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2 years ago

How does sound travel ? How does the medium the sound travels through help determine the speed of sound ?

1 answer:

8 0

The speed of a sound wave depends upon the medium through which it travels. In general, sound travels faster through solids than through liquids or gases. Also, the denser the medium, the slower sound will travel through it. The same sound will travel at a different speed on a cold day than it would on a warm day.

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What are good websites to study for biology?

Andru [333]

Khan Academy is great! Also, Alison (it's a website) has some free courses as well.

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3 years ago

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When conducting an experiment, which of the following is generally true?

DENIUS [597]

Answer:

B. Performing a larger number of experimental trials makes the results more dependable.

Explanation:

Every measurement has uncertainty.

If the uncertainties are random, the more measurements you make the more likely you are to mess up.

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3 years ago

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In the above diagram of a plant cell, what is the function of structure 3?

kramer

Explanation:

B. serves as the control center of the cell and contains the cell's genetic information

All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wounucleuscarbohynd around histones as chromosomes. Chromosomes within the nucleus is unwound, unzipped and read by enzymes in a complex series of steps known as transcription. The message on DNA, called genes is copied by RNA polymerase, to form mRNA complementary sequence to that of the DNA strand. These are then translated into proteins in ribosomes.

Further Explanation:

A cell's structural components (i.e. their makeup) determine their function (what they do) . For instance, photosynthesizing cells in algae and plants have structures called chloroplasts. These contain chlorophyll, a specialized compound which facilitates the conversion of light energy to energy stored in carbohydrates. In specific cell types, collected proteins may function as a unit called an organelle. Some organelles are bound by membranes like those that make up the external structure of the cell, with varying compositions of phospholipids and proteins. These are advantageous, as they:

may increase metabolic reaction efficiency; they allow cells to concentrates smaller fractions of enzymes and solutes
separate proteins and molecules that me harm the cell by parceling them into membrane-bound organelles for example, proteaseas bound within lysosomes can break down many structural proteins

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

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3 years ago

What is a major disadvantage to organic farming?

steposvetlana [31]

Answer:

Major disadvantage to organic farming are discussed below.

Explanation:

The major Disadvantages of Organic farming:

Organic food is more costly because growers do not receive as much out of their property as traditional farmers get.
Making charges are more expensive because growers require more extra labor.
Retailing and shipping are not effective because organic food is grown in smaller quantities.

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2 years ago

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V125BC [204]

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His idea went largely unnoticed. But in 1929 astronomer Edwin Hubble discovered that the Universe isn’t static but is in fact expanding. If so, some scientists reasoned that if you rewound the Universe's life then at some point it should have existed as a tiny, dense point. Critics dismissed this: the celebrated astronomer Fred Hoyle sarcastically called this concept the “Big Bang Theory"

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3 years ago

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