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3 years ago

what are the things that a spacecraft should do so it can overcome the challenges of intergalactic travel?

Geography

2 answers:

Greeley [361]3 years ago

7 0

Answer:

Food and Water,Proper Propulsion,Radiation Protection,etc are the things that a spacecraft should do so it can overcome the challenges of intergalactic travel.

Explanation:

Star Wars would have you believe that the greatest challenges to space travel is asteroids, lack of resources like water or fuel, or even the threat of unfriendly, intelligent alien life. But in reality, scientists are finding that the biggest obstacle to today's space travel is dust.

n200080 [17]3 years ago

5 0

Answer:

If a spacecraft is in space for a long time, radiation is a problem. Designers must figure out a way to protect astronauts from the radiation.

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In nuclear fission and fusion reactions mass is converted into energy. The average person in US uses around 100,000,000 J of ene

daser333 [38]

Answer:

a) The yearly energy consumption for a US population of 300 million is $3\times 10^{16} J/year$

b) The energy that would be released if a 60 kg person were converted entirely into energy is $5.4\times 10^{18}$ Joules.

c) 180 years would this amount of energy support a population of 300 million.

Explanation:

a) Average energy consumed by single person of US = 100,000,000 J/year

Then 300 million US citizen will consume:

300 million = 300 × 1,000,000 = $3\times 10^8$

The yearly energy consumption for a US population :

$100,000,000 J/year\times 3\times 10^8=3\times 10^{16} J/year$

The yearly energy consumption for a US population of 300 million is $3\times 10^{16} J/year$

b) $E = m\times c^2$

E = Energy from converted mass of m

c = speed of light

Given mass of person = m = 60 kg

$E=60 kg\times (3\times 10^8 m/s)^2 = 5.4\times 10^{18} J$

c) Energy calculated in part (b) = $E=5.4\times 10^{18} J$

The yearly energy consumption for a US population of 300 million in an year = $3\times 10^{16} J/year$

Let the that would be supported by $5.4\times 10^{18}$ Joules of energy be x.

$x\times 3\times 10^{16} J/year=5.4\times 10^{18} J$

$x=\frac{5.4\times 10^{18} J}{3\times 10^{16} J/year}=180 years$

180 years would this amount of energy support a population of 300 million.

4 0

3 years ago

A playa is a(n) __________. a. natural lake that is dry for long periods of time b. underground water reserve c. man-made freshw

Gre4nikov [31]

The correct option is a. natural lake that is dry for long periods of time.

<h3>What is playa?</h3>

Playas are flat-bottomed depressions that are sometimes surrounded by water which it slowly seeps into the groundwater system or vaporizes into the atmosphere. As a result, salt, sand, and mud are deposited along the depression's bottom and around its edges.

Some key feature of playa are-

Playas are also known as pans, flats, or dry lakes.
They are typically found in inner desert watersheds and close to coasts in arid and semi-arid regions.
The flattest recorded landforms are playas. Typically, their gradients are less than 0.2 meters per kilometer.
Many kilometers of surface may be submerged when only a few centimeters of water are added.
The nearly flawless flatness that is so distinctive of these dry region landforms is developed and maintained by the process of flooding.
The middle, level basins of arid plains are called playas. They need drainage from the inside to a place where evaporation far outweighs intake.
A playa lake arises when the area is inundated, concentrating salts and fine-grained debris.
Playa terminology is somewhat confusing due to the abundance of regional names.

To know more about playa, here

brainly.com/question/9042236

#SPJ4

5 0

1 year ago

What does the title of a map tell you?

madreJ [45]

Answer:

The title of the map is very important, because it is usually the first thing a reader will notice on a map. It provides the reader with information about what is on the map (it is a map of a continent, it is a map of a country or a relief unit).

6 0

2 years ago

Prairie and steppe are which type of biome? A. tundra B. desert C. savanna D. grassland

Katena32 [7]

D) Grassland is the answer

6 0

3 years ago

Which of the following is not a place for hydrogen can be found on earth

Elina [12.6K]

Answer:

the answer is water. hope that helped

5 0

2 years ago