A spherical ember with radius 2.0 cm glows steadily at 1.2 × 10³ K for 5.0 min before…
PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A spherical ember with radius 2.0 cm glows steadily at 1.2 × 10³ K for 5.0 min before fading. Assuming it behaves as a perfect blackbody, determine how many kilowatt-hours of energy it radiates during this interval. Use σ = 5.67 × 10⁻⁸ W m⁻² K⁻⁴.