1. because they have the same numbers of protons and electrons.
2. by the number of its protons and neutrons
3. yes, because the isotopes of an element also have the same number of electrons.
Answer:
<em><u>Basic</u></em><em><u> </u></em><em><u>units</u></em><em><u>=</u></em><em><u>those</u></em><em><u> </u></em><em><u>units</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>measurement</u></em><em><u> </u></em><em><u>which</u></em><em><u> </u></em><em><u>do not</u></em><em><u> </u></em><em><u>depend</u></em><em><u> </u></em><em><u>upon</u></em><em><u> </u></em><em><u>any</u></em><em><u> </u></em><em><u>other</u></em><em><u> </u></em><em><u>units</u></em><em><u> </u></em><em><u>are</u></em><em><u> </u></em><em><u>called</u></em><em><u> </u></em><em><u>basic</u></em><em><u> </u></em><em><u>units</u></em><em><u>.</u></em><em><u> </u></em><em><u>Example</u></em><em><u> </u></em><em><u>length</u></em><em><u>,</u></em><em><u> </u></em><em><u>mass</u></em><em><u>,</u></em><em><u> </u></em><em><u>time</u></em><em><u>,</u></em><em><u> </u></em><em><u>current</u></em><em><u> </u></em><em><u>etc</u></em><em><u>.</u></em><em><u> </u></em>
<em><u>Derived</u></em><em><u> </u></em><em><u>units</u></em><em><u>=</u></em><em><u>those</u></em><em><u> </u></em><em><u>units</u></em><em><u> </u></em><em><u>which</u></em><em><u> </u></em><em><u>are</u></em><em><u> </u></em><em><u>expressed</u></em><em><u> </u></em><em><u>in</u></em><em><u> </u></em><em><u>terms</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>fundamental</u></em><em><u> </u></em><em><u>units</u></em><em><u> </u></em><em><u>are</u></em><em><u> </u></em><em><u>called</u></em><em><u> </u></em><em><u>derived</u></em><em><u> </u></em><em><u>units</u></em><em><u>.</u></em><em><u> </u></em><em><u>Example</u></em><em><u> </u></em><em><u>area</u></em><em><u>,</u></em><em><u> </u></em><em><u>volume</u></em><em><u>,</u></em><em><u> </u></em><em><u>density</u></em><em><u> </u></em><em><u>etc</u></em><em><u>.</u></em><em><u> </u></em>
To solve this problem we can use the concepts related to the change of flow of a fluid within a tube, which is without a rubuleous movement and therefore has a laminar fluid.
It is sometimes called Poiseuille’s law for laminar flow, or simply Poiseuille’s law.
The mathematical equation that expresses this concept is

Where
P = Pressure at each point
r = Radius
Viscosity
l = Length
Of all these variables we have so much that the change in pressure and viscosity remains constant so the ratio between the two flows would be

From the problem two terms are given


Replacing we have to



Therefore the ratio of the flow rate through capillary tubes A and B is 1/32
<span>A magnetic field is produced around a wire when electrical current is in the wire :)</span>
Answer:

Explanation:
given,
Speed of a wave on violin A = 288 m/s
Speed on the G string = 128 m/s
Force at the end of string G = 110 N
Force at the end of string A = 350 N
the ratio of mass per unit length of the strings (A/G). = ?
speed for string A
.......(1)
speed for string G
........(2)
Assuming force is same in both the string
now,
dividing equation (2)/(1)



