In all atoms of bismuth the number of electrons must equal to
1 answer:
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Answer:
The average speed is 3.5 mi/h
Explanation:
Average speed is given by
If the total distance covered is mi,
Then mi was covered while hiking and
mi was covered while running.
Now, we will find the time taken while hiking and the time taken while running
- For the time taken while hiking
Speed = 2.9 mi/h
Distance = mi
From,
Time = h
Time taken while hiking is 0.2299 h
- For the time taken while running
Speed = 5.6 mi/h
Distance = mi
Time = h
Now, for the average speed
Total distance = mi +
mi =
mi
Total time = +
=
h
∴
Average speed = 3.4552 mi/h
Average speed ≅ 3.5 mi/h