Thursday

April 24, 2014

April 24, 2014

Number of results: 2,641

**Physics**

Waves of all wavelengths travel at the same speed v on a given string. Traveling wave velocity and wavelength are related by v=lambda*f,where v is the wave speed, lambda is the wavelength (in meters), and f is the frequency [in hertz]. Since only certain wavelengths fit ...
*Wednesday, April 13, 2011 at 7:26pm by ECU*

**Physics**

"A person is playing a small flute 10.75 cm long, open at one end and closed at the other, near a taut string having a fundamental frequency of 600.0 Hz. If the speed of sound is 344.0 m / s, for which harmonics of the flute will the string resonate? In each case, which ...
*Monday, June 4, 2012 at 10:17pm by Kyle*

**college physics**

Two forces, of magnitudes F_1 = 80.0 N and F_2 = 25.0 N, act in opposite directions on a block, which sits atop a frictionless surface. Initially, the center of the block is at position x_i = -4.00 cm. At some later time, the block has moved to the right, and its center is at ...
*Thursday, February 25, 2010 at 8:54am by coco*

**physics**

A piano tuner stretches a steel piano wire with a tension of 765 N. The steel wire has a length of 0.400 m and a mass of 3.00 g. What is the frequency f_1 of the string's fundamental mode of vibration? What is the number of the highest harmonic that could be heard by a person ...
*Monday, April 19, 2010 at 6:52pm by Anonymous*

**Physics**

Resonance in a system, such as a string fixed at both ends, occurs when a) it is oscillating in simpler harmonic motion b) its frequency is the same as the frequency of an external source c) its frequency is greater than the frequency of an external source d) its frequency is ...
*Sunday, December 6, 2009 at 6:14pm by Satej*

**Math**

prove f_{2n+1} = f_{n+1}^2 + f_n^2 Where f is the fibonacci sequence (so f_1=1, f_2=1, f_3=2, f_4=3, f_5=5, etc)
*Tuesday, June 7, 2011 at 10:20am by Sean*

**More Frequency - Physics**

A guitar player plucks two strings simultaneously. One string is tuned to a (fundamental) frequency of 381 Hz. It is found that beats are audible, with a beat frequency of 5.54 Hz. What are possible values for the frequency of the other string? (Answer the larger frequency ...
*Monday, November 29, 2010 at 11:14pm by Rachel*

**Statistics**

How will I know the modal class from a grouped data w/ equal class sizes if the highest frequency is 7 but then it appears thrice in 3 intervals. 34.00 - 39.69 frequency: 7 39.70- 45.39 frequency: 7 62.50-68.19 frequency: 7
*Tuesday, January 29, 2013 at 4:12am by Aa*

**Physics- Circuits **

In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is such that the ratio of the inductive reactance to the capacitive reactance of the circuit is observed to be 5.53. The resonant frequency is 220 Hz. ...
*Sunday, February 24, 2013 at 3:55pm by Please HELP *

**Physics **

In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is such that the ratio of the inductive reactance to the capacitive reactance of the circuit is observed to be 4.91. The resonant frequency is 240 Hz. ...
*Friday, February 22, 2013 at 8:11pm by Please HELP *

**PHYSICS**

In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is such that the ratio of the inductive reactance to the capacitive reactance of the circuit is observed to be 5.53. The resonant frequency is 220 Hz. ...
*Sunday, February 24, 2013 at 7:05pm by anonymous*

**math**

1. To form a __________ we form a ratio between each frequency and the total number of scores in the set. (Points: 5) stem-and-leaf display frequency distribution relative frequency distribution frequency polygon
*Monday, November 7, 2011 at 12:27pm by Anonymous*

**Physics**

A tuning fork has been damaged and its frequency slightly changed. What could its altered frequency be if it produces two beats per second with a tuning fork that is known to vibrate at 422 Hz? Lowest frequency? Highest frequency?
*Saturday, April 21, 2012 at 6:06pm by Helen*

