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4 years ago

9

The earth mantle is different from the outer core because the mantle is A)farther from the crust.B)Next to the inner core.C)clos

er to the center of the earth.D)closer to the surface of the earth

2 answers:

san4es73 [151]4 years ago

7 0

I believe it would be b

k0ka [10]4 years ago

6 0

answer is D. peeps vote and thanks

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How did kepler descrube the planets orbits

Natalka [10]

Answer:

The planet follows the ellipse in its orbit, meaning that the planet to Sun distance is constantly changing as the planet goes around its orbit. Kepler's Second Law: the imaginary line joining a planet and the sons sweeps equal areas of space during equal time intervals as the planet orbits.

(Brainliest, please?)

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3 years ago

A person whose near-point distance is 45.5 cm wears a pair of glasses that are 2.1 cm from her eyes. With the aid of these glass

scoundrel [369]

Answer:

a

$f = 0.4848 \ m$

b

$p = 2.063 D$

Explanation:

From the question we are told that

The near point distance is $k = 45.5 \ cm$

The distance of the glasses from the eye is $y = 2.1 \ cm$

The distance of an object she can focus with the glass is $i= 25 \ cm$

Generally the image distance is mathematically evaluated as

$v = -(45.5 - 2.1)$

$v = -43.4 \ cm$

Generally the object distance is mathematically represented as

$u = (25 -2.1)$

$u = 22.9 \ cm$

The negative sign tells us that the image was formed behind the eye

Generally the lens formula is mathematically represented as

$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$

=> $\frac{1}{f} = \frac{1}{22.9} + \frac{1}{ - 43.4}$

=> $f = 48.48 \ cm$

converting to meters

$f = 0.4848 \ m$

Thus the refractive power is mathematically represented as

$p = \frac{1}{f}$

=> $p = \frac{1}{0.4848 }$

=> $p = 2.063 D$

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4 years ago

A power transmission line is hung from metal towers with glass insulators having a resistance of 1.00×109 Ω . What current flows

Hunter-Best [27]

Answer:

The current flows through the insulator is 2 mA.

Explanation:

Given that,

Resistance $R=1.00\times10^{9}\ \Omega$

Voltage = 200 kV

We need to calculate the current

Using ohm's law

$V=IR$

$I=\dfrac{V}{R}$

Where, I = current

V = voltage

R = resistance

Put the value into the formula

$I=\dfrac{200\times10^{3}}{1.00\times10^{9}}$

$I=0.0002\ A$

$I=2\ mA$

Hence, The current flows through the insulator is 2 mA.

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4 years ago

The gravitational force between two objects is

Ghella [55]

The complete question is;

The gravitational force between two objects is ______ proportional to the products of the masses and _______ proportional to the square of the distance between them.

Answer:

First dash is directly

Second dash is inversely

Explanation:

From Newton's law of gravitation the gravitational force is given by the equation;

F = GMm/r²

Where:

F is gravitational force

M and m are two masses representing the two objects

r is the distance between them

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Thus, if we are to write it in proportion format, we will have;

F ∝ Mm/r²

From this proportion relationship, we can see that the Gravitational force is directly proportional to the products of the two masses and inversely proportional to the square of the distance between them.

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Explanation:

1. Height Relatives to reference point, Mass, and strength of the gravitational field it's in

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