Monday

November 30, 2015
Number of results: 33,674

**science**

explain how an magnitude of 8.0 earthquake could be classified as a low intensity
*February 13, 2011 by Anonymous*

**science**

how does a magnitude-8.0 earthquake could be classified as a low-intensity earthquake? LAST SCIENCE QUESTION!
*April 1, 2009 by Sara*

**College Algebra**

This exercise deals with logarithmic scales. Earthquake A had a magnitude of 8.2 on the Richter scale. At the same time an earthquake B with magnitude 4.8 caused only minor damage. How many times more intense was earthquake A than earthquake B? (Round your answer to two ...
*August 3, 2015 by Melany*

**maths**

The magnitude of an earthquake with intensity I is measured using a seismograph. The intensity I is converted into the Richter scale number using the following formula R=log10I. An earthquake in Town A was measured 3 on the Richter scale, while the earthquake in Town B ...
*May 8, 2013 by hemant*

**Math**

An earthquake was recorded which was 1584893 times more powerful than a reference level zero earthquake. What is the magnitude of this earthquake on the Richter scale? Intensity on the Richter scale is log(I/Io).
*December 4, 2013 by DROSP*

**Math (PreCalculus)**

An earthquake was recorded which was 1584893 times more powerful than a reference level zero earthquake. What is the magnitude of this earthquake on the Richter scale? Intensity on the Richter scale is log(I/Io). Correct Answer is 6.268. But how to get that?
*December 4, 2013 by DROSP*

**d**

Calculus help!!Suppose an earthquake is measured with a magnitude of 6 on the Richter scale with an error of at most 2%. Use differentials to find the error in the intensity of the earthquake
*November 7, 2012 by Anonymous*

**Earth Science **

To measure the strength of an earthquake, you can use either a______scale or______scale. A)Richter B)seismograph C)mercalli intensity part:2 A)moment magnitude B)seismogram C)mercalli intensity
*December 7, 2009 by george*

**health**

Which type of exercise increases fat loss? A. High-intensity B. High-duration C. High-duration/low-intensity D. High-intensity/low-duration im stuk on this question and i can't get any information about it inside my head.weird can any one explain to me simple words please
*September 16, 2008 by AK*

**Pre-Calculus**

The Richtr scale was evied y Cahrles F.Richter a American geologist. The scale is based on the equation M(x)=logx/x0(little 0), where x is the seismographic reading of the earthquake and x0 i 1 miron 0.001mm (the seismographic reading of a zero-level earthuquake) a) Determine ...
*December 21, 2009 by Andy*

**math**

An earthquake has a magnitude of 6.7 on the Richter Scale.Find the intensity.
*December 3, 2011 by Earthquakes*

**math**

the seismic waves of a magnitude 6 earthquake are 10 squared times as great as a magnitude 4 earthquake. The seismic waves of a magnitude 4 earthquake are 10 times as great as a magnitude 3 earthquake. How many times as great are the seismic waves of a magnitude 6 earthquake ...
*February 9, 2014 by nicey*

**Word problem 2**

The 1985 Mexico city earthquake had a magnitude of 8.1 on the Richter scale. The 1976 earthquake in Tangshan, China was 1.26 times and intense. What was the magnitude of the Tangshan earthquake. Thanks
*February 14, 2007 by Jen*

**pre-calc 12**

Determine the magnitude of an earthquake that is 200 times as intense as an earthquake of magnitude 3.7 on the Richter scale.
*July 23, 2015 by lindo*

**Logarithmic Scales**

In 1995, Japan had an earthquake of magnitude 7.2. What is the magnitude of an earthquake that is twice as intense?
*March 28, 2012 by Anonymous*

**Earthquakes**

What determines the magnitude of an earthquake? I know that two plates slide against one another and that creates friction and the potential energy turns into kinetic energy in the form of an earthquake. But how is the magnitude determined? Im thinking the longing the 2 plates...
*September 28, 2010 by Lena*

**Logarithms **

1.) A fossil is burned and the CO2 produced is captured. It produces 453 counts of radiation per gram. Under the same conditions atmospheric CO2 produces 19 277 counts. Calculate the age of the fossil. I have the formula: Nt = N0 e^ -t(ln2)/T Nt is the number of atoms of ...
*September 4, 2012 by Amy*