**Acoustic and Auditory Physics**

A resonant frequency is a frequency that resonates within a tube of some length. The first resonant frequency of the average ear canal is around 3,000 Hz. Look at the Fletcher-Munson diagram. Which of the following statements is correct? The intensity level of the first ...
*Sunday, March 18, 2012 at 7:35pm by Jenna*

**frequency-physics**

Two sirens A and B are sounding so that the frequency from A is twice the frequency from B. Compared with the speed of sound from A, which of the following statements is true?
*Sunday, December 2, 2012 at 1:49am by lilly*

**st**

7) (8 pts) Construct a histogram and a frequency polygon for the following frequency distribution Miles Number of Commuters Class Frequency 0 - 24 4 25 - 49 10 50 - 74 11 75 - 99 5 100 –124 1
*Friday, December 14, 2007 at 11:07pm by Rose*

**Chemistry**

What is the wavelength of a broadcast frequency of 992 kHz? -a nuclear magnetic resonance spectrometer frequency of 400 MHz -radiation that has a frequency of 5.2x10^14(s^-1)
*Monday, October 10, 2011 at 7:07pm by Danielle*

**Physics**

The Russell Traction System To immobilize a fractured femur (the thigh bone), doctors often utilize the Russell traction system illustrated in the figure. Notice that one force is applied directly to the knee, F_1,while two other forces, F_2 and F_3 are applied to the foot. ...
*Friday, October 2, 2009 at 2:31am by Jenny*

**physics**

.Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward an observer at 14 m/s, a beat frequency of 5.1 Hz is heard. What is the frequency the horns emit? Assume T = 20°C.
*Monday, April 9, 2012 at 10:37pm by Anonymous*

**physics**

You have a tuning fork of unknown frequency. When your ring it alongside tuning fork with frequency of 360Hz, you hear beats at frequency of 2 Hz. When you ring it alongside tuning fork with known frequency of 355Hz, you hear beats at a frequency of 3Hz. What is the unknown ...
*Monday, May 2, 2011 at 4:25pm by silly*

**Math...LOST!!**

Heights The frequency distribution indicates the heights of 45 male high school seniors. Height(in.) Number of Males 64 2 65 6 66 7 67 9 68 10 69 6 70 3 71 0 72 2 a) Construct a histogram of the frequency distribution. b) Construct a frequency polygon of the frequency ...
*Sunday, July 31, 2011 at 11:11pm by Jen*

**waves and sound**

1-A tunning fork has a frequency of 440Hz. The string of a violin and this tuning fork, when sounded together, produce a beat frequency of iHz. From these two pieces of information alone, is it possible to determine the exact frequency of the violin string?... I feel like this...
*Sunday, May 17, 2009 at 7:49pm by Cynthia*

**Physics**

In a resonance-tube containing air, the source of sound is a small loudspeaker driven by a variable-frequency oscillator. The distance between successive antinodes is 10 cm for a frequency of 1625 Hz. When the frequency is slowly reduced, the standing wave pattern at first ...
*Saturday, March 16, 2013 at 2:28pm by Priscy*

**physics**

Four forces act on a hot-air balloon, F_1 is upward at 4600 N, F_2 is left at 1450 N, F_3 is right at 850 N, and F_4 is downward at 3600 N. ____ N at _____ degrees clockwise from F_2.
*Tuesday, February 22, 2011 at 8:24pm by Becky*

**Physics**

When two tuning forks are stuck simultaneously, 3 beats per second are heard. The frequency of one fork is 510 Hz. A piece of wax is placed on the 510 Hz fork to lower its frequency slightly. If the beat frequency is increased, what is the correct frequency for the second fork...
*Wednesday, May 15, 2013 at 4:38pm by dallas*

