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sp2606 [1]
3 years ago
6

The first periodic table of elements Mendeleev created contained how many elements

Physics
1 answer:
Mila [183]3 years ago
6 0
Mendeleev created a periodic table with 63 initial elements.
He left gaps for unknown elements.
To this date, there are 118 elements in the periodic table.
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When a person speaks, a sound intensity is generated that is 600 times greater than when the person whispers. What is the differ
Charra [1.4K]

Answer:

Originally :  Level = log I / I0

Currently: Level = 10 log I / I0

Level = 10 log 600 = 10 * 2.78 = 27.8

Note the term 1 bel = 10 decibels

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2 years ago
The crust is composed primarily of basalt and _____________.
german

Answer:

Granite

Explanation:

Trust me I learned this 2years ago

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2 years ago
All galaxies follow the law of gravity. True or False
Juliette [100K]

The answer is true. All the galaxies in the universe follow the law of gravity.

<span>Based from the book, It's about Time: the Illusion of Einstein’s Time Dilation Explained, </span>

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8 0
2 years ago
A 6 kg box with initial speed 5 m/s slides across the floor and comes to a stop after 1.9 s. What is the coefficient of kinetic
Ilia_Sergeevich [38]

Answer:

\mu_k=0.27

Explanation:

According to the free body diagram, in this case, we have:

\sum F_x:-F_k=ma\\\sum F_y:N=mg

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F_k=\mu_k N

Replacing and solving for the coefficient of kinetic friction:

-\mu_kN=ma\\-\mu_k(mg)=ma\\\mu_k=-\frac{a}{g}

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\mu_k=-\frac{-2.63\frac{m}{s^2}}{9.8\frac{m}{s^2}}\\\mu_k=0.27

4 0
3 years ago
Which theory of the origin of the moon would be most supported if the moon had an irregular shape, like an asteroid? impact theo
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3 0
3 years ago
Read 2 more answers
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