Based on the equation, determine what happens to the frequency if the period were to change from 0.2 seconds to 0.5 seconds. a) it would invert. b) it would decrease. c) it would increase. eliminate d) it would not change.

Frequency can be defined as the number of times an event occurs within a unit time. In the context of waves for example, frequency refers to the number of waves that pass through a point in a certain amount of time.

Mathematically, the frequency (f) is related to the time period (T) as-

f = 1/T

SI Unit of frequency is Hertz (Hz)

In the given example:

When T = 0.2 s;  f = 1/0.2 = 5 Hz

When T = 0.5 s; f = 1/0.5 = 2 Hz

As T increases, f decreases

Ans: B) It would decrease

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.