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Lady bird [3.3K]
3 years ago
5

Please help!!!! 70 points, i really need this! D:

Physics
2 answers:
jolli1 [7]3 years ago
7 0

1. Frequency 2. measure from trough to trough

Nadusha1986 [10]3 years ago
6 0

Number 1 is frequency

Number 2 is C

Number 3 is D

<h2>I tried my best and i think there right!!</h2>

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21. A 1000-kg automobile moving with a speed of 24 m/s relative to the road collides with a 500-kg automobile initially at rest.
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A truck is moving with less velocity in the direction in which the truck is moving earlier because the truck has more momentum.

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A truck is moving with the velocity of 10 m/s in the same direction in which the truck is moving earlier because the truck has more mass so it has more momentum. Due to collision, the velocity of the truck is slow down but can't be stopped because of high momentum in the truck.

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2 years ago
Beryllium has a charge of 2, and bromine has a charge of –1. which is the best name for the ionic bond that forms between them?
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The best name for the ionic bond that forms between them is Beryllium Bromide.

We have been provided with data,

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As we know the valance electron of Be is +2  and the valance electron of bromine is -1. Since one is metallic and the other is non-metallic.

Now, when they combine they exchange valance electron, and bromine change into bromide so they form Beryllium Bromide.

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8 0
2 years ago
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Explanation:

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3 years ago
When light passes into a more dense material, it bends away from the
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Answer: true

Explanation:

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