Answer:
W = 47040 J
Explanation:
Given that,
The mass of a student, m = 60 kg
Height of the tower, h = 80 m
We need to find the work done in climbing the tower. The work done is given by :
W = mgh
So,
W = 60 × 9.8 × 80
W = 47040 J
So, the required work done is 47040 J.
I think the answer is Cirrus. They are flat feathery clouds that usually stretch long distances over the sky.
The whistle you use to call has a frequency of 21 kHz, so you do not recognize it also because your threshold of hearing is only 20 kHz. Since you are unable to hear sounds above this value, you request your friend to blow the whistle and move farther away. The frequency will decrease due to Doppler effect.
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JSYK khi cố gắng tìm quỹ đạo mà bạn luôn muốn biết thời tiết nó đi theo hướng Đông Nam Bắc hoặc Tây