An Inventor Develops a Stationary Cycling Device by Which an Individual

question 10

Multiple Choice

An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended into heat for warming water. How much mechanical energy is required to increase the temperature of 300 g of water (enough for 1 cup of coffee) from 30 $\degree$ C to 90 $\degree$ C? (1 cal = 4.186 J, the specific heat of water is 4186 J/kg · $\degree$ C)

• A) 94,000 J
• B) 75,000 J
• C) 5400 J
• D) 14 J

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Definitions:

Stranger Wariness

The fear or distress that infants and young children may experience when encountering unfamiliar people, typically emerging around 6 to 12 months.

Fear Of The Unknown

An anxiety or apprehension about something that is not known or familiar.

Laughter

The audible expression or appearance of mirth, joy, or amusement, which often involves contractions of the diaphragm and other parts of the respiratory system.

Social Smile

A smile from an infant that is directed towards people, typically emerging around 6 to 8 weeks of age, signifying the beginning of social development.