A Knight on Horseback Holds a 10-M Lance

question 42

Multiple Choice

A knight on horseback holds a 10-m lance.The horse can run at 0.70 c.(It wins most of its races!) How long will the lance appear to a person that is standing still on the ground as the horse runs past?

• A)7.1 m
• B)10 m
• C)14 m
• D)15 m

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Definitions:

Acetyl CoA

A molecule that plays a central role in metabolism, linking the glycolysis and citric acid cycle pathways.

Citric Acid Cycle

Series of chemical reactions in aerobic cellular respiration in which acetyl coenzyme A is completely degraded to carbon dioxide and water with the release of metabolic energy that is used to produce ATP; also known as the Krebs cycle and the tricarboxylic acid (TCA) cycle.

Glycolysis

The first stage of cellular respiration as well as fermentation; literally the “splitting of sugar.” The metabolic conversion of glucose into pyruvate, accompanied by the production of ATP

Oxidative Decarboxylation

A metabolic process in which a carboxyl group is removed from a molecule as CO2, typically coupled with the reduction of NAD+ to NADH.