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3 years ago

14

The outer shell electrons in metals are not tightly bound to the nuclei of their atoms they are free to roam throughout the mate

rial moving from atom to atom these materials are good

1 answer:

Yuliya22 [10]3 years ago

6 0

The pumps which supplies energy to move the water from the ground to a high elevation. The charges that flow throughout the wires.

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A rock has a mass of 8.0 kilograms falls 5 meters.

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A. 392J

B. 392J

C. 9.899m/s

Explanation:

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3 years ago

A bicycle rider travels 50.0 km in 2.5 hours. What is his average speed?

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50km / 2.5 = 20 km per hour

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3 years ago

A child on a swing falls a height of 1m. What speed will the child reach?

kirill [66]

Answer: $v=4.42\ m/s$

Explanation:

Given

Child falls a height of $h=1\ m$

Applying conservation of energy we can write

Loss in Potential energy=Gain in kinetic energy

$mgh=\frac{1}{2}mv^2$

$v=\sqrt{2gh}$

$v=\sqrt{2\times 9.8\times 1}$

$v=\sqrt{19.6}$

$v=4.42\ m/s$

Thus child reaches a velocity of 4.42 m/s

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3 years ago

Electromagnetic waves are ____________ (one thousand/one million) times faster than sound.

vesna_86 [32]

Answer:

one million

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3 years ago

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