4. Lucy is driving a motorcycle. After leaving the red light she accelerated to 31 m/s in 8 sec. What is her acceleration?

Lucy's acceleration is 3.875 ≈ 3.90 miles per second.

Explanation:

All we have to do is divide the miles by the second.

31 ÷ 8 = 3.875 ≈ 3.90

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

wher is the rest of the question