MCQ
If two identical mercury drops are combined to form a single drop, then its temperature will
- ADecrease
- ✓Increase
- CRemains the same
- DNone of the above
✓
Answer
Correct option: B.
Increase
b
(b) Surface energy of combined drop will be lowered, so excess surface energy will raise the temperature of the drop.
(b) Surface energy of combined drop will be lowered, so excess surface energy will raise the temperature of the drop.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A solid sphere falls with a terminal velocity of 20m/s in air. If it is allowed to fall in vacuum,
The relation between the vectors $A$ and $-2A$ is that,
→A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is:
A positive point charge Q is brought near an isolated metal cube.
Two bodies of masses $m$ and $4 \,m$ are moving with equal $K.E.$ The ratio of their linear momentums is
→$A$ particle starts from the point $(0m, 8m)$ and moves with uniform velocity of $3\, \hat i \,m/s$. After $5$ seconds, the angular velocity of the particle about the origin will be :
→The displacement of a particle is given as function of time as $x = t^2+ 2t.$ How much displacement is covered in the first $5$ seconds?
→A block of mass $M$ slides down on a rough inclined plane with constant velocity. The angle made by the incline plane with horizontal is $\theta$. The magnitude of the contact force will be.
→Water falls from a tap, down the streamline.
When a particle moving in a circular orbit of radius 6.28 meters reaches from one end of the diameter to the other, then the ratio between the distance covered and the displacement will be :
