Physics · Question 411
For ideal polyatomic gas molar specific heat is equal to:
- 24.9 J/mol.K
- 12.9 J/mol.K
- 15 J/mol.K
- 16 J/mol.K
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Correct answer: A
24.9 J/mol.K
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Physics · Question 412
x-rays images are detected on _________________ screen:
- Phosphorous
- carbon
- sodium
- helium
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Correct answer: A
Phosphorous
Physics · Question 413
Beats can be used to find
- Speed
- Frequency
- Amplitude
- Wavelentth
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Correct answer: B
Frequency
Physics · Question 414
Over one complete thermodynamic cycle, what is the net change in the system’s internal energy?
- Equal to the net work done
- Equal to the net heat absorbed
- Zero
- Always positive
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Correct answer: C
Zero
Internal energy is a state function. Because a cyclic process returns the system to its initial state, the net change in internal energy over the complete cycle is zero.
Physics · Question 415
A charged particle entered in a magnetic field anti parallel to the field, magnetic force on this particle is:
- BINA
- BeVsind
- Zero
- iqlv
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Correct answer: C
Zero
Physics · Question 416
A cyclist comes to a skidding stop in 10m. During this process, the opposing force on the cycle due to the road is 200 N. How much work does the road do on the cycle?
- —1800J
- —2000J
- 2000J
- 1900J
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Correct answer: B
—2000J
Physics · Question 417
A gas expands from V1 to V2 at pressure P. Work done is
- P/(V2-V1)
- (P2-P1)
- P (V1V2/(V2-V1))
- P ( V2-V1)
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Correct answer: D
P ( V2-V1)
Physics · Question 418
The total mass of protium deuterium and tritium is _____________ than three H atoms
- 3 neutrons
- 3 protons
- 3 electorns
- None of these
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Correct answer: A
3 neutrons
Physics · Question 419
What does the constant n represnet in the equation of state for an ideal gas PV=nRT?
- number of atoms in the gas
- number of moles of the gas
- number of nucleons
- number of molecules of gas
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Correct answer: B
number of moles of the gas
Physics · Question 420
A projectile is launched, its velocity is maximum at:
- Point of projection
- Highest point
- Between launching and highest point
- All paints
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Correct answer: A
Point of projection