Answer:
B. 81
Explanation:
When you multiply two numbers, round the answer to the least number of significant figures available. 67.6 has three significant figures, and 1.2 has two significant figures. So we round to two significant figures.
Answer:
I would say since it is still water the stream flow is 0km/h. Especially because he needs the same time upstream as He does down stream.
This section, known as the D-block, consists of Transition metals.
Power is the rate of doing work or using energy.
The unit of power is the watt.
1 watt = 1 joule per second
Answer:
The gravitational potential energy of the man
= mass of the man(m) × gravitational acceleration(g) × height (h)
80 Kg × 9.8 m/s^2 × 60 m
80 × 9.8 x 60 ( kg ×m^2/s^2)
47040 Joules (ans)
Hope it helps
