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NeX [460]
4 years ago
15

The chief function of muscles is _____. contraction absorption excretion protection

Chemistry
2 answers:
Vilka [71]4 years ago
8 0
Contraction the progress in which a muscle becomes or is made shorter and stronger :))))))))))
denpristay [2]4 years ago
3 0

Answer:

The correct answer is the first option: contraction.

Explanation:

Hello!

Let's solve this!

Muscles are structures or tissues with a main function that is to contract. This happens so that we can perform each of our movements.

They are divided into smooth muscles and skeletal muscles.

We conclude that the correct answer is the first option: contraction.

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When communicating with Apollo astronauts, scientists on Earth use radio waves and the "over to you" method of communication. Th
Dominik [7]

The answer is; D

While electromagnetic waves travel at an astounding 3.00 x 10^8 m/s and any delay seems imperceptible in short distances, in long distances, the waves take some time to reach the other end. This is why there is usually a small delay when ground communication tries to reach astronauts in space.  Also, remember that when a communication is relayed from the earth, it has to reach the destination and then wait for a response back to earth which covers the same distance or longer/shorter if the target is moving.

The distance to the moon is 384,400 km, therefore multiply this by 2 = 768,800 km

768,800,000m/300,000,000m = 2. 56 seconds

Therefore radio waves sent to the moon from earth will have a minimum  2.5  seconds delay not considering the processing time of this communication by the destination before sending feedback.  ‘Over to you’ signals end of a message by the messenger hence allowing the other messenger on the other to respond.  


6 0
3 years ago
What is the wavelength in meters of a proton (mass = 1.673 x 10-24 g) that has been accelerated to 5% of the speed of light?
Molodets [167]

Explanation:

since it has been accelerated to 5℅ of the sleec of light then

v= 5/100 × (3× 10^8)

after getting velocity you'll substitute the values in the formula

de Broglie wavelength= h/mv

don't forget to change the grams in mass to kg

aorry I don't hav my calc with me

4 0
3 years ago
Which energy transformation occurs in an electric motor?
Hunter-Best [27]
I think the answer would be A ! Hope this helps
5 0
3 years ago
What happens to the atoms and molecules in a substance as its temperature increases?
lana [24]
The molecules and atoms vibrate faster. As atoms vibrate faster the space between atoms also increases.
5 0
3 years ago
Look at this data and calculate the mean, median, mode, and range.
CaHeK987 [17]

Answer:

the median is 14 the range is 15 the mode is 14 and the mean is 12.7

Explanation:

for the median you put all numbers is order but least to greatest and figure out the middle number for range you take the smallest and the biggest number and subtract them for mode you use the most repeated number and for the mean you add all the numbers and divide by the total of numbers I hope this helped

8 0
3 years ago
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