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2 years ago

Why do people feel fireworks before hearing it?

Biology

1 answer:

mars1129 [50]2 years ago

4 0

Answer:

People feel fireworks before hearing it because light travels faster than sound.

Explanation:

We always see the colors of the fireworks before hearing their defeaning sounds. This is because light travels faster than sound, so we can see the light before hearing the sound. An example of this is seeing lightning before hearing thunder. When lightning strikes, the air around it moves very quickly, causing vibrations.

Hope this helps!

xoxo,

cafeology

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Describe 3 values that the biosphere provides

inysia [295]

the first value that biosphere provides is genetics which provides variety of genes in population. the second value that biosphere provides is species which is an abundance of each species in a biological community. the last value the biosphere provides is the ecosystem with variety of ecosystems that are present in the biosphere.

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3 years ago

A 22-year-old man was in a motorcycle accident with resultant neck injuries that led to partial paralysis of the upper and lower

Arte-miy333 [17]

Answer:

We are given:

Minute Ventilation, MV = 6L/min

Respiratory Rate, RR = 30 b/min

PaO2 = 61mmHg

PaCO2 = 47mmHg

a) to find Tidal Volume, TV, we use:

TV = MV/RR

TV = 6/30

= 0.2litres => 200ml

For Alveolar ventilation, AV, we have:

AV = (Tidal Volume-dead space)×RR

AV = (200 - 150)×30

AV = 1500ml/min

The normal dead space value is 150ml.

Comparing both TV and AV with the normal values, it can be said that, since he has a TV of 200ml, he is defficient because a normal TV level is 500ml.

The man has an AV of 1500ml/min, which is low when compared to the normal AV value which is 4200ml/min.

2) The factor contributing to the deceased alveolar ventilation is the increase in PaCO2, in this case, the PaCO2 is 47mmHg, whereas the normal PaCO2 level is between 38-42mmHg

3) The muscle involved in this problem is the lower rib cage and thoracic cavity, while the nerve involved in this problem is the spinal cord.

4) The residual volume is decreased

5) Dyspenea simply means shortness of breath. It happens when a person experiences difficulty in breathing.

6) The cause of Dyspenea could be that the tidal Volume is lowered by the reduced diaphragmatic and intercoastal innervation or it could also be caused by chest trauma

7) The reflexes that causes tachypnea in this individual are the central and peripheral chemoreceptors. A individual has a PaO2 of 61mmHg and this low PaO2 causes the high breathing rate becauses peripheral chemoreceptors senses it and the medulla sends the signal out

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3 years ago

In your own words, write the definition of each of the words below. Theory:

wlad13 [49]

Answer:

Theory: A theory is a carefully thought-out explanation for observations of the natural world that has been constructed using the scientific method, and which brings together many facts and hypotheses.

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2 years ago

At the center, 8 unmarked red balls are interspersed with 6 blue balls marked with plus signs. A green cloud with 2 concentric w

gogolik [260]

Answer: 1. 6

2. 8

3. 6

Explanation:

got it right on Edgenuity

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3 years ago

Read 2 more answers

During childbirth, a woman will experience muscle contractions in her uterus in response to pressure generated by the fetus. As

lesya692 [45]

Answer:

here

Explanation:

In a negative feedback loop, an increase in a factor will result in a change in the body that'll reduce the value of this factor to the set point.

For example, an increase in the blood glucose levels after a meal will cause an increase in the levels of insulin in the blood which will lower the glucose levels.

However, in this example, an increase in the pressure generated by the fetus also increases the frequency of uterus contractions. So the more the pressure, the more the contractions.

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3 years ago