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galben [10]
2 years ago
9

How does a star produce energy? How is this different from a power plant and combustion (fire)?

Geography
1 answer:
SCORPION-xisa [38]2 years ago
4 0

Answer:

Hydrogen in the core of the star is converted to helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and contracts.

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In general the warmest biomes in the world are found _______. a. at the poles b. in the southern hemisphere c. near the equator
Darya [45]

Answer:

D I think

Explanation:

In the west there are warmer places

(Sorry if it's wrong im new)

6 0
1 year ago
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. A small puddle is frozen and its temperature is 0 oC. How much solar energy is needed to melt 10 kg of ice? Now assume that th
ozzi

Answer:

3758 kJ

Explanation:

Given:

Mass of the ice = 10 kg = 10 × 1000 = 10,000 g

Initial temperature of the ice = -20° C

Now,

The ice will start to melt when it will reach a temperature of 0° C

and, specific heat of ice, C = 2090 J/kg

Therefore,

Heat required to heat the ice from -20° C to 0° C

Q₁ = mCΔT

or

Q₁ = 10 × 2090 × (0 - (-20 ))

or

Q₁ = 418000 J

also,

Heat of fusion required to change the ice into liquid without any change in temperature.

For ice the heat of fusion = 334 J/g

Hence,

Energy needed by ice to melt, Q₂ = 334 × 10,000 J = 3,340,000 J

Hence, the total heat required = Q₁ + Q₂

= 418000 J + 3,340,000 J

= 3758000 J

= 3758 kJ

3 0
3 years ago
The land north of the river suir
dem82 [27]

Answer:

kilkenny ireland

Explanation:

8 0
3 years ago
Which of the following is INCORRECT? (A) Indonesia is this realm’s “giant” country.(B) The Mekong River crosses five Southeast A
tresset_1 [31]

Answer:

The correct answer is D. It is incorrect that Southeast Asia can be considered a buffer zone.

Explanation:

In geography, a buffer zone is an area that serves the purpose of keeping two or more areas (often, but not necessarily, countries) at a distance from each other, for any reason. The most common types of buffer zones are demilitarized zones and some restrictive comfort zones and green belts. These areas can be, but not necessarily, composed of a sovereign state, forming a buffer state.

Buffer zones can be created to prevent violence, protect the environment, protect residential and commercial areas from industrial accidents or natural disasters, keeping prisoners with the intention of escaping by quickly acquiring hostages or a hiding place, or possibly by others reasons.

Buffer zones often result in large uninhabited regions (similar to nature reserves, although without tourism) that by themselves are notable in many increasingly paved / busier developed parts of the world.

In the case of Southeast Asia, it cannot be considered a buffer zone, because although it separates Oceania from mainland Asia, there are no political reasons to consider such separation. Likewise, it is a very densely populated area, with its own culture and idiosyncrasies, which go beyond its geographical position.

5 0
3 years ago
What are the characteristic of a hunter-gatherer
guapka [62]
They hunt and gather food they may be nomadic or move a lot
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3 years ago
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