Physics questions
20027 published questions with worked solutions.
- The unit of Stefan's constant in S.I. system will be
- Newton's law of cooling refers to
- Graph of rate of cooling against time is (assume Newton's law of cooling)
- Two thermometers A and B are exposed to sunlight. The valve of A is painted black but that of B is not painted. The correct...
- In terms of mechanical unit, c_p - c_v = _____, where c_p and c_v are principal specific heats
- According to Newton's law of cooling, the rate of cooling of a body is proportional to ( )^n, where is the difference of the...
- Newton's law of cooling is also applicable to
- Newton's law of cooling is applicable for
- The coefficient of transmission of an opaque body is
- Greenhouse effect is the consequence of
- Emissive power of a perfectly black body
- If the pressure of an ideal gas decrease by 10% isothermally, then its volume will
- At pressure P and absolute temperature T, a mass M of an ideal gas fills a closed container of volume V. An additional mass 2M of...
- A fixed mass of a gas occupies a volume V at a pressure P and the absolute temperature T. The mass of each molecule is m and k_B...
- Half a mole of helium at 27°C and at a pressure of 2 atmosphere is mixed with 1.5 mole of N_2 at 77°C and at a pressure of 5...
- For ideal gas equation PV = XT, X is proportional to
- For two gases A and B, T_A M_A = 4. T_B M_B , where T is the temperature and M is molecular mass. If (c_ rms )_A and (c_ rms )_B...
- What is average velocity of gas, if velocities of three molecules of gas are 3 m/s, 4 m/s and 5 m/s?
- Two molecules have velocities equal to +5 cm/s and -5 cm/s. Their average and root mean square velocities respectively are
- The path lengths travelled by a molecule A in 6 collisions are 3, 7, 1, 2, 4, 3 units respectively. The mean free path of the...