3 years ago

Define escape velocity

1 answer:

4 0

The lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.

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An incompressible viscous fluid flows through a pipe with a flow rate of 1 mL/s. The pipe has a uniform diameter D0 and a length

Nataly [62]

Answer:

$Q_2 = 32$ mL/s

Explanation:

Given :

The flow is incompressible viscous flow.

The initial flow rate, $Q_1$ = 1 mL/s

Initial diameter, $D_1= D_0$

Initial length, $L_1=L_0$

The initial pressure difference to maintain the flow, $P_1=P_0$

We know for a viscous flow,

$\Delta P = \frac{32 \mu V L}{D^2}$

$\Delta P = \frac{32 \mu Q L}{\frac{\pi}{4}D^4}$

$Q \propto \Delta P \times D^4$

$\frac{Q_1}{Q_2}= \frac{P_1}{P_2} \times \left( \frac{D_1}{D_2} \right)^4$

$\frac{1}{Q_2}= \frac{P_0}{2P_0} \times \left( \frac{D_0}{2D_0} \right)^4$

$\frac{1}{Q_2}= \frac{1}{2} \times \left( \frac{1}{2} \right)^4$

$\frac{1}{Q_2}= \frac{1}{32}$

∴ $Q_2 = 32$ mL/s

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3 years ago

Joe has a set up in which the length of the load arm is 20cm and the length of the effort arm is 80cm. What is the mechanical ad

spin [16.1K]

Answer:

Explanation:

Mechanical advantage = effort arm / load arm

MA = 80 cm / 20 cm

MA = 4

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3 years ago

Read 2 more answers

2.5 Critically discuss how community needs may influence your choice of a career

GaryK [48]

Different communities will have a demand for different careers. Areas with a large number of school will have a higher demand for teachers. The community needs professors, pays them well, you might decide to choose that path

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3 years ago

How many gallons of water can you collect on a roof 40'×35' in a 1" rain?

Vedmedyk [2.9K]

The answer to your question should be 630, if you have a roof the size of 40 feet, by 35 feet.

If the roof is 40 inches, by 35 inches, you would have collected 4.36 inches of rain.

Explanation: To calculate this you are going to do this:

Length of the roof ______ feet * width of roof _______ feet * .6 gallons per square feet *.75 * ________ however many inches of rain

* means multiply

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3 years ago

Why is it important for engineers to consider both short and long term implications of their work?

polet [3.4K]

The right answer should be A).

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3 years ago

Define escape velocity​

Define escape velocity