Answer:
 At the sending end, the information to be sent, in the form of a time-varying electrical signal, is applied to a radio transmitter. ... The radio waves carry the information to the receiver location.
Explanation:
 
        
             
        
        
        
Answer:
a)1.13×10³
b)1.6×10³
Explanation:
Given:
Boltzmann's constant (K)=1.38×10^-23 J/K
atmoic mass of helium = 4 AMU or 4×1.66×10^-27kg
a)The formula for RMS speed (Vrms) is given as

where
K= Boltzmann's constant
T= temperature
m=mass of the gas


b) RMS speed of helium when the temperature is doubled


 
        
                    
             
        
        
        
Answer:se obesrva ca indicele de refractie NU are unitate de masura, este adimensional. Se exprima print-un raport, de exemplu 4/3, 1,5 etc.
Explanation:
 
        
             
        
        
        
Answer:
Vibrating means to move quickly to and fro.
Explanation: