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Q. Explain density?
Answer:-
Density is a physical characteristic also is a measure of mass per unit of volume of a material or substance. It is a dimension of the amount of matter in a given volume of something.
The higher an object's density means the higher it's mass per unit of volume. The average density of an object equivalent its total mass divided by its total volume. A denser thing (such as iron) will have less volume than an equal mass of some less dense substance (such as water).
explain with the aid of a diagram what is meant by the moment of a force about point
It states that angular momentum of a system remains conserved if no net torque is acting on the system.
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The velocity with which the group of waves travels is called as group velocity or the velocity with which a ray packet goes is called as group velocity
what is the importance of laser?
Suppose Fluid (say, water) occupies a domain D and has velocity field V=V(x, t). A substance (say, a day) is suspended into the fluid and will be transported by the fluid as well
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Can any heat exist without some source of friction?
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