Which of the following equation does not represent a SHM?
cosωt + sinωt
sinωt cosωt
1 sin2ωt
sinωt + cos (ωt + )
Emissive and absorptive power of a material at 2000 K is 8 and 10 respectively, calculate the emissivity of IBB (Ideal black body)
0.2
0.4
0.6
0.8
What is your observation when two sources are emitting sound with frequency 499 Hz and 501 Hz?
Frequency of 500 Hz is heard with change in intensity take place twice.
Frequency of 500 Hz is heard with change in intensity take place once.
Frequency of 2 Hz is heard with change in intensity take place once.
Frequency of 2 Hz is heard with change in intensity take place twice.
Assertion: Transverse sound wave does not occurs in gases.
Reason: Gases cannot sustain shearing strain.
If both assertion and reason are true and the reason is correct explanation of assertion.
If both assertion and reason are true but reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: CP is always greater than CV in gases.
Reason: Work done at constant pressure is more than at constant volume
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: During rapid pumping of air in tyres, air inside the tyre is hotter than atmospheric air.
Reason: Adiabatic process occurs at very high rate.
If both assertion and reason are true and reason is correct explanation of assertion.
If both assertion and reason are true but reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is correct explanation of assertion.
When you pump up a tire, the process can be assumed to be adiabatic since it happens fast enough that there is no time for heat exchange.
But when you apply the adiabatic relationships for the compressions of air into a tire, you get answers that say the pressure increased and volume decreased ( as expected), but you find that the temperature also increased to over 100 degrees celcius.