The vacuum in a thermos flask helps to reduce heat transf...
The vacuum in a thermos flask helps to reduce heat transfer by?
convection and radiation
convection and conduction
conduction and radiation
radiation only
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements about friction is NOT correct? ...
In the study of Physics, temperature and heat are often confused with each other. Which of the ...
Calculate the refractive index of the material for the glass prism in the diagram above ...
A thin converging lens has a power of 4.0 diopters determined its focal length. ...
Which of the following pairs of rays shows the widest separation in the spectrum of white light? ...
The optical instrument which is suitable for viewing a nearby objects is ………..?...