Sunday

December 21, 2014

December 21, 2014

Number of results: 2,332

**Geometric & Wave Optics**

An astronomical telescope consists an objective of focal lenght 100cm and an eyepiece of focal lenght 8cm. calculate the angular magnification of the telescope and also determine the distance between the two lenses.
*July 24, 2009 by Matrix School 1*

**Geometric & Wave Optics**

when an object is placed 10cm away from a lens; it is found that the formed is 6cm behind the object on the same side of the lens. Determine the focal lenght of the lens. solution 1/v + 1/u = 1/f u=10cm, v=6cm, f=? 6+10/60 = 1/f 70/60 = 1/f by cross multiply we have 70 x f = ...
*July 22, 2009 by Matrix School 2*

**Geometric & Wave Optics Correction**

when an object is placed 10cm away from a lens; it is found that the formed is 6cm behind the object on the same side of the lens. Determine the focal lenght of the lens. solution 1/v + 1/u = 1/f u=10cm, v=6cm, f=? 6+10/60 = 1/f 70/60 = 1/f by cross multiply we have 70 x f = ...
*July 22, 2009 by Matrix School 2*

**Physics**

What do u mean by phase in wave optics??
*June 15, 2012 by Abhi*

**Geometric & Wave Optics**

A beam of light wavelenght 560 to availing in air is incident on a surface of a transparent material. The incident beam makes an angle of 65degree with the normal and the refracted beam makes an angle of 45degree with the normal. calculate the refractive index of the material.
*July 21, 2009 by Matrix School 2*

**optics**

I want to substitude the ray optics analysis with what are the resultant waves that happen. I say "resultant" because many waves that would exist if they were alone, as they are not alone, after their superposition with the other waves become some resultant waves which are not...
*May 13, 2011 by Theodore*

**Science**

1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? (1 point) a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B Is it C?
*March 5, 2014 by Ashley*

**physics**

show that 1/sqrt(Msubscript 0 Esubscript 0)=C...I dont understand how to show this or what this question is asking..its for wave optics
*April 29, 2008 by Jessica*

**Science**

Which type of seismic wave causes rock particles to move in the same direction as the wave movement? a. P-wave b. S-wave c. tension wave d. shear wave
*March 10, 2009 by Angie*

**Physics**

Subject: Light and Geometric Optics Question: Where must a light source be placed in front of a concave mirror for a) light energy to be concentrated to a single point b)the light to be reflected in a parallel beam?
*May 22, 2010 by Emily*

**physics**

A wave on a string has a wave function given by y(x, t) = (0.0210 m)sin[(6.91 m^−1)x + (2.38 s^−1)t . (a) What is the amplitude of the wave? (b) What is the period of the wave? (c) What is the wavelength of the wave? (d) What is the speed of the wave?
*July 19, 2012 by lanre*

**Geology**

I am totally confused, need to come up with the Arrival Time of P Wave, S Wave Love Wave and Rayleigh Wave and distance from epicenter for LA and Austin when I am only supplied with the following info for Urbana: 3400 miles from Epicenter P Wave arrive 05:44:00 S wave arrive ...
*June 27, 2011 by Carlene*

**Physics**

The following wave function represents a travelling wave: y = 5.35 / [4.95 + (6.55x+2.15 t )2] where y and x are in cm, and t is in seconds.a) What is the maximum displacement of the wave at t = 4.30 s ? b)What is the wave velocity?
*January 11, 2011 by Rody*

**Physics**

The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m. 2) What is the wavelength of the wave? 3)What is the frequency of the wave?
*November 23, 2010 by Patrick*

**Algebra help PLEASE? **

14, 8, -16, 32... Arithmatic. 64, 128, 256 geometric, -64, 128, -256 geometric, -48, 64, -80*** the sequence is neither geometric nor arithmatic 81, 27, 9, 3.. aruthmatic , 0,-3,-6 geometric, 0,-3,-6 geometric, 1, 1/3, 1/9
*April 21, 2014 by Aniston*

