In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn ? Zn+2 + 2e- rxn B: 2 NH4+ + 2e- ? 2 NH3 + H2 Which reaction is taking place at the anode?
A) rxn A
B) rxn B
C) Both reactions are happening at both the anode and cathode.
D) Both reactions are happening at the electrode.
E) The reaction takes place at the electrode, not the anode.
A
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Which of the following is true about how waves form and break upon the shore?
A) Most waves form from upwelling of deep waters. B) Waves get smaller as wind speed increases. C) Waves begin to change when they reach water shallower than wave base. D) Waves break in a counterclockwise direction because of rotation of the Earth. E) None of these are correct.
A parcel of air at the surface is heated which expands the air and increases the parcel's volume. If the same number of air molecules occupy the greater volume, density decreases. The increase in volume results in lower pressure. What will happen to the air surrounding this parcel?
A. Less dense air flows in to replace the rising air. B. Denser air flows in to replace the rising air. C. More dense air rises at the surface. D. Less dense air sinks at the surface.
To human geographers, which of the following statements is NOT true? Culture
A) is a shared sets of meanings. B) is lived through the materials and symbolic practices of everyday live. C) is based on our genetic inheritance. D) can be transformed by forces internal and external to particular groups. E) includes values, beliefs, practices, language, identities.
Describe the factors influencing the weathering process
What will be an ideal response?