Answer:
Sixteen years old is the age where the biggest difference between the average height of boys and girls can be observed. This is a difference of approximately 5.7 cm.
Explanation:
As we know, for biological reasons, boys and girls have different growths and different development in their bodies. However, the growth and development of boys and girls during childhood is very similar and only starts to look different even from adolescence, where individuals have great structural differences.
At 16 years of age, boys and girls have the greatest mean difference in height. While in previous years this difference was on average 1 centimeter, at 16 years old, girls are 150.8 cm tall on average, while boys are 156.5 cm tall.
Answer:True
Explanation:
Answer:
Acceleration, a = 1.64 m/s²
Explanation:
It is given that,
A rock is dropped on the moon, its initial velocity u = 0 m/s
Its speed increases from 0 to 4.9 m/s, v = 4.9 m/s
Time taken, t = 3 seconds
We have to find the magnitude of the acceleration due to gravity on the moon. The magnitude of acceleration is given by :
Acceleration, a = rate of change of velocity
a = 1.64 m/s²
So, the value of acceleration of gravity on the moon is 1.64 m/s². Hence, this is the required solution.
Acceleration = (change in speed) divided by (time for the change).
From the figures given in the question, the acceleration is ( 49/3 ) =
16.33 m/sec2
.
There's no way that this is happening on the moon. That acceleration is about 67%
greater
than the acceleration of gravity on the earth's surface. It should be about 83%
less,
or about
1.63 m/sec
2
.
I see the problem now. The '49' in the question should be '
4.9
'.
apex- 1.63 m/s2