Answer:
g/9
Explanation:
length of the pendulum = L
time period on the earth = T
Time period on the planet = 3T
Let the acceleration due to gravity on the earth is g and on the planet is g'.
Use the formula for the time period of a simple pendulum for the time period on earth
.... (1)
Time period on the surface of planet is
.... (2)
Divide equation (2) by equation (1)
g' = g/9
Thus, the acceleration due to gravity on the planet is g /9
Answer:
D
Explanation:
D) When uranium-235 is split, three neutrons and a large amount of energy are released.
Answer:
C
Explanation:
When light transitions from the air to the water the light bends due to refraction. The refractive index is related to the speed of light in both air and water. The Wikipedia article on Refraction does and excellent job of explaining this.
Answer:
6.78 km
Explanation:
Length of path due east = 4.3km
Length of path south = 2.48km
Unknown:
Distance covered = ?
Solution:
The distance covered is the total length of path from start to finish. It takes cognizance of the turns and every direction moved.
Unlike displacement which only considers the net direction from start to finish, distance sums up the total path.
So;
Distance = 4.3km + 2.48km = 6.78km
