CA is 2.3 moles/ft^3.
Required:
Determine the outlet concentration CA after t = 2.9 min
Engineering
1 answer:
worty [1.4K]3 years ago
7 0
Can you help me by solving this question

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A power screw is 30 mm in diameter and has a thread pitch of 5 mm. Find the thread depth, the thread width, the mean and root di
ankoles [38]

Answer:

thread depth = 2.5 mm

thread width = 2.5 mm

mean diameter = 27.5 mm

root diameter = 25 mm

lead of screw = 5 mm

Explanation:

given data

power screw diameter D = 30 mm

thread pitch  P = 5 mm

solution

First, we get here thread depth fr square thread

thread depth = \frac{P}{2}   ......................1

thread depth = \frac{5}{2}

thread depth = 2.5 mm

and

thread width for square thread

thread width = \frac{P}{2}   ......................2

thread width = \frac{5}{2}

thread width = 2.5 mm

and

mean diameter is

mean diameter = D - \frac{P}{2}    ................3

mean diameter = 30 - \frac{5}{2}

mean diameter = 27.5 mm

and

root diameter is

root diameter = D - P   ....................4

root diameter = 30 - 5

root diameter = 25 mm

and

lead of screw for single thread so n = 1

so lead of screw = 1 × 5

lead of screw = 5 mm

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Which of the following explains the purpose of a convertible screwdriver?
aliya0001 [1]

Answer:

The correct option is;

To be able to switch between different heads quickly and easily

Explanation:

A screwdriver is a tool or device that has a grip handle which surrounds an extension shaft that has a forged tip that fits into the complementary groove  on a screw head such that by turning the handle while the forged head of the screwdriver sits in a screw head, the screw is turned

A convertible screw driver is built with the capability to easily change the tip or other attributes of the screwdriver quickly.

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Answer:

<h2>True </h2>

because it maybe have been broken or can cause minor accident.

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