Answer:
a numerical or constant quantity placed before and multiplying the variable in an algebraic expression example ( 4 in 4x y).
Explanation:
Hope this helps! Brainly if so!
 
        
                    
             
        
        
        
Answer:
a) 0.3 m
b) r = 0.45 m
Explanation:
given,
q₁ = 0.44 n C   and q₂ = 11.0 n C
 assume the distance be r from q₁  where the electric field is zero.
distance of point from q₂  be equal to 1.8 -r
now,
         E₁ = E₂



1.8 = 6 r
r = 0.3 m
<h3>b) zero when one charge is negative.</h3>
let us assume  q₁  be negative so, distance from  q₁ be r
from charge q₂ the distance of the point be 1.8 +r
now,
    E₁ = E₂



1.8 =4 r
r = 0.45 m
 
        
             
        
        
        
It will take at least 3 hours for them to get to Bridgeport
        
             
        
        
        
To solve this problem we will apply the concepts related to the Doppler Effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other.
Mathematically it can be described as

Where,
v = Speed of sound
f' = Reflected frequency
f = Emitted Frequency 
 = Speed of the object 
Assuming that the speed of the medium is the speed of sound of 343m / s, we will then have that:

