CHEMISTRY MIDDLE SCHOOL

The distance traveled divided by time taken to travel the distance is?

Answers

Answer 1
Answer:

Answer:

speed

Explanation:

speed=distance/time

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A hypothesis is a possible explanation or answer to a question. Hypotheses should be testable. Which of the following sentences is the best hypothesis?A. If a person falls asleep, then their heart rate will decrease.B. If a pillbug becomes frightened, then it will roll up into a ball.C. It is better to live in a city than in the country.D. Why are plant leaves green?
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What is a key element found in CO2 and glucose?

Answers

Carbon is the only possible solution in this question for the reason that the chemical formula for glucose is c6h12o6 (6, 12 and 6 underscore) and carbon dioxide is co2. Both of the chemical formula contains carbon that is why that is the main element. 
yes, CARBON  is the correct answer

What is the diffrence between speed and avarege speed

Answers

Speed is actually instantaneous speed, the speed an object is moving at that very instant.
But average speed is the total distance traveled divided by the total time.
Let's say you travelled 10 miles in 2 hours, your average speed would be 10 divided by 2, which is 10 miles / hr.

But during those 10 miles you may be accelerating, decelerating and be travelling 1 mile/hour and 20 miles/hour at another point. But your average speed would be total distance / total time. So your instantaneous speed can change throughout that period of time.
Average speed is the time in wchich you travelled a certain distance averaged out (distande divided by time)
Speed is just how fast an object moves

Why does the density of a substance remain the same for different amounts of the substance?

Answers

Density represents mass per volume and so when homogeneous and incompressible, an amount increase/decrease does not affect density, as the mass and volume change in the same amount. Hope this helps!

Is melting cheese a physical or chemical change it's for science

Answers

In the given question, melting cheese is a type of physical change.

A physical change is defined as a change in the physical properties of a substance, such as its shape, size, or state, without changing its chemical composition.

When cheese is melted, it changes from a solid to a liquid state, but its chemical composition remains the same. The molecules in the cheese are simply rearranged as it is heated, causing it to melt.

Therefore, melting cheese is a physical change. This is because the cheese changes from a solid to a liquid state, but its chemical composition remains the same.

Learn more about physical change here:

brainly.com/question/23918906

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It is a physical change because it is a solid going to a liquid.

Which energy conversion must occur in an operating electrolytic cell?(1) electrical energy to chemical energy
(2) electrical energy to nuclear energy
(3) chemical energy to electrical energy
(4) chemical energy to nuclear energy

Answers

I think the correct answer from the choices listed above is option 1. The energy conversion that must occur in an electrolytic cell is the conversion from electrical energy to chemical energy. The reaction must be forced by applying an external electric current thus needing a supply of electric current.

Answer: 1) electrical energy to chemical energy

Explanation: The reaction must be forced by applying an external electric current thus needing a supply of electric current.

What is biodiversity? I don't really understand...

Answers

Answer:

it is also know as biological diversity

Explanation:

it refers to the varieties or various forms of plants and animals species
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