physics investigatory project class 11 on friction

Water, fat, and other substances in the food absorb energy from the microwaves in a process called dielectric heating. Ferromagnetic materials can be divided into magnetically 'soft' materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically 'hard' materials, which do. Consumer ovens usually use 2.45 gigahertz (GHz)a wavelength of 12.2 centimeters (4.80 in)while large industrial/commercial ovens often use 915 megahertz (MHz)32.8 centimeters (12.9 in). this project is for class 11 and 12 project contains whole detail about viscosity of fluids and fluids type. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism. These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone.

Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets. 1 P a g e DELHI PUBLIC SCHOOL, BANGALORE NORTH PHYSICS INVESTIGATORY PROJECT (2022-2023) TOPIC: RAFT POWERED BY SURFACE TENSION BOARD ROLL NO: 2 P a g e INDEX S.No Pg. A magnet is a material or object that produces a magnetic field.

Physics investigatory project class 11 on friction