Power of a concave lens is - 12.5 D. What is the focal length of the lens?
in lenses of power + 4.5 D and -SD are placed in contact with each other.
power of the combination, (ii) focal length of the combination.
(ii) 2 m]
ver of a thin convex lens is +3.5 D. It is placed in contact with another
ch that the combined power is + 1.0 D. Calculate: i) power of second
focal length of the second lens.
0.4 m/
power and focal length of a combination of convex lens of loca
d concave lens of focal length 10cm.
161)
f focal length 40 cm is placed in contact with concave lens of
Calculate (i) power of the combination (ii) focal length of the

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

friction

explanation:

they us to move forward and backwards