What physical properties of nylon and leather make them good materials to use for shoelaces? A. high density and low conductivity B. durability and flexibility C. hardness and durability D. low viscosity and flexibility.
Answer:
Acceleration of proton will be
Explanation:
We have given surface charge density of an infinite charged plate 
Electric field due to infinite sheet charge is given by 
Charge in proton is given by 
So force on proton 
Mass of proton 
According to newtons second law force F = mass × acceleration
So 

Really sad try not to let it get to you
C. Establishing a seed bank with a variety of seeds of
different crop species
Explanation:
Establishing a seed bank with a variety of seeds of different crop species is a cooperative behavior that would best enable humans to prevent the problem of loss of biodiversity of cultivated crops.
- Modern agricultural practices is profit driven and centered on mono-cropping.
- Mono-cropping is an agricultural practice in which only one crop type is cultivated on a mechanized scale.
- Mono-cropping leads to less diversity of crop species as just only the cultivation of economically important crops are encouraged.
- In order to avert the menace that comes along with mono-cropping, seed banks are viable place to keep and protect other plant species from going into extinction.
- Seed banks provides a preservation of different plant species by focusing on storing their viable seeds.
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Answer:
it is accepted all over the world
it is more reliable than other kinds of measuring system