Friday

April 18, 2014

April 18, 2014

Number of results: 36,042

**science**

explain how an magnitude of 8.0 earthquake could be classified as a low intensity
*Sunday, February 13, 2011 at 8:40pm by Anonymous*

**science**

Please try some of the following links: http://search.yahoo.com/search?fr=mcafee&p=how+an+magnitude+of+8.0+earthquake+could+be+classified+as+a+low+intensity+ Sra
*Sunday, February 13, 2011 at 8:40pm by SraJMcGin*

**science**

how does a magnitude-8.0 earthquake could be classified as a low-intensity earthquake? LAST SCIENCE QUESTION!
*Wednesday, April 1, 2009 at 5:44pm by Sara*

**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 ...
*Wednesday, May 8, 2013 at 8:38pm 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).
*Wednesday, December 4, 2013 at 7:37pm 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?
*Wednesday, December 4, 2013 at 8:39pm 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
*Wednesday, November 7, 2012 at 5:24pm 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
*Monday, December 7, 2009 at 11:21pm 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
*Tuesday, September 16, 2008 at 4:59am by AK*

**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 ...
*Sunday, February 9, 2014 at 8:49pm by nicey*

**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 ...
*Monday, December 21, 2009 at 1:55am by Andy*

**math**

An earthquake has a magnitude of 6.7 on the Richter Scale.Find the intensity.
*Saturday, December 3, 2011 at 5:22pm by Earthquakes*

**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
*Wednesday, February 14, 2007 at 9:42am by Jen*

**Logarithmic Scales**

In 1995, Japan had an earthquake of magnitude 7.2. What is the magnitude of an earthquake that is twice as intense?
*Wednesday, March 28, 2012 at 11:26pm by Anonymous*

**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 ...
*Tuesday, February 5, 2008 at 10:14pm by Jaylin*

**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...
*Tuesday, September 28, 2010 at 12:45am by Lena*

**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?
*Wednesday, August 27, 2008 at 9:43pm 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?
*Saturday, November 12, 2011 at 10:04pm by Nabil*

**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 ...
*Friday, February 11, 2011 at 11:25pm by Reed*

**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?
*Sunday, February 28, 2010 at 2:19pm by Janet*

**Science**

Which scale measures the amount of damage after an earthquake? Richter scale Mercalli intensity scale moment magnitude scale seismograph scale
*Monday, December 7, 2009 at 5:13pm 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?
*Sunday, February 28, 2010 at 3:17pm by Janet*

**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 ...
*Sunday, February 28, 2010 at 7:24pm 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 ...
*Sunday, February 28, 2010 at 8:18pm by Janet*

**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 ...
*Tuesday, January 13, 2009 at 10:05pm by Anonymous*

**MATH**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 4.3 102µm. Find this earthquake's magnitude.
*Friday, February 8, 2013 at 1:04pm by TONYA*

**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.
*Monday, November 11, 2013 at 11:12pm 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.
*Tuesday, November 12, 2013 at 1:02am by Anonymous*

**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 ...
*Sunday, February 28, 2010 at 5:34pm by Janet*

**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 ...
*Tuesday, September 4, 2012 at 10:24pm by Amy*

**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.
*Thursday, September 1, 2011 at 2:32pm 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.
*Saturday, October 29, 2011 at 7:42pm 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.
*Sunday, October 30, 2011 at 4:34am by suzie*

**Physics**

Earthquake wave attenuation depends upon the wave type. They are also attenuated by heating. Some propagate along the surface and some do not go through water. The intensity does not in general follow an inverse square law reduction in intensity. This is an ill-advised ...
*Sunday, January 31, 2010 at 9:27pm by drwls*

**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.
*Monday, March 12, 2012 at 2:19pm by sue*

**Science(Urgent)**

You should find information here: http://www.google.com/search?q=how+much+more+energy+is+released+by+a+5.0+magnitude+earthquake+than+a+4.0++magnitude+earthquake&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a Sra
*Sunday, February 28, 2010 at 8:18pm by SraJMcGin*

**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 ...
*Tuesday, March 17, 2009 at 8:29pm by Angie*

**math**

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.)
*Wednesday, September 22, 2010 at 9:03pm by jamie*

**math**

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.)
*Monday, November 1, 2010 at 10:43am by calvin*

