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What is reynolds law

Posted by Prabhjot Singh 2 years, 10 months ago

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an accurate celsius and fahrenheit thermometer are put in the oil bath. the reading on fahrenheit is 3/2 times of reading on celsius scale . what is temp of both on celsius and fahrenheit and calvin cycle

Posted by Soniya Rana 2 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Jeenal Joshi 2 years, 10 months ago

solve equation by oxidation number method : p4 + no3^-1 gives po4^-3 + no2 oxidation no of p4 is 0, no3^-1 is 5, po4^-3 is 5 & no2 is 4 oxidation: p4 gives 4po4^-3 increases by 20 × 1 reduction :no3^-1 gives no2 decreases by 1 × 20 p4 gives 4po4^-3 20no3^-1 gives 20no2 p4 + 16h2o gives 4po4^-3 20no3^-1 gives 20no2 + 20h2o balanced equation is p4 + 20no3^-1 + 8h+ gives 4po4^-3 + 20no2 + 4h2o

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Can we design an artificial limb which is lighter but stronger

Posted by T.Bhavya Sri 2 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Ankit ............ 2 years, 10 months ago

Material such as modern plastic have yielded prosthetic devices that strong but more lightweight then earlier limbs made of iron and wood . New plastic better pigment and more sophisticated procedures are responsible for creating realistic looking skin.

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Show that the path followed by a projectile is a parabolic

Posted by Rajkumari Kajal Devi 2 years, 10 months ago

CBSE > Class 11 > Physics

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Explain the consequences of high specific heat of water

Posted by Devansh Jangra 2 years, 10 months ago

CBSE > Class 11 > Physics

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Prove that the ratio of constant of linear expansion, areal expansion and volume expansion is 1:2:3

Posted by Kavya Kumar 2 years, 10 months ago

CBSE > Class 11 > Physics

3 answers

Prince Saini 2 years, 10 months ago

We know that γ=3α and β=2α ⟹ α:β:γ=1:2:3

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Anuj Yadav 2 years, 10 months ago

Co-efficient of lineas expansion = d Co-lefficient of area sigma*n = beta co-efficient of Volume expansion : 8 ? We know, beta = 2alpha y = 3alpha .. Therefore ration of d: B: 8 21:2:3

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Anuj Yadav 2 years, 10 months ago

We know that γ=3α and β=2α ⟹ α:β:γ=1:2:3

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State Hooke’s law. Deduce expression for young’s modulus of material of a wire of length ‘l’, radius of cross-section ‘r’ loaded with a body of mass M producing an extension ∆l in it.

Posted by Dallia Jamatia 2 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Prabhjot Kaur 2 years, 9 months ago

Hooke's law states that stress is directly proportional to strain Y= F.L/A.∆L

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The speed of a travelling wave important points

Posted by Neha Dabhade 2 years, 10 months ago

CBSE > Class 11 > Physics

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Thermal conductivity

Posted by Mazarello Marak 2 years, 10 months ago

CBSE > Class 11 > Physics

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?Shreya.Kamalakar✔️ Naik 2 years, 9 months ago

Ability of the conductor to conduct heat through it is called as Thermal Conductivity✓

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Pani ko garam krna kon si kriya hai

Posted by Shubham Gupta 2 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Avinash Singh Shekhawat 2 years, 10 months ago

Heat energy work done

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Kinetic theory all formules

Posted by Neha Dabhade 2 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Neha Dabhade 2 years, 10 months ago

Thanks

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Avinash Singh Shekhawat 2 years, 10 months ago

1/2 mv^2

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Define Newton's second law of motion?

Posted by Jayanti Harijan 2 years, 10 months ago

CBSE > Class 11 > Physics

3 answers

Hitesh Rajput 2 years, 10 months ago

rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it Basically this law gives you this equation : F = ma where, F is force, m is mass and a is acceleration.

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Srijanabh Bharadwaj 2 years, 10 months ago

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Shivangi Tripathi 2 years, 10 months ago

the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it Basically this law gives you this equation : F = ma where, F is force, m is mass and a is acceleration.

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Define Newton's second law of motion .Derive mathematically form of force with its unit

Posted by Jayanti Harijan 2 years, 10 months ago

CBSE > Class 11 > Physics

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Why hot soup is tastier than cold one ??

Posted by Krishna Rajput. 2 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Deepak Kumar Meena 2 years, 7 months ago

Due to diffusion .

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Saurav Singh 2 years, 10 months ago

Because their molecules are fastly diffuse in air hence the soup is fresh and whereas coldone is not

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How does Bernoulli's principle helps in explaining cyclone

Posted by Snekha Sundaran 2 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 2 years, 10 months ago

Bernoulli’s Principle states that the pressure exerted by a fluid decreases as its velocity increases. As the velocity of a fluid (or air in our case) increases, the pressure decreases so the static air inside the house has a higher pressure than the fast moving air outside, creating a pressure difference. As the wind speed increases, the pressure difference between the inside and outside of the house (area above the roof) gets larger until it reaches a point where the pressure difference is sufficiently large enough to “pop” the roof off the top of the house. This is the reason why cyclones are able to swipe off the roof of a house due to its structure.

