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kaheart [24]
2 years ago
15

Pieces of Earth's crust move on top of the: Group of answer choices outer core ocean inner core mantle

Biology
1 answer:
AnnZ [28]2 years ago
6 0

Answer:

mantle

Explanation:

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Use kepler's third law to find the collapse time, assuming the star has the same mass as the sun.
kap26 [50]
Thank you for posting your question here at brainly. Below is the solution for the above problem. I hope it helps. 

period of orbit at 26000 AU 
<span>P = a^(3/2) </span>
<span>= (26000)^(3/2) = 4,192,374 years (Earth)</span>
6 0
2 years ago
Sound waves travel through gas liquid and solids A) True B) False
Novay_Z [31]

Answer:

True.

Explanation:

  • Sound is a form of Energy that produces a sensation of hearing in our ears.
  • Sound is produced as a result of vibration produced in a body.
  • Sound energy is transmitted from one place o other place by wave motion.
  • When a body vibrates, the particles of medium surrounding it starts vibrating about their mean position.
  • During vibration, they collide with the surrounding particle and transfer some energy to them.
  • They then start vibrating faster and transferring  energy to the next surrounding particle. This process continues till the vibration reaches a person ear.
  • Thus, particles are an important factor in propagation of sound.
  • Sound cannot travel in vacuum.
  • It requires a medium to travel from one point to another.
  • A sound can travel in all medium, solids, liquids and gases as all of these have particles.
  • The speed of sound is highest in solids and lowest in gases as the inter molecular space is largest in gases and smallest  in solids.
4 0
3 years ago
The probable reason for the increase of carbon dioxide is _____.
DaniilM [7]
D, because if you burn fossil fuel the smoke while burning the fossil fuel is carbon dioxide and we live off fossil fuel and that means we use a lot of fossil fuel.
3 0
3 years ago
Which of these is not a property of lymphatic capillaries?
Inessa05 [86]

Answer:

They are smaller than blood capillaries.

Explanation:

Lymphatic capillaries drains the extracellular fluid present between the cell spaces. The fluid is known as lymph as it enters the lymph capillaries. These capillaires drains into lymph vessels that drains to lymph nodes and lymph ultimately enters the venous circulation.

Lymphatic capillaries are slightly larger than blood vessels and these capillaries have close ends. The walls of lymph capillaries are made up  of endothelial cells. The endothelial cells overlap in lymph vessels and when the pressure in ECF is greater these cells move and create a sort of gap for the movement of ECF inside the lymph capillary but when the pressure inside the capillary is greater these cells again overlap and does not allow the lymph to move outside of capillary. Thus lymph capillaries only allow the ECF to enter the capillary but does not allow the lymph to go out from capillary. Lymph capillaries have greater internal pressure than blood vessels.

7 0
3 years ago
At which stage shown below does the frog use both skin and lungs for gas exchange
a_sh-v [17]

Frogs, like salamanders, newts and toads, are amphibians. Most amphibians begin their life cycles as water-dwelling animals, complete with gills for breathing underwater. As they grow to adulthood, amphibians normally become land-dwelling creatures, lose their gills and develop lungs for breathing. Frogs are no exception to this process and are able to breathe through their lungs once they reach adulthood.

Larval Stage

Frogs still in the larval stage, called tadpoles, are very different in outward appearance and internal physiology from their adult counterparts. Most notable is the presence of gills instead of lungs during this stage. Tadpoles can also take in oxygen through their skin, a trait that aids in gas exchange (bringing in oxygen and expelling carbon dioxide, as with lung respiration) while the tadpole is living completely underwater.

Maturation

As a frog matures from tadpole to adult, it loses its gills and develops functioning lungs. During this transition, and after maturity, frogs are still able to breathe through their skin. This trait is known as “bimodal breathing,” in which an animal uses two different systems for bringing in oxygen. These two different breathing systems allow adult frogs to shift between aquatic habitats (which require skin respiration) and land habitats (which are more suited to lung respiration) with ease.

Skin Respiration

An adult frog’s thin and permeable skin allows it to take in oxygen, even when completely submerged. Oxygen readily passes through this thin membrane-like skin, providing the frog with the oxygen it needs to stay alive under water without the need for gills. Because of the permeability of a frog’s skin, moisture is lost easily and most frogs must remain in a moist or humid environment in order to retain their water levels.

Lung Respiration

Compared with many other amphibians, frogs have relatively well-developed and complex lungs, which are subdivided and contain many alveoli—tiny sacs that are responsible for gas exchange within the lungs. Unlike mammals that control their breathing with the diaphragm, frogs use their mouths and nostrils in tandem to bring air into their lungs. When a frog breathes in, it lowers the floor of its mouth and relaxes its throat. Then it opens its nostrils to allow air to enter into the newly expanded mouth and throat, at which point the frog contracts its mouth floor and forces air into the lungs.

3 0
3 years ago
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