Answer:
Explanation:
Impulse of a force is measured by force x time or F X t 
Impulse also equals change in momentum or 
F x t = m v₂ - m v₁
The given case is as follows 
in the first case 
F x t = mv - o = mv 
F = mv / t
in the second case
F₁ x 4 t = mv 
F₁ = 1/4 x mv /t 
F₁ = F / 4 
option a) is correct .
iii )
In the last case 
F₂ X t = m v/2 -0
F₂ = 1/2 x mv / t 
= 1/2 x F 
F₂ = F/2 
Option e ) is correct. 
 
        
             
        
        
        
A magnet contains billions of aligned atoms known as magnetic domains
        
                    
             
        
        
        
2 because that’s correct I I I I I I I I I I I I I I I I I I I
        
             
        
        
        
Answer:
a = 2d / t²
Explanation:
d = ½ at²
Multiply both sides by 2:
2d = at²
Divide both sides by t²:
a = 2d / t²
 
        
             
        
        
        
Answer:
D) 763 nm
Explanation:
Calculation for the wavelength of light
 
Using this formula
Wavelength of light=Delta Y*Distance / Length
Where,
Delta Y represent the 2nd order bright fringe
Length represent the distance between both the slits and the screen
Distance represent the Distance between the slits
Let note that cm to m = (4.2) x 10^-2 and mm to m= ( 0.0400x 10^-3)
Now Let plug in the formula
Wavelength of light=[(4.2 x 10^-2m)(0.0400 x 10^-3m) / 2(1.1m)]*10^-7 meters
Wavelength of light=[(0.042m) (0.0004m)/2.2m]*10^-7 meters
Wavelength of light =(0.0000168m/2.2m)*10^-7 meters
Wavelength of light =7.63 *10^-7 meters
Wavelength of light =763 nm
Therefore the Wavelength of light will be 763 nm