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Brilliant_brown [7]
3 years ago
13

What is a dorsal fin?​

Geography
2 answers:
Anna35 [415]3 years ago
7 0

A dorsal fin is a tall, triangular fin on the back of an animal such as a fish, a whale, or a dolphin.

Diano4ka-milaya [45]3 years ago
3 0

Answer:

yes

Explanation:

you shouldn't need an explanation

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World oil reserves amount to about 10,000 EJ, and humankind uses energy at the rate of roughly 18 TW. If all our energy came fro
Volgvan

Answer:

t=17.61 years.

Explanation:

Given that

Reserve of energy = 10,000 EJ

Energy used by human = 18 TW

We know that

1\ E= 10^{18}

1\ T= 10^{12}

So

Reserve\ of\ energy = 10,000 \times10^{18} J

Reserve\ of\ energy = 10^{22} J

Energy\ used\ by\ human = 18 \times10^{12}\ W

Lets t time after energy will be  exhaust

So

18 \times10^{12}\times t=10^{22}

t=\dfrac{10^{22}}{18 \times10^{12}}\ s

t=5.55\times 10^8 \ s

We know that

1 year = 365 days

1 year = 365 x 24 hr

1 year = 365 x 24 x 3600 s

1year =3.15\times 10^7\ s

So

t=\dfrac{5.55\times 10^8 }{3.15\times 10^7}

t=17.61 years.

5 0
3 years ago
The outer planets are made mostly of gas which makes them
Lesechka [4]

Answer:

less dense than the solid inner planets.

Explanation:

A planet can be defined as a large celestial body having sufficient mass to allow for self-gravity and make it assume a nearly circular shape (hydrostatic equilibrium), revolves in an orbit around the Sun in the solar system and has a cleared neighborhood.

Basically, the planets are divided into two (2) main categories and these includes;

I. Outer planets: these planets are beyond the asteroid belt and comprises of jupiter, saturn, uranus and neptune, from left to right of the solar system.

II. Inner planets: these planets are the closest to the sun and comprises of mercury, venus, earth and mars.

The outer planets are made mostly of gas (hydrogen and helium) which makes them less dense than the solid inner planets. These gases are generally known to be less dense in terms of physical properties.

5 0
3 years ago
How many longitude lines go through the South Pole?
nevsk [136]

Answer:

I agree I think it is 90 :)

Explanation:

7 0
3 years ago
In the diagram, the only figure that could be parallel to line
expeople1 [14]
ANSWER: line b

I hope this answer is right
3 0
4 years ago
What cultural description is often used to describe the earliest civilizations in this region (Mesopotamia)?
Mrrafil [7]
The answer is C. The Fertile Crescent 

Hope i helped
8 0
3 years ago
Read 2 more answers
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