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MaRussiya [10]
3 years ago
11

Why couldnt mendeleev organize the entire table during his research

Physics
2 answers:
Makovka662 [10]3 years ago
8 0

Answer:

Some Elements were undiscovered at the time.

Explanation:

NARA [144]3 years ago
6 0
Cause he left out the noble gases out of the periodic table for one good reason, 1: He did not know them
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A 150-N box is being pulled horizontally in a wagon accelerating uniformly at 3.00 m/s2. The box does not move relative to the w
Zepler [3.9K]

Answer:

Frictional force, F = 45.9 N

Explanation:

It is given that,

Weight of the box, W = 150 N

Acceleration, a=3\ m/s^2

The coefficient of static friction between the box and the wagon's surface is 0.6 and the coefficient of kinetic friction is 0.4.  

It is mentioned that the box does not move relative to the wagon. The force of friction is equal to the applied force. Let a is the acceleration. So,

m=\dfrac{W}{g}

m=\dfrac{150}{9.8}

m=15.3\ kg

Frictional force is given by :

F=ma

F=15.3\times 3

F = 45.9 N

So, the friction force on this box is closest to 45.9 N. Hence, this is the required solution.

8 0
3 years ago
Why copper is classified as a metal.
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Answer:

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hope this helped

:)

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