**statistics**

7) (8 pts) Construct a histogram and a frequency polygon for the following frequency distribution Miles Miles Number of Commuters Class Frequency 0 - 24 4 25 - 49 10 50 - 74 11 75 - 99 5 100 –124 1
*Saturday, December 15, 2007 at 6:30am by Rose*

**Math: Statistics**

Organize the data into a class interval frequency distribution using 10 intervals with frequency (f) and relative frequency (rf). Data Set: 100, 97, 99, 70, 72, 75, 82, 68, 85, 88, 71, 77, 93, 94, 54, 59, 83, 87, 98, 84, 72, 96, 98, 89, 74, 98, 77, 82, 83, 98, 90, 95, 85, 76, ...
*Tuesday, October 18, 2011 at 12:56am by Joy Chapman*

**statistics**

Suppose you are commparing frequency date for two groups,25 managers and 150 blue collar workers.Why would a relative frequency distribution be better than a frequency distribution?
*Saturday, September 24, 2011 at 6:29pm by Anonymous*

**science (physics)**

1) Why is frequency an element needed in the sound industry? and 2) When there is a sound pressure level of two different sources with different frequencies, why do sound pressure levels have to be determined in each seperate frequency? 1) The sound industry sells equipment ...
*Thursday, September 21, 2006 at 12:23am by Kat*

**MATH**

The frequency distribution indicates the heights of 45 male high school seniors. Height(in.) Number of Males 64 2 65 6 66 7 67 9 68 10 69 6 70 3 71 0 72 2 a) Construct a histogram of the frequency distribution. b) Construct a frequency polygon of the frequency distribution. I'...
*Monday, August 1, 2011 at 3:53pm by Jen*

**math**

Carolyn tested a coin to see if it was evenly weighted. She flipped the coin 100 times and came up with 42 heads and 58 tails. How does the relative frequency of tails to heads compare to the probability of tails in this experiment? A. The relative frequency is the same as the...
*Saturday, June 8, 2013 at 7:59pm by bubbie*

**PHYSICS**

A 50cm long hollow glass cylinder is open at both ends and is suspended in air. A source o sound that produces a pure frequency is placed close to one end of the tube. The frequency of the sound is slowly increased from a very low value. The tube is first observed to resonate ...
*Tuesday, August 9, 2011 at 9:57pm by Melissa*

**Physics (Simple Frequency Question) Reply SOON!**

I know that... wavelength = velocity * frequency frequency = velocity/wavelength If I have the voltage and the wavelength, does the voltage count as the velocity to find the frequency? If not, how do I find the frequency when I know the intensity, wavelength, and voltage? Thanks!
*Friday, May 8, 2009 at 7:56pm by Judy*

**Physics _ College**

A 50 cm long hollow glass cylinder is open at both ends and is suspended in air. A source of sounds that produces a pure frequency is placed close to one end of the tube. The frequency is placed close to one end of the tube. The frequency of the sound source is slowly ...
*Wednesday, August 10, 2011 at 1:37pm by Sonya*

**phy**

At a factory, a noon whistle is sounding with a frequency of 484 Hz. As a car traveling at 77 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in frequency ff − fi...
*Friday, April 12, 2013 at 9:59pm by kira*

**Sloshing water frequency**

Natural frequency of the sloshing water in a swimming pool of a cruiser ship is studied by an experimental set up with a scale of 1/10. If the natural frequency is found 3.5 Hz, then what is the natural frequency for full scale?
*Thursday, February 20, 2014 at 7:04am by Cagri*

**Physics**

The wavelength of red light is about 7x10^-7m. The frequency of the red light reflected from a metal surface and the frequency of the vibrating electron that products it are the same. What is this frequency?
*Friday, February 12, 2010 at 2:20am by sh*

**English grammar**

e.g. Do you often watch television? Often is an adverb of frequency. You should put the frequency verb before an ordinary verb, after the verb be and the auxiliary. ------------------------------------- Is my explanation about the use of 'often' grammatical? Would you let me ...
*Thursday, November 29, 2007 at 3:54am by John*

