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3 years ago

Which sentence describes a tropical rainforest ?

Chemistry

1 answer:

kvasek [131]3 years ago

4 0

Answer is: D. it is always wet.

Tropical rainforests are rainforests that occur in areas of tropical rainforest climate, between 10 degrees north and south of the equator.

In tropical rainforest there is no dry season, all months have an average precipitation of at least 60 mm.

Tropical rainforests contain a lot animal species.

They have high levels of biodiversity, around 40% to 75% of all biotic species are in the rainforest.

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An empty plastic bottle is sealed in a cool room and then moved to a very hot room. What can best be stated about the air pressu

mel-nik [20]

<span>A fast moving stream of air has a lower air pressure than a slower air stream. As the stream of air moved over the top of the paper, the air pressure over the paper dropped. The air pressure underneath the paper stayed the same. The greater air pressure underneath lifted the paper strip and it rose. The idea that a moving air stream has lower air pressure than air that is not moving is called “Bernoulli’s Principle”.

</span>The force of the moving air underneath the balloon was enough to hold it up. The weight added by the paper clip prevents the balloon from going too high. But that is only part of the story. The balloon stays inside the moving stream of air because the pressure inside is the air stream is lower than the still air around it. As the balloon moves toward the still air outside of the air stream, the higher pressure of the still air forces the balloon back into the lower pressure of the air stream. Bernoulli’s Principle at work again!

6 0

3 years ago

Read 2 more answers

Express the frequency in inverse seconds. n=5-->n=1

Natalija [7]

The frequencies expressed in inverse seconds are 5 s⁻¹ and 1 s⁻¹.

<h3>What is frequency?</h3>

Frequency is the number of complete cycles in a second made by a wave.

F = 1/T

F = n/t

F = 5/s = 5 s⁻¹ = 5Hz

F = 1/s = 1 s⁻¹ = 1Hz

Learn more about frequency here: brainly.com/question/254161

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4 0

2 years ago

A buffer is prepared by adding 300. 0 ml of 2. 0 mnaoh to 500. 0 ml of 2. 0 mch3cooh. what is the ph of this buffer? ka= 1. 8 10

Anton [14]

The Henderson-Hasselbalch equation can be used to determine the pH of the buffer from the pKa value. The pH of the buffer will be 4.75.

<h3>What is the Henderson-Hasselbalch equation?</h3>

Henderson-Hasselbalch equation is used to determine the value of pH of the buffer with the help of the acid disassociation constant.

Given,

Acid disassociation constant (ka) = 1. 8 10⁻⁵

Concentration of NaOH = 2.0 M

Concentration of CH₃COOH = 2.0 M

pKa value is calculated as,

pKa = -log Ka

pKa = - log (1. 8 x 10⁻⁵)

Substituting the value of pKa in the Henderson-Hasselbalch equation as

pH = - log (1. 8 x 10⁻⁵) + log [2.0] ÷ [2.0]

pH = - log (1. 8 x 10⁻⁵) + log [1]

= 4.745 + 0

= 4.75

Therefore, 4.75 is the pH of the buffer.

Learn more about the Henderson-Hasselbalch equation here:

brainly.com/question/27751586

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6 0

2 years ago

Which property determine am atoms ability to attract electrons shared in a chemical bond?

brilliants [131]

Hello there!

Electronegativity is what determine's an atoms ability to attract electrons shared in a chemical bond.Ionization, atomic radius, and also <span> ionic radius both would not determine this as they wouldn't have any similar bond that would attract.
</span><span>
Your correct answer would be (option c)

</span><span>A. ionization

B. atomic radius

C. electronegativity

D. ionic radius

I hope this helps you!</span>

8 0

4 years ago

Is it fair that some scientists have received more credit than others for their work on the development of the periodic table? W

Gre4nikov [31]

Yes because some work harder than others to get their credit for developing the periodic table

6 0

3 years ago