FISH A puffer fish is able to “puff up” when threatened
by gulping water and inflating its body
. The puffer fish at the right is approximately a sphere with a diameter of 5 inches. Its surface area when inflated is about 1.5 times its normal surface area.
How do you find the area of the great circle?
The great circle (with area
πr
2
, obv
) covers about a fourth of the sphere. Actually, it covers exactly a fourth of the sphere. That means our surface area for the entire sphere is four times the area of the great circle.
What is a great circle circumference?
The circumference is
the length of any great circle, the intersection of the sphere with any plane passing through its centre
. A meridian is any great circle passing through a point designated a pole. A geodesic, the shortest distance between any two points on a sphere,…
What is the volume of the hemisphere round to the nearest tenth?
The volume of the hemisphere to the nearest tenth is
144347.8
.
What is the adaptation of a puffer fish?
They are named for their
ability to inflate themselves to several times their normal size by swallowing water or air when threatened
; the same adaptation is found in the closely related porcupinefish, which have large conspicuous spines (unlike the small, almost sandpaper-like spines of puffer fish).
Does puffing up hurt pufferfish?
Unfortunately, while puffing up can successfully discouraging predators,
it also can be quite harmful for the pufferfish, sometimes leading to death
.
What is great circle formula?
The great circle formula is given by:
d = rcos
– 1
[cos a cos b cos(x-y) + sin a sin b]
. Given: r = 4.7 km or 4700 m, a, b= 45°, 32° and x, y = 24°,17°.
How many great circles are there on Earth?
There are
an infinite number
of great circles that can be drawn on any perfect sphere. The longitude lines on a globe all form great circles that pass through the same two points (the North Pole and the South Pole). The Equator is another great circle.
How many great circles can a sphere have?
| Term Part of Speech Definition | sphere noun round object . |
|---|
What is perimeter of semicircle?
The perimeter of a semicircle is
the sum of the half of the circumference of the circle and diameter
. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius. Therefore, The perimeter of Semicircle = (1/2) π d + d.
What is hemisphere area?
As the Hemisphere is the half part of a sphere, therefore, the curved surface area is also half that of the sphere. Curved surface area of hemisphere = 1/2 ( 4 π r
2
) =
2 π r
2
.
Why Equator is known as great circle?
A great circle has the same boundary and same centre point as its sphere. Great circles are seen on all meridians on Earth. All the lines of longitude meet at the poles, intersecting the Earth in half. Thus
a great circle always splits the Earth into two halves
, so that the Equator is a great circle.
How do you find the radius of a hemisphere?
How can I calculate radius of a hemisphere? You would have to know other information. If, for example, you know the surface area (A) of the hemisphere, divide it by 2π, then find the square root of that number. Thus,
r = √(A / 2π)
.
How do you find the radius of a hemisphere when given the volume?
Hemisphere Formulas in terms of radius r:
V = (2/3)πr
.
What is the volume of a hemisphere?
The volume of a hemisphere is half the volume of a sphere, therefore, it is expressed as, Volume of hemisphere =
2πr
3
/3
, where r is the radius of the hemisphere.
What are 2 adaptations about puffer fish?
In lieu of escape, pufferfish use their
highly elastic stomachs and the ability to quickly ingest huge amounts of water (and even air when necessary) to turn themselves into a virtually inedible ball several times their normal size
. Some species also have spines on their skin to make them even less palatable.
What is a behavioral adaptation of a fish?
Besides mouth, tail, and body shape, fish may also possess behavioral adaptations too. Many fish have
spines, barbs, or fangs for defense
. There are even fish that display warning colors to warn predators of their toxicity. Some fish are known as sequential hermaphrodites, meaning they can swap genders.
What is the behavioral adaptation?
Behavioral adaptation:
something an animal does usually in response to some type of external stimulus in order to survive
. Hibernating during winter is an example of a behavioral adaptation.
What happens if a puffer fish inflates above water?
This is because if a puffer inflates while out of the water,
it fills with air
, a situation that often proves fatal. A puffer cannot expel air from its expanded stomach, and will float upside down on the surface of the water until it dies.
Can puffer fish only puff once?
Puffers don’t wear out their ability to puff.
They are able to puff as many times as they like
. Actually, they do not “like” to puff, so they are able to puff any time they feel threatened their entire life.
Can you touch a puffer fish?
What happens if u touch a puffer fish? Poison spikes: One of the adaptations that helps the pufferfish survive is the ability to produce a poison known as tetraodotoxin. This toxin is secreted across their body, making
puffers dangerous to touch
and even more dangerous to consume.
How does great circle end?
As their flight reaches the final stage, they land in Antarctica. Eddie does not believe that they will survive and chooses to stay behind. Marian continues, but her plane develops a leak. She deliberately crashes the plane and lets the world believe she is dead.
How do you make a great circle sailing?
Is the latitude?
Latitude
measures the distance north or south of the equator
. Lines of latitude, also called parallels, are imaginary lines that divide the Earth. They run east to west, but measure your distance north or south. The equator is the most well known parallel.
Is equator a rhumb line?
All parallels, including the equator, are rhumb lines
, since they cross all meridians at 90°. Additionally, all meridians are rhumb lines, in addition to being great circles.
What is parallel of latitude?
The parallel of latitude is
an imaginary line around the Earth that is parallel to the equator
. An example of a parallel of latitude is the Arctic Circle that runs east – west around the Earth at a latitude of 66° 33′ 44′′.
What is a sphere cut in half called?
A hemisphere
is the half sphere formed by a plane intersecting the center of a sphere. The cut-line forming a hemisphere is a great circle.