**Geo. & Wave Optics**

An astronomical telescope consists an objective of focal lenght 100cm and an eyepiece of focal lenght 8cm. calculate the angular magnification of the telescope and also determine the distance between the two lenses.
*July 23, 2009 by Matrix School 2*

**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!!**

The wave is travelling to the right at 18.2m/s. What is the amplitude if the maximum displacement is 19.9cm and the total distance travelled by the wave is 41.2m? b) What is the wavelength of the wave? c).What is the frequency of the wave?
*November 24, 2012 by joane *

**Physics-help please!**

A wave on a rope is 6.1m . a.) What is the wavelength of this wave? b.) If the frequency of the wave is 6.2Hz, what is the wave velocity?
*August 4, 2014 by Anonymous*

**Science**

When a sound wave passes from air into a solid object, which of the following wave properties change? -frequency -wave speed -amplitude -wave length Can be more than one
*November 10, 2011 by Logan*

**Physics**

Two waves are combined to form this standing wave equation of y(x,t) = (3 mm)sin[x/(2 m]cos[(100 rad/s)t] a. What's the amplitude of the right moving wave and left moving wave? b. What's the wavelength of the right moving wave and left moving wave? c. What's the velocity of ...
*February 11, 2011 by Dan*

**Physics**

Two waves are combined to form this standing wave equation of y(x,t) = (3 mm)sin[x/(2 m]cos[(100 rad/s)t] a. What's the amplitude of the right moving wave and left moving wave? b. What's the wavelength of the right moving wave and left moving wave? c. What's the velocity of ...
*February 11, 2011 by Alan*

**laser optics**

what is laser optics, how laser optics work?
*May 31, 2008 by serdar*

**algebra**

Determine whether each sequence is arithmetic or geometric. Find the next three terms. 4, 8, 16, 32, . . . A.arithmetic, 64, 128, 256 B.geometric, 64, 128, 256 C.geometric, 48, 64, 80 .DThe sequence is neither geometric nor arithmetic. I think it's B...? 81, 27, 9, 3...
*March 19, 2013 by Cassie*

**Science**

P: If wave a has an amplitude of 3 meters then inteferes wiht wave b that has an amplitude of 2 meters. the sum of te waves produce wave c with 5 meters Q:what is the wave interaction explain? P<S: I really want to know what are the 4 basic types of wave interections. Thank...
*October 3, 2010 by Jacytiopa*

**physics**

The figure below represents a periodic wave. Each increment on the equilibrium line is 760 cm. What is the wavelength for this wave (in m)?If the wave in the figure above has a frequency of 60 Hz, what is the wave's speed?
*May 2, 2011 by Joan*

**Physics HELP!!**

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 18.2m/s. What is the amplitude if the maximum displacement is 19.9cm and the total distance travelled by the wave is 41.2m? b). What is the wavelength of the wave?
*November 24, 2012 by joane *

**Science**

P: If wave a has an amplitude of 3 meters then inteferes wiht wave b that has an amplitude of 2 meters. the sum of te waves produce wave c with 5 meters Q:what is the wave interaction explain? Also m,ay you explain what destructive inteference is and constructive interference...
*October 3, 2010 by Jacytiopa*

**physics**

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the ...
*October 24, 2011 by maria*

**physics**

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the ...
*October 24, 2011 by maria*

**physics**

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the ...
*October 25, 2011 by maria*

**university**

A surfer is catching a wave. Suppose she starts at the top of a wave with a speed of 1.37 m/s and moves down the wave until her speed increases to 9.90 m/s. The drop in her vertical height is 2.64 m. If her mass is 63.3 kg, how much work is done by the (nonconservative) force ...
*November 22, 2011 by nelson*

**Physics**

A surfer is catching a wave. Suppose she starts at the top of the wave with a speed of 1.3 m/s and moves down the wave until her speed increases to 8.0 m/s. The drop in her vertical height is 2.8 m. If her mass is 59 kg, how much work is done by the (nonconservative) force of ...
*October 15, 2012 by Sam*

**physics**

A plane progressive wave is represented by the wave equation: y=0.1sin(200 št-20šx/17) Where y is in millimetres, t is in seconds, and x is the distance from a fixed origin, O, in metres. Find: The frequency of the wave The wavelength of the wave The speed of the wave ...
*May 11, 2013 by rare*

**science**

A bird sits on a pole and watches waves. The wave crests are 1.0 meter apart. If one wave crest passes the pole each second, what is the speed of the wave? . What is the period of the wave? . What is the frequency of the wave? . If the waves change so that the distance between...
*February 6, 2011 by mary*

**physical science**

A disturbance sends ripples across water in a tub. These ripples are an example of a? rarefaction longitude wave compression surface wave (my choice) Sound is an example of what kind of wave? transverse wave longitude wave surface wave wavelength (my choice) Waves carry -- ...
*April 12, 2012 by kevin*

**physics please helpp **

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the ...
*October 24, 2011 by maria*

**Precalc/Trig**

wave is modeled by the function ... h(t) = 3cos(p/10)*t What is the period of the wave (T) *frequency (F) is defined as the number of cycles of the motion per second. What is the relationship between F and T? Find the wave height (H) which is the vertical distance between the ...
*September 26, 2012 by George*

**7th Grade Math for Steve.. or Ms. Sue**

Determine whether each sequence is arithmetic or geometric. Find the next three terms. 1. 14, 19, 24, 29, . . . (1 point) geometric, 34, 39, 44 arithmetic, 32, 36, 41 arithmetic, 34, 39, 44 ** The sequence is neither geometric nor arithmetic. 2. 4, 8, 16, 32, . . . (1 point...
*April 28, 2013 by Gabby*

**science**

two waves are traveling through the a container ofnitrogen . the amplitude of the first wave is .3 cm and the amplitude of the second wave is .9 cm. what is true about the two waves? a. the energy of the first wave is less than the second wave. b. the energy of the first wave ...
*March 16, 2013 by mary*

**Please help check physical science!**

Please help check my answers I really want to make a 100%! 1. A mechanical wave moves through a medium, which can be (1 point) A. a liquid. B. a solid. C. a gas. D. all of the above <-- This one 2. Which type of kind of wave causes the medium to vibrate only in a direction ...
*March 6, 2013 by Matthew*

**Physics**

A sine wave is traveling to the right on a cord. The lighter line in the figure represents the shape of the cord at time t = 0; the darker line represents the shape of the cord at time t = 0.10 s. (Note that the horizontal and vertical scales are different.) (a) What is the ...
*April 17, 2012 by Amy*

**College Physics**

A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. a. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude? b. What is the intensity of the wave at 5 km? c. What is the wavelength of the ...
*April 4, 2012 by charlie*

**physics**

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 32.0 m/s. a) What is the amplitude if the maximum displacement is 28.0 cm and the total distance travelled by the wave is 26.0 m? b)What is the wavelength of the wave? c)What is the ...
*November 21, 2008 by Anonymous*

**math**

Determine whether each sequence is arithmetic or geometric. Find the next three terms. 1. 14, 19, 24, 29, . . . (1 point) geometric, 34, 39, 44 arithmetic, 32, 36, 41 arithmetic, 34, 39, 44 *** The sequence is neither geometric nor arithmetic. 2. 4, 8, 16, 32, . . . (1 point...
*May 2, 2014 by TTR+S<3*

**Physics**

Two nearby nodes of a standing wave are separated by 4.5 m. If the frequency of the wave is 184 Hz, what is the speed of the wave?
*November 14, 2011 by Anon*

**Physics !>:(**

A wave has angular frequency 46.2rad/s and wavelength 3.57m. What is its wave number? b).What is its wave speed?
*November 24, 2012 by joane *

**physics**

An ocean wave has a length of 12.0 m. A wave passes a fixed location every 2.0 s. What is the speed of the wave?
*February 1, 2013 by noah*

**science**

why is the arrival time for the p-wave always earlier than the arrival of the s-wave the same seismograph station? is it because the p wave always reaches before the s- wave.
*January 19, 2009 by Anonymous*

**physics**

The following wave function represents a travelling wave: y = 3.45 / [6.35 + (6.35x−8.30 t )2] where y and x are in cm, and t is in seconds.a) What is the maximum displacement of the wave at t = 7.50 s ? b) what is the velocity.
*January 10, 2011 by mike *

**physics**

An ocean wave travels 17.1 m in 6.7 s. The distance between the two nearest wave crests is 5.1 m. What is the frequency of the wave? Answer in units of H
*March 4, 2013 by hannah *

**physics**

Identify the area of physics that is most relevant to each of the following situations. Explain your reasoning. a. a high school football game b. food preperation for the prom c. playing in the school band d. lightning in a thunderstorm e. wearing a pair of sunglasses outside ...
*August 21, 2006 by Anonymous*

**Physics**

A traveling wave has displacement D(x,t)=(3.00cm)sin(5.36x-6.71t), where x is in meters and t is in seconds. What is the wave speed of this wave? **snapshot graph at t=1/4 s
*November 21, 2012 by rory*

**science- physics**

when a wave strikes a boundary that is less dense than the original wave medium, the wave comes back a) upright b)inverted thank you!
*February 11, 2014 by lauren*

**PHYSICS **

A wave on a string is described by the relation y = A sin(30t - 0.041x), where t is measured in seconds and x in meters, with A = 0.16 m. (a)Find the frequency of the wave. ____Hz (b)Find the wavelength of the wave. ___m (c)Find the speed of the wave. ___m/s
*December 5, 2012 by Aaron*

**physics**

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m .. if needs values of these ( the speed of the wave is 58.77 m/s) (the ...
*October 25, 2011 by maria*

**Math**

Which represents the type of sequence: 12, 22, 30, 36, 41,
? neither arithmetic nor geometric both arithmetic and geometric arithmetic geometric
*March 10, 2012 by Brett *

**physics**

A wave travels at 575 m/sec in a dense media. The wave is observed to The length of the media is 95.8 cm. When the wave is reflected at the end, its phase is reversed (an upward motion becomes a downward motion.) What is the frequency of the resonant wave in this media?
*February 19, 2014 by Ann*

**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*

**physics**

A wave traveling in the + x direction has an amplitude of 0.35 m, a speed of 5.2 m/s, and a frequency of 14 Hz. Determine: 3.1.the wavelength, (2) 3.2.the wave number, (2) 3.3the angular velocity, (2) 3.4. the equation of the wave
*February 16, 2012 by joe*

**Physics**

A sinusoidal wave traveling on a string is moving in the positive x-direction. The wave has a wavelength of 8 m, a frequency of 60 Hz, and an amplitude of 9 cm. What is the wave function for this wave? (Use any variable or symbol stated above as necessary.) I think the ...
*July 17, 2012 by Bruce*

**Physical Science**

1.Nico uses wire to connect a battery, light bulb, and a switch, but the light bulb doesn't light up. What might explain this problem? A.The circuit is closed B.The wires are bent C.The battery has too much power D.The switch is open. B? 2.What type of wave doesn't require a ...
*May 22, 2009 by mysterychicken*

**physic**

You are given two waves, a transverse wave that moves to the right f1(x) and a transverse wave that moves to the left f2(x), on a string. As the problem begins, the wave f1(x) is moving to the right at v1 = +1 m/s and the wave f2(x) is moving to the left at v2 = -1m/s. what is...
*March 22, 2011 by rama*

**Meteorology/ Natural Hazards**

Determine the epicenter of an earthquake from the seismographic data below: Time of wave arrival p wave s wave San Francisco 13:03:21 13:06:04 Dallas 12:04:34 12:05:59 New York City 12:24:54 12:29:50 P wave Speed 5.5 km/sec S wave Speed 3.5 km/sec where Z is time Zulu (GMT). -...
*August 28, 2013 by Nicole*

**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 rock dropped into a pond produces a wave that takes 14.6 s to reach the opposite shore,21.1 m away. The distance between consecutive crests of the wave is 5.3 m. What is the frequency of the wave?
*December 4, 2012 by Priscilla*

**physics**

A rock dropped into a pond produces a wave that takes 15.7 s to reach the opposite shore, 24.3 m away. The distance between consecutive crests of the wave is 3.5 m. What is the frequency of the wave?
*September 23, 2014 by Anonymous*

**physics**

a fisherman noticed that his boat was lifted by the wter waves about once evry two seconds. He looked at the waves wnd estimated the length of a wave to be a 6cm. He also estimated the vertical distance between the highest point snd the lowest point of the wave to be 0.5m find...
*December 9, 2014 by patris*

**Physics-please**

When a sound wave passes from air into a solid object, which of the following wave properties change? -Frequency -Wave Speed -Amplitude -Wavelength all that apply
*November 10, 2011 by Logan*

**general science**

2 waves are traveling through a container of nitrogen gas. Amplitude of the first wave is 0.3 cm, and the second 0.9 cm. What is true about the two waves? a. the energy of thee first wave is less than the second b. energy of the first wave is greater c. speed of the first wave...
*February 26, 2010 by Mike*

**8th grade math!!!!! :)**

Determine whether each sequence is arithmetic or geometric. Find the next three terms. 1. 14, 19, 24, 29, . . . (1 point) geometric, 34, 39, 44 arithmetic, 32, 36, 41 arithmetic, 34, 39, 44 The sequence is neither geometric nor arithmetic. 2. 4, 8, 16, 32, . . . (1 point) ...
*April 11, 2013 by jessie*

**Physics**

A rock dropped into a pond produces a wave that takes 15 s to reach the opposite shore, 35.8 m away. The distance between consecu- tive crests of the wave is 3.3 m. What is the frequency of the wave? Answer in units of Hz
*April 18, 2013 by Ted*

**Design **

Which design style encourages a complete manipulation of floral materials into unnatural geometric shapes and colors? A. Abstract B. New convention C. Ikebana D. New wave im thinking B
*January 16, 2013 by Jamie *

**economics**

Sally and a partner holds the ends of a spring 4 meters apart. There are 5 nodes in the standing wave produced. Sally moves her hand from the rest position back and forth along the floor 20 times in 4 seconds. Determine the following: Wavelenght of wave sally sue sent ...
*April 22, 2010 by CJ*

**physics**

Sally and a partner holds the ends of a spring 4 meters apart. There are 5 nodes in the standing wave produced. Sally moves her hand from the rest position back and forth along the floor 20 times in 4 seconds. Determine the following: Wavelenght of wave sally sue sent ...
*April 22, 2010 by CJ*

**physics**

A wave with an amplitude of 1.94 m interferes with a second wave with an amplitude of 0.85 m. What is the largest resulting wave that could occur if these two waves destructively interfere?
*April 9, 2013 by Anonymous*

**Physics**

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m?
*November 22, 2010 by Bala*

**Physics**

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m?
*November 22, 2010 by Bala*

**Physics**

The period of longitudinal sinusoidal wave is 0.16 seconds and its wavelength is 8.0 meters. Calculate the wave's speed, frequency, angular frequency and wave number.
*January 18, 2013 by Sean*

**physics **

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 10.4m/s. What is the amplitude if the maximum displacement is 26.6cm and the total distance travelled by the wave is 18.4m?
*November 20, 2012 by kim*

**Math**

The speed of an ocean wave is measured by an oceanographer.the wave travels 30 meters in 10 seconds. How many meters will the wave travel in 2 minutes
*January 31, 2014 by Anonymous*

**Wave**

What feature is NOT defined for a wave pulse? a)period b)wave speed c)the position of a particle at a certain time d)a defined source
*February 8, 2014 by John*

** UNIVERSITY**

a sound wave has a beta that is 10 dB, calculate the intensity of the sound wave in units of international standards and the amplitude of the pressure wave
*May 4, 2014 by rosa*

**Algebra**

Determine whether each sequence is arithmetic or geometric. Find the next three items. 1. 14,19,24,29, . . . a. geometric; 34, 39, 44 b. arithmetic; 32, 36, 41 c. arithmetic; 34, 39, 44 d. The sequence is neither geometric nor arithmetic.
*May 18, 2014 by Shelin*

**Physical Science**

An ultrasonic wave in water is a compression wave that travels at 1,400 m/s A) An ultrasonic wave from a ship travels to the bottom of a lake and back in 0.16s. How deep is it at this point? B) If an ultrasonic wave is emitted in the ocean where the ocean's depth is 3.5km, how...
*March 2, 2014 by Charles*

**physics**

A wave travels a distance of 20m in 3s. The distance btw successive crests of the wave is 4cm. What is the frequency of the wave?
*January 29, 2014 by bisi*

**chemistry**

A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.
*July 5, 2011 by tina*

**PHY**

A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.
*July 5, 2011 by Tim*

**PHYSICAL SCIECE**

A seismic wave has a velocity of 5000 m/s and a frequency of 4Hz. wht is the wavelength of this wave? if this was a light wave traveling in a vacuum with the same wavelength, what would be its period?
*July 14, 2011 by CARLOS*

**Geometric Series (Algebra 2)**

I need some assistance or a formula when trying to find the first term of geometric series please! I don't understand this!!!! What is the first term of a geometric series with a summation of 289, 5 terms and a common ratio of 1/2?
*April 14, 2012 by Greg*

**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*

**Physics**

A sinusoidal wave traveling on a string is moving in the positive x-direction. The wave has a wavelength of 6 m, a frequency of 48 Hz, and an amplitude of 9 cm. What is the wave function for this wave? (Use any variable or symbol stated above as necessary.) I know the answer ...
*July 13, 2012 by James*

**Math (Geometric Progression)**

5 distinct positive reals form an arithmetic progression. The 1st, 2nd and 5th term form a geometric progression. If the product of these 5 numbers is 124 4/9, what is the product of the 3 terms of the geometric progression? Note: The phrase "form an arithmetic progression" ...
*June 22, 2013 by Shin*

**College Physics 2056**

An electromagnetic wave strikes a 3.00-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.00 10-4 T. How long does it take for the wave to deliver 1000 J of energy to the wall?
*April 8, 2012 by Tony*

**Math**

Is the following sequence a arithmetic,geometric or neither? 1.6, .8, .4, .2 my answer is geometric
*May 11, 2014 by steve*

**physics**

2 waves are traveling through a container of nitrogen gas. Amplitude of the first wave is 0.3 cm, and the second 0.9 cm. What is true about the two waves? a. the energy of thee first wave is less than the second b. energy of the first wave is greater c. speed of the first wave...
*February 23, 2010 by Toni*

**geometric series**

what is the nth term equation for a geometric sequence with a1 = 36 and r = 1/3
*September 13, 2010 by raven*

**Physics**

A tuning fork creates sound wave with frequency of 170 hertz. If the speed of sound is 340 m/s, what is the wave length of the sound wave?
*January 19, 2014 by Christopher*

**Physics**

A tuning fork creates sound wave with frequency of 170 hertz. If the speed of sound is 340 m/s, what is the wave length of the sound wave?
*January 19, 2014 by Christopher*

**physics**

A water-skier is moving at a speed of 16.7 m/s. When she skis in the same direction as a traveling wave, she springs upward every 6.9 s because of the wave crests. When she skis in the direction opposite to the direction in which the wave moves, she springs upward every 4.2 s ...
*September 14, 2012 by Morgn*

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