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10 gm of steam at 100 degree celcius is mixed with 50 gm of ice at 0 degree celcius then final temperature is....???
A rod of uniform cross-sectional area A and length L has a weight W. It is suspended vertically from a fixed support. If the material of the rod is homogeneous. Then the elongation of the wire is
Consider a compound slab consisting of two pieces of same length and different materials having equal thicknesses and thermal conductivities K and 2K respectively. The equivalent thermal comductivity of the slab is?
Ans (4/3)K
How?
A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amiunt of heat Q in time t. The ,etallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat comducted by the new rod, when placed in thermal contact with the two reservoirs in time t?
Ans Q/16
a constant volume gas thermometer shows pressure reading of 50 cm and 90 cm of mercury at 0 degree celcius and 100 degree celcius respectively. When the pressure reading is 60 cm of mercury, what will be the temperature?
a pendulum clock is 5 sec fast at temp of 15 degree C and 10 sec slow at at temp of 30 degree C . at what temp does it give the correct time?
a sphere,a cube and a thin circular plate have the same mass and are made of the same material all of them are heated to same temperature. the rate of cooling is
a) the maximum for the sphere and minimum for the plate
b) the maximum for the sphere and minimum for the cube
c) both a and b
d)none of the above
(UPSEE 2013)
6 gm of steam at 100 degree celcius is mixed with 6 gm of ice at 0 degree celcius. the mass of steam left uncondensed is....????
When 1 kg of ice at 0 deg cel melts to water at 0 deg cel, the resulting change in entropy, taking latent heat of ice to be 80 cal/deg cel is?
Ans 293 cal/K
A graph is plotted by taking pressure along y-axis and centigrade temp along x-axis for an ideal gas at constant volume. X intercept of the graph is?
Ans -273.15 deg cel
The heat capacity of a body depends on the mass of the body and the material of the body.WHY?
if a thermometer reads freezing point of water as 20 degree celcius and boiling point as 150degree celcius , how much thermometer read when the actual temperature is 60 degree celcius?
Question: - Water equivalent of a body is measured in kg. Why?
the specific heat of a metal at low temperatures varies according to S=aT^3, wher a is a constant and T isis absolute temperature.what isthe heat energy needed to raise unit mass of the meatl from temperature T=1K to T=2K?
540 g of ice at 0 degree celsiusmixed with 540 g of water at 80 degree celsius . The final temperature of the mixture is ..
why is Cp greater than cv?
Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation between TA and TB?
a piece of metal floats on mercury. The coefficient of volume expansion of metal and mercury are y1 and y2respectively. If their temprature is increased by dt, the fraction of the volume of metal submerged in mercury is increased by1) (1 + y2dt/1 + y1dt) 2) (1 + y2dt/1 - y1dt)3) (1 -y2dt/1 +y1dt) 4)y2/y1
Question: - The Specific Heat Capacity of a body depend on the material of the body. Why?
explain thermal expansion on the basis of intermolecular forces.
a cubical vessel of side 10 cm is filled with ice at 0oc and is immersed in a water bath at 100oc if the thickness of the walls of vessel is 0.2 CGS units, then the time in which all the ice melts is(density of ice: 0.9 gm/cc)
a) 6 sec
b) 9 sec
c) 12 sec
d) 15 sec
Question:- The mechanical equivalent of heat is dimensionless. Why?
Water falls from a height of 500m. What is the rise in temp. of water at bottom if whole energy remains in the water?
E.g: 9876543210, 01112345678
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Syllabus
10 gm of steam at 100 degree celcius is mixed with 50 gm of ice at 0 degree celcius then final temperature is....???
A rod of uniform cross-sectional area A and length L has a weight W. It is suspended vertically from a fixed support. If the material of the rod is homogeneous. Then the elongation of the wire is
Consider a compound slab consisting of two pieces of same length and different materials having equal thicknesses and thermal conductivities K and 2K respectively. The equivalent thermal comductivity of the slab is?
Ans (4/3)K
How?
A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amiunt of heat Q in time t. The ,etallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat comducted by the new rod, when placed in thermal contact with the two reservoirs in time t?
Ans Q/16
How?
a constant volume gas thermometer shows pressure reading of 50 cm and 90 cm of mercury at 0 degree celcius and 100 degree celcius respectively. When the pressure reading is 60 cm of mercury, what will be the temperature?
a pendulum clock is 5 sec fast at temp of 15 degree C and 10 sec slow at at temp of 30 degree C . at what temp does it give the correct time?
a sphere,a cube and a thin circular plate have the same mass and are made of the same material all of them are heated to same temperature. the rate of cooling is
a) the maximum for the sphere and minimum for the plate
b) the maximum for the sphere and minimum for the cube
c) both a and b
d)none of the above
(UPSEE 2013)
6 gm of steam at 100 degree celcius is mixed with 6 gm of ice at 0 degree celcius. the mass of steam left uncondensed is....????
When 1 kg of ice at 0 deg cel melts to water at 0 deg cel, the resulting change in entropy, taking latent heat of ice to be 80 cal/deg cel is?
Ans 293 cal/K
How?
A graph is plotted by taking pressure along y-axis and centigrade temp along x-axis for an ideal gas at constant volume. X intercept of the graph is?
Ans -273.15 deg cel
How?
The heat capacity of a body depends on the mass of the body and the material of the body.WHY?
if a thermometer reads freezing point of water as 20 degree celcius and boiling point as 150degree celcius , how much thermometer read when the actual temperature is 60 degree celcius?
1. both will emit equal amount of radiation per unit time in the beginning
2. both will absorb equal amount of radiation from the surrounding in the beginning
3.the initial rate of cooling dT/dt will be the same for the two spheres
4.The two spheres will have equal temperatures at any instant
kidly give me the correct answer and explaination
Question: - Water equivalent of a body is measured in kg. Why?
the specific heat of a metal at low temperatures varies according to S=aT^3, wher a is a constant and T isis absolute temperature.what isthe heat energy needed to raise unit mass of the meatl from temperature T=1K to T=2K?
a> 4.5 x 106 J/kg
b> 4.5 x 106 cal/kg
c> 4.5 x 104 J/kg
d> 4.5 x 104
540 g of ice at 0 degree celsiusmixed with 540 g of water at 80 degree celsius . The final temperature of the mixture is ..
why is Cp greater than cv?
Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation between TA and TB?
a piece of metal floats on mercury. The coefficient of volume expansion of metal and mercury are y1 and y2respectively. If their temprature is increased by dt, the fraction of the volume of metal submerged in mercury is increased by
1) (1 + y2dt/1 + y1dt) 2) (1 + y2dt/1 - y1dt)
3) (1 -y2dt/1 +y1dt) 4)y2/y1
Question: - The Specific Heat Capacity of a body depend on the material of the body. Why?
explain thermal expansion on the basis of intermolecular forces.
a cubical vessel of side 10 cm is filled with ice at 0oc and is immersed in a water bath at 100oc if the thickness of the walls of vessel is 0.2 CGS units, then the time in which all the ice melts is(density of ice: 0.9 gm/cc)
a) 6 sec
b) 9 sec
c) 12 sec
d) 15 sec
Question:- The mechanical equivalent of heat is dimensionless. Why?
a)What happens to the size of the hole on heating?
b)Write the changes n 1)Mass 2)Volume 3) Density 4) Diameter of the disc on heating
c) If we heat a metal ball insteadof the disc, out of above parameters, which one will undergoelargest percentage increase and which one the least?
Also please tell me which topic I should refer to study these
Water falls from a height of 500m. What is the rise in temp. of water at bottom if whole energy remains in the water?