PLEASE HURRY! IT'S TIMED! ABOUT TRANSFORMERS... The primary winding of a transformer has a 120 V ac supply, value of secondary voltage is 1200v if the turn ratio is 10.
Select one:
a. False
b. True

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

Will you chech and finish these for me, because i am stumped with them.

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10