Question

Please solve numbers 1 and 5. Please kindly do it fast with full method.

Answer 1

1)(a)1.25 (b)0.8s
5)100Hz

Answer 2

1)total number of times the heart beats = 75
total time taken = 60 sec
frequency = 75/60
= 1.25/s

time period = 1/frequency
= 0.8 sec

5) time = 0.4 sec
oscillations = 40
frequency = 40/0.4
= 100 Hz