Answer:
At 400 m the potential energy of the mountain climber doubled the initial value.
Explanation:
Given;
initial height of the mountain climber = 200 m
final height of the mountain climber, = 400 m
The potential energy of the mountain climber is calculated as;
Potential energy, P.E = mgh
At 200 m, P.E₁ = mg x 200 = 200mg
At 400 m, P.E₂ = mg x 400 = 400mg
Then, at 400 m, P.E₂ = 2 x 200mg = 2 x P.E₁
Therefore, at 400 m the potential energy of the mountain climber doubled the initial value.
Answer:
C. Energy is used for life processes (e.g. Movement, breathing, etc.)
Explanation:
As we pass from one trophic level to the next, only 10% of energy is transferred from the first trophic level to the next. This is because a lot of energy is lost to the surroundings and rest is utilised by the organism.
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.
They eat rice, chicken, beef, cereal they eat what we eat in a daily basis I guess