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How do Bernoulli's principle helps in explaining dynamic lift?

Posted by Snekha Sundaran 2 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 2 years, 10 months ago

In the case of a clockwise spinning ball, the relative velocity of air with respect to the ball would be GREATER (velocities are antiparallel) than that below the ball. As a result, as per the Bernoulli's principle (P ~ 1/V), pressure below would be GREATER than pressure above the ball. Consequently, the ball shows a slight deflection in its path towards the upper direction (passive movements occur from high pressure to low pressure). This phenomenon of deviation is known as DYNAMIC LIFT.

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Operation on a litre of water

Posted by Jayant Bansal 2 years, 10 months ago

CBSE > Class 11 > Physics

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What is Pascal law and it's use

Posted by Abhishek Negi 2 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 2 years, 10 months ago

Pascal's law states that if the pressure is applied on fluids that are confined within an enclosed medium, the fluids would then transmit the same pressure in all directions at the same rate, provided temperature and density remains constant throughout. The same principle is used in case of Hydraulic lift, Toricelli's barometer and in case of Hydraulic brake system provided in vehicles.

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Two stones are thrown at 60° with the vertical simultaneously from the edge of a cliff 300 m high with initial speeds 10m/s & 20 m/s , what is the difference in their time of maximum heights, is their relative distance time variation curved or linear. Consider g =10m/s²

Posted by Pradnya Moghe 2 years, 10 months ago

CBSE > Class 11 > Physics

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Young Modulus is inversely proportional to root of diameter. Why??

Posted by ☺️☺️ ☺️☺️ 2 years, 11 months ago

CBSE > Class 11 > Physics

2 answers

☺️☺️ ☺️☺️ 2 years, 11 months ago

Thanks

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Anjan Karthi 2 years, 11 months ago

Take a simple practical example. Take a cardboard block or anything cuboidal in shape like that you have. Try to bend the block at two opposite rectangular faces of the cuboid. It is easy. But, try so taking the other two rectangular faces. If we assume that the distance between the first two faces is LESS than the last two rectangular faces then it is gonna be even more difficult. If we replace it with a cylinder, the thickness or the interface distance would become the diameter. As Young's Modulus is directly proportional to easiness in bending or changing configuration and bringing it back to original, and this bending property is inversely proportional to thickness, Young's Modulus is inversely proportional to root of diameter or simply, diameter.

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The speed of water at x is 30 cm per second.find the speed of water at y, if difference in heights of two columns of water is 2 cm.

Posted by Arvit Singh Arvit Singh 2 years, 11 months ago

CBSE > Class 11 > Physics

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To study the conservation of energy of a ball rolling down on an inclined plane

Posted by Ranringpeimi Rainam 2 years, 11 months ago

CBSE > Class 11 > Physics

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What is Poisson s ratio

Posted by ☺️☺️ ☺️☺️ 2 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Roshan Kumar 2 years, 11 months ago

Poisson's ratio is the ratio of lateral strain to the longitudinal strain. It has no units.

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Dimensions for angle

Posted by ☺️☺️ ☺️☺️ 2 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Roshan Kumar 2 years, 11 months ago

Dimension less quantity

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What is linear velocity profile?

Posted by Snekha Sundaran 2 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Roshan Kumar 2 years, 11 months ago

It turns out (we will prove this at a later date) that the velocity profile, u(y) is linear, i.e. u(y) = Vy/h. ... In a simple 2-D shear flow such as this, the shear stress is directly proportional to the slope of the velocity profile. In fact, the constant of proportionality is the coefficient of viscosity itself!

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If y=sinX, then dy/dx

Posted by Riya Roy 2 years, 11 months ago

CBSE > Class 11 > Physics

3 answers

Sudeep Singh 2 years, 11 months ago

Dy/Dx = CosX

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D S 2 years, 11 months ago

Cos x

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Gaurav Agarwal 2 years, 11 months ago

dy/dx = CosX

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Difference between stress and strain?

Posted by Snekha Sundaran 2 years, 11 months ago

CBSE > Class 11 > Physics

2 answers

Anjan Karthi 2 years, 11 months ago

Stress is the restoring force coming from within an elastic object acting per unit area of the object. Whereas, strain is the change in the physical arrangement or the configuration in an elastic object when it is subjected to external force.

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Vaghela Rahul 2 years, 11 months ago

The stress strain graphs for material A and B are shown

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In a figure particle moves along a circular path of radius r . It starts from point A and moves anticlockwise. Find the distance traveled by the particle as it moves from A to B

Posted by Uma Shree 2 years, 11 months ago

CBSE > Class 11 > Physics