1. friction between water molecules
2. the wave spreads out onto a larger and larger area, so per unit area, the energy of the wave goes down
<span>When Sodium moves into the neuron it causes a charge change in the neuron, making it very positive. It repolarizes by pumping sodium back out of the neuron, re-establishing the potential. Neurotransmitters transmit an impulse from one neuron to another chemically. Inhibitory neurotransmitters stop impulses, excitatory neurotransmitters create and encourage impulses. For an action potential to fire the threshold of the input source must be reached.</span>
Answer:
a. W = 2.17 x 10 ⁴ J
b. ΔU = - 5.03 x 10⁴ J
c. Q = 2.86 x 10 ⁻³ J
Explanation:
a.
The student work does 2.17 x 10⁴ J
So W = 2.17 x 10 ⁴ J
b.
The internal energy decreases 5.03 x 10⁴ J
ΔU = U₁ - U₂
ΔU = 0 - 5.03 x 10⁴ J = - 5.03 x 10⁴ J
c.
The formula heat can use:
Q = W + ΔU
Q = 2.17 x 10⁴ J + ( - 5.03 x 10⁴ J )
Q = 2.86 x 10 ⁻³ J
