knowledge of first aid ... eg St John Ambulance, Red Cross etc. I think that everyone in a school should be taught First Aid.
Answer:
The average speed of the runner is 18.2 km/h.
Explanation:
Hi there!
The average speed is calculated as the traveled distance over time:
speed = traveled distance / elapsed time to cover that distance
We have to find the speed in km/h, so let´s start converting the time into hours:
23 s · (1 min/60 s) = 0.38 min
15.38 min · (1 h / 60 min) = 0.26 h
Total time: 0.26 h + 2 h = 2.26 h
The distance traveled in km is:
25.5 mi · (1.61 km/ 1 mi) = 41.1 km
Then, the average speed will be:
speed = 41.1 km / 2.26 h = 18.2 km/h
The average speed of the runner is 18.2 km/h.
Answer:
The beaker holds 277.2 mL
Explanation:
Empty weight of beaker = 40.25 g
Weight of beaker with water = 317.45 g
Weight of water = 317.45 - 40.25 = 277.2 g
Density of water = 1 g/mL
We have
Mass = Volume x density
277.2 = Volume x 1
Volume = 277.2 mL
The beaker holds 277.2 mL
