Answer:
A, Filtration
Explanation:
Once I did an Experiment when I took a funnel, filter paper and a beaker and muddy water.
I placed the funnel on the beaker and inserted the filter paper before the hole in the funnel.
I put the mud water and clean water came out, this is because the dirt got stuck to the filter paper due to the extremely small pores of the filter paper
Answer:
after 28.8 years 250 g of Pu-241 still remaining
Explanation:
Given data:
Total amount of Pu-241 = 1000 g
Half life = 14.4 years
Amount remaining after 28.8 years = ?
Solution:
Number of half lives = T elapsed / half life
Number of half lives = 28.8 years / 14.4 years
Number of half lives = 2
At time zero = 1000 g
At first half life = 1000 g/ 2 = 500 g
At second half life = 500 g/2 = 250 g
So after 28.8 years 250 g of Pu-241 still remaining.
Answer:
4. They are a renewable resource, they reproduce. any animal and plant has some form of reproducing. A couple ways they could become nonrenewable resources are if they are exterminated through disease, habitat destruction, introduction of a harmful species.
5. Generally the discussion of overconsumption parallels that of overpopulation; that is the more people, the more consumption of raw materials to sustain their live
6. Recycling uses less energy than making a new product from scratch – even when you take account of all the related costs, like transport and wages. Mining, quarrying, logging, processing and transporting raw materials to prepare them for use in industry takes a great deal of energy.
Answer:
A helium atom with no neutrons
