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vampirchik [111]
3 years ago
15

Which is an effect of short-term environment changes

Biology
1 answer:
Dovator [93]3 years ago
5 0

drought, smog, flooding, volcanic eruption, blizzards, and pollution

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How do environmental scientists use technology to track the invasive species<br> silver carp?
amid [387]

Explanation:

Environmental Scientists can use GPS tagging, aerial monitoring (from a plane), RFID tags (radio frequency identification device), and/or hidden cameras to track and monitor polar bears.

8 0
3 years ago
An eye that can see far away object clearly but which can’ t clearly focus on objects that are 25 cm from the lens of the eye is
iVinArrow [24]

Answer:

a. When glasses (or contact lenses) are used to correct nearsightedness, the lens should form the image at the far point.

b. If a nearsighted person has a far point df that is 3.50 m from the eye, what is the focal length f1 the contact lenses that the person would need to see an object at infinity clearly?

f 1 = -3.50 m

Explanation:

a. Nearsightedness (the person cannot focus on the far point objects) physics of eyesight correction,  can be resolved by using focal length of concave lens as the corrective lens, which correct the eyesight artificially, as the eye’s lens bends the rays from a distant object too much and the rays are brought to a focus before they reach the retina.  A diverging lens bends the ray outwards before they reach the eye’s lens and the rays are brought to a focus on the retina.  

The lens formula to find the focal length of the lens is:

                      1/f = 1u + 1/v

Where, f is the focal length of the lens, u is the object distance, and v  is the image distance.

The light lands in front of the retina, so the image is forming in front of the retina .When concave lens used as a corrective lens the clear vision is achieved, helping to bend the rays of light outwards and the light converge further and reach the retina to form the imagemeaning the lens should form the image at the far point.

b.      The lens formula is,

                       1/f = 1u + 1/v

Here the object distance is infinity,so the reciprocal of infinity gives zero.

   Substitute 0.0  for u   and 0.0 -3.50 m    for   v  

1/f = 1/ -3.50m  + 1/ 0.0

Therefore, the focal length of the contact lenses that the person would need to see an object clearly is -3.50 m

8 0
3 years ago
A balance must exist between substances entering and exiting cells. Most animals take in substances by _____.
Sidana [21]
In-taking new substances and excreting waste
8 0
4 years ago
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How many oxygen atoms are in 6 co2 and 6 h2o
Sliva [168]
There would be 18 oxygen atoms total in CO2 and H2O. 
2 oxygen atoms per CO2, times 6 because there are six CO2 molecules, plus 6 times 1 oxygen atom in H2O. 
3 0
3 years ago
How many gigatonnes of carbon are stored in each of the following locations?
leonid [27]

a)121 million gigatons or 121 million billion metric tons" of carbon).

B)The ocean, with around 38,000 gigatons

c)60 gigatons of carbon

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