Please help.,

Explanation:

in all the question we have to use same technique

in 1 question

weight/force exerted by dorje(F)=1500N

total surface area of sole(A)=0.5m²

we know that,

   P=

or, p=

∴ P=3000pa

in question 2nd

pressure(P)=40 pa

force exerted by block(F)=80N

we know,

pressure(P)=

   area=

∴area =2m

ow you can do other by yourself

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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