A solid sphere with an initial temperature Ti is immersed in a large thermal re

Sail E0 Webinar

Question

A solid sphere with an initial temperature Ti is immersed in a large thermal reservoir of temperature T0. The sphere reaches a steady temperature after a certain time t1. If the radius of the sphere is doubled, the time required to reach steady-state will be

Options:

A . t1/4

B . t1/2

C . 2t1

D . 4t1

Answer: Option D

-NA-

Was this answer helpful ?

Next Question

Submit Solution

More Questions on This Topic :

Question 1. For heat transfer across a solid-fluid interface, which one of the following statements is NOT true when the Biot numbe....when the Biot number is very small compared to 1?

Question 2. In the McCabe-Thiele diagram, if the x -coordinate of the point of intersection of the q -line and the vapor-liquid equ....the feed point, then the quality of the feed is

Question 3. The Newton “ Raphson method is used to find the roots of the equation f(x) = x - cos Ï€x 0 â‰¤ x â‰¤ 1. If....then the value of x after the first iteration is

Question 4. Consider a binary liquid mixture at constant temperature T and pressure P . If the enthalpy change of mixing, âˆ†H ....free energy change of mixing at 300 K occurs when

Question 5. An insulated, evacuated container is connected to a supply line of an ideal gas at pressure Ps, temperature Ts and spec....the final temperature of the gas in the container is

Question 6. A bed of spherical glass beads (density 3000 kg/m3 diameter 1 mm, bed porosity 0.5) is to be fluidized by a liquid of d....minimum velocity (in m/s) required to fluidize the bed is

Question 7. The rate-controlling step for the solid-catalyzed irreversible reaction A + B ---> C is known to be the reaction of ads....the form of the Langmuir-Hinshelwood rate expression will be

Question 8. In a counter-flow double pipe heat exchanger, oil (m = 2 kg/s, CP = 2.1 kJ/kg.°C) is cooled from 90 °C to 40 °C by w....on the inner radius, in kW / m2. K, is

Question 9. Heat is generated at a steady rate of 100 W due to resistance heating in a long wire (length = 5 m, diameter = 2 mm). T....at the interface between the wire and the insulation is

Question 10. A crosscurrent cascade of N ideal stages is used to treat a feed stream of molar flow rate E. The feed stream contains ....in the exit raffinate stream i.e. (x0/xN) is given by

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

GPOE / GPA Combined 1 Free Mock Test SAIL JO E-0 2024

Chapter 3.1 : INTRODUCTION Chapter 3 : Sinter Plant SAIL E0 - GPOE/GPA 2024

Chapter 2.3 : COAL HANDLING PLANT - Set 1 Chapter 2 : Coke Ovens and Coal Chemicals SAIL E0 - GPOE/GPA 2024

Chapter 1.1 : INTRODUCTION Chapter 1 : Raw Material Handling Plant SAIL E0 - GPOE/GPA 2024

DSP Combined 1 Free Revision Test SAIL JO E-0