CHEMISTRY MIDDLE SCHOOL

Describe a procedure to separate a mixture of sugar, black pepper, and pebbles.

Answers

Answer 1
Answer:

Answer : The procedure to separate the mixture of sugar, black pepper and pebbles would require physical methods.

First step is to pass the mixture through a grid that traps the pebbles in it and allows the passage of black pepper and sugar from it or alternatively, physically hand-picking up the pebbles can also be done.

Next step is to add water to the mixture to the sugar and black pepper, stir this solution until all the sugar dissolves in the water. Then pass this solution from a filter paper and collect the filtrate in a beaker.

The residue would contain the black pepper on it, it can be dried after separation.

To obtain the sugar which is dissolved in water, one can evaporate the water in it and get the sugar at the bottom of the beaker.
Answer 2
Answer: Pass the mixture through a screen to allow the salt and pepper to pass through but traps the pebbles. Mix the salt and pepper with water to dissolve the salt and filter it to get the pepper.

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Will you Please answer 20!

Answers

Yes because plants are a source of food for some animals

Answer:

yes because the plants is what we need to live they provide us with many things.

Which of the following energy changes occurs as a bow is drawn and released?1. gravitational potential to chemical potential
2. magnetic potential to kinetic
3. elastic potential to kinetic
4. kinetic to thermal

Answers

Answer: The correct answer is 3.

Explanation: As the bow is drawn and released, it will experience a change in elastic potential energy to kinetic energy.

Elastic potential energy is defined as the amount of potential energy which is stored as a result of the deformation of the object which has some elasticity in it. For Example: Stretching of a spring, Drawing of a bow, etc..

Kinetic energy is the energy of the object which is possessed as a result of its motion.

When the bow is drawn, it first had some elastic potential energy and when it is released it had some kinetic energy in it.

Conclusion: The correct answer is 3.
3. elastic potential to kinetic
Mechanical energy is the top suject while it has two types: Kinetic energy which is the energy in motion and potential energy which is the energy in reserve. The measure of both energy in motion and reserve is called Joules. Joules then is the International System of Measurement unit for energy, this is mainly used to account for scaling energy in all aspects. 

suppose you crossed a heterozygous yellow pea plant (Yy) with a homozygous green plant (yy). what are the possible genotypes and phenotypes of the offspring.

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2Yy- for heterozygously yellow
and 2yy- for homozygously green
ratio=50:50

Q: If the average speed of a species of tortoise is 0.36 km/h, what is that speed in cm/s?

Answers

Answer:

36000 centimeters

Explanation:

If the average speed of a species of tortoise is 0.36 km/h, then it would be 36000 centimeters.

How does the law of conservation of energy relate to the processes going on in the water and in the plants?

Answers

Answer: Matter is not destroyed, only changes forms.

Explanation: Take my answer with a grain of salt, I'm not a genius in this type of stuff but, the law of matter states that matter is not destroyed, only changes forms. This can be applied to photosynthesis because the plants take water and use it to make glucose to eat.

Again, I'm not genius so take my answer with a grain of salt but, hope it at least helps a little.

The law of conservation of energy is a fundamental principle in physics that states that energy cannot be created or destroyed in an isolated system; it can only change forms or be transferred from one part of the system to another. This law applies to various natural processes, including those occurring in water and plants. Here's how it relates to these processes:

1. Photosynthesis in Plants:
- Plants undergo photosynthesis, a process in which they convert light energy from the sun into chemical energy stored in the form of glucose (a sugar) and other organic molecules.
- The law of conservation of energy applies here because the energy in sunlight is transformed into chemical energy within the plant. This chemical energy can be stored and later used for various plant functions.
- Photosynthesis also involves the conversion of carbon dioxide and water into glucose and oxygen, but the total energy within the system remains constant, following the law of conservation of energy.

2. Water in the Hydrologic Cycle:
- The hydrologic cycle involves the movement of water between various reservoirs on Earth, including oceans, land, and the atmosphere.
- Water evaporates from the surface (e.g., from oceans, lakes, and rivers) into the atmosphere due to the input of energy, primarily from the sun. This energy causes water molecules to change from a liquid to a gaseous state.
- When the water vapor condenses in the atmosphere, it releases heat energy (latent heat), warming the surrounding air. This energy is then transferred to the surrounding environment.
- Eventually, the condensed water falls back to the surface as precipitation, releasing the stored energy in the form of heat.

In both of these natural processes, the law of conservation of energy is upheld. Energy is transformed and transferred, but the total energy within the system remains constant.

Identify the terms,like terms,coefficients and constants


2+3a+9a

Answers

Like terms :  3a and 9a

Terms: All of them

Coefficients:  3 and 9

Constant : 2
Like terms in algebra are terms that have the same variables and power. Constants contain only numbers, we call them constants because their values don't change. Coefficients are the numbers in front of the variable ex: 5y in that expression 5 is the coefficient. So in the expression 2+3a+9a there is one constant which is 2 the likes terms are 3a and 9a because they have the same variable. And the coefficients are 3 and 9 because they are in front of the variable.
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