Answer:
Desertification
Explanation:
Drought and leaching leave some parts of Africa without much water, which leads to some portions of the area to turn into a desert, which can prove disastrous for the plants and animals that now find themselves in a completely different habitat.
Answer:
Part of a windmill's energy comes from hydraulic power, wind energy, and other sources.
Answer:
It really depends on the job/profession. You'll see construction workers and handymen with reflective vests and hardhats, you'll see plumbers with overalls, chefs and cooks with aprons and hairnets, etc.
Explanation:
Just take a look at the employees at construction sites, behind the counters of restaurants, and behind the desks at banks! The answer here is quite literally in plain sight!
If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
