The formula PE(Potential Energy)= mgh
Answer :
Explanation :
It is given that,
length of pendulum, l = 0.6 m
Number of oscillation, n = 20
time, t = 35.5 seconds
so, Time period, 

we know that the time period of pendulum is given by




or

Answer: 25.2 km
<u>Explanation:</u>
3 blocks east and four blocks east = 7 blocks
1 block = 0.3 km --> 7 blocks = 2.1 km
12 times 2.1 km = 25.2 km
Answer:
area is the space bounded by certain lines, the SI unit of area is m²
area of rectangle =l×w×h
square=l²