CHEMISTRY MIDDLE SCHOOL

If there are many forces acting on an object how can the net force be 0

Answers

Answer 1
Answer: You have to balance out those forces and apply the same amount of equal and opposite force to it. I hope I helped ^^

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The energy for protein synthesis is generated by the _____. A. Golgi body

B. mitochondria

C. rough ER

D. ribosome

Answers

Answer:

b. mitochondria

Explanation:

Most of the ATP produced in the cells, come from the mitochondria, or even in the cytoplasm. In the case of the protein synthesis, since the process starts inside the nucleus of the cell and ends in the cytoplasm, the energy used during the process are obtained mainly from the mitochondria.

The answer is B. mitochondria

How do you calculate the density?

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The way to calculate density is Mass/volume. I hope this helps 

Euglena,amoeba, and paramecium are in what kingdom

Answers

Well, it's because they're eukaryotic, single-celled, mobile.

How does caesium react with oxygen

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Answer:Cesium is a very reactive metal and reacts almost immediately with oxygen in air. It reacts to form Cesium oxide.

4Cs + O² —> 2Cs²O

When an electric kettle containing cold water is switched on, the water in it starts boiling after a few minutes. What is the source of the heat energy of the boiling water? (3 points)a. Mechanical energy from the power socket

b. Newly created energy that increased the total energy

c. Mechanical energy from the heating element in the kettle

d. Already existing energy that was present in some other form

Answers

Answer:

Mechanical energy from the heating element in the kettle

Explanation:

This is because the Element creates Mechanical and heat energy
i say D already existing energy

Fireworks exploding in the sky and giving off light are an example of a(n) _____. a. exothermic change
b. change in mass
c. physical change
d. endothermic change

Answers

Exothermic change. Because the firework when it exploded, released energy in the form of light. In exothermic changes energy is released, and in endothermic changes energy is absorbed.

- This wouldn't be a physical change, but instead a chemical change. A clue that it is a chemical change is that energy was given off.

the answer is A exothermic change
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