Answer:
Explanation:
Wave 1,
Wave 2,
Wave 3,
Wave 4,
The general equation of travelling wave is given by :
The value of will remain the same if we take phase difference into account.
For first wave,
For second wave,
For the third wave,
For the fourth wave,
It is clear from above calculations that waves 1 and 3 have same time period. Also, wave 2 and 4 have same time period. Hence, this is the required solution.
Answer: when the dipole moment and electric field are parallel
Explanation: The formulae that relates the potential energy of a dipole, dipole moment and strength of electric field is given as
u = p * E cosθ
Where, u= dipole potential energy, p = dipole moment, E = strength of electric field.
The expression is at maximum when θ = 0 (cos 0° = 1)
Hence the function for potential energy will be greatest when θ = 0° which implies that the dipole moment and strength of electric field are parallel to each other.
Answer:
0.7 N
Explanation:
q1 = 7 micro coulomb
q2 = - 3 micro coulomb
distance = r
Force, F = 3.7 N
Let the new force be F'.
By use of Coulomb's law
.... (1)
Now touch the spheres,
q1 = q2 = (7 - 3 )/ 2 = 2 x 10^-6 C
Now
.... (2)
Dividing equation (2) by equation (1), we get
F' = 0.7 N
Thus, the new force is 0.7 N.
Movement of minerals in plant
Explanation:
In Biology, Active transport means Movement of molecules from lower concentration to Higher concentration through a membranous substance.
It is clearly shown in transportation of minerals from root hairs to root cells.
From root hairs( Lower concentration) minerals are transported to other parts of plant ( Higher concentration, Active transport takes place.
It is clearly evident that in this natural process active transport of minerals takes place effectively through root hairs to various parts of plant.