You Have a 25-G Sample of a Metal and You

question 24

Multiple Choice

You have a 25-g sample of a metal and you would like to identify it. You are certain that the metal is either copper (specific heat = 0.093 cal/gC) , lead (specific heat = 0.031 cal/gC) , or aluminum (specific heat = 0.22 cal/gC) . You run an experiment in which you find that the metal absorbs 6.2 calories of heat when it increases in temperature from 25C to 33C. Which metal is it?

• A) copper
• B) lead
• C) iron
• D) a mixture of copper and lead
• E) It's not any of these metals.

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Definitions:

Cash Equivalent

Short-term, highly liquid investments that are easily convertible to known amounts of cash and close to their maturity.

Certificate of Deposit

A time deposit at a bank or financial institution that offers a fixed interest rate over a specified period.

Capital Acquisitions Ratio

A measure of a company’s ability to finance its investment in fixed assets through net income, indicating how much of the company’s capital is being acquired through profits.

Net Income

The amount of profit remaining after all operating expenses, taxes, and interest are deducted from total revenue.