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Colt1911 [192]
3 years ago
14

In determining liquid propellant performance a combination of A. High chemical energy & high molecular weight B. High chemic

al energy & low molecular weight C. Low chemical energy & low molecular weight D. Great taste & less filling
Engineering
1 answer:
Anna11 [10]3 years ago
3 0

Answer: B) High chemical energy and low molecular weight

Explanation: Liquid propellant is a a single chemical compound or mix of other chemicals as well. It is used in the rocket that uses them as a major part for the fuel. A liquid propellant is supposed to have high chemical energy and low molecular weight so that is can be ignited with ease. High chemical energy can release good amount of heat in a chemical reaction and thus is good igniting compound for the liquid propellant rocket.

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Two vertical, parallel clean glass plates are spaced a distance of 2mm apart. if the plates are placed in water, how high will t
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Answer with Explanation:

The capillary rise in 2 parallel plates immersed in a liquid is given by the formula

h=\frac{2\sigma cos(\alpha )}{\rho gd}

where

\sigma is the surface tension of the liquid

\alpha is the contact angle of the liquid

\rho is density of liquid

'g' is acceleratioj due to gravity

'd' is seperation between thje plates

Part a) When the liquid is water:

For water and glass we have

\sigma =7.28\times 10^{-2}N/m

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Applying the values we get

h=\frac{2\times 7.28\times 10^{-2}cos(0)}{1000\times 9.81\times 2\times 10^{-3}}=7.39mm

Part b) When the liquid is mercury:

For mercury and glass we have

\sigma =485.5\times 10^{-3}N/m

\alpha =138^o

\rho _{w}=13.6\times 10^{3}kg/m^3

Applying the values we get

h=\frac{2\times 485.5\times 10^{-3}cos(138)}{13.6\times 1000\times 9.81\times 2\times 10^{-3}}=-2.704mm

The negative sign indicates that there is depression in mercury in the tube.

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If an individual is caught smoking in high school, what aspect of life would the differential association theorist be interested
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The aspect of life that would the differential association theorist be interested in order to understand how that person started smoking is option a: smoking habits of peers, family, and friends.

<h3>Is smoking a habit or a lifestyle?</h3>

The act of Smoking is known to be a hard habit that is said to be difficult to break for a lot of reasons.

Note that it is one where a person is said to be only  nicotine addictive, but smokers are said to be the smoke multiple times a day.

Therefore, The aspect of life that would the differential association theorist be interested in order to understand how that person started smoking is option a: smoking habits of peers, family, and friends

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See full question below

If an individual is caught smoking in high school, what direction would a differential association theorist go in examining how that person started smoking?

smoking habits of peers, friends, and family

strain caused by society's structure that leads to smoking

the student's self-control

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