![]() The stars and planets, believed to represent gods, were often worshipped. Early civilizations dating back before 3000 BCE, such as the Sumerians, ancient Egyptians, and the Indus Valley Civilisation, had a predictive knowledge and a basic awareness of the motions of the Sun, Moon, and stars. Main article: History of astronomy Ancient Egyptian astronomy is evident in monuments like the ceiling of Senemut's tomb from the Eighteenth Dynasty of Egypt.Īstronomy is one of the oldest natural sciences. The big bang theory, one of the famous theory in physics.This image illustrates the rapid expansion of the universe with the time History For example, advances in the understanding of electromagnetism, solid-state physics, and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons advances in thermodynamics led to the development of industrialization and advances in mechanics inspired the development of calculus. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in these and other academic disciplines such as mathematics and philosophy.Īdvances in physics often enable new technologies. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. Over much of the past two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the Scientific Revolution in the 17th century these natural sciences emerged as unique research endeavors in their own right. Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. A scientist who specializes in the field of physics is called a physicist. Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves. These definitions are offered as an interpretational framework for comparing studies that relate physical activity, exercise, and physical fitness to health.Physics is the natural science of matter, involving the study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. The degree to which people have these attributes can be measured with specific tests. Physical fitness is a set of attributes that are either health- or skill-related. Exercise is a subset of physical activity that is planned, structured, and repetitive and has as a final or an intermediate objective the improvement or maintenance of physical fitness. Physical activity in daily life can be categorized into occupational, sports, conditioning, household, or other activities. ![]() ![]() The energy expenditure can be measured in kilocalories. Physical activity is defined as any bodily movement produced by skeletal muscles that results in energy expenditure. This paper proposes definitions to distinguish them. However, they are often confused with one another, and the terms are sometimes used interchangeably. "Physical activity," "exercise," and "physical fitness" are terms that describe different concepts. ![]()
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