**Physics**

The wavelength in air of a sound is 5 m. (a) What is the frequency of the sound? Sound can have any frequency. It is the SPEED of sound that remains constant, independent of frequency, at a given temperature.
*Thursday, March 1, 2007 at 5:33pm by Courtney*

**Math**

The following data set gives the difference between the winning and? losing scores in 50 randomly observed high school basketball games: 2, 12, 1, 2, 12, 5, 14, 2, 45, 9, 1, 8, 18, 28, 9, 4, 30, 16, 4, 12, 8, 13, 20, 9, 17, 13, 49, 17, 13, 4, 14, 2, 12, 29, 8, 9, 11, 4, 6, 22...
*Sunday, November 1, 2009 at 4:29pm by Anonymous*

**Physics **

The capacitance in a series RCL circuit is C1 = 1.2 μF, and the corresponding resonant frequency is f01 = 7.2 kHz. The generator frequency is 1.2 kHz. What is the value of the capacitance C2 that should be added to the circuit so that the circuit will have a resonant ...
*Tuesday, February 19, 2013 at 8:34pm by Please HELP *

**PHYSICS**

an open tube is .86m long. Find the fundamental frequency and frequency of the next harmonic if the Temp=10deg celcius also if you closed one end of the tube what would the new fundamental frequency be?
*Monday, March 24, 2008 at 10:36am by shan*

**Physics**

Ok so I think I have this correct, but I'm not sure. The question is: what is the frequency of green light, which has a wavelength of 4.90 x 10 ^-7 m? Since all electromagnetic waves travel at 3.00 x 10^8 m/s (c), and c= wavelength x frequency, The problem is: (3.00 x 10^8...
*Tuesday, September 9, 2008 at 5:44pm by Olivia*

**Word Problem**

The following data set gives the difference between the winning and? losing scores in 50 randomly observed high school basketball games: 2, 12, 1, 2, 12, 5, 14, 2, 45, 9, 1, 8, 18, 28, 9, 4, 30, 16, 4, 12, 8, 13, 20, 9, 17, 13, 49, 17, 13, 4, 14, 2, 12, 29, 8, 9, 11, 4, 6, 22...
*Tuesday, October 27, 2009 at 9:13am by Anonymous*

**Chemistry**

What is the energy in Joules of a mole of photons of microwave light having a frequency typical of microwave? (frequency = 3.0 x 10^9 Hz) I tried using the equation E= h x frequency, but I ended up with the answer 1.98 x 10^-24 instead of the correct answer 1.2 J, so there ...
*Wednesday, November 14, 2012 at 6:29pm by Sarah*

**physics**

You have a tuning fork of unknown frequency. When you ring it alongside a tuning fork with known frequency of 360 Hz, you hear beats at a frequency of 10 Hz. When you ring it alongside a tuning fork with known frequency of 347 Hz, you hear beats at a frequency of 3 Hz. What is...
*Saturday, April 21, 2012 at 6:07pm by Helen*

**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 ...
*Tuesday, November 27, 2012 at 10:56am 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 ...
*Tuesday, November 27, 2012 at 4:00pm 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 ...
*Tuesday, November 27, 2012 at 5:49pm by Raju*

**Hydrodynamics**

Natural frequency of the sloshing water in a swimming pool of a cruiser ship is studied by an experimental set up with a scale of 1/10. If the natural frequency is found 3.5 Hz, then what is the natural frequency for full scale?
*Thursday, February 20, 2014 at 7:03am by Cagri*

**physical**

You are traveling in a car toward a hill at a speed of 42.1 mph. The car's horn emits sound waves of frequency 251 Hz, which move with a speed of 343 m/s. a) Determine the frequency with which the waves strike the hill. b) What is the frequency of the reflected sound waves you...
*Monday, July 16, 2012 at 4:58pm by itufizik*

