The human population is increasing, so more food needs to be produced. Farmers use fertilisers to increase the yield of wheat. A farmer wants to find out the optimum concentration of fertiliser to use on his wheatplants.
He has a stock solution of concentrated fertiliser which is state das 100%. He dilutes the stock solution to make 5%, 10%, 15% and 20% solutions. He makes 100 cm3 of each solution.

(i)Describe how the farmer prepares 100 cm3 of the 20% solution?

Iwill make you brainliest pleeze answer this fast i have to turn it in really soon brainliest promise easy question 6th grade ! a weather map shows a high pressure system with circles around it. what does this mean? a) an occluded front b) areas of equal altitude c) areas of equal pressure d) a stationary front

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?