**math-algebra**

How do i solve these problems: 1. 2(-5y^3)^2+(-3y^3)^3 2. Lemon juice is 10^2 times as acidic as tomato juice. Tomato juice is 10^3 times as acidic as egg whites. How many times as acidic is lemon juice as egg whites? Write as a monomial. 3. The seismic waves of a magnitude 6 ...
*February 5, 2008 by Jaylin*

**health**

Which type of exercise increases fat loss? A. High-intensity B. High-duration C. High-duration/low-intensity D. High-intensity/low-duration can you help in anyway?
*August 27, 2008 by AK*

**math**

What is the magnitude on the Richter Scale of an earthquake measuring 3.7 x 10^5 i(sub 0)? How many times more intense is a Richter 5 earthquake than a Richter 2.5 earthquake?
*November 12, 2011 by Nabil*

**alegbra2**

the April 2015 earthquake in Nepal measured 7.8 in magnitude.in 1988 there was an earthquake in the same area that measured 6.3 on the richter scale. how many times greater was the most recent earthquake than the one in 1988?
*June 1, 2015 by amber*

**Science**

1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the ...
*February 28, 2010 by Janet*

**Science(Urgent)**

1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the ...
*February 28, 2010 by Janet*

**science 6th grade**

I am suppose to explain how the moment magnitude and Richter scales of earthquake measurement are similar and how they are different. Can you tell me if I am correct? They are alike because they always come up with the same rating for an earthquake. They are different because ...
*February 11, 2011 by Reed*

**earth science...help**

for this question: Put the folloing words together in a few sentence to explain their meaning and relationship to one another: seismic waves, seismograms, seismoghaps, and seismologists. is this answer suitable: Seismic wave is an elastic shock wave that travels through the ...
*January 13, 2009 by Anonymous*

**Earth Science**

How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake? I know that a tenfold increase in wave amplitude equals an increase of 1 on the scale so 1 to 2 = 10times so does that mean that 2 to 3 would be 10 more times?
*February 28, 2010 by Janet*

**Science**

Which scale measures the amount of damage after an earthquake? Richter scale Mercalli intensity scale moment magnitude scale seismograph scale
*December 7, 2009 by george*

**Earth Science(Please help)**

How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake? I know that a tenfold increase in wave amplitude equals an increase of 1 on the scale so 1 to 2 = 10times so does that mean that 2 to 3 would be 10 more times?
*February 28, 2010 by Janet*

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 4.9 * 10^2 µm. Find this earthquake's magnitude.
*November 11, 2013 by lisa*

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 4.9 * 10^2 µm. Find this earthquake's magnitude.
*November 12, 2013 by Anonymous*

**Science help**

Which of the following illustrates conduction as a mode of heat transfer? a) A microwave oven produces electromagnetic waves that transfer to the food in the form of heat*** b) leaving a metal spoon in a bowl of hot soup will make the spoon hot as well c) Pasta rises and falls...
*April 24, 2015 by Destiny*

**MATH**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 4.3 102µm. Find this earthquake's magnitude.
*February 8, 2013 by TONYA*

**physics**

The intensity of an earthquake wave is measured to be 6 x10 ^6 J ms at a distance of 50 km from its source. Calculate the intensity when it passed the point 4 km to source ? What is the rate energy passed through an area of 6 ms^2 at 4 kW?
*November 30, 2008 by Sandhya*

**math**

On May 22, 1960, a powerful earthquake took place in Chile. It had a magnitude of 9.5. How much energy did this earthquake release?
*November 20, 2014 by samantha*

**Earth Science(Please help)**

1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the ...
*February 28, 2010 by Janet*

**Physics**

The intensity of a particular earthquake wave is measured to be 5.0 multiplied by 106 J/m2·s at a distance of 55 km from the source. (a) What was the intensity when it passed a point only 3.0 km from the source? (b) What was the rate energy passed through an area of 7.0 m2 at ...
*January 31, 2010 by Eric*

**algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.9 102 µm. Find this earthquake's magnitude on the Richter scale.
*September 1, 2011 by Sharon*

**Math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.8 x10^2 µm. Find this earthquake's magnitude on the Richter scale.
*October 29, 2011 by Angel *

**algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.2 102 µm. Find this earthquake's magnitude on the Richter scale.
*October 30, 2011 by suzie*

**Physics**

The intensity of an earthquake wave passing through the Earth is measured to be 2.5×106 J/m^2 at a distance of 48 km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area of 3.0 m^2 at 2.0 km?
*December 2, 2010 by Jake*

