Students have a mixture of small iron filings and grains of sand that are about the same size. how can the students most easily separate the parts of this mixture?
A. By dissolving the sand in water
B. By picking out the grains of sand by hand
C. By using a magnet to attract the iron filings
D. By using a screen to filter out the iron filings
Answers: 2
Biology, 21.06.2019 13:00
Which statements about the enhanced for loop are true for arrays of primitive data?
Answers: 1
Biology, 22.06.2019 07:00
Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.
Answers: 1
Biology, 22.06.2019 09:30
Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn
Answers: 1
Biology, 22.06.2019 13:00
Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
Answers: 1
Students have a mixture of small iron filings and grains of sand that are about the same size. how c...
Advanced Placement (AP), 13.04.2021 22:20
Mathematics, 13.04.2021 22:20
Mathematics, 13.04.2021 22:20
Mathematics, 13.04.2021 22:20
English, 13.04.2021 22:20
History, 13.04.2021 22:20
History, 13.04.2021 22:20
History, 13.04.2021 22:20
Mathematics, 13.04.2021 22:20