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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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An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. The maximum speed of the o
Sliva [168]

Answer:

t = 0.37 seconds

Explanation:

t = (1/4)T

Maximum acceleration is;

a_max = Aω²

In simple harmonic motion, we know that v_max = Aω

Thus, a_max = v_max•ω

ω = a_max/v_max

We know that Period is given by;

T = 2π/ω

From initially, t = (1/4)T so, T = 4t

Thus, 4t = 2π/(a_max/v_max)

t = (2π/4)(v_max/a_max)

We are given;

Maximum velocity;v_max = 1.47 m/s

Max acceleration;a_max =6.24 m/s²

Thus,

t = (2π/4)(1.47/6.24)

t = 0.37 seconds

8 0
3 years ago
Which three metal do you think might be present in alnico explain ? ans which one are magnetic​
erma4kov [3.2K]

Answer:

Aluminium, Nickel, Cobalt and Iron plus varying levels of Copper, Titanium and Niobium.

MAGNETIC: Alni, Alcomax, Hycomax, Columax, and Ticonal.

8 0
3 years ago
Describe the law of conservation of energy. Provide at least one example that illustrates this law. (4 points)
SCORPION-xisa [38]
The law of conservation of energy states that energy is neither created nor destroyed; the amount remains constant. For example, a form of energy-thermal energy, or heat, occurs by convection or conduction
6 0
4 years ago
List three reasons why knowing how to graph movement can help you on a practical level.
valina [46]

<span>-1.0 m/s2
1.0 m/s2
-5.0 m/s2
5.0 m/s2
0.24 m/s<span>2</span></span>
6 0
3 years ago
how is electrostatic force related to the magnitude of charge on the two objects? keeping the same separation distance for all t
wel
Electronic force related to magnitude by magnets. It is a magnetic force. So basically there is a big magnet in the center of earth. Keeps same energy. Right on edg
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3 years ago
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