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sladkih [1.3K]
3 years ago
6

In which of the following processes does the molecules become more orderly?A) water freezing B) ice melting C) water evaporating

D) salt dissolving in water E) dry ice subliming
Physics
1 answer:
Sliva [168]3 years ago
5 0

A) Water freezing

This is called the process of turning water as a liquid to its solid form which is ice.

Ice is almost together as one unlike liquid. This is why the molecules are more orderly.

The process of freezing is exothermic which means the heat has to be removed in the process.

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C. because the energy is potential
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A velocity selector is built with a magnetic field of magnitude 5.2 T and an electric field of strength 4.6 × 10 ^ 4 N/C. The di
nydimaria [60]

Explanation :

Magnetic field, B = 5.2 T

Electric field, E=4.6\times 10^4\ N/C

The directions of the two fields are perpendicular to each other. Hence the force due to each field will equate each other.

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Magnetic force, F = qvB........(2)

From equation (1) and (2)

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v=\dfrac{E}{B}

v=\dfrac{4.6\times 10^4\ N/C}{5.2\ T}

v=0.88\times 10^4\ m/s

v=8.8\times 10^3\ m/s

Hence, the correct option is (a).

(2) A permanent magnet always has two poles as the North pole and south pole. The magnetic field lines start from north poles and terminate at the south pole of the magnet.

Hence, the correct option is (C).

5 0
3 years ago
A speeding motorist traveling with velocity Vm is spotted by a police car. The police car is initially at rest, but the instant
Svetlanka [38]

Answer:

Explanation:

Given

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s=0+\frac{a_pt^2}{2}

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from 1 & 2 we get

t=\frac{2v_m}{a_p}

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(b)time taken by police car is

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3 years ago
Akeem is walking on the beach on a hot summer day.
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<u>Answer:</u>

<em>Sand in a beach is warmer than the water of the sea. </em>

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But water is highly reflective and can reflect off a <em>major portion of the sunlight falling on the sea</em>. The sea is also deep and thus the heat spreads through a large volume unlike in the <em>case of sand.</em> Water also has the nature of constant movement unlike sand which is stable.  

<em>This factor also heats up sand more than water. </em>

8 0
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a the average distance from the Sun to Pluto is approximately 6.10 x 1 0 ^9. how long does it take light from the sun to reach P
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8 0
3 years ago
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