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Metallurgy is defined as a process that is used for the extraction of metals in their pure form. The compounds of metals mixed with soil, limestone, sand, and rocks are known as minerals. Metals are commercially extracted from minerals at low cost and minimum effort. These minerals are known as ores. A substance which is added to the charge in the furnace to remove the gangue (impurities) is known as flux. Metallurgy deals with the process of purification of metals and the formation of alloys.
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Yogita Ingle 5 years, 8 months ago
In order to take a safe turn, the cyclist has to bend a little from his vertical position. In this case, a component of the reaction provides the required centripetal force.
If q is angle made by the cyclist with the vertical then
In actual practice, the value of q is slightly less because the force of friction also contributes towards the centripetal force.
Posted by Manish Kumar 5 years, 8 months ago
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The difference between the specific heat of a gas at constant pressure( cp ) and its specific heat at constant( cv ) volume is equal to the universal gas constant(R) divided by the molecular weight(M) of the gas. i.e. cp−cv = R/M .This relation is known as Mayer's formula
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Yogita Ingle 5 years, 8 months ago
The r.m.s. speed of the molecules of a gas is defined as the square root of the mean of the squared velocities of the molecules of a gas. No, r.m,s. speed is different from the average speed.
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In SI-units its value at the surface of the earth is 9.8 ms-2. It is a universal constant. It's value does not vary from place to place. In SI-units its value is 6.67 × 10-11Nm2kg-2.
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- they can be used to make star maps
- they can be used to study mysterious phenomena such as black holes and quasars
- they can be used to take pictures of the planets in the solar system
- they can be used to make maps of different planetary surfaces
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Yogita Ingle 5 years, 9 months ago
Zeroth Law of Thermodynamics
- Zeroth law of thermodynamics states that when two systems are in thermal equilibrium through a third system separately then they are in thermal equilibrium with each other also.
- Foreg: - Consider two systems A and B which are separated by an adiabatic wall. Heat flow happens between systems A and C, and between B and C, due to which all 3 systems attain thermal equilibrium.
- Zeroth Law of Thermodynamics suggested that there should be some physical quantity which should have same value for the system to be in thermal equilibrium.
- This physical quantity which determines whether system is in equilibrium or not is Temperature.
- Temperature is the quantity which determines whether the system is in thermal equilibrium with the neighbouring system.
- When the temperature becomes equal then the flow of heat stops.
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Alok Dewahe 5 years, 8 months ago
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