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svetoff [14.1K]
2 years ago
15

Most of the Earth’s water is found in the rivers and lakes. t or d

Physics
2 answers:
salantis [7]2 years ago
5 0
False most of earths water is found in oceans .
Temka [501]2 years ago
4 0
False the majority of the water on earth is found in the oceans
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A substance with a definite shape and volume is a<br> phase of matter
lisabon 2012 [21]

Answer:

Explanation:

solid

This type of matter is know as solid. Also, it is known that solid substances have definite shape and volume. Thus, we can conclude that a substance with a definite shape and volume is a solid phase of matter.

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explain why when someone uses his thumb to push a pin into a block of wood the pressure on the wood is greater than the pressure
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the smaller the area the bigger the pressure

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2 years ago
Two long straight wires are parallel and carry current in the same direction. The currents are 8.0 and 12 A and the wires are se
Bess [88]

A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any point is specified by two values, the direction and the magnitude; such that it is a vector field. Mathematically it is described as,

B = \frac{\mu_0 I}{2\pi d}

Here

\mu_0=  Permeability at free space constant

I_{1,2}= Current at each object

d = Distance to the center point of the two object

Two magnetic field due to the current in the same directions then is,

B = \frac{\mu_0 I_1}{2\pi d_1}+\frac{\mu_0 I_2}{2\pi d_2}

Replacing,

B = \frac{(4\pi *10^{-7})(8)}{2\pi (2*10^{-3})}+\frac{(4\pi *10^{-7})(12)}{2\pi (2*10^{-3})}

B = 8*10^{-4} +12*10^{-4}

B = 20*10^{-4}T

Therefore the correct answer is E.

8 0
3 years ago
Four point charges of magnitudes +3q, -q, +2q, and -4q are arranged in the corners of a square of side length L. The charge -q c
mafiozo [28]

Answer:

d) 0 V

Explanation:

It can be showed that the potential due to a point charge q, to a distance d from the charge, can be expressed as follows:

V = \frac{k*q}{r}

where k = \frac{1}{4*\pi*\epsilon0} = 9e9 N*m2/C2

As the potential is an scalar, and is linear with the charge, we can apply the superposition principle, which means that we can find the potential due to one of the charges, as if the other were not present.

By symmetry, all four charges are at the same distance from the center, so we can write the total potential, as follows:

V = \frac{k}{d} ( q1 + q2 + q3 + q4) (1)

where d, is the semi-diagonal of the square, that we can find applying Pythagorean theorem, as follows:

d = \sqrt{\frac{L^{2}}{4} + \frac{L^{2}}{4} } = L*\frac{\sqrt{2}}{2}

Replacing by the values in (1) we have:

V = \frac{9e9N*m2/C2}{\frac{L}{2}*\sqrt{2} }* ( +3q -q + 2q + -4q)  = 0 V

which is equal to the option d).

6 0
3 years ago
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