The impulse-theorem states that the change in momentum of an object is equal to the impulse exerted on it
Explanation:
The impulse-theorem states that the change in momentum of an object is equal to the impulse exerted on it.
Mathematically, we have:
- The impulse is defined as the product between the force exerted (F) and the duration of the collision ():
- The change in momentum is equal to the product between the mass of the object (m) and the change in velocity ():
So, the theorem can be written as
This theorem can be proved by using Newton's second law. In fact, we know that
(1)
where a is the acceleration of the object. However, we can re-write the acceleration as the rate of change of velocity:
Therefore, (1) becomes:
And by re-arranging,
Which is exactly the formula of the impulse theorem.
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I got 15.04 m/s. What I did was I made a little chart. Hopefully the picture helps
Answer:
d. It increases numerical aperture and maintains a uniform light speed.
Explanation:
In optical microscopes, various immersion mediums are used to improve or enhance the resolution. Immersion oils like cedar and Leica oils are one of those mediums which are used to improve resolution by increasing the numerical aperture and keeping the speed of light uniform.
It's called ' interference '.
If the strings are 'in tune' (same frequency) and in phase, then
they overlap to make a louder sound ... CONstructive interference.
If the strings are 'in tune' (same frequency) but out of phase, then
they overlap to make a softer sound ... DEstructive interference.
If the strings are 'out of tune' (different frequencies), then they overlap
to make a sound that's louder at some times and softer at other times.
The louder and softer pattern creates a new sound, called the 'beat'.
Its frequency is the difference in the frequencies of the two strings.
Water displacement is the least difficult approach to decide the volume of an unpredictably formed or complex object. Rather than making various estimations and computations that might be inclined to error, it is just important to submerge the object in fluid and note the volume displaced. Ordinarily, this would be finished utilizing an aligned holder so the volume when inundation can be noted.
At the point when used to calculate the volume of a solid object, the drenching must be aggregate, and care taken to guarantee that no air is caught in any holes. Nonetheless, displacement can likewise be utilized to ascertain the heaviness of a vessel, in which instance obviously, the inundation isn't add up to; the vessel is permitted to drift and, as Archimedes broadly found, its weight will then be equivalent to that of the volume of water displacement.