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.
The S.I units of frequency, period and amplitude of a wave are respectively...
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The diagram above is the heating curve for a solid, QR is the? ...
Which of the following is NOT correct? i. the pitch of a sound note depends on the frequency of v...