7. determine the amount of potential energy of a 5.0kg book that is moved to three different

shelves on a bookcase. the height of each shelf is 1.0 m, 1,5 m, and 2.0 m.

Answer

given,

mass of the book  = 5 Kg

height of the be shelves

h₁= 1 m ,                  

h₂ = 1.5 m                        

h₃ = 2 m                            

the potential energy of each selves

P₁ = mg h₁                      

P₁ = 5 x 9.8 x 1                  

P₁ = 49 J                

P₂ = mg h₂                

P₂= 5 x 9.8 x 1.5        

P₂ = 73.5 J            

P₃ = mg h₃              

P₃= 5 x 9.8 x 2        

P₃ = 98 J                    

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

no

sodium is solid at rt