A Beaker Is Filled with Water

question 89

Multiple Choice

A beaker is filled with water. A small plastic container contains a solid bar of aluminum, which has a mass of 40 g, and is placed on the water so that it floats. The water level reads 60 ml. Next, the bar of aluminum is taken out of the container and placed in the water so that it sinks to the bottom. By how much does the water level change? Density of Al is 2.7 g/cm³.)

• A) +40.0 ml
• B) -40.0 ml
• C) -25.2 ml
• D) 0 ml
• E) +25.2 ml

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Definitions:

Extrinsic Motivation

The drive to perform activities for external rewards or to avoid punishment, rather than for intrinsic enjoyment or satisfaction.

Babysitting

The temporary care of a child or children by someone other than the parents or legal guardians, usually for a few hours, involving activities such as playing, feeding, and putting the child to sleep.

Hourly Fee

A payment structure where a specified amount of money is charged for each hour of work performed.

Hierarchy of Needs

A theory in psychology proposed by Abraham Maslow, suggesting that people are motivated by five basic categories of needs: physiological, safety, love/belonging, esteem, and self-actualization, which must be fulfilled sequentially.