Anything less dense than water will float, like oil. Anything more dense than water will sink, like rock.
        
             
        
        
        
Answer:
     λ = 482.05 nm
Explanation:
The diffraction phenomenon and the diffraction grating is described by the expression
          d sin θ = m λ
where d is the distance between two consecutive slits, λ the wavelength and m an integer representing the order of diffraction
in this case they indicate the distance between slits, the angle and the order of diffraction
          λ =  d sin θ / m
d sin θ / m
let's calculate
          λ = 1.00 10⁻⁶ sin 74.6 / 2
          λ = 4.82048 10⁻⁷ m
Let's reduce to nm
          λ = 4.82048 10⁻⁷ m (10⁹ nm / 1 m)
          λ = 482.05 nm
 
        
             
        
        
        
As per the question, the velocity of the airplane [v] = 660 miles per hour.
The total time taken by airplane [t] = 3.5 hours.
We are asked to determine the total distance travelled by the airplane during that period.
The distance covered [ S] by a body is the product of velocity with the time.
Mathematically distance covered = velocity × total time 
                                                       S = v × t
                                                         = 660 miles/hour ×3.5 hours
                                                         = 2310 miles.
Hence, the total distance travelled by the airplane in 3.5 hour is 2310 miles.
 
        
             
        
        
        
Answer:
is b and d hope id helpful
Explanation:
idk how to explain