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Two balls, each of radius R, equal mass and density are placed in contact, then the force of gravitation between them is proportional to
The gravitational force between two objects is influenced by their masses, the distance between them, and the density of the material involved. When the mass of an object is expressed in terms of its volume and density, the force becomes proportional to the fourth power of the radius, assuming the dRead more
The gravitational force between two objects is influenced by their masses, the distance between them, and the density of the material involved. When the mass of an object is expressed in terms of its volume and density, the force becomes proportional to the fourth power of the radius, assuming the density remains constant.
This relationship indicates that as the radius of an object increases, the gravitational force grows significantly due to the radius being raised to the fourth power. This dependence on radius highlights the impact of size and density in determining the strength of gravitational interactions.
F = G (m x m)/((2 R)²) = G ((4/3 πR³p)²)/(4 R²)
See lessF ∝ R⁴
A ball of superconducting material is dipped in liquid nitrogen and placed near a bar magnet. in which direction will it move and why?
When a ball of superconducting material is dipped in liquid nitrogen and placed near a bar magnet, it will move away from the magnet. This happens because a superconductor exhibits ideal diamagnetic behavior (Meissner effect), repelling magnetic field lines. For more visit here: https://www.tiwariacRead more
When a ball of superconducting material is dipped in liquid nitrogen and placed near a bar magnet, it will move away from the magnet. This happens because a superconductor exhibits ideal diamagnetic behavior (Meissner effect), repelling magnetic field lines.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-5/
What do you mean by binding energy of a satellite ? Write an expression for it.
The binding energy of a satellite is the energy required for it to escape its orbit around the Earth and move to infinity. The total energy of a satellite in orbit is given by: E = - GMm/2r. where G is the gravitational constant, M is the mass of the Earth, m is the mass of the satellite, and r is tRead more
The binding energy of a satellite is the energy required for it to escape its orbit around the Earth and move to infinity.
The total energy of a satellite in orbit is given by:
E = – GMm/2r.
where G is the gravitational constant, M is the mass of the Earth, m is the mass of the satellite, and r is the orbital radius.
To escape to infinity, the satellite must be provided with additional energy equal to:
+ GMm/2r
This additional energy ensures that the total energy E becomes zero, allowing the satellite to escape Earth’s gravitational pull.
Thus, the binding energy of a satellite is:
See lessBinding energy = GMm/2r.
What is the best time to perform stretching?
Stretching is recommended before exercise to improve flexibility and prevent injuries. After exercise, it helps in recovery by relieving muscle tension, reducing stiffness, and improving blood circulation. Performing stretches at both times ensures the body remains flexible and relaxed, contributingRead more
Stretching is recommended before exercise to improve flexibility and prevent injuries. After exercise, it helps in recovery by relieving muscle tension, reducing stiffness, and improving blood circulation. Performing stretches at both times ensures the body remains flexible and relaxed, contributing to enhanced performance and quicker recovery from physical exertion.
See lessAnswer: (C)
Which of these is NOT a warm-up activity?
Static stretches, like the overhead triceps stretch, are usually part of cool-downs rather than warm-ups. Warm-up activities involve dynamic movements such as jogging, high-knee sprints, and shadow boxing, which elevate heart rate, improve muscle elasticity, and prepare joints for physical exertion.Read more
Static stretches, like the overhead triceps stretch, are usually part of cool-downs rather than warm-ups. Warm-up activities involve dynamic movements such as jogging, high-knee sprints, and shadow boxing, which elevate heart rate, improve muscle elasticity, and prepare joints for physical exertion. Warm-ups ensure better performance and reduced injury risks.
See lessAnswer: (C)