If the four samples all had the same volume, which sample would have the greatest density? sample mass
W 47
X 223
Y 85
Z 312

If four samples have the same volume, the sample with the highest mass will have the highest density, i.e. sample Z.

Explanation:

The density expresses the amount of mass that occupies a given volume, and knowing the mass and volume of a solid, the density can be determined by the formula:

           ρ = m/V

From this formula it can be determined that density is directly proportional to mass and inversely proportional to volume.

Of the four samples, the highest mass is in the sample Z (312), so this sample has the highest density.

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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glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.