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VMariaS [17]
4 years ago
8

Why are units of measurement useful?

Physics
2 answers:
Zanzabum4 years ago
5 0

Without the ability to measure, it would be difficult for scientists to conduct experiments or form theories. Not only is measurement important in science and the chemical industry, it is also essential in farming, engineering, construction, manufacturing, commerce, and numerous other occupations and activities.

kondor19780726 [428]4 years ago
4 0

They set a common stadard by which all involved can understand the context of what is being evaluated.

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Northrop aircraft developed and built a deceleration sled to test the effects of the extreme forces on humans and equipment. In
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20 hours i think that what they do
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3 years ago
Vector c has a magnitude 24.6 m and is in the direction of the negative y-axis. vectors a and b are at angles α = 41.4° and β
storchak [24]
The vector c has a magnitude of 24.6m and it is in the negative y direction. Therefore
\vec{c} = - 24.6 \hat{j}

The vector b is 41.4° up from the x-axis. Therefore
\vec{b} = b[cos(41.4^{o}) \hat{i} + sin(41.4^{o}) \hat{j} ] =b(0.75\hat{i} + 0.6613 \hat{j})

The vector a is 27.7° up from the x-axis. Therefore
\vec{a} = a[cos(22.7^{o})\hat{i} + sin(27.7^{o})\hat{j}] =  a(0.8854\hat{i} + 0.4648\hat{j})

Because \vec{a} +\vec{b} + \vec{c} = 0, the sum of the x and y components should be zero. Therefore,
For the x-component,
0.8854a + 0.75b = 0
 or
 a + 0.847b = 0                            (1)
For the y-component,
0.4648a + 0.6613b - 24.6 = 0
 or
 a + 1.4228b = 52.926                (2)

Subtract (1) from (2).
0.5758b = 52.926
b = 91.917
a = -0.847b = -77.854

Answer:
The magnitude of vector a is -77.85 m
The magnitude of vector b is 91.92 m
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4 years ago
Given the displacement vector D = (4î − 8ĵ) m, find the displacement vector R (in m) so that D + R = −3Dĵ. (Express your answer
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Answer:

--------------------------------

Explanation:

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3 years ago
A student in the Biomechanics class has decided that she would like to make her arms
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Answer:

what is heat and transfer

7 0
3 years ago
What type of galaxy is M82 based on its appearance in the visible-light view?
SSSSS [86.1K]
<h2>Answer: irregular</h2>

According to Hubble  galaxies are classified into elliptical, spiral and irregular.

 

It should be noted this classification is based only on the visual appearance of the galaxy, and does not take into account other aspects, such as the rate of star formation or the activity of the galactic nucleus.  

The classification is as follows:  

1. Elliptical galaxies: Their main characteristic is that the concentration of stars decreases from the nucleus, which is small and very bright, towards its edges. In addition, they contain a large population of old stars, usually little gas and dust, and some newly formed stars.  

2. Spiral galaxies: They have the shape of flattened disks containing some old stars and also a large population of young stars, enough gas and dust, and molecular clouds that are the birthplace of the stars.  

3. Irregular Galaxies:  Galaxies that do not have well-defined structure and symmetry.  

In this context, galaxy M82 does not match with the first two types of galaxies, because it has not a defined shape.

Therefore, M82 is an  irregular galaxy.

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3 years ago
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