Answer:
I think the awnser is B (but don't qoute me on that)   if its right then yay but if its wrong im sorry
Explanation:
 
        
                    
             
        
        
        
Answer:
Explanation:
 average speed more than 25.0m/s. 
 
        
                    
             
        
        
        
Answer:
Four fundamental forces are gravitational, electromagnetic, strong, and weak.
Explanation:
The gravitational and electromagnetic interactions, which produce significant long-range forces whose effects can be seen directly in everyday life and the strong and weak interactions, which produce forces at minuscule, subatomic distances and govern nuclear interactions.
 
        
             
        
        
        
When you heat something of cool it down you don't change the substance you might change the why is looks, but it is still the same substance. For example you cool water to 0 degrees Celsius it turns into ice but it still is two parts hydrogen and one part oxygen H2O. Physical changes will change state and/or form but it will still be what it originally was on the molecular level. Hope that helped. 
        
                    
             
        
        
        
The correct option is (D) Gamma ( 

 )
Explanation:Now this question is a tricky one because all of these options are somehow involved in radioactive decay; however, in this case the SYMBOL is required NOT the elements. There are three symbols involved in radioactive decay, which are:
1. α for alpha decay
2. β for beta decay
3. γ for gamma decay 
In the options only one symbol is present which is 
gamma. Hence option (D) Gamma ( 
 ) is the correct answer.
-i