Notes, abstracts, papers, exams and problems of Physics

sound: pessure waves produced when an object vibratesat a frequency between 20 Hz and 20000 Hz and there is a material medium that sound can travel through.

HEISENBERG’S UNCERTAINTY PRINCIPLE:

• This principle was in favor of the wave nature of matter
• It stated that it is impossible to simultaneously evaluate the precise position and momentum of particle. There is always some probability in predicting the position and momentum of a particle. Mathematically, it can be written as:

                   (Δx)(Δp) ≥ h/(2π)

Considering the above equation, 2 cases are possible:

• Case-1- If precise momentum(p) of an electron is known, then its wavelength by De Broglie’s hypothesis will be constant:

              λ = h/p

It means that the wavelength has a fixed value and the wave is extended infinitely throughout the wave. Hence, it is impossible to find the position of the wave.

Mathematically,... Continue reading "Latitude of the position" »

Shrinkage Reducing Admixture  “product or product residue may explosively Combust…” • Superplasticizer  Kills fish and ruins water – never pour down a Drain! • Colloidal Silver  “…known to cause birth defects…” • Silver Nitrate Solution  A poison, oxidizer, and corrosive!

MODERNISM (1920-1935) -Fragmentation as a reaction against classical patterns, conventions and tradition.It started before WWI, but it wasn't until afterwards that it developed. -Anti-historicist, rejects sequential time (non-cronological), absolute polarities and the division between past and present (simultaneity). -Elitist: a certain level of knowledge is required to understand this movement. -Cultural despair: society expected changes after WWI, but this didn’t happen and they are in chaos and despair, afraid of the unknown (repetitive and nightmarish circumstances). -Moral relativism: each person judges what is moral or not, there is not any absolute value. -It portrays the impact of technology: a mechanical movement will establish a... Continue reading "Edwardian literature" »

Biomechanics: Application of mechanical principles in the study of living organisms. Kinematics: appearance or description of motion, linear kinetics, angular kinematics. Kinetics: Forces that cause motion, linear kinetics, angular kinetics. Statics: mechanics of objects moving at constant velocity. Dynamics: mechanics of objects in accelerated motion(changing) Qualitative: non numeric description based on observ Quantative: numeric description based on data collected

Force: A push or pull applied, Effect that one body has on another, is a vector quantity wit magnitude and direction, and point of application. Produces motion Internal force:act within the object hold together when acted by external forces. External force: Act on an object as... Continue reading ""average velocity vector" speed "average speed" pdf acceleration" »

Example 2 Find parametric equations for a particle that starts at (0, 3, 0) and moves around a circle as shown
in Figure 17.1.
: Circle of radius 3 in the yz-plane, centered at origin
Solution Since the motion is in the yz-plane, we have x = 0 at all times t. Looking at the yz-plane from the
positive x-direction we see motion around a circle of radius 3 in the clockwise direction. Thus,
x = 0, y= 3cost, z = -3 sint.

Example 3 Describe in words the motion given parametrically by
x = cost, y = sint, z = t.
Solution The particles x- and y-coordinates give circular motion in the xy-plane, while the z-coordinate
increases steadily. Thus, the particle traces out a rising spiral, like a coiled spring. (See Figure 17.2.)
This curve is called a helix.

Figure 17.... Continue reading "Why is indifference curve generally curve to the point of origin" »

FORCE-influence that can deform a body or change its movement,or produce motion in a body at rest

Quoting: repeat another source word for word, using quotation marks.