Answer:
resistances is inversely proportional to the area of cross section of the conductor
Answer:
a) No, Two vectors with different magnitudes can never add up to zero.
b) Yes, Three or more vectors with different magnitudes can add up to zero.
Explanation:
a) No, Two vectors with different magnitudes can never add up to zero.
Given vector A and B
A = (x1,y1,z1) and B = (x2,y2,z2)
For A + B = 0
This conditions must be satisfied.
x1 + x2 = 0
y1 + y2 = 0
z1 + z2 = 0
Therefore, for those conditions to be meet the magnitude of A must be equal to that of B.
b) Yes, Three or more vectors with different magnitudes can add up to zero.
For example, three forces acting at equilibrium like supporting the weight of a person with two different ropes.
W = T1 + T2
Where;
W = Weight
T1 = tension of wire 1
T2 = tension of wire 2
Answer:
A
Explanation:
going upward, kinetic energy decrease and potential energy increase
Answer:
The value is 
Explanation:
From the question we are told that
The rotational inertia about one end is 
The location of the axis of rotation considered is 
Generally the mass of the portion of the rod from the axis of rotation considered to the end of the rod is 
Generally the length of the rod from the its beginning to the axis of rotation consider is
Generally the mass of the portion of the rod from the its beginning to the axis of rotation consider is
Generally the rotational inertia about the axis of rotation consider for the first portion of the rod is
Generally the rotational inertia about the axis of rotation consider for the second portion of the rod is
=> 
=> 
Generally by the principle of superposition that rotational inertia of the rod at the considered axis of rotation is
=> ![I = \frac{1}{3} ML ^2 [0.6 * (0.6)^2 + 0.4 * (0.4)^2 ]](https://tex.z-dn.net/?f=I%20%3D%20%20%5Cfrac%7B1%7D%7B3%7D%20ML%20%5E2%20%20%5B0.6%20%2A%20%280.6%29%5E2%20%2B%200.4%20%2A%20%280.4%29%5E2%20%5D)
=>
Answer:
We don't get shocked because of the type of materials used in the switch is a poor conductor of electricity
Explanation:
Yes it is quite amazing we don't get shocked, this is because of resistance of the type of materials used in the switch (non conductors of electricity) so that when you try to put on a switch no current passes through you, mostly the material are made from plastics Or ceramics which are actually poor conductors of electricity.
