Using a certain concave mirror, the magnification
was
found to be 4 times as great when the objecte was 25.com
from the mirror as it is , with the object at. 40 cm, from
the mirror, the image being real in both cases. Calculate
the focal length of the mirroy. [Ans. 20cm]

Need this now! do pilots live long

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?

What energy transformations occur each time the skateboarder rolls up the ramp?