Six molecules speeds 2 unit, 5 unit, 3 unit, 6 units, 3 unit and 5 unit respectively. The rms speed is
4 unit
1.7 unit
4.2 unit
5 unit
A piece of wood is floating in water. When the temperature of water rises, the apparent weight of the wood will
increase
decrease
may increase or decrease
remain same
An experiment takes 10 min to raise temperature of water from 0°C and 100°C and another 55 min to convert it totally into steam by a stabilized heater. The latent heat of vaporization comes out to be
530 cal/g
540 cal/g
550 cal/g
560 cal/g
A wire is stretched under a force. If the wire suddenly snaps the temperature of the wire
remains the same
decrease
increase
first decrease then increase
When the room temperature becomes equal to the dew point, the relative humidity of the room is
100 %
zero %
70 %
85 %
A.
100 %
If the room temperature becomes equal to the dew point, the relative humidity of the room is 100 %.
At what temperature will the rms speed of air molecules be double that NTP ?
519° C
619° C
719° C
819° C
4 point charges each +q is placed on the circumference of a circle of diameter 2d in such a way that they form a square. The potential at the centre is
0
64 identical spheres of charge q and capacitance C each are combined to form a large sphere. The charge and capacitance of the large sphere is
64q, C
16q, 4C
64q, 4C
16q, 64C