Answer:
Explanation:
Remark
Anybody who has dealt with Christmas Tree lights knows what can be done. You must take a bulb you know to be good and try each bulb in turn until the whole string lights up. If two bulbs are dead, give up and go buy another string. Two bulbs create a lot of combinations.
The circuit is a series circuit.
Explanation:
The relationship of the speed of sound, its frequency, and wavelength is the same as for all waves: vw = fλ, where vw is the speed of sound, f is its frequency, and λ is its wavelength.
Let , speed of bowling ball is v .
Time taken by ball to hit the pins , 
.
Speed of sound , u = 343 m/s .
Time taken by sound to reach ear , 
.
Now ,
Time taken by sound to hear after release :
Hence , this is the required solution .
In longitudinal waves, the motion of the particles in a medium is across the direction of the wave.
