Answer:
12 %
Explanation:
Produces 15 J of work for input 125 J
15/125 * 100% = 12% 
 
        
             
        
        
        
Answer:
Heat
Explanation:
Temperature is the average thermal energy (or heat) in a substance. Sound isn't really related, thermometers measure temperature, and chemical reactions can produce heat, but none of those are measured by temperature.
 
        
             
        
        
        
Answer:
Explanation:
The missing image is attached below. 
The objective of this question is to draw the major product formed from the diagram attached below. 
From the diagram attached, we will see the reaction of a tertiary alkyl halide together with a weak nucleophile (ch3ch2oh) undergoing a nucleophilic substitution (SN₁) mechanism to yield a racemic mixture(i.e., compound that is not optically active but contains an equal amount of dextrorotatory and levorotatory stereoisomers) as a product.
 
        
             
        
        
        
Bit.my/3a8Nt8n here’s the link for the answer
        
             
        
        
        
(4) C8H14 is your answer. A saturated hydrocarbon means that they have no double or triple bonds. C8H14 is an alkyne, which is an unsaturated hydrocarbon.