**Physics - Frequency**

While blowing its horn of frequency 580 Hz, a car accelerates at 0.4 m/s2. The car starts from rest by your side and moves away. How long will it take for the frequency you hear to decrease by 5%? Hint: Do not forget to include the time it will take for sound to reach you.
*Monday, January 25, 2010 at 8:43pm by Intensity*

**Statistics**

The relative frequency for a class is computed as: A. class width divided by class interval. B. class midpoint divided by the class frequency. C. class frequency divided by the interval. D. class frequency divided by the total frequency>
*Sunday, December 13, 2009 at 11:42am by Tykrane*

**physics**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...
*Saturday, March 31, 2012 at 9:14pm by sara*

**Algebra 2**

The frequency of a radio wave is inversely proportional to the wavelength. If a wave 250 m long has a frequency of about 1200 kHz, what is the approximate length of a wave with a frequency of 800 kHz? A. 167 m B. 258 m C. 325 m D. 375 m
*Monday, March 28, 2011 at 6:15pm by Lauren*

**physics**

a pipe of length 1.00 m and open at both ends is lying on the ground at a construction site on a windy day of temperature 20 degrees C. Justin notices that the pipe is resonating and creating a sound of a particular frequency, the fundamental frequency. a) what is this ...
*Sunday, February 20, 2011 at 8:29pm by cindy*

**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 ...
*Tuesday, November 27, 2012 at 1:55pm 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 ...
*Wednesday, November 28, 2012 at 7:37pm by RajuPhys*

**physics**

The following forces act on a hockey puck (round, rubber disk) sitting on a frictionless surface: F_1 = 12 N at 15 degrees; F_2 = 28 N at 125 degrees; and F_3 = 33.3 N at 235 degrees. All the forces are in the plane of the ice. Determine the net force on the puck.
*Monday, November 16, 2009 at 3:56pm by Jacob*

**science**

How do I use the fact that each element has a different set of energy levels to explain why the colour of the light emitted by an element in the gaseous state is characteristic of the element? Energy affects frequency and frequency determines wavelenght. The color of an ...
*Thursday, March 15, 2007 at 7:07pm by laura*

**Physics**

At a factory, a noon whistle is sounding with a frequency of 480 Hz. As a car traveling at 85 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in frequency ff − fi...
*Tuesday, April 17, 2012 at 5:04pm by Armany*

**dual nature of matter & radiation**

Light of frequency 1.5 times the threshold frequency is incident on photo-sensitive material.If the frequency is halved & intensity is doubled,the photo current becomes 1. Quadrupled 2. Doubled 3. Halved 4. Zero
*Monday, March 2, 2009 at 5:59am by hriday*

**science**

1. A violin string is oscillating at a frequency of 880 Hz (1 Hz = 1 full cycle / second) in its 2nd harmonic. What wold be the frequency of the fundamental vibrational mode? 2. Describe how you would go about finding the frequency of an unmarked tuning fork using the ...
*Thursday, July 31, 2008 at 3:50pm by suzy*

**science (physics)**

what is a cut off frequency and it's application? I need the application explaination more then the definition of cut off frequency!!! Wouldn't it be nice to have a chip that detected blue light, but not red? Could cutoff frequency be used? Of course is could, and is.
*Thursday, September 21, 2006 at 9:07pm by Kat*

**Physics**

If centripetal force on an object in uniform circular motion is increased what is the effect on frequency of rotation if radius is constant. What is the effect on frequency and radius if both are free to vary. If veloicty increases, period is decreased, so frequency is increased.
*Monday, June 18, 2007 at 7:44pm by Steve*

**science**

Two forces, of magnitudes F_1 = 85.0 N and F_2 = 45.0 N, act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. Initially, the center of the block is at position x_i = -4.00 cm. At some later time, the block has moved to the ...
*Tuesday, November 23, 2010 at 10:57pm by BRIJ*

