Question

1. Which of the following is a periodic change?
a. Movement of the hands of a clock
b. Change in phases of Moon
c. Low and high tides in the sea
d. All of these​

Answer 1

Movement of hands of a clock

Answer 2

Answer:

all of these

Explanation:

the answer to it will be all of these because a periodic motion is a motion that repeats itself. The clock's hand get at the same place after covering a sec, min Or an hour. The phases of the moon also repeats itself thus causing full moon nd new moon nights. Low and high tides are also continuous in the sea