corresponding antiparticle are annihilated (for example‚ electron-positron annihilation). In empty space‚ the photon moves at c (the speed of light) and its energy and momentum are related by E = pc‚ where p is the magnitude of the momentum vector p. This derives from the following relativistic relation‚ with m = 0:[15] The energy and momentum of a photon depend only on its frequency (ν) or inversely‚ its wavelength (λ): where k is the wave vector (where the wave number k = |k| = 2π/λ)‚ ω = 2πν is the
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WHAT IS TORQUE? Torque is a measure of how much a force acting on an object causes that object to rotate. The object rotates about an axis‚ which we will call the pivot point‚ and will label ’O ’. We will call the force ’F ’. The distance from the pivot point to the point where the force acts is called the moment arm‚ and is denoted by ’r ’. Note that this distance‚ ’r ’‚ is also a vector‚ and points from the axis of rotation to the point where the force acts. (Refer to Figure 1 for a pictoral
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works but the physics of it as well. I will be discussing what I learned as well as the physics and the physics of the bullet as well when shot up in air. Some topics that I did not know that dealt with shooting a gun are friction‚ force‚ conservation of momentum (which helps characterize an object ’s resistance to change in motion)‚ velocity‚ kinetic energy‚ transfer of energy‚ gravity‚ heat engines‚ kinematics (analyzes the positions and motions of objects as a function of time)‚ sound‚ and projectile
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bodies‚ and free vibration of single degree of freedom mechanical systems. The three immediate learning objectives of this subject are: Understanding basic mechanics concepts such as rigid body‚ force‚ motion‚ work‚ energy‚ power‚ impulse and momentum‚ and the relationships between them; Gaining skills in
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chemistry of the conservation of angular momentum. When a person enters the spin with extended arms‚ the overall energy of their body has to move their hands and arms in large circles. As they pull their arms in‚ there is just as much energy as there was before. To conserve energy‚ the whole body moves faster. In the conservation of momentum‚ electron spin as well‚ and if they do it in pairs‚ they generally cancel out. Unpaired electrons determine the ‘value’ of angular momentum for any given molecule
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and Angular Momentum In this chapter we will cover the following topics: -Rolling of circular objects and its relationship with friction -Redefinition of torque as a vector to describe rotational problems that are more complicated than the rotation of a rigid body about a fixed axis -Angular momentum of single particles and systems of particles -Newton’s second law for rotational motion -Conservation of angular momentum -Applications of the conservation of angular momentum (11-1) t1
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LAWS OF PHYSICS ON A MOUSETRAP POWERED CAR ¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬___________________________________ An Investigatory Project Presented to the Faculty of St. Mary’s Academy of Guiuan (Formerly Assumption Academy of Samar) Guiuan‚ Eastern Samar ____________________________________ In Partial Fulfilment of the Requirements for the Course Science and Technology 4 (Physics) ______________________________________ by FRANCES JOSIE P. GILBER JULIENNE I. SANTOS MARY ROSE T. ELLES Researchers
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According to the law of conservation of angular momentum if there is no unbalanced external torque acting on a rotating system‚ then the angular momentum of that system remains constant. This means that with no net change in external torque‚ the product of rotational inertia and rotational velocity at one time will be the same as at any other time. If the polar ice caps where to melt and the depth of the world’s oceans increased by 30m the mass of the polar ice caps would no longer be at the earth’s
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watch is wound. What form of potential energy is involved in winding a pocket watch? 7. An object is lowered into a deep hole in the ground. How does the potential energy of the object change? 8. Write an equation that expresses the conservation of mechanical energy in a system where the only forms of mechanical energy are kinetic energy and gravitational potential energy. 9. A pendulum is raised 1.5 cm and allowed to fall. If air resistance is negligible‚ how high will the pendulum
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sound easy‚ but it’s a lot harder than it seems. Just getting it to go that far is like “pitching a cotton ball at major league speeds.” The design of the rods makes this almost impossible task a little easier. The key is momentum. Momentum is the mass multiplied by the velocity‚ so when the rod gets smaller
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