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Zielflug [23.3K]
3 years ago
5

Four seismometers stations are the minimum needed to calculate the epicenter of an earthquake.

Physics
1 answer:
Marina CMI [18]3 years ago
6 0

"Four seismometer stations are the minimum needed to calculate the epicenter of an earthquake".

Answer: The above statement is False.

<u>Explanation:</u>

  • Seismographs are devices used to measure the movement of earth and it uses a motion sensor named seismometers that are connected with a recording devices.
  • They determine the actual movement of the earth at a particular time and it records the observation.
  • Three seismometers are used to locate the center point of the earthquake region.  
  • Seismograph displays the damage caused by the earthquake in a graphical data based on the readings observed in the seismometer.
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Like windmills they use the winds to generate their power.
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3 years ago
Explain nuclear fusion briefly
nikdorinn [45]

Answer:

Nuclear fusion is the process in which two atomic nuclei are fused together into a larger single nucleus, releasing energy in the process. ... In proton-proton fusion, four hydrogen atoms are fused into a single helium-4 atom, releasing a lot of energy in the process.

Explanation:

6 0
4 years ago
You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, it moves a dis
uranmaximum [27]

Answer:

The magnitude of force exerted on the handle is 108.73 N

Explanation:

To determine the magnitude of force exerted, we will use the formula relating Power and Force.

Power is the rate at which work is done. Power can be calculated from the formula

Power = Work / Time

But, Work = Force × Distance

Hence,

Power is given by the formula

P = \frac{F \times s}{t}

Where P is the Power

F is the force

s is the distance

and t is the time

From P = \frac{F \times s}{t},

Then we can write that

F = \frac{P \times t}{s}

From the question,

Distance, s = 1.1 m

Time, t = 1.3 s

Power, P = 92 W

Putting these values into the formula, we get

F = \frac{92 \times 1.3}{1.1}

F = \frac{119.6}{1.1}

F = 108.73N

Hence, the magnitude of force exerted on the handle is 108.73 N.

7 0
3 years ago
Why is reaching activation energy necessary? Reactants require a minimum amount of energy to start to break a chemical bond. Pro
Ksju [112]

Answer:

<em>Reaching activation energy</em><em> is necessary because reactants require a </em><em>minimum</em><em> </em><em>amount of energy</em><em> start breaking a</em><em> chemical bond.</em>

Explanation:

Activation energy is the minimum amount of energy required by the reactants to initiate a chemical reaction. The unit of activation energy is joule or  kilo joule per mole or kilo calories per mole. Activation energy depends on temperature.

The temperature dependence of activation energy is given  by Arrhenious equation. Activation energy is a threshold value of energy. For any reaction to occur this is the minimum amount of energy required.

7 0
4 years ago
Read 2 more answers
A light spectrum is formed on the screen using a diffraction grating. The entire apparatus made up of laser, grating and the scr
Tems11 [23]

Answer:

the points are closer to each other

Explanation:

The expression for the diffraction of a grating is

         d sin θ = m λ

         sin θ = m λ / d            (1)

where d is the distance between slits and m is the order of diffraction, the most general is to work in the order m = 1, the angle te is the angle of diffraction

When we immerse the apparatus in a medium with refractive index n = 1.33, the light emitted by the laser must comply

         v = λ f

where v is the speed of light in the medium, the frequency remains constant

velocity and refractive index are related

          n = c / v

          v = c / n

we substitute

          c / n = λf

          λ = \frac{c}{f}  \ \frac{1}{n}

          λ = λ₀ / m

where λ₀ is the wavelength in vacuum

we substitute is equation 1

         d sin θ = m λ₀ / n

         sin θ =  λ₀/ n d

         sin θ = \frac{1}{n}  sin θ₀

we can see that the value of the sine is redueced since the refractive index is greater than 1,

consequently the points are closer to each other

3 0
3 years ago
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