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Sia ? 3 years, 7 months ago
Dalton’s Law, or the Law of Partial Pressures, states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the gases in the mixture.
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Sia ? 3 years, 7 months ago
Free Oscillation - The free oscillation possesses constant amplitude and period without any external force to set the oscillation. Ideally, free oscillation does not undergo damping. But in all-natural systems damping is observed unless and until any constant external force is supplied to overcome damping. In such a system, the amplitude, frequency and energy all remain constant.
Damped Oscillation - The damping is a resistance offered to the oscillation. The oscillation that fades with time is called damped oscillation. Due to damping, the amplitude of oscillation reduces with time. Reduction in amplitude is a result of energy loss from the system in overcoming external forces like friction or air resistance and other resistive forces. Thus, with the decrease in amplitude, the energy of the system also keeps decreasing. There are two types of damping
- Natural Damping
- Artificial Damping
Forced Oscillation - When a body oscillates by being influenced by an external periodic force, it is called forced oscillation. Here, the amplitude of oscillation, experiences damping but remains constant due to the external energy supplied to the system.
For example, when you push someone on a swing, you have to keep periodically pushing them so that the swing doesn’t reduce.
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This type of motion is defined as the motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time, irrespective of the duration of the time.
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Sia ? 3 years, 4 months ago
the refractive index of a material is a dimensionless number that describes how fast light travels through the material. It is defined as n = c/v, where c is the speed of light in vacuum and v is the phase velocity of light in the medium.
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Royal Thakur? 3 years, 7 months ago
3Thank You