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The branch of science and technology concerned with the properties of metals and their extraction, production and purification, is known as Metallurgy.

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Yogita Ingle 6 years, 1 month ago

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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The length of a simple pendulum is increased by 45% what is the inrease in its time period (a) 44% (b)10% (c) 20% (d)√44%

Posted by Knowledge Time 6 years, 1 month ago

CBSE > Class 11 > Physics

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Jiya Arora????? 6 years, 1 month ago

Approx 10%

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Two engine pass through each other in opposite direction with a velocity of 60 km per hour each one of them is emitting a sound of frequency 540 Hz. Calculate the frequency head by the other engine before and after they cross each Other. Velocity of sound=316m/sec

Posted by Abhishek Singla 6 years, 1 month ago

CBSE > Class 11 > Physics

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The pilot takes 300 passengers in a trip. he reaches airpot safely within 30min.what is the age of the pilot

Posted by Dr Aysha 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sudhanshu Sharma 6 years, 1 month ago

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prove that the adiabatic elasticity of the gas is equal to gama into p where p is the pressure of the gas and gamma is equal to CP by CV CP and CV being the specific heats of the gas at constant pressure and constant volume respectively

Posted by Atul Pal 6 years, 1 month ago

CBSE > Class 11 > Physics

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What is std flow

Posted by Harsh Patel 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Kine Buddy 6 years, 1 month ago

Idk

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Bending of cyclist

Posted by Samar Khan 6 years, 1 month ago

CBSE > Class 11 > Physics

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Yogita Ingle 6 years, 1 month 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.

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What is Mayer's formula

Posted by Manish Kumar 6 years, 1 month ago

CBSE > Class 11 > Physics

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Jiya Arora????? 6 years, 1 month ago

It's simple relation between cp cv and R

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Devashish Kasana 6 years, 1 month ago

Cp-cv=r is mayors formula

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Anuj Soni 6 years, 1 month ago

When Hydrogen and nitrogen react with each other to form ammonia. This process called mayers formula

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Yogita Ingle 6 years, 1 month ago

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. c_p−c_v= R/M .This relation is known as Mayer's formula

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What RMS speed ?

Posted by Pratik Chaurasia 6 years, 1 month ago

CBSE > Class 11 > Physics

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Yogita Ingle 6 years, 1 month 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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Drive an expression for pressure exerted by a soap bubble.

Posted by Riya Bharti 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Jiya Arora????? 6 years, 1 month ago

The expression is 4s/R

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What is escaped speed

Posted by Abhishek Singh 6 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Anuj Soni 6 years, 1 month ago

Maximum speed required by an object to throw out of the earth atmosphere is called escape speed

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Aayushi Attri 6 years, 1 month ago

Maximum speed required by satellite to go outside the earth's atmosphere

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Define simple pendulum

Posted by Arif Khan 6 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Jiya Arora????? 6 years, 1 month ago

Simple pendulum is the object which have a weightless point object tied on a inextendible thread

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Harshit Aggarwal 6 years, 1 month ago

Simple pendulum can be defined as a pendulum which is simple

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Define heat engine

Posted by Arif Khan 6 years, 1 month ago

CBSE > Class 11 > Physics

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What is strain and stress

Posted by Utkarsh Madhesiya 6 years, 1 month ago

CBSE > Class 11 > Physics

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Aditi Chaudhary 6 years, 1 month ago

The internal restoring force acting per unit area of a body is called stress..... The change in configuration to original configuration is called strain

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A wheel is making revolutions about its axis with uniform angular acceleration. Starting from rest, it reaches 100 rev/sec in 4 seconds. Find the angular acceleration. Find the angular acceleration . Find the angle during these four seconds.

Posted by Sneh Srivastava 6 years, 1 month ago

CBSE > Class 11 > Physics

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What is the nature of intermolecular force.

Posted by Abhishek Singh 6 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Harshit Aggarwal 6 years, 1 month ago

Strong in nature

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Raman Pandey 6 years, 1 month ago

Every molecules attract each other that attractive force is known as intermolecular force

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What is unit of gravity on earth

Posted by Munsiram Ram 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 1 month ago

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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Physics is a ............ Science.

Posted by Mansha Madaan 6 years, 1 month ago

CBSE > Class 11 > Physics

5 answers

Harshit Aggarwal 6 years, 1 month ago

Branch of science which deals with natural

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Utkarsh Madhesiya 6 years, 1 month ago

Branch of

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Appurvi Garg 6 years, 1 month ago

Branch of

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Vaibhav Singh 6 years, 1 month ago

Natural

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Sai More 6 years, 1 month ago

branch of

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what are the important questions of physics to pass in final exam

Posted by Yrs Vlogs 6 years, 1 month ago

CBSE > Class 11 > Physics

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Shivam Dangwal 6 years, 1 month ago

Visit @ https://www.youtube.com/channel/UCxdF11QbKfQUYXAF2qca-jA. Where i will upload soon

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Important uses of satellite

Posted by Suman Sharma 6 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Vansh Prajapati 6 years, 1 month ago

Thanx ma'am

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Yogita Ingle 6 years, 1 month ago

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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What are zeroth Law explain

Posted by Karam Husain 6 years, 1 month ago

CBSE > Class 11 > Physics

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Yogita Ingle 6 years, 1 month 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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2018 cbse final question paper

Posted by Aman Cheema 6 years, 1 month ago

CBSE > Class 11 > Physics

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Effect of altitude

Posted by Suman Sharma 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Prabh Singh 6 years, 1 month ago

Acceleration due to gravity decreases with increase in height or altitude or we can say 'g' is inversely proportional to altitude. Percentage of decrease is 2h/R ×100 where h is height upto which object is taken and R is radius of earth.

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Express Newton's law of cooling mathematically

Posted by Aadharsh Aadharsh 6 years, 1 month ago

CBSE > Class 11 > Physics

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Expression for the orbital velocity

Posted by Jashan Deep Kaur 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Knowledge Time 6 years, 1 month ago

V=√2Gm/R+h

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What is the difference between wave velocity and phase velocity

Posted by Deeksha Baranwal 4 years, 9 months ago

CBSE > Class 11 > Physics

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Sia ? 4 years, 9 months ago

Wave velocity, when not otherwise specified, usually means the phase velocity: the rate at which the phase travels in space. So if the context implies that the wave is carrying energy, the wave velocity is also the group velocity. In a dispersionless media group and phase velocity are the same.

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Why we read about thermodynamics in physics

Posted by Shree Singh 6 years, 1 month ago

CBSE > Class 11 > Physics