CBSE > Class 11 > Physics | CBSE Board | Homework Help

Physics is the natural science that involves the study of matter and its motion and behavior through space and time, along with related concepts such as energy and force

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A cricket ball of mass 150g is moving with a speed of 12m/s . It is hit by a bit so that the ball is turned back with a speed of 20m/s. The force of the blow acts for 0.01 s. Find the average force exerted by the bat on the ball

Posted by Kunika Gil 8 years, 1 month ago

CBSE > Class 11 > Physics

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A cubical block of iron 5cm on each side is floating on mercury in a vessel 1 what is the height of the block above mercury level

Posted by Manav Parmar 8 years, 1 month ago

CBSE > Class 11 > Physics

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What is atm

Posted by Priyanshu Rajput 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Seema Chauhan 8 years, 1 month ago

ATM is a unit of pressure

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A cubical block of iron 5cm on each side is floating on mercury in a vessel 1) what is the height of the block above mercury level? 2) water is poured into vessel so that it just cover the iron block. What is the height of the water column? Given that density of mercury =13.6g/cm cube and density of iron =7.2g/cm cube

Posted by Manav Parmar 8 years, 1 month ago

CBSE > Class 11 > Physics

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What is centre of mass?

Posted by Vaibhav Srivastava 8 years, 1 month ago

CBSE > Class 11 > Physics

4 answers

Manjeet Singh 8 years, 1 month ago

The point of centre

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Shrawani Salila 8 years, 1 month ago

The point in the body at which the whole mass of the body is supposed to be concentrated

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Ashish Soni 8 years, 1 month ago

A particular point or mass of point on which the whole mass depends and all the external force will create effect on that point not on whole body due to which the body come in influence

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Lakie Chandola 8 years, 1 month ago

Com is that point where whole mass of body should be conserved

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What is mercuary barometer

Posted by Devesh Sahu 8 years, 1 month ago

CBSE > Class 11 > Physics

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what is youug modulus?

Posted by Aman Singh 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Ashish Soni 8 years, 1 month ago

Young's modulus is a measure of the ability of a material to withstand changes in length when under lengthwise tension or compression. Sometimes referred to as the modulus of elasticity, Young's modulus is equal to the longitudinal stress divided by the strain. Means the measure of the ability of an object which can bring some some changes in by due to compression or stress

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Explain why steel is more elastic than rubber

Posted by Shriyant Lodhi 8 years, 1 month ago

CBSE > Class 11 > Physics

4 answers

Reena Saifi 8 years, 1 month ago

Steel show more ductility properties than rubber that is why steel is more elastic than rubber.

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Lakie Chandola 8 years, 1 month ago

Because steel has more capacity of stress than rubber

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Ashish Soni 8 years, 1 month ago

Because steel has low stress than rubber or we can say steel has low ductility than rubber

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Aman Singh 8 years, 1 month ago

because steel has ductile property and rubber dont have it

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What is banking of road?

Posted by Heena Khan 8 years, 1 month ago

CBSE > Class 11 > Physics

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Ashish Soni 8 years, 1 month ago

Definition. The phenomenon of raising outer edge of the curved road above the inner edge is to provide necessary centripetal force to the vehicles to take a safer turn and the curved road is called Banking of Roads.

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Aman Singh 8 years, 1 month ago

it means to make road more thin at the corners of road

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Ineetia

Posted by Saif Saif 8 years, 1 month ago

CBSE > Class 11 > Physics

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Ashish Soni 8 years, 1 month ago

The property of an object to resists the change in the state of rest or motion of an object Or we can say that an object which is state of rest or motion it tends to remain in that motion unless an external force applied to it

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Two masses 10g and 20g are moving along the positive x-axis with velocity 20m/s and 40m/s respectively. Find the velocity of centre of mass.

Posted by Nischal Chettri 8 years, 1 month ago

CBSE > Class 11 > Physics

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Deduce the formula for pressure exerted by the liquid in terms of density, acceleration due to gravity and height of the object by the method of dimensional analysis. It is very URGENT!!!! PLZ REPLY SOON....

Posted by Pratap Dash 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Preeti Dahiya 8 years, 1 month ago

M^1L^-1T^-2

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Why the tension is zero in vertical circular motion?

Posted by Sonika Meena 8 years, 1 month ago

CBSE > Class 11 > Physics

3 answers

Ashish Soni 8 years, 1 month ago

Due to Thita

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Rajiv Sharma 8 years, 1 month ago

Because at highest point weight of the body cancelled the centripetal force acting outward

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Manjeet Singh 8 years, 1 month ago

The the tension will be zero only at highest point because at that point reference point and rotating point will be same

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Define newtons law of gravitation?

Posted by Abhi Gowda 8 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Sayan Debnath 8 years, 1 month ago

F=G×M×m/R2

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Rahul Kumar Sharma 8 years, 1 month ago

Newton law of gravitation between two bodies is directly propertional the product of magnitude of mass and inversly propertional to square of distance between them.....

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mgh =?

Posted by Aditya Verma 8 years, 1 month ago

CBSE > Class 11 > Physics

3 answers

Pika Pika 8 years, 1 month ago

Potential energy

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Deepanshu Dhakate 8 years, 1 month ago

Difference in potential energy

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Nikhil Malik 8 years, 1 month ago

Potential Energy

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What is thermodynamic

Posted by Manjeet Singh 8 years, 1 month ago

CBSE > Class 11 > Physics

6 answers

Pika Pika 8 years, 1 month ago

Transfer of heat different point

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Ashish Soni 8 years, 1 month ago

Thank u Reena ji

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Reena Saifi 8 years, 1 month ago

It is a branch of chemistry that deals with the study of heat,temperature and chemical reactions.?

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Manjeet Singh 8 years, 1 month ago

Priyanka your answer is as sweet as you so thank you

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Nikhil Malik 8 years, 1 month ago

Study of heat and temperature

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Dipanshu Bokade 8 years, 1 month ago

Thermodynamics is a branch of science which deals with the energy transfermation during the process or a reaction. It is a Greek word in which "thermos" means "heat" and "dynamics" means "flow"

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Mechanical energy of freely falling body

Posted by Surendra Karsh 8 years, 1 month ago

CBSE > Class 11 > Physics