Answer:
a) 4500 cycles.
b) (1/15) s = 0.0667 s
c) (20/3) s = 6.667 s
Step-by-step explanation:
The blades on a fan have a frequency of 15 Hz
This means the number of cycles completed per second = 15
a) How many cycles do the blades complete in five minutes?
5 mins contains 5 × 60 seconds, that is, 300 seconds.
The fan completes 15 cycles in 1 second
In 300 seconds, it will complete
15 × 300 cycles = 4500 cycles.
b) What is the period for the fan blades?
Period = (1/frequency)
= (1/15) = 0.0667 second per cycle.
c) How long would it take for the fan blades to complete 100 revolutions?
This means how long would the fan complete 1 cycle as 1 rev = 1 complete cycle.
The fan complete 1 cycle in (1/15) second
The fan will complete 100 cycles in (100×1/15) =
(20/3) s = 6.667 s
Hope this Helps!!!