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What type of wave during under exploision under water

Posted by Diwakar Kumar 7 years ago

CBSE > Class 11 > Physics

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What type of wave during exploision under water

Posted by Diwakar Kumar 7 years ago

CBSE > Class 11 > Physics

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A stone is dropped from a tower and is found to travel 44.1m in the last second before it reaches the ground.find the height of the tower

Posted by Asish Padhi 7 years ago

CBSE > Class 11 > Physics

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What is the si unit of power

Posted by Deepak Kumar 7 years ago

CBSE > Class 11 > Physics

1 answers

Ilma Ali 7 years ago

Watt

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Orthogonal and coplanar and localised vector

Posted by Sejalpreetkaur Heer 7 years ago

CBSE > Class 11 > Physics

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Explain gravitational potential at a point in gravitational field . Give relation between gravitational field intensity and gravitational potential

Posted by Jairam Yadav 7 years ago

CBSE > Class 11 > Physics

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Define Angle of friction

Posted by Shubham Gupta 7 years ago

CBSE > Class 11 > Physics

1 answers

Nancy Rajput 7 years ago

The angle of friction between any two surfaces in contact is defined as the angle which the resultant of the force of limiting friction F and normal reaction R makes with the direction of normal reaction R. It is represented by θ.

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A liquid is being converted into steam at its boiling point what will be specific heat of liquid at this time

Posted by Vista Kumar 7 years ago

CBSE > Class 11 > Physics

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A disc of radius 2root2m is rotating about it own axis .Calculate its radius of gyaration..

Posted by Arpit Kushwaha 7 years ago

CBSE > Class 11 > Physics

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State in detail , Newton law of cooling?

Posted by Karpa Singh 7 years ago

CBSE > Class 11 > Physics

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Derive equation of continuity

Posted by Aarti Kumari 7 years ago

CBSE > Class 11 > Physics

1 answers

Nancy Rajput 7 years ago

a steady flow process - flow where the flow rate do not change over time - through a control volume where the stored mass in the control volume do not change - implements that inflow equals outflow This statement is called the Equation of Continuity. Common application where the Equation of Continuity are used are pipes, tubes and ducts with flowing fluids or gases, rivers, overall processes as power plants, diaries, logistics in general, roads, computer networks and semiconductor technology and more. The Equation of Continuity and can be expressed as: m = ρi1 vi1 Ai1 + ρi2 vi2 Ai2 +..+ ρin vin Aim = ρo1 vo1 Ao1 + ρo2 vo2 Ao2 +..+ ρom vom Aom (1) where m = mass flow rate (kg/s) ρ = density (kg/m3) v = speed (m/s) A = area (m2) With uniform density equation (1) can be modified to q = vi1 Ai1 + vi2 Ai2 +..+ vin Aim = vo1 Ao1 + vo2 Ao2 +..+ vom Aom (2) where q = flow rate (m3/s) ρi1 = ρi2 = . . = ρin = ρo1 = ρo2 = . .= ρom.

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What is the basic condition for the motion of a particle to. Be s.h.m

Posted by Kàmàljëèt Gupta 7 years ago

CBSE > Class 11 > Physics

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Prasanna Acharya 7 years ago

The acceleration of the body should be directly proportional to displacement from the fixed position or mean position and should be directed to that point i.e.a α y or,a=-ky

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Abc ?⏳ 7 years ago

Acceleration is directly proportional to -ve of displacement

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What is null vector

Posted by Pankaj Kumar 5 years, 11 months ago

CBSE > Class 11 > Physics

2 answers

Isha Chandra 7 years ago

Sorry, it's 0

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Isha Chandra 7 years ago

Vector whose magnitude is 0n

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Height needed by the body inside the liquid coloumn to overflow

Posted by Logeshraj S.M 5 years, 11 months ago

CBSE > Class 11 > Physics

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The time of revolution around the earth of communication satellite INSAT-11B is

Posted by Shivam Mutreja 7 years ago

CBSE > Class 11 > Physics

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Convert 1 kwh in joule

Posted by Shivam Singh 7 years ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 7 years ago

1kWh = 1 kilowatt × 1 hour
= 1000 watt × 3600 s
= 3.6 × 10⁶ J

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will the momentum remain constant if some external force acts on the system?

