Liquids, Temperature and Pressure
2kg of water is heated with a heating coil which draws 3.5 A from a 200 V mains for 2 minutes . What is the increase in temperature of the water?
A reservoir 500m deep is filled with a fluid of density 850 kgm-3 . If the atmospheric pressure is 1.05 x 105 Nm -2, the pressure at the bottom of the reservoir is
4.28 X 106 Nm-2
4.72 X 106 Nm-2
4.25 X 106 Nm3
4.36 X 106 Nm-3
An immersion heater rated 2.0 A, 240 V is used to boil water from temperature 52°C to 100°C. If the mass of the water is 2.5 kg, determine the time taken to boil the water
1.05 x 105s
1.05 x 104s
1.05 x 102s
1.05 x 103s
If the relative density of gold is 19.2, the volume of 2.4 kg of gold is
4.61 x 10-3m3
8.00 x 10-3m3
1.25 x 10-4m3
1.92 x 10-4m3
Two liquids L1 and L2 are contained in a U-tube. The height and the density of L1 are 8cm and 103 kgm-3 respectively. If the density of L2 is 800kgm-3, its height measured from the same level is
A 3 m3 volume of liquid W of density 200 kgm-3 is mixed with another liquid L of volume 7 m3 and density 150 kgm-3. The density of the mixture is
The change in volume when 450kg of ice is completely melted is
A hose of cross-sectional area 0.5m2 is used to discharge water from a water tanker at a velocity of 60ms-1 in 20s into a container . If the container is filled completely, the volume of the container is
|S. V. P. (mmHg)||4.58||6.51||8.94||12.67||55.10||149.00|
The table above shows the saturation vapour pressure against temperature in a certain town. If the vapour pressure in this town at 200C is 10mmHg, what is the relative humidity?
Which of the following is the correct shape of the velocity-time graph of a spherical steel ball dropped into a viscous fluid in a tall cylinder?
The hydrostatic blood pressure difference between the head and feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy.
The pressure of 3 moles of an ideal gas at a temperature of 27°C having a volume of 10-3 m3 is
2.49 x 106Nm-2
7.47 x 106Nm-2
2.49 x 105Nm-2
7.47 x 105Nm-2
The pressure of a given mass of a gas changes from 300Nm-2 to 120Nm-2 while the temperature drops from 127°C to 73°C. The ratio of the final volume to the initial volume is
5 : 2
2 : 5
A gas with initial volume 2 x 10-6m3 is allowed to expand to six times its initial volume at constant pressure of 2 x 105 Nm-2. The work done is
|Day 1||Day 2||Day 3|
The readings above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days.
was least on Day1
At a fixed point below a liquid surface, the pressure downward is P1 and the pressure upward is P2. It can be deduced that
P1 > P2
In a thermometer reaction, the total initial mass is 5.02 x 10-27 kg and the total final mass is 5.01 x 10-27 kg. The energy released in the process is
9.0 x 10-10 J
9.0 x 10-11 J
9.0 X 10-12 J
9.0 x 10-13 J
The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junction of 20°C and 80°C respectively is
3.0 x 102 Km-1
3.0 X 103 Km-1
5.0 X 103 Km-1
3.0 X 104 Km-1
In the J-tube below, Y and X are on the same horizontal level and 30cm2 of air is trapped above Y when the atmospheric pressure is 75cm Hg. Calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X.
The atmospheric pressure due to water is 1.3 x 106 Nm-2 . What is the total pressure at the bottom of an ocean 10 m deep?
1.3 X 107 Nm-2
1.4 X 106 Nm-2
1.4 X 105 Nm-2
1.0 X 105 Nm-2