How Much Power Does a Sphere with a Radius of 10

question 25

Multiple Choice

How much power does a sphere with a radius of 10 cm radiate if is has an emissivity e = 1.0 and is kept at a temperature of 400 K? The Stefan-Boltzmann constant is 5.67 × 10^-8 W/(m²∙K⁴) .

• A)60 W
• B)70 W
• C)180 W
• D)210 W
• E)360 W

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Definitions:

Ledger Balance

The total amount recorded in a company's ledger, representing the total assets, liabilities, and shareholders' equity at a specific time.

Available Balance

The amount of money in an account that is accessible for use.

Float

The time difference between when a check is written and deposited and when it is cleared and funds are available, or, in finance, the amount of shares available for trading by the public in the stock market.

Collection Float

The time period between when a check is written and deposited and when the funds are actually available in the payee's account.