2) The power of a thin convex lens is +3,5 D. It is placed in contact with another thin lens, such that the combined power is + 1,0 D. Calculate; a, power of second
lens b. focal length of the second lens,
coniant in designing lensa frontiralinotrument

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit