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3 years ago

Suppose you have made the following hypothesis:

Physics

2 answers:

OverLord2011 [107]3 years ago

6 0

Explanation:

counts of sharks observed near a reef and in a nearby section of the ocean

Blizzard [7]3 years ago

3 0

Answer:

Explanation:

You could look up the shark population near specific coral reefs. You could also go the simple route and say something like, "sharks eat fish so, sharks will go where the fish are and if there are fish in the coral reefs, (which there are) they would be most likely to go there". I know this may not be the answer you were looking for but its the best I've got.

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The combined electrical resistance R of two resistors R_1 and R_2, connected in parallel, is given by 1/R = 1/R_1 + 1/R_2 where

Orlov [11]

Answer:

$0.6\Omega/s$

Explanation:

We are given that

$R_1=150\Omega$

$R_2=75\Omega$

$\frac{dR_1}{dt}=1\Omega/s$

$\frac{dR_2}{dt}=1.5\Omega/s$

We have to find the rate at which R is changing.

In parallel

$\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}$

Using the formula

$\frac{1}{R}=\frac{1}{50}+\frac{1}{75}=\frac{3+2}{150}=\frac{5}{150}=\frac{1}{30}$

$R=30\Omega$

$-\frac{1}{R^2}\frac{dR}{dt}=-\frac{1}{R^2_1}\frac{dR_1}{dt}-\frac{1}{R^2_2}\frac{dR_2}{dt}$

$\frac{1}{R^2}\frac{dR}{dt}=\frac{1}{R^2_1}\frac{dR_1}{dt}+\frac{1}{R^2_2}\frac{dR_2}{dt}$

Substitute the values

$\frac{1}{900}\frac{dR}{dt}=1\times\frac{1}{2500}+1.5\times\frac{1}{(75)^2}$

$\frac{dR}{dt}=900(\frac{1}{2500}+\frac{1.5}{5625}$

$\frac{dR}{dt}=0.6\Omega/s$

7 0

3 years ago

A systematic error in data is called

d1i1m1o1n [39]

<span>an error having a nonzero mean, so that its effect is not reduced when observations are averaged.</span>

7 0

3 years ago

Which of the following types of technologies has best helped scientists to study very high-energy objects in outer space, such a

erica [24]

Very high-energy objects and events spit out very high-energy photons, so the instrument you need in order to detect them is the X-ray telescope. <em>(C) </em>

Inconveniently, X-ray telescopes only work when they're up in orbit, because X-rays get seriously soaked up in Earth's atmosphere, and most of them never make it down to the surface ... (lucky for us !) .

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3 years ago

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As you know, the oceans cover most of the earth, and contain a huge amount of resources. Protecting these resources is one reaso

matrenka [14]

A is the answer your looking for

8 0

3 years ago

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If wave A has twice the amplitude and three times the frequency as wave B, then the energy carried by wave A must be ____ times

soldier1979 [14.2K]

Answer: