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ozzi
3 years ago
15

can someone please help me ill mark brainliest and lots of points please help me someone that likes helping people please help m

ee thank you

Chemistry
2 answers:
ser-zykov [4K]3 years ago
4 0
(1) eyes without magnifying devices
AnnyKZ [126]3 years ago
3 0

Answer:

1) B and 2) D

Explanation:

when scientists refer to the naked eye, it is referring to the eye without any sort of magnifying device, such as a microscope. Algae blooms can result naturally or by human interference

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Triangle ABC is reflected over the x-axis when is the coordinate for C?
Assoli18 [71]
(1,2 because c is already on the other side so you have to reverse it
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3 years ago
Pls help with these question because I don't understand what are pure substance and how to tell ​
Papessa [141]

Answer:

i am pretty sure its A

Explanation:

they are etheir together like black and white or some sort of pattern if notice.

If they are like B,C,D like that they are mixtures which are NOT PURE SUBSTANCE'S.

5 0
2 years ago
Read 2 more answers
A 45 gram piece of metal has a volume of 18cm3. What is the density of this metal?
ruslelena [56]

Answer:

2.5

Explanation:

density = mass/volume

density = 45gram/18cm cubed

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6 0
3 years ago
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9966 [12]

Answer:

The internal energy of a system <u>is the sum of the potential and kinetic energies of the components</u>

Explanation:

Internal energy is defined as the sum of two types of energy: kinetic energy and potential energy.

Kinetic energy is defined as the sum of all the kinetic energies that each element has within a system with respect to its center of mass. It is caused by the movement of particles. Meanwhile, the potential energy is the energy that is associated with each of the interactions. Potential energy is associated with the constituents of matter, of the electrostatic energy of each atom that is inside the molecules.

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HELP!! 50 POINTS! PLEASE ANSWER AND EXPLAIN WHY:
Vikki [24]

Answer:

The correct set of measurement is D

8 0
3 years ago
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