Answer: Angle 59 degree 
Explanation: Given that the 
n1 = 1.0 
n2 = 1.5
Øi = 35 degree 
From Snell law, which says that 
n1/n2 = sinØ1/ sinØ2
Substitute all the parameters into the formula 
1/1.5 = sin 35/sinØ2
Cross multiply 
Sin Ø2 = 1.5 sin35
SinØ2 = 1.5 × 0.573 = 0.860
Ø2 = sin^-1(0.860)
Ø2 = 59.36 degree 
Ø2 = 59 degree ( approximately)
It has angle 59 degree when passing from air to glass 
 
        
             
        
        
        
Answer:
 A). 1.9 cm 
Explanation:
m = Mass of brick = 12 kg
g = Acceleration due to gravity = 9.81 m/s²
r = Radius of hose
A = Area = 
F = Force = 
Let us assume that the pressure required to lift the brick would be atmospheric pressure

The radius of the hose should be 1.9 cm
 
        
             
        
        
        
Answer:
no
Explanation:
they cannot because they contain the same amount of liquid
  
        
                    
             
        
        
        
Answer:
(a) A = 
(b) 
(c) 
(d) 
Solution:
As per the question:
Radius of atom, r = 1.95  
 
Now, 
(a) For a simple cubic lattice, lattice constant A:
A = 2r
A = 
(b) For body centered cubic lattice:


(c) For face centered cubic lattice:


(d) For diamond lattice:

