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April 25, 2015

Search: The intensity of an earthquake wave passing through the Earth is measured to be 2.0×106 J/m^2\cdot s at a distance of 58 km from the source

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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

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

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

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

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

physics
Earthquakes are motions of the earth's crust. Essentially, they are big sound waves that travel through the earth. There are two types of waves. The first type is called a longitudinal or P wave, where the earth compresses in the same direction as the wave travels. The second ...
May 9, 2013 by rohit

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

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

physics
When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a speed of about 8.0 km/s and the secondary, or S, wave has a speed of about 4.5 km/s. A seismograph, located some distance away, records the arrival of ...
December 5, 2014 by Anonymous

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 ...
April 21, 2007 by COFFEE

EARTH SCIENCE- SO STUCK
How far from an earthquake epicenter is a city where the difference between the P-wave and the S-wave arrival times is 5 minutes and 00 seconds?
January 28, 2014 by andra

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

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.

PHYSICS
A point source of a wave emits 195 watts. What is the intensity at a distance of 4.56 meters? I =
April 21, 2014 by joe

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
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
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

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 (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

physics
Earthquakes are essentially sound waves—called seismic waves—traveling through the earth. Because the earth is solid, it can support both longitudinal and transverse seismic waves. The speed of longitudinal waves, called P waves, is 7800m/s . Transverse waves, called S waves, ...
April 7, 2014 by Kate

Physics
A wave sent out from a source is reflected back to the source in 1.9x10^-3 seconds .if the velocity of the wave is 3.0x10^8 m/s, the distance of the reflecting surface from the source is ?
May 17, 2014 by Mercy

science
A sound produces an intensity of 1 W/m2 at a distance of 10 m from a source. What would be the intensity at a distance of 5 m from the source?
April 30, 2011 by Anonymous

Physics Waves
Earthquakes are essentially sound waves traveling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse seismic waves. These travel at different speeds. The speed of longitudinal waves, called P waves, is...
April 21, 2010 by Mike

physics
Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...
November 21, 2008 by Anonymous

Physics
Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...
November 22, 2010 by Stella

Physics
Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...
November 23, 2010 by Patrick

Physics
Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...
November 23, 2010 by Mike

Physics HELP!!
Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...
November 21, 2012 by sarah

Phsyics Waves
Earthquakes are essentially sound waves traveling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse seismic waves. These travel at different speeds. The speed of longitudinal waves, called P waves, is ...
April 25, 2010 by Michael Moskvich

Physics
A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 100 dB. At what distance from the source is the intensity level 40 dB? When I set it up as 100dB/40dB = r^2/(12m)^2, and got x = 18.97 meters, i was told this ...
October 22, 2013 by T

Physics
A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 100 dB. At what distance from the source is the intensity level 40 dB? When I set it up as 100dB/40dB = r^2/(12m)^2, and got x = 18.97 meters, i was told this ...
October 22, 2013 by T

Physics
A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 100 dB. At what distance from the source is the intensity level 40 dB? When I set it up as 100dB/40dB = r^2/(12m)^2, and got x = 18.97 meters, i was told this ...
October 22, 2013 by T

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

earth sceince
Which of the following statements is TRUE? S-waves are able to pass through the Earth's core. Continental-continental plate convergence is reponsible for the creation of mountain ranges. Oceanic crust is on average about 60 - 100 km thick. The Richter Scale measures earthquake...
October 10, 2008 by Deborah

physics
please help with either or both 1. a charge of 10C is passing in 2 second through a cross sectional area of a conductor. calculate the intensity of magnetic field at a distance of 10 cm from the conductor. 2. An amount of 3X10^20 electrons is passing in a conductor in 2 ms. ...
April 22, 2009 by jaden

Algebra II
The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely proportional to the square of the distance from the light source. If a desk is properly illuminated by a 74.0 w lamp 8.00 ft from the desk, what size lamp...
November 21, 2011 by Zach

Algebra II
The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely proportional to the square of the distance from the light source. If a desk is properly illuminated by a 74.0 w lamp 8.00 ft from the desk, what size lamp...
November 22, 2011 by Ashley

Algebra II
The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely proportional to the square of the distance from the light source. If a desk is properly illuminated by a 74.0 w lamp 8.00 ft from the desk, what size ...
November 22, 2011 by Marie

Math
The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely proportional to the square of the distance from the light source. If a desk is properly illuminated by a 74.0 w lamp 8.00 ft from the desk, what size lamp...
November 22, 2011 by Jake

Physics
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.89 x 10-6 W/m2 at a distance of 127 m from the explosion. Find the distance (in m) from the source at which the intensity is 1.56 x 10-6...
December 5, 2006 by Jena

physics
At a distance of 1 cm from the source, the flux from the isotropic source is one hundred times brighter. Which source is brighter fifty centimeters away? At what distance from the source are the two equally bright? Could you explain the theory behind the answers too? Isn't the...
October 17, 2014 by Jeremy

