In order to find the angle of the refracted ray, we may use the Snell's law (also known as Snell–Descartes law and the law of refraction). This law states that the ratio of the sines of the angles of incidence and refraction is constant for a given wave when it passes through two different media such as water, glass, or air.
 In mathematical form, this is:
n₁sin(∅₁) = n₂sin(∅₂)
Where:n is the refractive index.
Plugging in the values given into the equation:
1.0003 * sin(20°) = 1.33 * sin(∅)
∅ = 14.91
The angle of refraction is 15°.
        
             
        
        
        
 The forces of friction acting on the object are <u>12.67 N.</u>
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Friction is the force resisting the relative motion of sturdy surfaces, fluid layers, and material factors sliding towards each specific. There are numerous styles of friction. Dry friction is a strain that opposes the relative lateral movement of two stable surfaces in touch. 
<u>Calculation:-</u>
ma - 14.2 N = Friction force
14.2 N - 0.45 × 3.41 = <u>12.67 N</u>
Friction is the shape of contact pressure. It exists between the surfaces that are in touch. The frictional force relies upon the character of the floor in contact. The rougher the ground, the extra friction is involved. The frictional force is proportional to the urgent pressure, which is the burden of the body. it's miles impartial of the place of the touch.
Learn more about friction here:-brainly.com/question/24338873
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Answer:
Force will be 
Explanation:
We have given side of wire d = 2.3 cm = 0.023 m 
Magnetic field B = 1.5 T
Velocity v = 2.1 m/sec
Resistance R = 3 ohm 
We know that current is given by 
Power is given by 
We know that power is also given by 
So 

 
        
             
        
        
        
Answer:
 electrons
  electrons
Explanation:
The total charge Q is the sum of the charge of the N electrons contained in the sphere:

 charge of a electron
    charge of a electron 
We solve to find N:

 
        
             
        
        
        
It supports 128 primary partitions.