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Find the electrochemical potential of a galvanic cell using Zn/Zn² and Cu/Cu² electrodes at 25°C if [Zn² ] = 0.01 M and [Cu² ] = 1.0 M.
n = 2 (number of electrons transferred). Q = [Zn² ] / [Cu² ] = 0.01 M / 1.0 M = 0.01 E_cell = E°_cell - (0.0592/n)logQ E_cell = 1.10 V - (0.0592/2)log(0.01) E_cell = 1.10 V - (0.0296)(-2) E_cell = 1.10 V + 0.0592 V E_cell = 1.1592 V. The electrochemical potential of the galvanic cell is approximately 1.16 V.
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Asked 29 days ago|2/6/2026 12:16:26 PM
Updated 29 days ago|2/6/2026 12:32:30 PM
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Find the electrochemical potential of a galvanic cell using Zn/Zn² and Cu/Cu² electrodes at 25°C if [Zn² ] = 0.01 M and [Cu² ] = 1.0 M.
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cruz30
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Added 29 days ago|2/6/2026 12:32:30 PM
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[2/6/2026 12:32:35 PM]
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Salas1987
n = 2 (number of electrons transferred).
Q = [Zn² ] / [Cu² ] = 0.01 M / 1.0 M = 0.01
E_cell = E°_cell - (0.0592/n)logQ
E_cell = 1.10 V - (0.0592/2)log(0.01)
E_cell = 1.10 V - (0.0296)(-2)
E_cell = 1.10 V + 0.0592 V
E_cell = 1.1592 V.
The electrochemical potential of the galvanic cell is approximately 1.16 V.
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Added 29 days ago|2/6/2026 12:32:10 PM
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A car of mass 1400 kg increases its speed from 10 m/s to 30 m/s in 8 s. Determine the average accelerating force.
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Question
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Updated 29 days ago|2/6/2026 8:44:17 AM
1 Answer/Comment
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cruz30
m = 1400 kg, u = 10 m/s, v = 30 m/s, t = 8 s
a = (v u) / t = (30 - 10)/8 = 2.5 m/s²
F = m × a = 1400 × 2.5 = 3500 N
Added 29 days ago|2/6/2026 8:44:17 AM
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A stone is projected vertically upward with 32 m/s. Determine the maximum height reached.
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Updated 29 days ago|2/6/2026 8:43:56 AM
1 Answer/Comment
3
cruz30
u = 32 m/s, v = 0, g = 9.8 m/s²
v² = u² - 2gh - 0 = 32² - 2×9.8×h
h = 1024 / 19.6 = 52.24 m
Added 29 days ago|2/6/2026 8:43:56 AM
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Calculate the kinetic energy of a 0.4 kg object moving at 20 m/s.
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Question
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Updated 29 days ago|2/6/2026 8:42:45 AM
1 Answer/Comment
3
cruz30
Given:
Mass m = 0.4 kg
Velocity v = 20 m/s
Kinetic Energy KE = 1/2 mv²
KE = 1/2 × 0.4 × (20)²
KE = 0.2 × 400
KE = 80 J
Final Answer: 80 J
Added 29 days ago|2/6/2026 8:42:45 AM
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A 20-ohm resistor is connected to a 30 V battery. Determine the current flowing.
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Updated 29 days ago|2/6/2026 9:04:13 AM
1 Answer/Comment
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cruz30
I = V / R = 30 / 20 = 1.5 A
Added 29 days ago|2/6/2026 9:04:13 AM
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Find the momentum of a 3 kg body moving at 15 m/s.
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p = m ? v m = 15 kg, v = 12 m/s p = 15 ? 12 = 180 kg?m/s
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Updated 29 days ago|2/6/2026 9:27:07 AM
1 Answer/Comment
3
cruz30
p = m × v = 3 × 15 = 45 kg·m/s
Added 29 days ago|2/6/2026 9:26:59 AM
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