Answer:
C
Im not totally sure but that's what my science teacher taught me sorry if is wrong
 
        
             
        
        
        
Because of the greenhouse gases inside the greenhouse, and the gases trap the heat from the sun so the plant don't freeze, hope this helps
        
             
        
        
        
Answer:
10g
Explanation:
As the Law of Conservation of Mass states that " Mass can neither be created nor be destroyed in a chemical reaction".
Though melting of tin isn't a chemical change, the same logic is applied here... 
Hence,
The mass of tin will be 10 g itself...
 
        
                    
             
        
        
        
Answer:
mass is lifted 1.8 m. What is the potential energy of the mass 4. A 100 kg