Which of the following is a FALSE statement about heat transfer:A) If an object is a good conductor of heat, it is a poor insulator.B) Even inside a cold room objects constantly radiate and absorb heat.C) Convection is the fastest form of heat transfer.D) Heat transfer by radiation propagates at the speed of light in a vacuum.E) Convection takes place in fluids.F) Radiation does not need a medium to propagate.Group of answer choices
Question
Which of the following is a FALSE statement about heat transfer:A) If an object is a good conductor of heat, it is a poor insulator.B) Even inside a cold room objects constantly radiate and absorb heat.C) Convection is the fastest form of heat transfer.D) Heat transfer by radiation propagates at the speed of light in a vacuum.E) Convection takes place in fluids.F) Radiation does not need a medium to propagate.Group of answer choices
Solution
The false statement about heat transfer is C) Convection is the fastest form of heat transfer.
Here's why:
A) If an object is a good conductor of heat, it is a poor insulator. - This is true. Good conductors of heat are poor insulators because they allow heat to pass through them easily.
B) Even inside a cold room objects constantly radiate and absorb heat. - This is true. All objects, regardless of their temperature, emit and absorb thermal radiation.
C) Convection is the fastest form of heat transfer. - This is false. The fastest form of heat transfer is radiation, which can travel at the speed of light.
D) Heat transfer by radiation propagates at the speed of light in a vacuum. - This is true. Radiation, unlike conduction and convection, does not require a medium to travel through and can propagate at the speed of light in a vacuum.
E) Convection takes place in fluids. - This is true. Convection is the transfer of heat through the movement of fluids (liquids and gases).
F) Radiation does not need a medium to propagate. - This is true. Unlike conduction and convection, radiation can travel through a vacuum.
Similar Questions
Which of the following is a TRUE statement about heat transfer:A) If an object is a good absorber of radiation, it is a poor emitter of radiation.B) Humans constantly radiate and absorb thermal radiation but on average, in winter, they radiate more heat than they absorb.C) Heat transfer by thermal radiation propagates slower than thermal conduction.D) Heat transfer by conduction propagates at speed of light.E) Convection takes place in gases and solids.F) Radiation needs medium to propagate.
How is heat transferred through convection?A.Heat is transferred through contact between molecules.B.Heat is transferred by light being changed into kinetic energy.C.Heat is transferred by energy waves moving through space.D.Heat is transferred by the movement of a liquid or gas.
The process of heat transfer by the movement of mass from one place to another is called: Question 17 Select one: a. conduction b. convection c. none of these d. radiation e. induction
Through which of the following ways can heat be transferred? A. only by direct contact between objects at different temperatures B. by direct or indirect contact between objects at different temperatures C. only by indirect contact between objects at different temperatures D. Heat can never be transferred between objects.
The process of heat transfer from object to another because of molecular motion and interaction is called: Question 20 Select one: a. none of the these b. induction c. convection d. radiation e. conduction
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