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3 years ago

12

Explain the characteristics of the Gypsum Hills regionIf we have a sample of silicon (Si) atoms that has 14 protons, 14 electron

s, and 18 neutrons
What is the name of this specific silicon isotope?

silicon-14
silicon-32
silicon-46
silicon-153

1 answer:

amid [387]3 years ago

8 0

Answer:

second one

Explanation:

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A bicycle rider travels 50.0 Km in 2.5 hours. What is the cyclist's average speed?

vekshin1

<span>If you divide the numbers you will get on average of 20km</span>

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Explanation:

Given

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4 years ago

What does the person in back of the ambulance experience? A) a lower frequency of the siren B) a lower amplitude of the siren C)

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Which are characteristics of electromagnetic waves?check all that apply.

emmainna [20.7K]

Correct choices are marked in bold:

travel in straight lines and can bounce off surfaces --> TRUE, normally electromagnetic waves travel in straight lines, however they can be reflected by objects, bouncing off their surfaces

travel through space at the speed of light --> TRUE, all electromagnetic waves in space (vacuum) travel at the speed of light, $c=3\cdot 10^8 m/s$ )

travel only through matter --> FALSE; electromagnetic waves can also travel through vacuum

travel only through space --> FALSE, electromagnetic waves can also travel through matter

can bend around objects --> TRUE, this is what happens for instance when diffraction occurs: electromagnetic waves are bended around obstacles or small slits

move by particles bumping into each other --> FALSE, electromagnetic waves are oscillations of electric and magnetic fields, so no particles are involved

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4 years ago

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Please help! thank you

BlackZzzverrR [31]

Answer:

poor, too precise

good

good

good

Explanation:

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3 years ago