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Colt1911 [192]
3 years ago
14

Write a paragraph about Space Manned Exploration (100 pts)

Chemistry
2 answers:
sashaice [31]3 years ago
8 0
Space Manned Exploration, more commonly known as Human spaceflight, is a type of space travel that launches to space with a spacecraft, including crews or regular passengers. The very first launching program that NASA made was back in 1958 was the Project Mercury with the goal for the first human put into Earth's orbit to survive and come back safely. Other famous spaceflights include the 1969's first moon landing of <span>Neil Armstrong and Edwin "Buzz" Aldrin. Today, NASA has confirmed another attempt to make a spaceflight to the moon in 2020 or 2023. We aren't far from those dates, so let's see what they can do! 


</span>
Ray Of Light [21]3 years ago
6 0

In the very beginning of the era of space exploration each new discovery definitely weighed a lot. The humanity has learnt many new amazing things and it is natural that we want to know more and more. However, do we have enough technology and intelligence for it?

Sian Meaney, a journalist and researcher at Cherwell College in Oxford, the UK, writes that such giants as China and Russia have recently made no claims to the scientific benefits of manned missions. Nevertheless, space exploration takes the money that could be spent on the development of “earthly” sciences, or on the exploration of the planet Earth itself.

The supporters of manned space missions argue that it is so natural for the human to explore new territories and acquire new knowledge. But don’t the secrets of our planet suffice to satisfy scientists’ interest? Can’t complex human body and soul be the main subjects of heavily invested studies? We still do not know the entire truth about our world. So, how dare we intrude on the one where our laws do not work?

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What volume, in mL, of concentrated 16 M nitric acid would you need to use in order to prepare 500.0 mL of a 0.250 M HNO3(aq) so
shtirl [24]

Given :

Initial concentration of nitric acid, C_1 = 16\ M.

Final concentration of nitric acid, C_2 =  0.250 \ M.

Volume of HNO_3, V _2= 500\ mL = 0.5\ L .

To Find :

Volume needed( V_1 ).

Solution :

We know,

C_1V_1 =C_2V_2\\\\16 \times V_1 = 0.250 \times  0.5 \\\\V_1 = \dfrac{0.250 \times  0.5}{16}\\\\V_1 = 0.0078125\ L = 7.8125 \ mL

Hence, this is the required solution.

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3 years ago
PLS HELP Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement
iVinArrow [24]

Answer:

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3 years ago
If you have a block of plastic and a block of copper that are the same mass and are placed in the sun for 10 minutes. What is th
LuckyWell [14K]

INFORMATION:

Is given that:

- if you have a block of plastic and a block of copper that are the same mass and are placed in the sun for 10 minutes.

And after the 10 minutes copper has a higher temperature.

We must determine the reason.

STEP BY STEP EXPLANATION:

To determine it, we need to know the concept of specific heat

If the block of copper has a higher temperature after 10 minutes, that means copper needs less heat to raise its temperature.

So, plastic has a higher specific heat than metal, so it takes more energy to heat plastic than copper. As a result, plastic would heat up more slowly.

ANSWER:

The explanation for the copper having a higher temperature after 10 minutes in the sun, is that plastic has a higher specific heat than metal, so it takes more energy to heat plastic than copper. As a result, plastic would heat up more slowly. Since the copper has a lower specific heat, it will be heat quickly.

5 0
1 year ago
You are given 600 grams of sodium chloride (NaCl), but you are planning to purify the substance and extract just the sodium. How
Eddi Din [679]

Answer:

236.02 grams of Na is produced by 600g of NaCl.

Explanation:

NaCl --> Na+Cl-

to find the number of moles NaCl has, divide the grams over the molar mass which is 600/58.44

number of moles of nacl= 10.2 moles

then turn moles back to grams which is moles x molar mass

10.2 moles x 22.9 mass

= 236.02 grams

4 0
3 years ago
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Zinaida [17]

Answer:

See below!

Explanation:

Solids have a definite mass, a definite shape, and a definite volume.  They are not compressible and are the most tightly packed together.

Liquids have definite mass and definite volume.  Liquids take up the shape of the container and are not compressible.  They are slightly packed together but are allowed to move freely.

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