Answer:
Three long wires are connected to a meter stick and hang down freely. Wire 1 hangs from the 50-cm mark at the center of the meter stick and carries 1.50 A of current upward. Wire 2 hangs from the 70-cm mark and carries 4.00 A of current downward. Wire 3 is to be attached to the meterstick and to carry a specific current, and we want to attach it at a location that results ineach wire experiencing no net force.
(a) Determine the position of wire 3.
b) Determine the magnitude and direction of current in wire 3
Explanation:
a) 
position of wire = 50 - 1.2
= 48.8cm
b) 
Direction ⇒ downward
Answer:
Explanation:
let the ladder is of mass "m" and standing at an angle with the ground
So here by horizontal force balance we will have
by vertical force balance we have
now by torque balance about contact point on ground we will have
so we will have
now from first equation we have
It is a seismograph that would be most useful.
Explanation: The atoms attain the configuration of inert gas by sharing electrons.
Lets take an example of HCl,
Atomic number of H is 1 and it has only 1 valance electron. whereas atomic number of chlorine is 17 and it has 7 valance electron.
When hydrogen atom combine with chlorine atom then they share electrons through covalent bonding in order to complete their octet.
According to figure,
Electronic configuration of H = 1
Electronic configuration of Cl = 2,8,7
Now, after share of electron
Electronic configuration of H = 2
Electronic configuration of Cl = 2,8,8
Hence, we can conclude that when atoms share electrons then their octet gets complete and atoms achieve noble gas electronic configuration.
Answer:
No matter how parts of an object are assembled, the weight of the whole object is always the same as the sum of the parts; and when a thing is broken into parts, the parts have the same total weight as the original thing.
