A Circular Coin Is 33

question 20

Multiple Choice

A circular coin is 33.3 cm from a concave spherical mirror.(Assume the coin is on the optical axis.) The image of the coin is produced 23.3 cm towards the mirror from its real position.Calculate the focal length of the mirror.

• A)15.4 cm
• B)7.69 cm
• C)13.7 cm
• D)27.4 cm
• E)10.0 cm

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Definitions:

Ordinary Simple Interest

Interest calculated on the principal amount only, without compounding, usually over a period of a year or less.

360-Day Year

A financial convention or calculation basis where the year is assumed to consist of 360 days rather than 365 or 366 days, often used in interest rate calculations.

Ordinary Simple Interest Rate

The standard method of calculating interest, typically based on the original loan amount, rate, and time.

360-Day Year

A conventional method in finance where the year is assumed to have 360 days for simplifying interest rate calculations, commonly used in commercial lending.