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# Learn Unit 7-Properties of Bulk Matter with Free Lessons & Tips

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A steel wire of length 4.7 m and cross-sectional area 3.0 x 10-5 m2 stretches by the same amount as a... read more
A steel wire of length 4.7 m and cross-sectional area 3.0 x 10-5 m2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 x 10-5 m2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper? read less

. Two wires of diameter 0.25 cm, one made of steel and other made of brass are loaded as shown in figure.... read more
. Two wires of diameter 0.25 cm, one made of steel and other made of brass are loaded as shown in figure. The unloaded length of steel wire is 1.5 m and that of brass wire is 1.0 m.Young’s modulus of steel is 2.0 x 1011 Pa. Compute the elongations of steel and brass wires. (1 Pa = 1 N m2). read less

The edge of an aluminium cube is 10 cm long. One face of the cube is firmly fixed to a vertical wall.... read more
The edge of an aluminium cube is 10 cm long. One face of the cube is firmly fixed to a vertical wall. A mass of 100 kg is then attached to the opposite face of the cube. The shear modulus of aluminium is 25 GPa. What is the vertical deflection of this face? read less

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Toricelli s barometer used mercury. Pascal duplicated it using French wine of density 984 kg m-3. Determine... read more
Toricelli’s barometer used mercury. Pascal duplicated it using French wine of density 984 kg m-3. Determine the height of the wine column for normal atmospheric pressure. read less

A vertical off-shore structure is built to withstand a maximum stress of 109 Pa. Is the structure suitable... read more
A vertical off-shore structure is built to withstand a maximum stress of 109 Pa. Is the structure suitable for putting up on top of an oil well in the ocean? Take the depth of the ocean to be roughly 3 km, and ignore ocean currents. read less

A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section... read more
A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm2. What maximum pressure would the smaller piston have to bear? read less

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Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation... read more
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 ? read less

The-electrical resistance in ohms of a certain thermometer varies with temperature according to the approximate... read more
The-electrical resistance in ohms of a certain thermometer varies with temperature according to the approximate law: R = R0 [1 + α (T – T0)].The resistances is 101.6 Ωat the triple-point of water 273.16 K, and 165.5 Ωat the normal melting point of lead (600.5 K). What is the temperature when the resistance is 123.4 Ω ? read less

The triple-point of water is a standard fixed point in modem thermometry. Why ? What is wrong in taking... read more
The triple-point of water is a standard fixed point in modem thermometry. Why ? What is wrong in taking the melting point of ice and the boiling point of water as standard fixed points (as was originally done in the Celsius scale) ? read less

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There were two fixed points in the original Celsius scale as mentioned above which were assigned the... read more
There were two fixed points in the original Celsius scale as mentioned above which were assigned the number 0 °C and 100 °C respectively. On the absolute scale, one of the fixed points is the triple-point of water, which on the Kelvin absolute scale is assigned the number 273.16 K. What is the other fixed point on this (Kelvin) Scale ? read less

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