. Karst topography is a landscape formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves.
D. Giant kangaroo rats enrich the soil for plants with their piles of grass clippings in the California grasslands.
Explanation:
Giant kangaroo rats enriching the soil for plants with their piles of grass clippings in the California grasslands is an example of how biodiversity contributes to the sustainability of natural environment.
- Biodiversity refers to the variety of life forms in an area.
- The more diverse an ecosystem is, the more sustainable it is.
- Decaying plant pilings cut by the Kangaroos when they decay release useful nutrients to the soil.
- This would not be possible if an animal like the Kangaroo rats are not present.
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The ratio between initial and final speed is 3:4
Explanation:
The speed of a wave is given by the wave equation:
where
v is the speed
f is the frequency of the wave
is the wavelength
In this problem, we have a wave with wavelength and initial frequency
So its speed can be written as
Later, its frequency changes to
Assuming that its wavelength has not changed, this means that its new speed is
By calculating the ratio between the two,
So, the ratio between initial and final speed is 3:4.
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Answer:
what are the options for me
Force applied = F = 628 N
<span>Acceleration = a m/s² </span>
<span>Newton's 2nd law of motion : F = Ma </span>
<span> a = F/M -------- (1) </span>
<span>New mass of the crate = M1 = 3.8M kg </span>
<span>New acceleration = a1 = F/M1 = F/(3.8 M) ----- (2) </span>
<span>a1/a = {F/(3.8M)}/(F/M) = 1/3.8 = 10/38 = 5/19 ------- Answer</span>