**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.)
*Sunday, December 18, 2011 at 8:02pm 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 =
*Monday, January 23, 2012 at 1:18pm 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.)
*Friday, July 20, 2012 at 9:35am by Paul*

**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)
*Sunday, November 4, 2012 at 3:54pm by TEDDY *

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.4 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.
*Saturday, November 3, 2012 at 9:31pm by Anonymous*

**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 =
*Thursday, October 20, 2011 at 2:29pm by Anonymous*

**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.)
*Monday, April 16, 2012 at 10:36am 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.)
*Monday, April 16, 2012 at 2:16pm 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 =
*Wednesday, April 25, 2012 at 8:44pm by Randy*

**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.)
*Saturday, November 3, 2012 at 8:10pm by Renee Tyler*

**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 ?
*Friday, January 25, 2013 at 1:16pm by Chris*

**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... ...
*Tuesday, December 11, 2007 at 10:30pm 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.)
*Friday, January 20, 2012 at 12:07am by Sandra Beasley*

**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 ...
*Tuesday, February 18, 2014 at 7:50am by victoria *

**Computer**

Computers are classified into Four areas, please explain how they are classified?
*Wednesday, March 3, 2010 at 8:57pm by Waalyn Waal*

**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?
*Thursday, December 2, 2010 at 10:07pm by Jake*

**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?
*Sunday, November 30, 2008 at 9:18am by Sandhya*

**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 ...
*Monday, April 8, 2013 at 12:25am by Josh*

**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 ...
*Tuesday, April 27, 2010 at 10:33am by Anonymous*

**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 ...
*Sunday, January 31, 2010 at 9:27pm by Eric*

**Pre-Calculus**

Your "x0 i 1 miron 0.001mm" is unintelligible. Please make sure you typed the question correctly. Since the Richter scale is a logarithmic one, the answer to (b) is obviously "no". A magnitude 4 earthquake causes very little damage, even near the epicenter. A magnitude 8 ...
*Monday, December 21, 2009 at 1:55am by drwls*

**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 ...
*Friday, August 20, 2010 at 4:17pm by karen*

**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 ...
*Sunday, March 27, 2011 at 2:46pm by Lindsey*

**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 ...
*Tuesday, March 19, 2013 at 4:33pm by Samantha*

**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?
*Sunday, August 1, 2010 at 9:45am by Jessica*

**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 ...
*Monday, March 18, 2013 at 10:29pm by Samantha*

**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 ...
*Friday, September 4, 2009 at 9:49pm by Anonymous*

**Earthquakes**

Try here: http://search.yahoo.com/search?fr=mcafee&p=what+determines+the+magnitude+of+an+earthquake Sra
*Tuesday, September 28, 2010 at 12:45am by SraJMcGin*

**english critical th.**

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 ...
*Wednesday, March 19, 2008 at 11:00pm by Anonymous*

**Math - Working with Logs!!**

In 1935 C.F. Richter set up the scale of earthquakes by R = log(I) where R is the Richter scale number and I is the intensity of the earthquake so from your data 5 = log(I) I = 10^5 so an earthquake 3 times as intense would be 3I so multiplying the above equation by 3 3I = 3(...
*Tuesday, December 11, 2007 at 10:30pm by Reiny*

**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 ...
*Wednesday, July 11, 2012 at 12:48pm by alejandro*

**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 ...
*Monday, September 27, 2010 at 9:49pm by Lena*

**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^, ...
*Saturday, December 4, 2010 at 3:50pm by Farah*

**science 6th grade**

Please try some of the following links: http://search.yahoo.com/search?fr=mcafee&p=how+the+moment+magnitude+and+Richter+scales+of+earthquake+measurement+are+similar+and+how+they+are+differe Sra
*Friday, February 11, 2011 at 11:25pm by SraJMcGin*

**Math**

How much energy, in joules, is released by an earthquake of magnitude 3.4?
*Saturday, December 14, 2013 at 7:59pm by Clare*

**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
*Sunday, May 20, 2012 at 9:42pm by Melissa*

**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 ...
*Tuesday, May 7, 2013 at 8:10pm by Abdul A.*

**arithmetic**

Your teacher probably wants 3^2 or 9 times. It depends on the unit of measure you are using for "as strong"...power intensity, Electric field intensity, Magnetic Field intensity. And, there are logrithmic measures for all of these two. But if you consider just energy spreading...
*Sunday, April 3, 2011 at 2:47pm by bobpursley*

