Thermal energy/ or heat usually moves in one direction only. From hot toward cold. So this statement is false because energy flows from warm to cold.
        
             
        
        
        
1. It resulted in a huge shock in the community fallowed by an election of Abu-Bakr as the leader of the state
2. Historically, getting support from locals and having a strong belie and high morale allowed them to defeat the empires. 
3. Islam spread via missionary spread Islam in the empire. Islam had a very simple message and could be accepted universally, so it was appealing to many. 
4. he allowed the Muslim state to continue operating, taking the position as the Calif
5. They encouraged conversion but where tolerant so long as a toll tax was payed and peace was maintained. 
 
        
             
        
        
        
A feeble Executive<span> implies a </span>feeble<span> execution of the government. A </span>feeble <span>execution is but another phrase for a bad execution; and a government ill executed.</span>
        
             
        
        
        
The correct answer is frequency
The Doppler effect is characterized by the change in the sound frequency emitted by a source, perceived by an observer when there is relative movement. A typical example of the Doppler effect is the case of an ambulance with the siren on, during the approach or removal of an observer.