Lo siento, este en ingles
Explanation:
Hydrogen and helium are found in all stars. Ninety percent of all atoms in the universe are hydrogen atoms and fusion reactions fuel stars, resulting in the formation of helium and higher atomic number elements. This is the case because of the Big Bang, when temperatures were so high that only energy could exist.
Answer:
V ≈ 4577.204 cm^3
Explanation:
Use the volume formula V=4/3πr^3 to find the volume. Since you need the radius but are given the diameter, divide it by 2 to get half.
21.4/2 = 10.7
Now plug that into the formula and solve:
V=4/3πr^3
V=4/3π(10.7)^3
V= 4/3π(1,092.7272)
V= 4/3 * 3432.903
V= 4 * 3432.903/3
V = 13731.614/ 3
V ≈ 4577.204 cm^3 or whatever unit is stated.
Answer:
great oil reserves that encourage economic activities such as oil pro- duction. ... Agriculture plays a smaller role in many countries, such ... leum or natural gas—to make fertilizers, medi- ... duction are important in both Southwest Asia and ... on the earth, producing an even greater strain on water resources
Explanation:
There is no doubt Antarctica is an incredible tourist destination. It is a magnificent and largely uninhabited wilderness with majestic mountains, glaciers, icebergs and abundant wildlife. Its remoteness, inaccessibility and severe climate add an element of adventure to a visit to Antarctica.
Visitor numbers have increased rapidly over the last few decades. During the 1998-99 summer season, over 10,000 tourists visited Antarctica compared with less than 2,000 19 years ago. Tours are organised by private companies and people from all over the world make the journey to see the icy continent.
The trend of increasing visitor numbers has led the Antarctic Treaty countries to establish guidelines and regulations to minimise the impact of these visitors on this remarkable environment.
Answer:
A. technology can be used to overcome physical barriers and boundaries
Explanation:
The ability to dam water and use of improved transportation are clear proofs of how we can overcome physical barriers and boundaries.
- Dam water is an engineering revolution by which water can be made available all year round.
- Also, damage to the ecosystem caused by excess water is circumvented.
- Roads that are pliable are of huge important in breaching geographical imitations. A good transport system can make use of this connectivity.
- Air transportation has improved the ease of travel and reduced travel time greatly.
- Both dams and good transportation are clear engineering solutions to overcome limitations of nature.