**Science please answer?**

what is the wavelength and frequency if the wavelengthis4.5x10-7 Show wok please (-7) You have already stated the frequency. Are you talking about light? What are the units of wavelength? meters? cm? feet/ frequency = (wave speed)/(wavelength) You can do the numbers. Make sure...
*Tuesday, November 28, 2006 at 10:32pm by Brooke*

**Physics**

1. A train whistle has a frequency of 1000 Hz. If the train is speeding at a velocity of 60 km/h past a stationary railroad crossing attendant, what is the apparent frequency a) as the train approaches him, b) as it moves away from him? Assume speed of sound to be 350 m/s. 2. ...
*Thursday, November 26, 2009 at 2:53pm by James*

**Physics**

Man stands out on the street with a frequency meter. A police car drives by with the sirens on and the frequency of the sounds measures 800 Hz when it get close but 600 Hz when the car goes away. a) What is the speed of the police car? b) What is the actual frequency of the ...
*Tuesday, April 15, 2014 at 8:29am by Physics: Doppler Effect ?*

**Science**

Does increasing the frequency of a wave also increase its wavelength? If not, how are these quantities related? high frequency. low wavelength That answer may be confusing. A high frequency has a short wavelength; i.e., 14 MHz is about 40 meters. 28 MHz is abouat 10 meters. 50...
*Tuesday, January 30, 2007 at 12:37pm by Tammy*

**biology**

The frequency of the sickle cell disease in parts of Central Africa is as high as 10 percent compared to a frequency of .5 percent in the US. Use the percentages for the Central Africa population and the US population to calculate the frequency of the heterozygous and ...
*Wednesday, February 27, 2013 at 8:22pm by Sarah*

**physics--please help**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...
*Sunday, April 1, 2012 at 10:53am by sara*

**physics--please help**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...
*Sunday, April 1, 2012 at 5:28pm by sara*

**Math**

Construct a histogram and a frequency polygon for the following frequency distribution Miles
*Tuesday, March 27, 2007 at 5:46pm by michael*

**maths-statistics**

The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8
*Tuesday, April 2, 2013 at 3:18pm by anoynomous*

**maths- urgent **

The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8
*Wednesday, April 3, 2013 at 2:25am by anoynomous*

**maths- urgent **

The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8
*Wednesday, April 3, 2013 at 12:12pm by anoynomous*

**Math 118**

Calculate the 42nd percentile in a frequency table. the frequency 1,3, 4, 2, 2, 1, 1, 2, 1, 3.
*Friday, September 17, 2010 at 10:23pm by Mary*

**maths- **

The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8
*Wednesday, April 3, 2013 at 2:00pm by anoynomous*

**Physics**

If a metal with a threhold frequency of 1.1 x 10^15 Hz is illuminated by light with a wavelength of 170 nm, then the maximum kinetic energy of the emitted photoelectron will be? this is my solution: h= 6.63 x 10^ -34 J.s c = 3 x 10^8 m/s Wavelength= 1.7 x 10^-7 m Threshold ...
*Thursday, June 24, 2010 at 7:10pm by Marium*

**Physics**

An elastic cord vibrates with a frequency of 2.7 Hz when a mass of 0.56 kg is hung from it. What will its frequency be if only 0.43 kg hangs from it?
*Wednesday, January 27, 2010 at 7:29pm by Anonymous*

**Science 6th Grade**

When the frequency of a note is twice the frequency of another, the notes are a(n) ______________ apart.
*Sunday, March 14, 2010 at 9:23am by David*

**Statistics[Math]**

Construct a histogram for following frequency distribution : Class-intervals Frequency 0-4 5 5-9 8 10-14 12 15-19 9 20-24 4
*Monday, October 29, 2012 at 12:28am by Mayank*

