Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
+1 vote
2.9k views
in Physics by (8.8k points)

According to Stefan’s law of radiation, a black body radiates energy σ  T4 from its unit surface area every second where T is the surface temperature of the black body and σ = 5.67 × 10–8 W/ m2K4 is known as Stefan’s constant. A nuclear weapon may be thought of as a ball of radius 0.5 m. When detonated, it reaches temperature of 106K and can be treated as a black body. 

(a) Estimate the power it radiates. 

(b) If surrounding has water at 30 C ° , how much water can 10% of the energy produced evaporate in 1 s?

[Sw = 4186.0 J/kgK and Lv = 22.6 x 105 J/kg]

(c) If all this energy U is in the form of radiation, corresponding  momentum is p = U/c. How much momentum per unit time does it impart on unit area at a distance of 1 km?

1 Answer

0 votes
by (13.8k points)
selected by
 
Best answer

(i) 1.8 × 1017 J/S

(ii) 7 × 109 kg

(iii) 47.7 N/m2.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...