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3 years ago

9

Cuantos elementos han descubierto los humanos

1 answer:

marishachu [46]3 years ago

4 0

ANSWER: How many elements the brothers have discovered

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Tectonic plates move due to _____ forces.

wel

<span>Tectonic plates move because they are floating on top of the liquid mantle. The mantle itself moves due to convection currents: hot rock rises, gives off some heat, then falls. This creates vast swirls of moving liquid rock under the crust of the earth, which jostles the plates of crust on top.
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6 0

3 years ago

Read 2 more answers

Ocean waves pass through two small openings, 20.0 m apart, in a breakwater. You're in a boat 70.0 m from the breakwater and init

Klio2033 [76]

Answer:

λ = 5.65m

Explanation:

The Path Difference Condition is given as:

δ= $(m+\frac{1}{2})\frac{lamda}{n}$ ;

where lamda is represent by the symbol (λ) and is the wavelength we are meant to calculate.

m = no of openings which is 2

∴δ= $\frac{3*lamda}{2}$

n is the index of refraction of the medium in which the wave is traveling

To find δ we have;

δ= $\sqrt{70^2+(33+\frac{20}{2})^2 }-\sqrt{70^2+(33-\frac{20}{2})^2 }$

δ= $\sqrt{4900+(\frac{66+20}{2})^2}-\sqrt{4900+(\frac{66-20}{2})^2}$

δ= $\sqrt{4900+(\frac{86}{2})^2 }-\sqrt{4900+(\frac{46}{2})^2 }$

δ= $\sqrt{4900+43^2}-\sqrt{4900+23^2}$

δ= $\sqrt{4900+1849}-\sqrt{4900+529}$

δ= $\sqrt{6749}-\sqrt{5429}$

δ= 82.15 -73.68

δ= 8.47

Again remember; to calculate the wavelength of the ocean waves; we have:

δ= $\frac{3*lamda}{2}$

δ= 8.47

8.47 = $\frac{3*lamda}{2}$

λ = $\frac{8.47*2}{3}$

λ = 5.65m

3 0

4 years ago

Jack bought 8 boxes of soda. how many cans did he buy if each box holds 34 cans?

Alenkasestr [34]

Answer:

272

Explanation:

hope this helps you!!!

4 0

4 years ago

Planets that are cold have only a small amount of gravity

Nonamiya [84]

There is no theoretical OR observational evidence for that statement.

4 0

4 years ago

Two point charges q and 4q are at x=0 and x=l, respectively, and free to move. a third charge is placed so that the entire three

tatuchka [14]

Explanation :

It is given that, q and 4q are placed at a distance of l.

Let x is the distance where third charge is placed so that the entire three charge system is in static equilibrium.

Equilibrium means the net force acting on the system of charges is equal to zero. Let Q is the third charge.

So, $\dfrac{kqQ}{x^2}=\dfrac{k(Q)(4q)}{(l-x)^2}$

On solving,

$x=\dfrac{l}{3}$

For magnitude :

$\dfrac{kqQ}{(l/3)^2}=\dfrac{kq4q}{l^2}$

using $x=\dfrac{l}{3}$

$Q=\dfrac{4q}{9}$

So, a charge of -4q/9 is at a distance of l/3 is placed. It is placed to the right of +q.

8 0

4 years ago