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Contact [7]
3 years ago
14

In 1869 Dmitri Mendeleev was trying to arrange the 65 known elements in a logical way. He arrived at the solution when he saw th

e elements arranged by atomic weight in a dream . He tried this arrangement and it worked. What is this an example of?
Physics
1 answer:
stellarik [79]3 years ago
8 0

Answer: Creative thinking

Explanation:

It should be noted that, Creative Thinking is the method by which a problem is solved with the help of thinking skills.

The thought that is present in mind is tries in the practical life so that the problem can be solved.

Going by the question asked, Mandleev was trying to arrange elements in a logical way. He thought of arranging the elements based on the atomic weight.

This gives a good oexample of creative thinking in which the thinking is applied and a logical result is product of the thinking.

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Red Riding Hood sat down to rest and placed her 1.20-kg basket of goodies beside her. A wolf came along, spotted the basket, and
anygoal [31]

Answer:

  117.6°

Explanation:

The vertical component of a force directed at some angle α from the vertical is ...

  F·cos(α)

We want the vertical components of the wolf's force (Fw) and Red's force (Fr) to total zero. So for some angle from vertical α, Red's force will satisfy ...

  Fw·cos(25°) + Fr·cos(α) = 0

  cos(α) = -Fw/Fr·cos(25°) ≈ -(6.4 N)/(12.5 N)·0.906308 ≈ -0.464030

  α ≈ arccos(-0.464030) ≈ 117.6°

Red was pulling at an angle of about 117.6° from the vertical.

_____

<em>Additional comment</em>

That's about 27.6° below the horizontal.

3 0
3 years ago
A cell of internal resistance 2 ohms supplies current to a 6 ohms resistor. What is the efficiency of the cell?. ​
Margaret [11]

75% is the efficiency of the cell.

Explanation:

Internal resistance is the resistance generated due to the devices present in the circuit. Most preferably, it is the resistance of the battery connected to the circuit.

As the current, resistance of the resistor and the internal resistance of the battery is given as 6 A, 6 ohms and 2 ohms.

Then the efficiency of the cell is E = \frac{IR}{I (R+r)} =\frac{R}{r+R}

So, the efficiency of the cell is E=\frac{R}{r+R}

Then, E = \frac{6}{2+6}=\frac{6}{8}

So, the efficiency is 75%.

75% is the efficiency of the cell.

4 0
3 years ago
The wavelength of a waterwave is 4.0 X 10^2 m. The wave approaches land at 25 m/s what is the period of the wave?
Elodia [21]
The right answer is 72
3 0
3 years ago
Anatomy &amp; physiology <br> Helllp please!!!!
Liula [17]

Answer: It's the third one.

Explanation:

5 0
3 years ago
Now assume that the boat is subject to a drag force fd due to water resistance. is the component of the total momentum of the sy
DochEvi [55]
Based on the given details with this question, I can say that the direction of motion is not conserved. This is because the boat is subjected to an external force because of water resistance. So, the answer for this question would be NO.
4 0
3 years ago
Read 2 more answers
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