In contrast, black sand is a regular magnetic solid. Surprisingly, both ferrofluid and black sand are made of magnetite! The difference in their behavior is due to size. Ferrofluid is made of tiny, nanometer-sized particles of coated magnetite suspended in liquid. When there’s no magnet around, ferrofluid acts like a liquid.
Roller coasters Part 1: Research and collecting secondary data What are the main energy transfers that happen as a “car” travels along the track from the start of the ride to the end? The main energy transfers are between gravitational potential energy (GPE) and kinetic energy (KE) , and the eventual decrease of mechanical energy as it transforms into thermal energy. Roller coasters often start as a chain and motor exercises a force on the car to lift it up to the top of a very tall hill . At this height, GPE is at its highest , as we can see through the formula: GPE = mass x gravitational field strength x height  (for all physics in relation to Earth, take g to be 10 m/s2 or 10 N/kg) We can see through this formula that as the height increases, so does the GPE, which will then be converted into KE, or kinetic energy. This is the energy that takes place as the “car” is falling down the hill.
The stronger the magnet the greater the field. The static magnetic field can have mechanical effects on the pacemaker. It has been known to effect certain parts of the pacemaker allowing it to revert to different intervals of pacing. It also has the ability to reprogram or reset the device all together. The static magnetic field exerts a magnetic force that can dislodge the pacemaker leads.
Howard University Washington, D.C. Department of Mechanical Engineering “Strain Hardening “ Lab 2 By Theron Lewis For Professor H.A. Whitworth October 3rd, 2011 Table of Contents ABSTRACT Work hardening (or strain hardening) is the strengthening of a metal by plastic deformation. This phenomenon occurs because of the altering of the material’s crystal structure through dislocation movements. Work hardening is used extensively in metalworking, where one intentionally induces plastic deformation to increase strength and change its shape. These processes are also known as cold working.
the speed of the stator flux is same as that of rotor flux. Wound Rotor Synchronous Generator (WRSG) is also called the Electrically Excited Synchronous Generator (EESG), where it is excitation is done with a coil. While the excitation for the Permanent Magnet Synchronous Generator (PMSG) is provided by a permanent magnet. Both the WRIG and PMSG are also called as Full-size Converter generator (14). Figure 2 6 WRSG based WTs In WRSG the machine side converter (MSC) uses a passive rectifier and the generator is controlled through a excitation control using DC/DC converter in the rotor winding.
Centripetal acceleration Introduction Centripetal acceleration is the force that is felt when going through a circular path. Anybody who has ever been on a roller coaster knows how this force feels. This feeling is often described as centrifugal force, although there is no actual force pushing or pulling passengers away from the circle. The force felt is your body’s resistance to the roller coasters change in direction: your body wants to continue in a straight line and attempts to do so as the train turns. The purpose of this experiment was to measure centripetal acceleration and a centripetal force of a mass.
In static equilibrium, a body is not moving. Then the acceleration is zero and from Newton's second law the net force must also be zero. A Force table is a common physics lab equipment that has three or more chains or cables attached to a center ring. The chains or cables apply forces upon the center ring in three different directions. Usually the experimenter adjusts the direction of the three forces, makes measurements of the amount of force in each direction, and determines the vector sum of three forces.
Lift “How can a heavy metal lift off the ground”? You may ask. The answer to this question is the lift of the wing, and there are two explanations about how the lift are generated. As everyone can see, the shape of the airplane wings is in a stream line form, which is flat along the bottom and curved on the top. The purpose of this design is not for pleasing to the eye, but for the perspective of physics.
Streetcars were one of the most successful inventions because they ended horse railways, increased in number quickly, were a widely accepted innovation, and helped with the expansion of towns outward. In the beginning of the 1800s, the way to travel was by horse railways, however, they were not the most effective or quickest way to get around. In 1873, the first attempt to end horse railways was made with the invention of the cable cars , another type of an electric streetcar, and they were much more dependable. These electric streetcars were pulled by a cable beneath a city’s streets instead of being tugged by a horse (Smith, p. 16). These cable cars were then introduced to Richmond, Virginia and were a big hit (Carson and Bonk).
Because it was not a direct force like pushing or pulling. The force of gravity on an object depends on the mass and the distance. Free fall is caused by this gravitational force. Every object falls down at the same speed because the gravitational acceleration is independent of the mass of the object. Gravitational acceleration was found using this formula: g=2ht2 Impact speed of the falling objects was found using this formula: v=2ht Percentage error between calculated values and those obtained from the slope of the graphs were found using this formula: percent error=calculated value-slopecalculated value x100% PROCEDURE Firstly we placed the falling sphere apparatus on the table.