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olganol [36]
3 years ago
14

How many magnitude 8 earthquakes does it take to equal the energy release for a magnitude 9 earthquake?

Physics
1 answer:
WINSTONCH [101]3 years ago
8 0
The popular Richter scale for measuring the magnitude of earthquakes is based on a log₁₀ scale.
Therefore, a magnitude 9 earth quake is 10 times a magnitude 8  earthquake.

That is, it takes ten magnitude 8  earthquakes to equal the energy released by one magnitude 9 earthquake.

Answer: 10
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A battery supplies E volts to a circuit containing a resistor R. How could the current in the resistor be increased? Select all
anastassius [24]

Answer:

I=V/R

so larger bsttery or small resistor can increase the current value.

5 0
3 years ago
Assuming motion is on a straight path, what would result in two positive components of a vector?
erastovalidia [21]
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3 0
3 years ago
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An ac power generator produces 73.37 a (rms) at 4623 v. the voltage is stepped up to 105,033 v by an ideal transformer, and the
evablogger [386]

Step up transformer is a device which is used to step up the voltage which is input with some value.

This is based upon the principle of mutual inductance and in this the voltage input and voltage output is different because of number of turns.

Here if ideal transformer is given then power input and power output of the transformer must be same as there is no power loss in ideal transformer.

So we can write

i_pV_p = i_sV_s

here

i_p = 73.37 A

V_p = 4623 V

V_s = 105033 A

now using above equation we will have

73.37*4623 = 105033*i_s

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7 0
3 years ago
The North American Plate is moving west at a rate of approximately 20 mm/yr. How long will it take for New York to move 10° long
scZoUnD [109]

Answer:

55000000 years

Explanation:

Rate of North American Plate moving (Velocity) = 20 mm/yr

Degrees New York has to move = 10° west

New York's longitude = 110 km/°

Distance of New York = 110×10 = 1100 km

= 1100×10⁶ mm

\text {Time taken by the continental plate}=\frac {\text {Distance of New York}}{\text {Rate of North American Plate moving (Velocity)}}\\\Rightarrow \text {Time taken by the continental plate}=\frac{1100\times 10^6}{20}\\\Rightarrow \text {Time taken by the continental plate}=55\times 10^6\ years

∴ Time taken by New York to move 10° west is 55000000 years

6 0
3 years ago
The layers of gas that surround the Earth
Ierofanga [76]

Answer:

Our planet is surrounded by a layer of gases called the atmosphere. ... ➢ Without our atmosphere, there would be no life on earth. ➢ Scientists divided the atmosphere into four layers according to temperature: troposphere, stratosphere, mesosphere, and thermosphere.

Explanation:

8 0
3 years ago
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