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

Physics
A 100 watt bulb emits light in all directions. The distance R from the bulb is equal to 1.0 meter. Complete the table below with calculated values of intensity of the bulb. Distance from Source Intensity (W/m2) R ? 2R ? 3R ? c) If the bulb was replaced by a 75 watt bulb, at ...
March 5, 2013 by Alex

Physics
This time I have two questions: #1.A recording engineer works in a soundproofed room that is 49.7 dB quieter than the outside. If the sound intensity in the room is 2.66 x 10-10 W/m2, what is the intensity outside? #2.A listener increases his distance from a sound source by a ...
December 5, 2006 by Jena

Physics: Wave Motion
A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker move? (b) With what ...
November 27, 2012 by Raj Phys27/11

Physics:Wave Motion
A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker move? (b) With what ...
November 28, 2012 by RajuPhys

Physics
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 3.14 x 10-6 W/m2 at a distance of 121 m from the explosion. Find the distance (in m) from the source at which the intensity is 1.80 x 10-6...
March 3, 2013 by Tim

physics
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 1.90 10-6 W/m2 at a distance of 120 m from the explosion. Find the distance from the source at which the intensity is 0.80 10−6 W/m2.
December 3, 2011 by Anonymous

physics
A sound wave with intensity 37 mW/m2 interferes constructively with a sound wave that has an intensity of 18 mW/m2. What is the intensity of the superposition of the two?
April 10, 2012 by opp

earth science please help ....
How would the seperation between the p wave and s wave arrival at Savannah, GA compare to the data from the seismograph recorded in chicago, Il. the recorded for the chicago is: CHicago: P wave arrival time: 08:57:45 pm s wave arrival time: 09:02:05 pm difference in arrival ...
January 19, 2009 by Anonymous

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??
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
February 14, 2011 by Gina

physics
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
February 23, 2011 by heather

Physics
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated...
March 3, 2008 by Zach

physics
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the speed and centripetal acceleration of a person ...
July 1, 2013 by brandan

Physics
The distance between two consecutive nodes of a standing wave is 19.2 cm. The hand generating the pulses moves up and down through a complete cycle 2.59 times every 7.44 s. Find the velocity of the wave. Answer in units of m/s.
March 11, 2015 by Lauren

physics
The distance between two consecutive nodes of a standing wave is 22 cm. The hand generating the pulses moves up and down through a complete cycle 3.89 times every 4.68 s. Find the velocity of the wave. Answer in units of m/s
March 17, 2015 by d

physics
A stereo speaker emits sound waves with a power output of 100W. (a) find the intensity 10.0m from the source. B) find the intensity level in decibels, at this distance. C) at what distance would you experience the sound at the threshold of pain,120dB?
April 10, 2007 by sammy

Physics circular motion
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
February 15, 2011 by Gina

Physics
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated ...
November 6, 2012 by Don

Physics
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated ...
November 6, 2012 by Don

physics
The intensity of sound is x W/m2 at a distance of 5 m from the source. What is the intensity of the sound at a distance of 20 m from the source?
April 13, 2011 by ashley --

Physics
Exploration 3: A Moving Source at Different Velocities Procedure 1. Set Wave speed to 10.0 cm/s and Source frequency to 1.0 Hz. Place the detector anywhere. 2. Set Source speed to 6.0 cm/s. Select Go. Sketch the resulting wave-front pattern on a separate sheet of paper. 3. ...
July 19, 2012 by Alfrieda

Advanced Functions - Grade 12
Radiation from the sun keeps us alive, but with the thinning of the ozone layer, it is important to limit exposure. Most of us know that the sun is far more intense at the equator than at the poles. The relationship between the intensity of radiation with respect to the ...
July 20, 2010 by Nish

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

Physic
The distance between two nearest nodes of a standing wave is 17.3 cm. Hand generated pulses move up and down through a complete cycle four times every seven seconds. Find the velocity of the wave. Answer in units of m/s.
September 23, 2014 by Anonymous

physic
The distance between two nearest nodes of a standing wave is 16.3 cm. Hand generated pulses move up and down through a complete cycle four times every seven seconds. Find the velocity of the wave. Answer in units of m/s.
September 23, 2014 by Anonymous

physics
The distance between two nearest nodes of a standing wave is 22.9 cm. Hand generated pulses move up and down through a complete cycle five times every seven seconds. Find the velocity of the wave. Answer in units of m/s
October 19, 2014 by Anonymous

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

Calculus Physics
Imagine a spaceship on its way to the moon from the earth. Find the point, as measured from the center of the earth, where the force of gravity due to the earth is balanced exactly by the gravity of the moon. This point lies on a line between the centers of the earth and the ...
March 2, 2015 by danny

Physics
A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker move? (b) With what ...
November 27, 2012 by Raj Phys27/11

Physics
A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker move? (b) With what ...
November 27, 2012 by Raju

Physics
A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker move? (b) With what ...
November 27, 2012 by Raju

Physics(Please respond)
A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source, the intensity of the sound is 1.7 × 10-3 W/m2. What is the total sound power P emitted by the source? Would I do 1.7e^-3 (12) ?
June 20, 2012 by Hannah

Physics Please check my answers
A sound of 7 kHz frequency is well within the normal hearing range of most people. True. False. << 2. Sound is a transverse compression wave. True. False.<< 3. The decibel level of a sound can have a negative value. True.<< False. 4. The Doppler effect occurs...
February 4, 2014 by Chelsea

physics
A longitudinal wave spreads radially from a source with power 345 W. What is the intensity 40.0 meters away? answer in W/m^2.
April 4, 2011 by sabeen

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

Intergarted Science
I had a couple of questions on the topic of Waves-Sound and Light. 1. What is the source of all waves? *Vibration* 2. In one word, what is it that moves from source to receiver in a wave motion? *Energy* 3. Does the medium in which a wave travels move with the wave? *No* 4. ...
January 7, 2010 by Jordan

physic
How long will a radio wave, with a wave length of 200 m takes to travel to and for the moon from the earth? (Distance of moon from earth = 3.9 x 108 m)
March 27, 2011 by yumina

Physics
The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average distance between the earth and the sun is 1.50E11 m. What is the average power emitted by the Sun? Ok so intensity is power over area. so power is ...
November 15, 2011 by Raquel

Waves-Science
I had a couple of questions on the topic of Waves-Sound and Light. 1. What is the source of all waves? *Vibration* 2. In one word, what is it that moves from source to receiver in a wave motion? *Energy* 3. Does the medium in which a wave travels move with the wave? *No* 4. ...
January 7, 2010 by Jordan

Physics
A person is initially 8 m from a point sound source which emits energy uniformly in all direction at a constant rate. If the intensity of the source is to be halved but the sound is to be as loud as before, what distance should the person be from the source? Ans: 4 square root...
June 5, 2014 by Ariana

physics
At a distance of 7.5 m from a point sound source, the sound intensity level is 105 dB. At what distance is the intensity level 90 dB?
April 13, 2012 by Anonymous

physics
An electronic point source emits sound isotropically at a frequency of 3000 Hz and a power of 34 watts. A small microphone has an area of 0.75 cm2 and is located 158 meters from the point source. a) What is the sound intensity at the microphone ? To find intensity i tried I=...
April 21, 2010 by caleb

Physics
The speed of longitudinal waves, called P waves, is 7274.0 m/s. Transverse waves, called S waves, travel at a slower 3803.0 m/s. A seismograph records the two waves from a distant earthquake. If the S wave arrives 4.47 min after the P wave, how far away was the earthquake?
November 23, 2010 by Pete

physics
Find the distance (measured in earth radii, RE) from the center of the earth to a point outside the earth where the acceleration of gravity due to the earth is exactly one ninth of its value on the surface of the earth.
April 24, 2010 by Muhammad

Earth Science
Where a major earthquake has happened in the past, but not in a while, is called a seismic? a)gap b)wave c)fault d)scale
December 7, 2009 by george

Physics
The intensity of sound from a source is measured at two points along a line from the source. The points are separated by 14.7 m, the sound level is 67.10 dB at the first point and 55.68 dB at the second point. How far is the source from the first point?
November 27, 2008 by Shaniquaa

alg
Sound intensity (loudness) varies inversely as the square of the distance from the source. If a rock band has a sound intensity of 100 decibels 25 feet away from the amplifier, find the sound intensity 50 feet away from the amplifier.
April 4, 2014 by f

Calculus
Determine the equation of the line described by the given information. a) slope -2/3, passing through (0,6) b) passing through points (2,7) and (6,11) c) parallel to y=4x-6 passing through point (2,6)
February 8, 2012 by Jake

physics
n object is dropped from rest from a height 5.8 × 106 m above the surface of the earth. If there is no air resistance, what is its speed when it strikes the earth? The acceleration of gravity is 9.81 m/s2 and the radius of the Earth is 6.37 × 106 m. Answer in units of km/s.
April 5, 2011 by donna

Physics
Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 multiplied by 108 m and Earth's radius is 6.37 ...
November 9, 2009 by Ray

Physical science
A wave travels along a string at a speed of 1,5m 1s.if the frequency of the source of the wave is 7,5hz,calculate:(a)the wavelength of the wave..(b)the period of the wave
April 18, 2012 by Brydley

physics help please!
A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force exerted on the spacecraft by the earth balance that exerted by the moon? This point lies on a line between the centers of the earth and the moon. The...
February 10, 2011 by Hannah

physics
A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force exerted on the spacecraft by the earth balance that exerted by the moon? This point lies on a line between the centers of the earth and the moon. The...
February 12, 2013 by Dee

Physics Classical Mechanics
The mean distance from the center of the earth to the center of the moon is rem = 3.84 × 108 m. The mass of the earth is me = 5.98 × 1024 kg and the mass of the moon is mm = 7.34 × 1022 kg. The mean radius of the earth is re = 6.37 × 106 m. The mean radius of the moon is rm = ...
October 28, 2013 by Anonymous

physics please help!!
A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.90 106 m/s. Relative to the center, the tangential speed is vT = 3.00 105 m/s for locations A and B, ...
March 27, 2012 by linds

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

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