How can friction be helpful when riding a bicycle and how can it be harmful

Answers

Answer 1

Answer: Friction can be beneficial because it helps stop a bicycle. It could be harmful when their is too much friction because it can burn the wheel.

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Explain the function of ribosomes and why cells need them

Answers

The job of ribosomes is to make protein that is used inside the cell. Your cells use proteins for structural units, as transportation mechanisms between the interior and exterior and as specialized catalysts (enzymes). Therefore, if you don't have ribosomes, the cells wouldn't live because they wouldn't have them to do the functions they need.

Final answer:

Ribosomes are essential cell components that facilitate protein synthesis by translating mRNA into proteins. These proteins play various important roles in cell and organism function and survival, making ribosomes key for growth and survival.

Explanation:

Ribosomes are essential organs within a cell that play a significant role in the protein synthesis process. They are primarily responsible for decoding an organism's DNA into RNA, specifically an mRNA (messenger RNA), which is then used as a template for constructing proteins, a process known as translation.

Proteins produced in ribosomes function in numerous ways, including as enzymes, antibodies, and cell membrane components. Without ribosomes cell would have no way of making these essential proteins.

This is why cells need ribosomes. They are indispensable for the growth and survival of cells and organisms, as they make proteins that are crucial for cell function and growth.

Learn more about Ribosomes here:

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List 4 clues that a chemical reaction is occurring

Answers

Bubbles, color change, light and heat

bubbles, color change, temperature change, excess material rubbing off, and noise, like sizzling

Why does a group of warmer atoms take up more volume than a group of cooler atoms?

Answers

Warmer atoms expand. There is also more movement. This is also explained when putting it into terms with solid vs. gas. In a solid, the atoms vibrate, but they can't move very far because there is not a lot of space between them. In a gas, on the other hand, the atoms are spread apart, and they move very fast. Putting it into context with water, the steam (gas) version is hot, and the ice cube (solid) version is cold. Which one moves more freely? The gas.

What are some facts about ionic bonding?
I need some information for my poster

Answers

- they are always formed by a cation and a anion

- they transfer electrons rather than shared

- all are binary ionic compounds are solids

- they are neutral i.e. no charge

Is Iodine a liquid?If yes then why Bromine is only given as a liquid non-metal?

Answers

You can never say that any substance is a liquid, a solid, or a gas. Every substance you name can be all of those, depending on the TEMPERATURE.

At standard pressure . . .

-- Iodine is solid below 113.7°C, and gas above 184°C .

-- Bromine is solid below -7.2°C, and gas above 58.8°C .

-- "Room temperature" is considered to be the range from 20°C to 23.5°C.

-- Iodine is solid in that range.

-- Bromine one of only two elements that are known to be liquids AT
ROOM TEMPERATURE. The other one is mercury ... a metal.

Drug medication are often prescribed on the basis of body mass. The adult dosage of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 160 lb person.

Answers

Answer:

The dose of Elixophyllin for a person of 160 lb is 436.36 mg.

Explanation:

First you have to go from pounds to kilograms. 160 lb x 1kg/2.2lb = 72.73 kg.

Then you have to multiply the dosage by the body mass in kilograms.

(6 mg/kg) x 72.73 kg ⇒ 436.36 mg.

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What information does a food web reveal that a food chain does not? A. A food web shows the actual number of joules of energy that is transferred from one trophic level to another but a food chain never does. B. A food web shows that most organisms consume and are consumed by more than one organism. C. A food web only shows a single pathway of consumption through the ecosystem. D. A food web consists of biomass pyramids but a food chain does not.

Which contributes to the polarity of a water molecule?B. deflection of hydrogen atoms by lone pairs of electrons C. no difference in the electronegativity of oxygen and hydrogen

The spinning of an object on its axis is called?

Which of the following solutions is more dilute?A.The solution with 10 grams of honey and 100 mL of water.B.The solution with 5 grams of honey and 100 mL of water.C.The solution with 15 grams of honey and 100 mL of water.D.The solution with 20grams of honey and 100 mL of water.