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exis [7]
3 years ago
7

What is the specific gravity means and how does specific gravity related to solid materials,

Biology
1 answer:
madreJ [45]3 years ago
5 0
<span>Specific gravity is the mass or density of a substance expressed as a ratio of the same volume of that substance in a standard reference substance. For solids, the reference substance is usually water. For example, if solid substance Z has a specific density of 1.5, that means that solid substance Z weighs 1.5 times as much as the standard substance (water).</span>
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Que características poseen los babuinos que no poseen los Lemures
Vedmedyk [2.9K]

Answer:

Opposing thumbs, expressive faces, complex social systems: it's hard to miss the similarities between apes and humans. Now a new study with a troop of zoo baboons and lots of peanuts shows that a less obvious trait -- the ability to understand numbers -- also is shared by humans and their primate cousins.

"The human capacity for complex symbolic math is clearly unique to our species," says co-author Jessica Cantlon, assistant professor of brain and cognitive sciences at the University of Rochester. "But where did this numeric prowess come from? In this study we've shown that non-human primates also possess basic quantitative abilities. In fact, non-human primates can be as accurate at discriminating between different quantities as a human child."

"This tells us that non-human primates have in common with humans a fundamental ability to make approximate quantity judgments," says Cantlon. "Humans build on this talent by learning number words and developing a linguistic system of numbers, but in the absence of language and counting, complex math abilities do still exist."

Cantlon, her research assistant Allison Barnard, postdoctoral fellow Kelly Hughes, and other colleagues at the University of Rochester and the Seneca Park Zoo in Rochester, N.Y., reported their findings online May 2 in the open-access journal Frontiers in Comparative Psychology. The study tracked eight olive baboons, ages 4 to 14, in 54 separate trials of guess-which-cup-has-the-most-treats. Researchers placed one to eight peanuts into each of two cups, varying the numbers in each container. The baboons received all the peanuts in the cup they chose, whether it was the cup with the most goodies or not. The baboons guessed the larger quantity roughly 75 percent of the time on easy pairs when the relative difference between the quantities was large, for example two versus seven. But when the ratios were more difficult to discriminate, say six versus seven, their accuracy fell to 55 percent.

That pattern, argue the authors, helps to resolve a standing question about how animals understand quantity. Scientists have speculated that animals may use two different systems for evaluating numbers: one based on keeping track of discrete objects -- a skill known to be limited to about three items at a time -- and a second approach based on comparing the approximate differences between counts.

Explanation:

4 0
2 years ago
Acording to erikson what is the first stage of psychosocial development?
Lilit [14]

Answer:

The answer would be trust .vs. mistrust

Explanation:

This is the first stage

Mark as branliest please :)

7 0
3 years ago
When conducting scientific research, appropriate methods must be used to find information that is reliable and valid. Angela was
weeeeeb [17]

Answer:

D. Type in human immune system + HIV effects.

Explanation:

Since Angela is focusing more on the human immune system and the effects of HIV could have on it, the keywords combination that would produce the most relevant search result has to contain human, immune system and HIV effects.

Option A has human, body systems and HIV, immune is absent.

Option B contains immune system and human, no HIV effects.

Option C contains HIV and immune system, no human.

All the options are lacking in some ways and will not produce the most relevant search results.

The correct option is D. It has all the necessary keywords.

3 0
3 years ago
Which of these lists present the stages of the cell cycle in the correct order
asambeis [7]

Answer:

G1 , S , G2 , Mitosis

G1, S, and G2 are known as Interphase.

8 0
3 years ago
Which of the following actions is most likely to have a negative effect on Earth's ecosystems?
padilas [110]
C. An increase in human population
5 0
2 years ago
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