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4 years ago

How do we know the outer layer of the core is molten

Advanced Placement (AP)

1 answer:

Tomtit [17]4 years ago

5 0

But it may surprise you to learn that, in between the solid inner core and the solid mantle, lies a liquid layer more than 2,000 kilometers thick: the Earth's outer core... The way we know that the outer core is liquid is quite brilliant: from the seismic waves produced from earthquakes.

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Question 70

irakobra [83]

I’m gonna say E. Schizophrenia

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4 years ago

an experiment designed so that you can observe the differences between the experimental group and the ____?

makvit [3.9K]

An experiment designed so that you can observe the differences between the experimental group and the control group.
In each experiment there have to be two groups - an experimental one (which has a different variable), and a control group. Both of these groups are subjected to the same thing except for that variable you are trying to test via an experiment.

3 0

3 years ago

(a) Use the climatograph above to identify the following.

Alex73 [517]

Answer:

(i) Identify the month with the least amount of rainfall in this temperate grassland.

The month with the least amount of rainfall is January, when only around 20 mm of rain fall in the month. In the climatograph, rainfall is represented by the bars, while temperature is represented by the line.

(ii) Identify the maximum mean monthly temperature in this temperate grassland.

The maximum mean monthly temperature occurs at the end of June and the start of July. The mean monthly temperature reaches over 25 degrees centigrades over this time period.

(iii) A climatograph for a tropical grassland or savanna would look different from the climatograph shown for a temperate grassland. Describe one difference in the patterns or trends in the temperature data in a tropical grassland compared to those of a temperate grassland.

The climatograph for the tropical grassland would show similar patterns for rainfall, but higher mean monthly temperatures. Tropical grasslands are generally almost as dry as temperate grasslands, but they are much warmer over the year (lacking a proper winter for example).

3 0

3 years ago

Hello, I need help with a calculus FRQ. My teacher has given a hint that this last part has to do with the intermediate value th

lesya [120]

Answer:

Yes, at a time t such that (√2)/2 ≤ t ≤ 2.

Explanation:

To answer the question

Therefore, where the domain of the function is the set of all real numbers x for which f(x) is a real number we have

For Chloe's velocity

$C(t) = t\times e^{4-t^2} \ for \ 0\leq t\leq 2$

Finding the boundaries of the function gives;

$0\times e^{4-0^2} = 0$ and $2\times e^{4-2^2} = 2$

At t = 1, we have $1\times e^{4-1^2} = e^{3} = 20.086$

We find the maximum point as follows;

$\frac{\mathrm{d} \left (t\times e^{4-t^2} \right )}{\mathrm{d} x}=0$

From which we have;

$\frac{\mathrm{} e^{4-t^2} - t\times e^{4-t^2} \times2\times t }{(e^{4-t^2} )^2}=0$

$e^{4-t^2} - t\times e^{4-t^2} \times2\times t }=0$

$e^{4-t^2}(1 - t\times2\times t })=0\\e^{4-t^2}(1 - 2\times t^2 })=0\\$

$e^{4-t^2}=0$ or $(1 - 2\times t^2 })=0$

∴ 1 = 2·t² and from which t = (√2)/2

Hence the function C(x) is decreasing from t = (√2)/2 to t = 2

For Brandon

For 0 ≤ t ≤ 1, 1 ≤ B(t) ≤8 and for 1 < t ≤ 2, 8 < B(t) ≤ 1.5

1 ≤ f(x) ≤ 1.5

Given that the function B(t) is differentiable, therefore, continuous, there exists a point at which the function C(t) and B(t) intersects given that;

For 0 ≤ t ≤ (√2)/2, 0 ≤ C(t) ≤ 23.416 for (√2)/2 < t ≤ 2, 23.416 > C(t) ≥ 2

and for 0 ≤ t ≤ 0 1 ≤ B(t) ≤ 8 and for 1 < t ≤ 2, 8 > B(t) ≥ 1.5

Therefore, the curves intersect at in between (√2)/2 ≤ t ≤ 2.

8 0

3 years ago

HUMAN IMPACTS ON BIODIVERSITY 5. _________________________ 1

sergiy2304 [10]

Answer:

Yes people affect biodiversity

Explanation:

people affect biodiversity by one their population, two use of land, and three their lifestyles, causing damage to habitats and or species. It is important for people to realize how their actions affect biodiversity and the importance of maintaining what biodiversity is left on the earth.

5 0

4 years ago