To Maintain an Automobile in Approximately Constant Acceleration, Its Engine $\times$

question 7

Multiple Choice

To maintain an automobile in approximately constant acceleration, its engine must develop power that increases with time. Suppose that in one situation the work done by an engine is given by
W = 7000t² + 40,000t + 100,000
Where the units are SI. The power developed by this engine at t = 2 s is

• A) 3.4 \(\times\) 10⁴ W
• B) 6.8 \(\times\) 10⁴ W
• C) 1.0 \(\times\) 10⁵ W
• D) 2.1 \(\times\) 10⁵ W
• E) 3.0 \(\times\) 10⁵ W

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Definitions:

Babbling

The production of repetitive syllables by infants, an early stage in language acquisition.

Schemes

Mental representations or frameworks that organize and interpret information in cognitive development.

Object Permanence

The understanding that objects continue to exist even when they cannot be seen, heard, or touched, a developmental milestone in children.

Tertiary Circular Reactions

Tertiary circular reactions, a concept from Piaget's stages of development, refer to the experimental and repetitive actions of infants aged 12 to 18 months to explore the properties of objects.