Higher
Electronegativity generally increases from the left of the P.T.(metals) to the right (nonmetals).
Answer:

Explanation:
Given:
- cross sectional area of the wire,

- density of aluminium wire,

- young's modulus of the material,

- wave speed,

<u>We have mathematical expression for strain as:</u>
...............................(1)
and since, 
where, T = tension force in the wire
equation (1) becomes:
............................(2)
<u>Also velocity ofwave in tensed wire:</u>
...................................(3)
where:
linear mass density of the wire

Now, equation (3) becomes

............................(4)
Using eq. (2) & (4) for tension T


putting the respective values


The wavelength of a sound wave is related to its frequency by the relationship:

where
f is the frequency
v is the speed of the wave

is the wavelength
The wave in our problem has wavelength of

and speed of

(this is the speed of sound in air), therefore its frequency is

And the period of the wave is equal to the reciprocal of its frequency:
-- material and thickness of the interconnecting wires;
-- number, type, and configuration of all the devices
between the in- and out-terminals of the circuit ...
the points that connect to the battery;
-- quality of the connections at the points where
circuit devices connect to wires or to each other.
Explanation:
causes hallucinations
causes lung cancer eg cigarettes
causes bad breath
damages the nervous system eg cocaine