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2 years ago

What is a constructive force caused by the convection in the mantle

Physics

1 answer:

Katyanochek1 [597]2 years ago

7 0

Explanation:

As the convection current increases, it pushes magma at a divergent boundary between two plates. This forms an undersea mountain range (the Mid-Ocean Ridge) as this magma cools, and further the melting magma welds itself to the plates, creating new crust. Crust is specifically killed in subduction zones at a convergent margin. Nevertheless, the melting of the falling plate triggers the explosion of volcanoes on the underlying surface (such as the Andes produced by the collapse of the Nazca plate below the South American plate), which also creates new material on a terrestrial rock recycling.

Even it may seem that the convergent boundaries are destructive, but they are not actually because they give birth to new material from their own death.

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A car moves uphill at 40 km/h and then back downhill at 60 km/h. What is the average speed for the round trip?

jok3333 [9.3K]

Answer:

$S_a_v_e_r_a_g_e=48km/h$

Explanation:

Ok, the average speed can be calculate with the next equation:

$S_a_v_e_r_a_g_e=\frac{Total\hspace{3}distance}{Total\hspace{3}time}$ (1)

Basically the car cover the same distance "d" two times, but at different speeds, so:

$Total\hspace{3}distance=2*d$

and the total time would be the time t1 required to go from A to B plus the time t2 required to go back from B to A:

$Total\hspace{3}time=t1+t2$

From basic physics we know:

$t=\frac{d}{S1}$

so:

$t1=\frac{d}{S1}$

$t2=\frac{d}{S2}$

Using the previous information in equation (1)

$S_a_v_e_r_a_g_e=\frac{2*d}{\frac{d}{S1} +\frac{d}{S2} }=\frac{2*d}{\frac{d*S2+d*S1}{S1+S2} }$

Factoring:

$S_a_v_e_r_a_g_e=\frac{2*S1*S2}{S1+S2}$ (2)

Finally, replacing the data in (2)

$S_a_v_e_r_a_g_e=\frac{2*40*60}{60+40} =48km/h$

5 0

2 years ago

PLS HELP

RoseWind [281]

Answer:

A and C are correct.

4 0

2 years ago

Read 2 more answers

Integrated Science- 8th grade science

mart [117]

Answer:

"Why"

Explanation: A scientific law is a description of how the natural world behaves under certain circumstances.

7 0

3 years ago

Read 2 more answers

How can you use the position-time graphs for two in-line skaters to determine if and when one in-line skater will pass the other

Jet001 [13]

Explanation:

Position-time graphs measure/express the position of a skater over time relative to the start or finish of the race (depends on how it is used). Note: are the skaters in line vertically or horizontally? Like is one directly behind the other or are they next to each other?

If the two skaters are in line horizontally with each other, then their position will be the same relative to the start or finish of the race. This means if one passes the other one, the position would be different for all times after they pass. On the graph, it would look like one single line at the start (as position is same) which splits into 2 (representing the new difference in position due to 1 passing the other.

If the two skaters are in line vertically, their lines on the graph will appear parallel to each other (assuming they are going same speed) because the position is changing at the same rate, one is just reaching the same point after the other. If the skater behind overtakes the one in front. The lines on the graph will cross and continue either in parallel but with the other line on top to represent the moment where their position is the same right before they pass and after, where the second skater is now in front.

Hope this helped!

8 0

2 years ago

Which way does wind blow,

ruslelena [56]

A. Horizontally - The wind blows parallel to the horizon.

7 0

3 years ago