A Block of Wood of Mass 400 G and Density

question 15

Multiple Choice

A block of wood of mass 400 g and density 0.8 g/cm³ is floating on the surface of a liquid of density 1.3 g/cm³.What is the difference in mass of stone (density = 1.9 g/cm³) that must be added to the block in order for the combination (wood and stone) to be just submerged rather than only the wood to be submerged?

• A)250 g
• B)540 g
• C)170 g
• D)790 g
• E)none of the above

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Definitions:

Present Value

The current worth of a future sum of money or stream of cash flow given a specified rate of return, often used in the assessment of investment profitability.

Compound Interest

It's the practice of calculating interest by considering not just the starting principal amount but also the interest that has accrued in earlier periods, applicable to deposits and loans.

Future Value

The value of an investment or asset at a specific future date, accounting for specified interest rates or returns.

Present Value

The today's value of a sum of money expected in the future or successive cash flows, considering a determined rate of return.