What happens to matter during chemical changes?

1 answer:

7 0

The object that goes through chemical change, changes completely to where you can not change it back to its original form. Physical change you can undo

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OlgaM077 [116]

Of the materials listed wood is the best insulator. It would be the least hot if exposed to similar temperatures.

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irinina [24]

Because the particles of a solid are not free to move,
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4 years ago

A box of mass 50 kg is pushed hard enough to set it in motion across a flat surface. Then a 99-N pushing force is needed to keep

vitfil [10]

Answer:

0.20

Explanation:

The box is moving at constant velocity, which means that its acceleration is zero; so, the net force acting on the box is zero as well.

There are two forces acting in the horizontal direction:

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The net force must be zero, so we have

$F-F_f = 0$

which we can solve to find the coefficient of kinetic friction:

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3 years ago

The most effective way to process biodiversity is through

lidiya [134]

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How long does it take light to reach us from the Sun, 1.53x108 km away? Give your answer in minutes.

muminat

Answer:

Sun light takes 8.5 minutes to reach Earth.

Explanation:

Light travels in vacuum at constant speed $c= 3 \times 10 ^8 \cfrac ms$ , so we can find the time it takes to travel the given distance from Earth to Sun using a kinematic equation.