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julia-pushkina [17]
3 years ago
9

you find out that it takes 2 sec. for the swing to complete one cycle. what is the swing`s period and frequency?

Physics
1 answer:
Gnesinka [82]3 years ago
6 0

The time it takes "to complete one cycle" is a perfect definition for <em>period</em>.
So the <em>2 sec</em> that you measured is the swing's period.

Frequency is just   1/period  (the 'reciprocal' of the period).
For this swing, the frequency is   1/(2sec)  =  0.5 per second = <em>0.5 Hz</em>.

( "Hertz" means "per second")


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A room has dimensions 3.00 m (height) 3.70 m 4.30 m. A fly starting at one corner flies around, ending up at the diagonally oppo
horrorfan [7]
The displacement is the straight-line distance it flew when everything is over.  We don't count all of the turns that it made in the displacement.  So if it's in an opposite corner we just need to know how far it is from one corner of a box to the opposite corner with the given dimensions.  We use the Pythagorean Theorem for part a):
d= \sqrt{3.00^{2}+3.70^{2}+4.30^{2}}=6.42m
b).  Since the displacement is the straight line path, there are no shorter paths that this.
c)All other paths are greater
d) if the fly flies this path, then they would be equal
in cartesian coordinates, the vector is the sum of the 3 components whose magnitudes are the wall lengths and whose directions are parallel to that wall:
D=a_x3.70+a_y4.30+a_z3.00

The shortest walking path is 7.96m.
3 0
3 years ago
Two identical loudspeakers are some distance apart. A person stands 5.20 m from one speaker and 4.10 m from the other. What is t
Igoryamba

Answer:

125.09 Hz

Explanation:

Given : A person stands 5.20 from one speaker and 4.10 m away from the other speaker.

Distance between the speakers is 5.20 - 4.10 =1.10 m

We know that

For destructive interferences

        n . λ / 2

where n =1,3,5,7....

Therefore difference between the speakers is

5.10 - 4.20 = 1 X 0.5 λ

λ = 2.2

Given velocity of sound is V = 344 m/s

Therefore frequency, f = \frac{v}{\lambda }

                                      = \frac{344}{2.2 }

                                      = 156.36 Hz

Now, the third lowest frequency is given by

              λ = (5.20-4.10) X 5 X 0.5

                 = 2.75 m

Therefore frequency, f = \frac{v}{\lambda}

                                      = \frac{344}{2.75}

                                      = 125.09 Hz

Therefore third lowest frequency is 125.09 Hz

5 0
3 years ago
How does nuclear fusion affect the life cycle of a star?.
Fittoniya [83]

Answer:

As the main sequence star glows, hydrogen in its core is converted into helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts

Explanation:

4 0
2 years ago
Gravity is a force between any two objects with mass wht doesn’t a person feel a gravitational force between them herself and an
kipiarov [429]
It is because both of them are attracted towards earth where the heavier body gravity field influence is more in comparision to small. For eg; there are two magnet with less power in besides of huge power or magnetic influence then both of the less power magnet are attracted towards the huge one rather than attracting themselves.


Hope its helps u!
6 0
3 years ago
A point charge of 4.0 µC is placed at a distance of 0.10 m from a hard rubber rod with an electric field of 1.0 × 103 . What is
yuradex [85]
Since

Electric potential energy = qV

Where V = Ed

Hence
Electric potential energy = q(Ed) --- (1)

Since E = 1.0 * 10^3 N/C
d = 0.10 m
q = 4 * 10^-6 C

Plug in the values in (1)
(1) => Electric potential energy =  4 * 10^-6(1.0 * 10^3 * 0.10)
Electric potential energy = 400 μJ
3 0
3 years ago
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