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Explain significant figures.
Significant figures include all certain digits and the first uncertain digit. For example, 0.00450 has 3 significant figures. For more please visit here: https://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
Significant figures include all certain digits and the first uncertain digit. For example, 0.00450 has 3 significant figures.
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Which of the following does not affect the value of g on Earth’s surface?
On Earth, the effective value of g, or acceleration due to gravity, is not influenced by temperature. Many factors go into determining the value of gravity, while temperature has no bearing in this sense. Gravity is another influence due to the Earth's rotation, which provides a centrifugal force thRead more
On Earth, the effective value of g, or acceleration due to gravity, is not influenced by temperature. Many factors go into determining the value of gravity, while temperature has no bearing in this sense.
Gravity is another influence due to the Earth’s rotation, which provides a centrifugal force that decreases the effective weight at the equator. This means that the Earth’s gravity is weaker at the equator than it is at the poles because the Earth rotates. Besides, Earth is not a perfect sphere; it is more like an oblate spheroid. The reason gravity is weak at high altitudes is because the distance from the Earth’s center is higher. On the other hand, temperature does not affect the value of gravitational force at the surface of the Earth. Although it can alter physical properties, including air density, it does not alter the mass of the Earth or the distance to its center. Hence, in terms of factors that will affect acceleration due to gravity, temperature can be ignored, meaning it is considered a constant when using the variation of gravity as a function at different points on Earth.
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See lessWhen does a scientific theory need modification or replacement by a new theory? Briefly explain giving suitable examples.
A scientific theory needs modification or replacement when it can no longer adequately explain or predict observed phenomena, or when new evidence contradicts its predictions. This typically happens when the theory encounters anomalies or fails in certain situations where it was previously applicablRead more
A scientific theory needs modification or replacement when it can no longer adequately explain or predict observed phenomena, or when new evidence contradicts its predictions. This typically happens when the theory encounters anomalies or fails in certain situations where it was previously applicable, or when a more comprehensive or accurate theory is developed.
For example, Newtonian mechanics, which was widely accepted for centuries, was modified after experiments showed that it could not explain the motion of objects at very high speeds or in very strong gravitational fields. This led to the development of Einstein’s theory of relativity, which provides a more accurate description of gravity and motion at large scales and high velocities, replacing Newtonian physics in these contexts.
Similarly, classical electromagnetism could not explain phenomena on the atomic scale, such as the behavior of electrons. This limitation was addressed by the development of quantum mechanics, which replaced classical theories to explain the behavior of matter and energy at very small scales.
In both cases, the theories were not discarded entirely but were modified or extended to accommodate new data and observations, leading to a deeper and more complete understanding of the natural world.
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What is the true essence of Yoga as described in this chapter?
Yoga, originating in India, is a journey of self-discovery that integrates the body, mind, and soul. It's not just physical exercise but a profound science fostering inner peace and unlocking human potential. By practicing Yoga, individuals achieve balance and harmony, leading to physical health, meRead more
Yoga, originating in India, is a journey of self-discovery that integrates the body, mind, and soul. It’s not just physical exercise but a profound science fostering inner peace and unlocking human potential. By practicing Yoga, individuals achieve balance and harmony, leading to physical health, mental clarity, and spiritual awakening. This practice, rooted in discipline and self-awareness, transcends worldly distractions, guiding practitioners toward self-realization and happiness.
See lessExplain the purpose of starting a Yoga session with an opening prayer.
Starting a Yoga session with an opening prayer creates a serene and respectful environment, fostering a sacred connection between the teacher and student. The prayer invokes divine guidance, wisdom, and protection, aligning energies for an enriching experience. It encourages mutual respect, focus, aRead more
Starting a Yoga session with an opening prayer creates a serene and respectful environment, fostering a sacred connection between the teacher and student. The prayer invokes divine guidance, wisdom, and protection, aligning energies for an enriching experience. It encourages mutual respect, focus, and mindfulness, ensuring participants are mentally and emotionally prepared. This ritual underscores Yoga’s spiritual essence, emphasizing holistic well-being beyond physical postures.
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