**Frequency - Physics**

An organ pipe that is closed at one end has a fundamental frequency of 128 Hz. There is a leak in the church roof, and some water gets into the bottom of the pipe, as shown in the Figure. The organist then finds that this organ pipe has a frequency of 217 Hz. What is the depth...
*Monday, November 29, 2010 at 11:13pm by Rachel*

**physics**

A certain dog whistle operates at 23.5 kHz, while another (brand X) operates at an unknown frequency. If neither whistle can be heard by humans when played separately, but a shrill whine of frequency 9200 Hz occurs when they are played simultaneously, estimate the operating ...
*Monday, April 23, 2012 at 9:55am by Drew *

**Physics**

A certain dog whistle operates at 23.5 kHz, while another (brand X) operates at an unknown frequency. If neither whistle can be heard by humans when played separately, but a shrill whine of frequency 9200 Hz occurs when they are played simultaneously, estimate the operating ...
*Monday, April 23, 2012 at 1:14pm by Zach*

**science**

how do you figure out frequency? for example this problem. What is the frequency, when the wavelenth is 29 and the time is 1minute 42 seconds?
*Sunday, March 9, 2008 at 10:53pm by renee*

**Electronics**

If the frequency of the crystal oscillator is 20 MHz on a PIC16F877a, the frequency of the signal on OSC1/CLKIN would be?
*Wednesday, December 3, 2008 at 11:11am by Charles*

**electronics**

If the frequency of the crystal oscillator is 20 MHz on a PIC16F877a, the frequency of the signal on OSC1/CLKOUT would be?
*Wednesday, December 3, 2008 at 11:11am by Charles*

**Electronics**

If the frequency of an RC oscillator connected to CLKIN is 96 KHz on A PIC 16F877a, the frequency on CLKOUT would be?
*Wednesday, December 3, 2008 at 11:13am by Charles*

**physics**

What is the lower frequency limit for humans to heat? And What is the corresponding wavelength for this frequency if the air temperature is 29 C?
*Thursday, October 15, 2009 at 10:06pm by Alyson*

**algebra**

Find the frequency in terms of the reference frequency of a sound which haa a pitch of 360 cents.
*Saturday, November 12, 2011 at 9:07pm by math musician*

**physics**

A Foucault pendulum with a length of 7.5 m has a period of 5.4 s. What is its frequency? What is its frequency in Hz?
*Monday, April 23, 2012 at 10:13pm by michelle*

**math**

find the median for the given frequency score, x = 1,2,3,4,5,6,7,8,9,10 frequency, f = 1,1,3,3,5,7,5,5,7,1
*Wednesday, April 2, 2014 at 2:18pm by carol*

**physics**

When a guitar string is sounded along with a 440Hz tuning fork, a beat frequency of 5Hz is heard. When the same string is sounded along with a 43Hz tuning fork, the beat frequency is 9Hz. What is the frequency of the string??.. The first thing i thought of doing was putting ...
*Sunday, May 17, 2009 at 4:59pm by help:(*

**Physics**

Ultrasound reflected from an oncoming bloodstream that is moving at 30 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat frequency = Hz HELP: This problem involves two Doppler shifts...
*Thursday, December 9, 2010 at 3:34pm by Angel*

**Math**

Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25
*Thursday, November 10, 2011 at 7:38pm by Jennifer*

**Math**

Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25 37-39 22 40-42 9 43-45 20
*Thursday, November 10, 2011 at 7:39pm by Jennifer*

**physics**

A sound wave travels in air at a frequency of 500 Hz. If part of the wave travels from air into water, does its frequency change? Does its wavelength change? Note that the speed of sound in air is about 340 m/s, whereas the speed of osund in water is about 1500 m/s. Frequency ...
*Wednesday, March 7, 2007 at 4:34am by anonymous*

**Phisics**

An elastic cord vibrates with a frequency of 3.5Hz when a mass of 0.62kg is hung from it.What is its frequency if only 0.40kg hangs from it?
*Tuesday, November 26, 2013 at 11:23pm by Daniela*

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