**Science**

The intensity of an earthquake wave passing through the Earth is measured to be 1.5×10^6 J/m^2*s at a distance of 58km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area of 3.0 m^2 at 2.0 km ?
*January 25, 2013 by Chris*

**Math**

In 1986 an earthquake measuring 5.0 on the Richter scale hit northeast Ohio. This earthquake is _______ times as intense as a magnitude 2.0 quake
*June 5, 2014 by Alexis*

**math**

A seismograph 300km from the epicenter of an earthquake recorded a maximum amplitude of 5.8*10^2lrm, find this earthquake's magnitude on the RicHTER scale to the nearest tenth.
*March 12, 2012 by sue*

**Algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.3 x 10^2 um. Find the earthquake's magnitude. Round your answer to one decimal place.
*November 7, 2014 by Paul*

**college physics**

The intensity of an earthquake wave passing through the Earth is measured to be 2.5×10^6 J/m^2 at a distance of 43 km from the source. What was its intensity when it passed a point only 2.0 km from the source? AND At what rate did energy pass through an area of 4.0 m^2 at 2.0 ...
*April 27, 2010 by Anonymous*

**alegbra**

a seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude 5.3x10^2 um. Find this earthquake's magnitude. Round this answer to one decimal place.
*May 10, 2014 by Mary Ann*

**algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.7 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*December 18, 2011 by suzan*

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.2 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.) M =
*January 23, 2012 by kiki*

**Algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.7 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*July 20, 2012 by Paul*

**Algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.5 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*November 3, 2012 by Renee Tyler*

**MATH**

A semiograph 300km from the epicenter of an earthquake recorded a maxximum amplitude of 5.3x10^2 um. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth)
*November 4, 2012 by TEDDY *

**Science**

If a tsunami develops during an underwater earthquake, what will most likely occur? a. deep-ocean sediments will travel great distances. b. no destruction will occur near the origin of the earthquake. c. the magnitude of the earthquake will determine the direction of the ...
*March 17, 2009 by Angie*

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.8 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.) M =
*October 20, 2011 by Anonymous*

**DeVry University**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.9 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*January 20, 2012 by Sandra Beasley*

**ALGEBRA**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.4 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*April 16, 2012 by Randy*

**College Math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.3 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*April 16, 2012 by Yvonne*

**ALGEBRA**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.5 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.) M =
*April 25, 2012 by Randy*

**science **

To locate the epicenter of an earthquake a seismologists must determine all of the following except ? a) the difference between arrival time of P and S waves b) seismographic locations data from the seismograph locations c) the distance from the epicenter to at least three ...
*February 18, 2014 by victoria *

**Math - Working with Logs!!**

On September 26 2001, an earthquake in North Bay measured 5.0 on the Ritcher scale. What is the magnitude of an earthquake 3 times as intense as North Bay's earthquake? I would post my answer, but in text, it's just confusing and I can't post picture links to show my work... ...
*December 11, 2007 by Anonymous*

**Physics: Earthquakes**

I'm studying for an upcoming exam and I came across this problem: 10 seconds separate the P- and S-wave arrival times of an earthquake which shakes you 1m. How far away is the earthquake epicenter and what is the magnitude? I'm stuck and would really appreciate the help! Thanks!
*April 28, 2014 by Student*

**math**

Ok.. "The strongest recorded earthquake in the world took place in Child on May 22, 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22, 1949 and occurred off the Queen Charlotte Islands. a)How ...
*April 8, 2013 by Josh*

**Computer**

Computers are classified into Four areas, please explain how they are classified?
*March 3, 2010 by Waalyn Waal*

**physics**

Elephants communicate via infrasound, at frequencies as low as 11 Hz that can travel up to 9 km. The intensity of these sounds can reach 106 dB, measured a distance of 4 m from the source. a) Determine the intensity level in W/m2 of the infrasound at 4 m from the source. b) ...
*December 1, 2014 by Haley*

**Physics**

Elephants communicate via infrasound, at frequencies as low as 11 Hz that can travel up to 9 km. The intensity of these sounds can reach 106 dB, measured a distance of 4 m from the source. a) Determine the intensity level in W/m2 of the infrasound at 4 m from the source. b) ...
*December 3, 2014 by Annie*

**Alegbra**

11. What, to the nearest tenth, will an earthquake measure on the Richter scale if it has an intensity of I = 43, 512,000 I 0?
*August 1, 2010 by Jessica*

