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BartSMP [9]
3 years ago
10

The length of a vector arrow represents its magnitude and the point represents its direction

Chemistry
2 answers:
Viefleur [7K]3 years ago
3 0

The answer is: True.

The magnitude of a vector is represented by the length of the arrow.

The arrow length is drawn according a chosen scale.

For example, the diagram shows a vector with a magnitude of 100 kilometers, if the scale used for constructing the diagram is 1 cm = 10 km, the vector arrow is drawn with a length of 10 cm.

The arrow has an obvious tail and arrowhead. The arrow points in the precise direction.

marin [14]3 years ago
3 0

Answer:

True

Explanation:

Scalar quantities have only magnitude whereas vector quantities have both magnitude and direction. Speed is a scalar quality whereas velocity is a vector quantity as velocity has both a magnitude and direction. Vectors are represented by a line with an arrow head. The magnitude of the vector is represented by the length of the line and the arrow head points to the direction of the vector.

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What is the last energy level of N? Mg?
Alexandra [31]

Answer:

2

3

Explanation:

To infer the last energy of the given atoms, we need to write their electronic configuration:

For N = 1S² 2S² 2P³

     Mg  = 1S² 2S² 2P⁶ 3S²  

The energy levels are usually designated as;

   n = 1

   n = 2

   n = 3

   n =4

For N, the last energy level is 2

     Mg, the last energy level is 3

We can also determine this number by the periods the atoms can be found.

3 0
3 years ago
Which is the correct answer??
mestny [16]

Answer:

1

Explanation:

8 0
3 years ago
Physical science!!! please help
IgorLugansk [536]

Answer:

The correct answer is : No, because there are 4 hydrogen atoms on the reactants side and 2 on the products side.

Explanation:

NH_4NO_3\rightarrow N_2O+H_2O

The given reaction equation is not balanced because:

  • Number of hydrogen atoms  on both sides are not equal that is 4 on reactants side and 2 on products side.
  • Number of oxygen atoms on both sides are not equal that is 3 on reactants side and 2 on products side.

In a balanced chemical equation number of atoms of each elements are equal on both sides.

So, the balanced chemical equation will be:

NH_4NO_3\rightarrow N_2O+2H_2O

7 0
3 years ago
Describe the evidence of changes in organisms in the Cambrian Era that are reflected in the fossil record.​
UkoKoshka [18]

Answer:

Morphology and phylogenetics revealed by fossils. Perhaps the strongest evidence to support the Cambrian evolutionary explosion of animal forms is the first clear appearance, in the Early Cambrian, of skeletal fossils representing members of many marine bilaterian animal phyla

Explanation:

also pls vote brainliest <3 :)))

3 0
2 years ago
Please help me with this answer correct
oksano4ka [1.4K]

Answer:

hope this helps :)

Explanation:

for the first one, you can look at the periodic table and look at the atomic number and it will show you how many protons there are giving you the answer because protons and electrons are equal in a pure element

a- carbon

b- neon

c- boron

d- oxygen

e- helium

f- hydrogen

g- lithium

h- beryllium

i- nitrogen

1- sulfur

2- S

3- 16

4- 32.066

5- 16

6- 16

7- 16.066

8- draw circles and put 16 dots like on the other page and in the middle put 16 nuetrons and electrons

9- 6 i think

5 0
2 years ago
Read 2 more answers
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