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Aspect Precision Accuracy Definition Precision refers to how consistent or repeatable measurements are, regardless of how close they are to the true value. Accuracy refers to how close a measured value is to the true or accepted value. Focus Focuses on the repeatability of measurements. Focuses on how close the measurements are to the true … Read more
A measuring cylinder is a common laboratory instrument used for measuring the volume of liquids. It is designed with a narrow cylindrical shape and has graduated markings along the length of the cylinder to allow for accurate readings. Justification: The graduated scale allows users to read the exact volume of liquid by observing the meniscus … Read more
Error is the deviation between the measured value and the true or accepted value. In any experimental measurement, errors can occur due to various factors. Understanding the types of errors helps in minimizing them and improving the accuracy of measurements. Types of Errors: Random Errors: These are unpredictable fluctuations that occur during measurements. They arise … Read more
A screw gauge (also known as a micrometer screw gauge) is a precision instrument used to measure the dimensions of small objects with high accuracy, such as the thickness of wires, small machine parts, or the diameter of a small cylindrical object. It uses a screw mechanism for measuring the object. Construction: Spindle: One end … Read more
A Vernier caliper is a highly accurate instrument used for measuring the dimensions of objects. It can measure internal and external dimensions as well as depths, offering a significant advantage over simple rulers or measuring tapes. The instrument consists of two main scales: the main scale and the Vernier scale. Construction: Main Scale: The fixed … Read more
Scientific notation (or standard form) is a method of expressing very large or very small numbers in a more manageable and compact form. This system expresses numbers as a product of two parts: a number (called the coefficient) between 1 and 10, and a power of 10. This notation is especially useful in science and … Read more
Prefixes are used to express very large or very small numbers in a more manageable form. They are added to the base units to represent multiples or fractions of that unit. These prefixes simplify the representation of measurements and make it easier to work with very large or very small values. Examples include: Kilo- (k): … Read more
A physical quantity is any measurable property of an object or phenomenon that can be described using a numerical value and a unit. Examples include length, time, mass, temperature, and force. Base Physical Quantities: These are fundamental quantities that cannot be defined in terms of other quantities. They are independent and form the foundation for … Read more
Physics is divided into several branches, each focusing on specific aspects of the physical world: Classical Mechanics: This branch deals with the motion of bodies under the influence of forces. It includes the study of laws of motion, such as Newton’s laws, and the dynamics of solid objects. It is foundational for understanding the behavior … Read more
Physics is the branch of science that deals with the nature and properties of matter and energy. It seeks to understand the fundamental forces of the universe, from subatomic particles to cosmic phenomena. Physics has revolutionized technology by providing the principles behind innovations like electricity, electromagnetism, nuclear energy, and quantum mechanics. This has led to … Read more