**Algebra 2**

PLEASE HELP-DUE APRIL 5TH, 2011!!!! EARTHQUAKES an earthquake rated at 3.5 on the Richter scale is felt by many people, and an earthquake rated at 4.5 may cause local damage. The Richter scale magnitude reading m is given by m = log (base 10) x, where x represents the ...
*March 27, 2011 by Lindsey*

**Earth Science**

11. Which earthquake scale takes into consideration the damage caused by an earthquake? A. Amplitude scale B. Moment magnitude scale C. Richter scale D. Modified Mercalli scale D?
*February 13, 2015 by Sarah *

**scientist**

In 1976 a powerful earthquake hit the city of Tangshan, China. Scientists had failed to predict the earthquake. If people had paid attention to the unusual animal behavior that preceded the earthquake, however, they would have known it was coming. Animals can often sense an ...
*September 4, 2009 by Anonymous*

**math**

The strongest recorded earthquake in the world took place in Chile on May 22 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22 1949 and occurred off the Queen Charlotte Islands. (The strongest ...
*March 19, 2013 by Samantha*

**statistics**

Is the magnitude of an earthquake related to the depth below the surface at which the quake occurs? Let x be the magnitude of an earthquake (on the Richter scale), and let y be the depth (in kilometers) of the quake below the surface at the epicenter. Suppose a random sample ...
*August 20, 2010 by karen*

**adv functions**

The strongest recorded earthquake in the world took place in Chile on May 22 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22 1949 and occurred off the Queen Charlotte Islands. (The strongest ...
*March 18, 2013 by Samantha*

**physics**

Elephants communicate via infrasound, at frequencies as low as 14 Hz that can travel up to 10 km. The intensity of these sounds can reach 103 dB, measured a distance of 5.0 m from the source. Determine the intensity level of the infrasound 10 km from the source, assuming the ...
*November 24, 2014 by May*

**math30**

The 1933 earthquake in Japan registered 8.9 on the Richter scale. a.The 1985 earthquake in Peru registered 7.7 on the Richter scale. How many more times intense was the earthquake in Japan? Round your answer to one decimal place. b. What would the Richter scale reading be of ...
*July 11, 2012 by alejandro*

**Physics help!**

There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10 km. The intensity level of these sounds can reach 105 dB, measured a distance of 4.5 m from the source. Determine the intensity level of the ...
*May 7, 2013 by Abdul A.*

**geo**

I need 3 reasons why a huge earthquake wouldnt occur in NYC. I have the following points: 1) New york city doesn't lay beneath any fault lines I also said that if an earthquake were to occur, the magnitude would be on the lower end of the ritcher scale. But how would it occur ...
*September 27, 2010 by Lena*

**Precalc**

Can someone please help me? I don't know how to solve for time under 23 units. When I try I think I get the answer for above 23 units and when I try to subtract from the whole period my answer is wrong. The correct answer is 5.1337 hours. Fidel is measuring the light intensity...
*August 19, 2011 by Rose*

**Chem**

Suppose the water sample has a relatively high percent of volatile solid material. How would this have affected the reported mass of: a. dissolved solids -- too high, too low, or unaffected? Explain. TDS will be unaffected b. total solids -- too high, too low, or unaffected? ...
*September 30, 2015 by Rebecca*

**Check my work please!**

How does subduction change the ocean floor? a) subduction cause magma to accumulate on the ocean floor b) subduction causes oceanic crust to break into pieces c) subduction causes the ocean floor to sink into deep-ocean trenches d) subduction causes metamorphic rocks to form ...
*April 24, 2015 by Destiny*

**Math**

How much energy, in joules, is released by an earthquake of magnitude 3.4?
*December 14, 2013 by Clare*

**Physics**

Intensity of 4Mhz in 1.54mm = 2W/cm2 at 4cm intensity =? I know the answer is 0.32, but I do not understand why. Can you please explain? I did figure out that Attenuation= 8db. 4/2 x 4cm = 8db. Thank you in advance. I appreciate it!
*October 27, 2014 by Connie*

**science**

A _____________________ is an earthquake that occurs after a large earthquake in the same area
*February 28, 2008 by Julia*

**Math**

the odds in favor of an earthquake are 7 to 1. what is probability that an earthquake will occur? So is it 1/7 ? im confused
*August 28, 2015 by Jacqueline *

