Exhibit 3-2

a Child Starts at One Corner $2 \hat { \mathbf { i } } + 2 \hat { \mathbf { j } } + 2 \hat { \mathbf { k } }$

question 42

Multiple Choice

Exhibit 3-2

A child starts at one corner of a cubical jungle gym in a playground and climbs up to the diagonally opposite corner.The original corner is the coordinate origin,and the x,y and z axes are oriented along the jungle gym edges.The length of each side is 2 m. Use this exhibit to answer the following question(s) .
-Refer to Exhibit 3-2.The child's displacement is:

• A) \(2 \hat { \mathbf { i } } + 2 \hat { \mathbf { j } } + 2 \hat { \mathbf { k } }\)
• B) \(2.8 \tilde { \mathbf { i } } + 2.8 \tilde { \mathbf { j } } + 2 \tilde{ \mathbf { k } }\)
• C) \(2 \tilde { \mathbf { i } } + 2 \tilde { \mathbf { j } } + 2.8 \tilde{ \mathbf { k } }\)
• D) \(2 \tilde { \mathbf { i } } + 2 \tilde { \mathbf { j } } + 3.5 \tilde{ \mathbf { k } }\)
• E) \(3.5 \hat { \mathbf { i } } + 3.5 \hat { \mathbf { j } } + 3.5 \hat { \mathbf { k } }\)

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Definitions:

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A species of bacterium that thrives in hot environments and is a source of Taq polymerase, a key enzyme in PCR (polymerase chain reaction) technology.

Agrobacterium

A genus of bacteria known for its ability to transfer DNA to plant cells, widely used in genetic engineering to introduce new genes into plant genomes.

Extreme Halophiles

Organisms that thrive in highly saline environments, often found in salt lakes and evaporation ponds.

Salt

Compound that releases ions other than H+ and OH– when it dissolves in water.