Chemistry, 11.11.2019 15:31 lil8174

Caleb is an inventor who has designed a new kind of fishing net. he is looking for a strong, flexible material that can be used to hold a lot of weight and will not dissolve in water. he wants a synthetic material so he does not have to depend on harvesting a natural product. which material would be best for caleb’s invention? cellulose nylon polystyrene vulcanized rubber

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Answer from: lukeakalucas

nylon would be the best material for him to use

Answer from: darius5349

Answer;

Nylon

Explanation;Nylon is an example of a synthetic fiber that is made when monomers are combined a polymerization reaction, called condensation polymerization to form a long chain polymer. These monomer are the hexamethylene and adipic acid that combine creating a polymer of nylon and water molecules.Nylon is a strong synthetic fiber that does not shrink or stretch through washing and also has ability to resist mechanical pressures.Therefore, Caleb's invention could best be suited with Nylon, which is a synthetic fiber.

Answer from: Quest

chemists can use the electron cloud model to assign electrons to different atomic orbitals. atomic orbitals also explain the patterns in the periodic table

explanation:

Answer from: Quest

Answer: abeexplanation:

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

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Caleb is an inventor who has designed a new kind of fishing net. he is looking for a strong, flexibl...