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Inga [223]
3 years ago
11

A ball rolls 12 meters in 4 seconds.What is the average speed of the ball?

Chemistry
1 answer:
Degger [83]3 years ago
7 0

Answer:

3 meters/second

Explanation:

Speed is roughly defined as distance travelled over a unit of time. So we can calculate the speed of the ball using the formula:

s=\dfrac{d}{t}

where:

s = speed

d = distance

t = time

Given:

d=12 meters

t = 4 seconds

So we plug that in our equation:

s=\dfrac{d}{t}

s=\dfrac{12meters}{4seconds}

s=3\dfrac{meters}{second}

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Explanation:

A volcano is a land form which results from the eruption of molten rocks (lava) on the surface. Volcanic rocks are a special type of igneous rock that forms when molten rock cools and solidifies on the surface.

For a planet like Venus which is presently not active and little to no movement occurs within the plates, the volcanisim must have occurred when the planet was relatively young and it must have been millions of years ago.

It is widely believed that Venus was geologically active in times past. Mantle generated lava must have solidified on the surface in times past to have formed the volcano.

Evaluating other options:

Impact of space objects on Venus would lead to the formation of a crater which is a depression on the surface. The rock would be mostly metamorphic.

If water was ever present in Venus, they would have produced sedimentary rocks instead. The erosive power of water is not high enough to cut through the crust. Also, water would not aid the formation of volcanoes.

Heat is not enough to from volcanoes. Other factors are also in play.

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2 years ago
Which is the most likely to be reduced?
NISA [10]

Answer : The correct option is, Zn^{2+}

Explanation :

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Or we can say that, oxidation reaction occurs when a reactant losses electrons in the reaction.

  • Reduction reaction : It is defined as the reaction in which a substance gains electrons. That means, the gain of electrons takes place.

Or we can say that, reduction reaction occurs when a reactant gains electrons in the reaction.

According to the electrochemical series, Zn^{2+} most likely to be reduced because

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Answer:

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Explanation:

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