How Much Power Does a Sphere with a Radius of 10

question 28

Multiple Choice

How much power does a sphere with a radius of 10 cm radiate into empty space if is has an emissivity of 1.0 and is kept at a temperature of 400 K? (σ = 5.67 × 10^-8 W/m² ∙ K⁴)

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

---

Definitions:

Criminal Penalties

Punishments that may include fines, imprisonment, or other sentences imposed by a court for violations of criminal laws.

Tax Return

A form submitted to a taxation agency detailing earnings, deductions, and other relevant tax details.

IRS

The Internal Revenue Service, a U.S. government agency responsible for tax collection and tax law enforcement.

Tax Tables

Charts used to determine the amount of tax owed based on income levels, provided by tax authorities for calculating liabilities.