Author Question: A block of wood that weighs 10. g is immersed in water. The total amount of water displaced is 12 ... (Read 139 times)

WWatsford · **on:** Aug 27, 2018

A block of wood that weighs 10. g is immersed in water. The total amount of water displaced is 12 mL. What is the density of the block of wood?

A) 0.83 g/mL
B) 1.2 g/mL
C) 0.83 mL/g
D) 12 g/10 mL
E) 120 g/mL

Question 2

How does a neuron maintain an electric potential difference across its membrane?

A) Neurons pump potassium ions across the cell membrane.
B) Neurons activate the synaptic terminals by means of an impulse phase which reverses the electric potential.
C) Neurons eject sodium ions from their inner hollow channels priming itself for an impulse.
D) Neurons rely on the synaptic terminals to supply the electric potential.