**Physics - electric field intesity (check +help)**

Points A and B are 13.0 apart. A charge of +8.0mu is placed at A and another charge at +5.0mu is placed at B. Point P i located 5.0cm from A and 12.0cm from B. What is the magnitude and direction of the electric field intensity at P? Ans: i got the magnitude as 2.9*10^, ...
*December 4, 2010 by Farah*

**physics**

A bell is rung at a sound intensity of 70dB . A trumpet is blown at an intensity that is greater by a factor of 10^3. What is the intensity level of the trumpet
*May 20, 2012 by Melissa*

**Physics/Algebra**

Physics: For a 225-watt bulb, the intensity I of light in lumens at a distance of x feet is I=225/x^2. a. What is the intensity of light 5 ft from the bulb? b. Suppose your distance from the bulb doubles. How does the intensity of the light change? Explain.
*May 1, 2014 by Sandra*

**physics**

The intensity of a certain sound wave is 6 ě W.cm2. if its intensity is raised by 20 decibels, the new intensity (in ěW/cm2) is : a. 60 b. 6.6 c. 6.06 d. 600 E. 12
*July 24, 2015 by khaled fayek*

**Science**

I need to find info. about earthquakes, such as what causes them..what are the consequences of earthquake..definition of earthquake...etc. Thank you
*May 30, 2008 by Amanda*

**Math**

What magnitude of earthquake would release energy equivalent to 35 trillion jules? I know the formula is: E= (2.5 X 10^4) X 10^1.5 X M
*October 20, 2012 by Sam*

**Earth Science **

7. The original location of an earthquake is also known as the A. hotspot. B. magnitude. C. horizon. D. epicenter.
*September 15, 2014 by jitboy*

**Earth Science**

12. The original location of an earthquake is also known as the A. horizon. B. epicenter. C. hotspot. D. magnitude. B?
*February 14, 2015 by Sarah *

**CHEMISTRY**

I also need help in this please: Suppose the original sample is unknowingly contaminated with a second anhydrous salt. Will the reported percent water in the hydrated salt be too high, too low, or unaffected by its presence? Explain. is it low? if so, can you explain in some ...
*October 6, 2015 by Diana*

**science**

what is the relationship between a one-point increase in magnitude and the amount of energy released by an earthquake?
*March 10, 2009 by gaga*

**Jones**

1. To what extent can earthquakes be predicted? 3. What can a trench dug across an active fault show about past fault movement? 4. What is a seismic gap, and what is its significance in determining future fault activity? 5. What information indicates the probable magnitude of ...
*October 10, 2010 by Joe*

**Science**

1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite B? 2. A common characteristic of mountains formed by two colliding continents is marine _______ rock. A. sedimentary B. metamorphic C. limestone D. igneous A...
*February 1, 2014 by Beatrice*

**Applied maths**

2. When light passes through a transparent medium, its intensity I at a depth d can be modelled using the equation where I0 is the initial intensity, and k is a constant. If the intensity of sunlight is reduced to 54% of its original value after penetrating through a depth of...
*February 13, 2013 by DAVID*

**Physics(Please help)**

The intensity (in W/m2) of one sound is 4.83 times as great as the intensity of another sound. Relative to the quieter sound, what is the intensity level â of the louder sound? I am not sure how to start this. Thank you.
*June 21, 2012 by Hannah*

**English**

In 1976 a powerful earthquake hit the city of Tangshan, China. Scientists had failed to predict the earthquake. If people had paid attention to the unusual animal behavior that preceded the earthquake, however, they would have known it was coming. Animals can often sense an ...
*May 7, 2009 by john browm*

**PreCalculas**

The psychological sensation of loudness B is measured in decibels and is defined with reference to the intensity, , of a barely audible sound by the following equation. In this equation, I is the intensity of the sound in question. B=10log 1/1o If the sound of a jet engine ...
*November 30, 2015 by Ryan*

**Intermediate Algebra**

The magnitude of an earthquake on the Richter scale is given by the formula R=log I, where I is the number of times more intense the quake is than the smallest measurable activity. How many times more intense i an earthquake having a richter scale number of 3.7 than the ...
*April 29, 2012 by Sarahh*

**english : CT**

In 1976 a powerful earthquake hit the city of Tangshan, China. Scientists had failed to predict the earthquake. If people had paid attention to the unusual animal behavior that preceded the earthquake, however, they would have known it was coming. Animals can often sense an ...
*March 19, 2008 by rose*