**science**

what is the relationship between a one-point increase in magnitude and the amount of energy released by an earthquake?
*Tuesday, March 10, 2009 at 7:10pm by gaga*

**Disaster planning**

You must be go to that place where Earthquake affect many year. You must be know some rules of Earthquake. Earthquake is such type of disaster that have no alarming system. We have some but it was not enough. We can alarm before few second.
*Sunday, June 1, 2008 at 1:36pm by syadur*

**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...
*Friday, August 19, 2011 at 2:22am by Rose*

**science**

A _____________________ is an earthquake that occurs after a large earthquake in the same area
*Thursday, February 28, 2008 at 6:29pm by Julia*

**science**

10 times. An earthquake with a magnitude of 5.0 is 10 times weaker than one with a magnitude of 6.0 and 100 times weaker than one with a magnitude of 7.0.
*Tuesday, March 10, 2009 at 7:10pm by DrBob222*

**Science**

If a earthquake startes at 9:07p.m. and ends at 9:12p.m. what is the distance the earthquake travel?
*Monday, May 3, 2010 at 9:41pm by Elijah Pingleton*

**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.
*Thursday, June 21, 2012 at 6:47pm by Hannah*

**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
*Friday, May 30, 2008 at 9:33pm by Amanda*

**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...
*Wednesday, February 13, 2013 at 7:09pm by DAVID*

**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 ...
*Sunday, October 10, 2010 at 7:38pm 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...
*Saturday, February 1, 2014 at 3:54pm by Beatrice*

**Physics**

Intensity(1) x Area(1) = Intensity(2) x Area(2) 109.7 x (pi(26.8)^2) = Intesity(2) x (pi(8500)^2) Intensity(2) = 1.09 x 10^-3
*Monday, November 22, 2010 at 3:32pm by Claudia*

**Physics**

At a distance of 30 m the noise from the engine of an jet has an intensity of 130 dB. At this level, you will be in pain and your ears will hurt. That's why this intensity is know as the "pain threshold". How far do you have to be from a jet (total distance), in order for the ...
*Friday, January 22, 2010 at 12:53am by Intensity*

**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 ...
*Sunday, April 29, 2012 at 5:51pm by Sarahh*

**Science: Earthquakes**

The question seems to be asking about what happens after the actual earthquake. One of the effects of the 1906 San Francisco earthquake was that gas mains broke, resulting in huge fires that just about destroyed the city. An effect of the 1989 earthquake in the same area was ...
*Tuesday, October 23, 2007 at 5:03pm by Ms. Sue*

**Physics**

1. What is the intensity of a sound at the pain level of 120 dB? 2. What is the intensity level of a sound whose intensity is 2.0 x 10^-6 W/m^2?
*Saturday, May 29, 2010 at 11:14am by Amber*

**geo**

Just to clarify i watch the movie aftershock: earthquake in new york, and i have to state whether i think that the movie was scientifically accurate or not. I said it was not and I said the reason for that were that new york is not on any fault lines. I need 2 more points as ...
*Monday, September 27, 2010 at 9:49pm by Lena*

**math**

a seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.5 *10^2,find the earthquakes magnitude. round one decimal
*Saturday, February 15, 2014 at 5:21pm by evelyn*

**physics**

which way do electric-field lines point, from high to low potential or from low to high? Explain please
*Thursday, February 7, 2013 at 5:16pm by julie*

**HARD PHYSICS**

which way do electric-field lines point, from high to low potential or from low to high? Explain please
*Thursday, February 7, 2013 at 10:15pm by James*

**math**

after passing therough a material t centimeters thick, the intensity I(t) of a light beam is given by I(t) =(4^-ct)Io, where Io is the initial intensity and c is a constant called the absorption factor. Ocean water absorbs light with an absorption factor of c= .0101. at what ...
*Friday, February 24, 2012 at 5:47pm by Suzie*

**physics - sound level**

The source of a sound wave has a power of 2.50 µW. Assume it is a point source. (a) What is the intensity 6.70 m away? I used I = Power / 4*pi*r^2 and found I to be 4.43x10^-9 W/m^2 (b) What is the sound level at that distance? Sound level = 10 dB*log [(Intensity)/(Intensity ...
*Saturday, April 21, 2007 at 12:54am by COFFEE*

**critical thinking**

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 ...
*Thursday, September 11, 2008 at 9:46pm by d*

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