9th, Physics

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Roller Coaster Physics, A 30-g car rolls from a hill 12 cm high and is trav...

A 30-g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the momentum of the car?

What is relative velocity?, When you are talking about relative velocity of...

When you are talking about relative velocity of A with respect B then it''s like you are observing the motion of A while standing on B. That is, with respect to you, B is at rest.

Ray of light in air and flat piece of glass, A ray of light in air is occur...

A ray of light in air is occurrence upon a flat piece of glass. How acts the path that the light travels along when it is in the glass compare with the path in the air?

Concept of wave front , Concept of wave front  The basis of Huygens ...

Concept of wave front  The basis of Huygens wave theory of light is his principle concerning construction of wave front. When a disturbance from a light source travels i

Rectangular coordinate system, A negative point charge of 10 -6 coulomb is...

A negative point charge of 10 -6 coulomb is located in air at the origin of a rectangular coordinate system. A second negative point charge of 10 -4 is situated on the positive x

Define modulus of elasticity, According to Hooke's law, within elastic limi...

According to Hooke's law, within elastic limit,  stress  strain or            stress  = E Χ strain              or    Stress / Strain= E = a constant, Where E is called a

What is the focal length of a convex lens, Q. What is the focal length of a...

Q. What is the focal length of a convex lens of focal length 30 cm in contact with a Concave lens of focal length 20 cm ? Is the system a converging or a diverging lens? Ignore

Evaluate the uniform speed of gondola, Evaluate  the uniform speed of gond...

Evaluate  the uniform speed of gondola? Q. The world's largest ferris wheel with a radius of 50.0 m is located in Yokohama City, Japan. Each of the sixty gondolas on the wheel t

Why we feel sky blue in color, Why we feel sky blue in color?  The blu...

Why we feel sky blue in color?  The blue color of the sky is because of Rayleigh scattering. As light moves by the atmosphere, most of the longer wavelengths pass straight thr

Frequency dependence of dielectric constant, E lectrons have very much smal...

E lectrons have very much smaller mass than that of ions, so they respond more rapidly to a changing electric field. For electric field that oscillates at extremely high frequencie

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