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3 years ago

What is specific gravity? How is it related to density?

Engineering

1 answer:

mart [117]3 years ago

6 0

Answer:

Specific gravity is defined as the ratio of the Densities of the two substances.

Specific gravity = $\frac{\textup{Density of substance}}{\textup{1000}}$

Explanation:

Specific gravity is defined as the ratio of the Densities of the two substances.

For the standardization, the density ration of densities is calculated with respect to the density of water i.e the denominator is the density of water.

Specific gravity = $\frac{\textup{Density of substance}}{\textup{Density of water}}$

Also,

At STP density of water is 1000 Kg/m³

Therefore the relation between the specific gravity and density is,

The Specific gravity = $\frac{\textup{Density of substance}}{\textup{Density of water at STP}}$

Specific gravity = $\frac{\textup{Density of substance}}{\textup{1000}}$

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A wing generates a lift L when moving through sea-level air with a velocity U. How fast must the wing move through the air at an

vredina [299]

Answer:

V1 = 1.721 * V2

Explanation:

To start with, we assume that both lift forces are equal, such that

L2 = L1

1 is that of the level at 10000 m, and 2 is that of the level at sea level.

Next, we try and substitute the general formula for both forces such that

C(l).ρ1/2.V1².A = C(l).ρ2/2.V2².A

On further simplification, we have

ρ1.V1² = ρ2.V2², making V1 subject of formula, we have

V1 = √(ρ2/ρ1). V2²

Using the values of density for air at 10000 m and at sea level(source is US standard atmosphere), we have

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4 0

3 years ago

Write a Nested While Loop that will increment the '*' from 1 to 10.

andrey2020 [161]

Answer:

The program is as follows:

i = 1

while(i<11):

j = 1

while(j<=i):

print('*', end = '')

j += 1

i += 1

print()

Explanation:

Initialize i to 1

i = 1

The outer loop is repeated as long as i is less than 11

while(i<11):

Initialize j to 1

j = 1

The inner loop is repeated as long as j is less than or equal i

while(j<=i):

This prints a *

print('*', end = '')

This increments j and ends the inner loop

j += 1

This increments i

i += 1

This prints a blank and ends the inner loop

print()

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3 years ago

a sprue is 12 in long and has a diameter of 5 in at the top. The molten metal level in the pouring basing is taken to be 3 in fr

vampirchik [111]

Answer:

See explaination

Explanation:

We can describe Aspiration Effect as a phenomenon of providing an allowance for the release of air from the mold cavity during the metal pouring.

See the attached file for detailed solution of the given problem.

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3 years ago

Read 2 more answers

Does somebody know how to do this?

maksim [4K]

No I don’t sorry, I hope you do well

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3 years ago

we wish to send at a rate of 10Mbits/s over a passband channel. Assuming that an excess bandwidth of 50% is used, how much bandw

gayaneshka [121]

Answer:

QPSK: 7.5 MHz

64-QAM:2.5 MHz

64-Walsh-Hadamard: 160 MHz

Explanation:

See attached picture.

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3 years ago