You hike two thirds of the way to the top of a hill at a speed of 2.9 mi/h and run the final third at a speed of 5.6 mi/h. What was your average speed?

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

Speed = 2.9 mi/h

Distance = mi

From,

Time = h

Time taken while hiking is 0.2299 h

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

whitney would be experiencing fear or unintentional terror

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000