Which explains earthquakes and volcanic eruptions?global positioning theory
lithospheric theory
plate tectonics theory
nebular theory

Answers

Answer 1

Answer: Plate tectonics theory explains earthquakes and volcanic eruptions. Global positioning theory, lithospheric theory and nebular theory do not explain the earthquakes and volcanic eruptions

Answer 2

Answer:

Answer:

C. Plate tectonics theory

Explanation:

According to the plate tectonics theory outer layer of earth is divided into seven major and some minor plates. And these plates form convergent,divergent and transverse boundaries. So the Pacific ring of fire, subduction zone, continental drift are evidences of plate tectonics theory. Earthquakes and volcanic eruption are also explained by plate tectonics theory.

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A tuning fork with a frequency of 512 Hz is used to tune a violin. When played together, beats are heard with a frequency of 4 Hz. The string on the violin is tightened and when played again, the beats have a frequency of 2 Hz. The original frequency of the violin was ______.

Answers

Answer:

508Hz

Explanation:

When two sound waves of different frequency approach your ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud - this phenomenon is beat production

frequency is the number of oscillation a wave makes in one seconds.

f1-f2=beats

therefore f1=512Hz

f2=?

beats=4Hz

512Hz-f2=4Hz

f2=512-4

f2=508Hz

the original frequency of the violin is 508Hz

Final answer:

The original frequency of the violin was 508 Hz. This is based on the principle of beats, where the beat frequency is the absolute difference in frequency between the two sources - in this case, the tuning fork and the violin string.

Explanation:

The original frequency of the violin string can be found using the principle of beats. The frequency of the beats is equal to the absolute difference in frequency between the two sources - in this case, the tuning fork and the violin string.

Initially, the beat frequency was heard as 4 Hz. This indicates that the original frequency of the violin was either 512 Hz + 4 Hz = 516 Hz, or 512 Hz - 4 Hz = 508 Hz. However, when the violin string was tightened, the beat frequency decreased to 2 Hz, which means the frequency of the note it was producing increased.

Therefore, the violin must have initially been producing a note with lower frequency (508 Hz), and even after tightening the string, the note it now produces (510 Hz) remains lower than that of the tuning fork.

Learn more about Beat Frequency here:

brainly.com/question/29428851

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two pendulums of lengths 100cm and 110.25cm start oscillating in phase. after how many oscillations will they again be in same phase?

Answers

Angular frequency of pendulum is given by

$\omega = \sqrt{(g)/(l)}$

for both pendulum we have

$\omega_1 = \sqrt{(9.81)/(1.00)}$

$\omega_1 = 3.13 rad/s$

For other pendulum

$\omega_2 = \sqrt{(9.81)/(1.1025)}$

$\omega_2 = 2.98 rad/s$

now we have relate angular frequency given as

[tex\omega_1 - \omega_2 = 3.13 - 2.98 = 0.15 rad/s[/tex]

now time taken to become in phase again is given as

$t = (2\pi)/(\omega_1 - \omega_2)$

$t = (2\pi)/(0.15) = 41.88 s$

now number of oscillations complete in above time

$N = (t)/((2\pi)/(\omega_1))$

$N = (41.88)/((2\pi)/(3.13))$

$N = 21 oscillation$

Explain why dogs pant during hot summer days using the concept of evaporation?

Answers

Dogs pant because they can't sweet out their heat so they pant it out (and drink water) to cool themselves down.

A 2,100 kg car is lifted by a pulley. If the cable breaks at 4.50 m, what is the velocity of the car when it hits the ground

Answers

The problem involves the conversion of potential energy to kinetic energy as the object falls from rest. Energy is conserved, so the equation used is:

PEi + KEi = PEf + KEf

Since the object is falling from rest, the initial kinetic energy is zero. Also, since the object hits the ground at its final position, the final potential energy is zero. This leaves:

PEi = KEf
mgh = 1/2 mv^2

*cancel out mass on both sides of the equation

gh = 0.5v^2
v = sqrt(2gh) = sqrt(2*9.81*4.5) = 9.40 m/s --> final ans.

What is the working procedure of electric geyser

Answers

Working of Electric Geyser:
the phenomenon which occurs is only the transfer of electric energy into the heat energy...
the water enters through the input and then it is passed into a container having alloy coil which is also covered by conductor of heat but this conductor cannot pass electricity into water but only heat...
then water is heated over there and comes out through outlet...

There is a copper coil present in the electric geyser which gets hot when electricity is passed through it . This rod makes the water in the geyser hot .

what would be the final temperature of a mixture of 50g water at 20c temperature and 50g of water at 40c temperature?

Answers

Because there is the same amount of water in each sample, the samples have an equal amount of influence over the overall temperature. that means it will be somewhere right in the middle of the two original temperatures. The middle, also the average, of the two samples' temperatures is 30c, meaning that if you combined the 20c water and the 40c water the final result would be 100g of 30c water. If you need some more explanation, just ask.

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