Is there some rotation too when a ball is slipping?

 

A solid sphere (A) of mass 5m and a spherical shell (B) of mass m, both having same radius, are placed on a rough surface. When a force of same magnitude is applied tangentially at the highest points of A and B, they start rolling without slipping with an acceleration of a and b, respectively. The ratio of a and b is?

 

The double-slit experiment to illustrates wave interference pattern, and diffraction.

 

The double-slit experiment primarily illustrates wave interference, though diffraction plays a critical role as the waves bend around each individual slit to overlap.

 When light or matter passes through two close slits, diffraction spreads the waves out, and they interfere to create an alternating pattern of bright and dark bands on a screen.

How the Two Concepts Work Together

Diffraction: Waves bend and spread out as they pass through each narrow slit.
Interference: The spread-out waves from both slits cross paths and overlap.
Constructive Interference: Waves meet in sync and make bright bands.
Destructive Interference: Waves meet out of sync and cancel out to make dark bands.








m = number of maximum
D= distance between screen and slits
d = seperation between the two slits
lambda = wavelength
y = is the gap between the maximum and the center



Here, the Green lines show the points of Constructive interference, hence a maximum i.e. a bright spot while the orange line shows the points where destructive interferance takes place and hence points of mimnimum i.e. dark spots.

If two bodies of mass 10kg and 7 kg hang on the two sides of a single pully, then what is the speed of the bodies and what is the net force acting on the axis of the pully?

 

What is 'Molecularity' in chemical kinetics? why it cannot be fractional? and how to calculate it from the balanced equation of a reaction?

 What is 'Molecularity' in chemical kinetics? 

 why it cannot be fractional?

how to calculate it from the balanced equation of a reaction?

In determinants matrix A and its inverse is A^-1, then A = 1/(A^-1)?

 

What are natural magnets and why do they have magnetic properties?

 Natural magnets are permanent magnets found in the earth's crust, such as lodestone (a magnetized form of the iron oxide mineral magnetite). They form naturally when deposits are exposed to intense magnetic fields—like the Earth's magnetic field over long periods or powerful natural events like lightning strikes. 

Why They Have Magnetic Properties

Electron Spin: Every atom has electrons that spin and create tiny magnetic fields.
Unpaired Electrons: In most materials, these magnetic fields cancel each other out. In magnetic materials like iron, many electrons point in the same direction.
Magnetic Domains: Atoms group into tiny regions called domains.
Alignment: In a natural magnet, these domains point in one uniform direction, creating a strong overall magnetic force.