Posted by Mohd. Shadab 7 years ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 7 years ago

If an external force is acted on a body to move it, the body accelerates. So the momentum cannot be a constant.
But, if the force cannot make a body to move like push of a boy on a wall, The body remains at rest and the momentum of the body remains zero.

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Define fraction point

Posted by Adarsh Adarsh 7 years ago

CBSE > Class 11 > Physics

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Shreya Dixit 7 years ago

A point in which any material is break down and its elasticity is completely end

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What does newton's first law tell?

Posted by Garima Singh 7 years ago

CBSE > Class 11 > Physics

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Aman Kumar 7 years ago

According to Newton's first law =>Each an every object in the universe, remains in its state of rest or motion ,untill and unless some external force is applied on it.

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Reletion btween G and g

Posted by Nitish Kushwaha 7 years ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 7 years ago

G stands for Newton's universal gravitational constant, whereas g stands for the acceleration due to gravity at a certain point.
G = 6.67300 × 10^-11 N.m^2.kg^-2. G is a constant throughout space and time.
g = 9.8 m.s^-2. g is a variable quantity.
G is a scalar quantity whereas g is a vector qualtity.

(According to Newton's law of universal gravitation the force of attraction between two bodies is given by F = GMm/r², where the symbols stand for their usual well known meanings. Also the weight of a body of mass m is F = mg.
So mg = GMm/r²,
or g = GM/r²
g is a constant at a given location, which depends upon M and r.)

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A train of its first half journany with speed 40m/s and other half journay with speed 60m/s . What is the average speed?

Posted by Vinamrata Kumari 7 years ago

CBSE > Class 11 > Physics

2 answers

Nitish Mahto 7 years ago

48m/s

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Shubham Yadav 7 years ago

50m/s

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Why Cp>CV?

Posted by Than Ji 7 years ago

CBSE > Class 11 > Physics

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vehicle is moving on a circular road of radius R that has been banked at an angle Obtain a formula for the maximum safe speed of the car. It is given that the coefficient of static friction, between the car wheels and the road, is u Draw a graph, showing the dependence of the maximum(safe) speed on Vtan6, when u, 0.

Posted by Shrikant Jaiswal 7 years ago

CBSE > Class 11 > Physics

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When an air bubble rises in water what happens to its potential energy?

Posted by Kalpana Thejkumar 7 years ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 7 years ago

Potential energy of air bubble decreases, because work is done by upthrust on the bubble.
work done = - (change in potential energy )
here bubble rise due to net force(buoyancy force , gravitational force, drag force which is negligible) so work done by this net force is positive since force and displacement is in the same direction. so change in P.E. is negative, this means potential energy is decreasing

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Derive the expression for resultant of two vectors A and B which are inclined to each other at an angle

Posted by Priyanka Kumari 7 years ago

CBSE > Class 11 > Physics

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A pan filled with hot food cools from 94°C to 86°C in 2 min when the room temperature is at 20°C. How long will it take to cool from 71°C to 69°C

Posted by Akhila K S English 7 years ago

CBSE > Class 11 > Physics

1 answers

Debasis Choudhury 7 years ago

Use the formula (t2-t1)/time=k[t(mean)-t(surrounding)] 'k' &'t(surrounding)' will remain same for a particular object ATQ, 1st case , t(mean)= (94+86)/2=90°C So,(94-86)/2=k[90-20] or, 4=70k or,k=2/35 2nd case,use k=2/35 t(mean)=(71+69)/2 =70°C So,(71-69)/time=(2/35)[70-20] or, time=0.7min or,. time=42seconds ✓

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Dimension of viscosity

Posted by Shweta Bisht 7 years ago

CBSE > Class 11 > Physics

2 answers

Aman Kumar 7 years ago

ML^-1T^-1

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Sanjay Rawat 7 years ago

M/LT= ML-1T-1

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What is the relation between areal magnification and linear magnification

Posted by Tripti Choudhary 7 years ago

CBSE > Class 11 > Physics

1 answers

Isha Chandra 7 years ago

M(areal)=square of M (linear)

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Find the relation between surface energy and surface tension

Posted by Laveesha Sharma 7 years ago

CBSE > Class 11 > Physics

1 answers

Abdul Majid 7 years ago

Relation between surface energy and surface tension is given by dE=T(dA) Where, E=surface energy. T=surface tension. dA=change in surface area.....???????

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Formula of volume of irregular lamina

Posted by Yakshi Baliyan 7 years ago

CBSE > Class 11 > Physics