Answer: Magnetic metals & non-magnetic metals both play an important role in engineering. Magnetism is the basis for many applications. At the same time, this property may also be unwanted in certain circumstances.
Therefore, it is important to know which metals are magnetic and which ones are not.
Explanation:
 
        
             
        
        
        
Answer:
Transferred material is in the same relative position on the disk as on the original sample
Explanation:
The usefulness of blotting techniques in molecular biology is that transferred material is in the same relative position on the disk as on the original sample
 
        
             
        
        
        
Answer:
d = 2021.6 km
Explanation:
We can solve this distance exercise with vectors, the easiest method s to find the components of the position of each plane and then use the Pythagorean theorem to find distance between them
Airplane 1
Height   y₁ = 800m
Angle θ = 25°
            cos 25 = x / r
            sin 25 = z / r
            x₁ = r cos 20
            z₁ = r sin 25
           x₁ = 18 103 cos 25 = 16,314 103 m
= 16314 m
           z₁ = 18 103 sin 25 = 7,607 103 m= 7607 m
2 plane
Height   y₂ = 1100 m
Angle θ = 20°
           x₂ = 20 103 cos 25 = 18.126 103 m = 18126 m
           z₂ = 20 103 without 25 = 8.452 103 m = 8452 m
The distance between the planes using the Pythagorean Theorem is
          d² = (x₂-x₁)² + (y₂-y₁)² + (z₂-z₁)²2
Let's calculate
         d² = (18126-16314)²  + (1100-800)² + (8452-7607)²
         d² = 3,283 106 +9 104 + 7,140 105
         d² = (328.3 + 9 + 71.40) 10⁴
         d = √(408.7 10⁴)
         d = 20,216 10² m
         d = 2021.6 km
 
        
             
        
        
        
The expression of the electric flux is

Here,
Q = Total charge enclosed in the closed surface
 = Permittivity due to free space
 = Permittivity due to free space 
Rearranging to find the charge,

Replacing with our values we have finally

 
 

The charge enclosed by the box is 0.1684nC
The sign of the charge can be decided by using the direction of the flux. The charge enclosed by the cube can be calculated by using the electric flux and the permitivity of free space.