A Block Moves at 5 M/s in the Positive X

question 64

Multiple Choice

A block moves at 5 m/s in the positive x direction and hits an identical block, initially at rest.A small amount of gunpowder had been placed on one of the blocks.The explosion does not harm the blocks but it doubles their total kinetic energy.After the explosion the blocks move along the x axis and the incident block has a speed of:

• A)1.8 m/s
• B)3.2 m/s
• C)5.0 m/s
• D)6.8 m/s
• E)7.1 m/s

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Definitions:

Electron Transport Chain

A series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.

Glycolysis

The metabolic pathway that breaks down glucose to pyruvate, generating energy and pyruvate molecules, occurring in the cytoplasm of cells.

Eukaryotes

Organisms whose cells contain a nucleus and other membrane-bound organelles, including animals, plants, fungi, and protists.

Phosphorylation

The introduction of a phosphate group into an organic molecule. See kinases.