A state trooper’s car sends out a radar signal at a frequency of 14 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s. Answer in units of m

107,281 questions
1. physics

A state trooper’s car sends out a radar signal at a frequency of 13.3 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s. Answer in units of m

asked by LILY on September 18, 2014
2. Physics

What is the frequency shift of a 79 GHz police radar signal when it reflects off a car moving at 110km/h ?

asked by Mike on May 9, 2010
3. Physics

What is the wavelength of a radar signal that has a frequency of 30 GHz? The speed of light is 3 × 10^8 m/s. Answer in units of m Giving me the formula is just fine

asked by angel on April 1, 2012
4. physics

A state trooper chases a speeder along a straight road; both vehicles move at 160 km/h. The siren on the trooper's vehicle produces sound at frequency of 500 Hz. What is the Doppler shift in the frequency heard by the speeder?

asked by onon on September 27, 2014
5. physics

A certain radar installation used to track airplanes transmits electromagnetic radiation of wavelength 7 cm. (a) What is the frequency of this radiation, measured in billions of hertz (GHz)? __________GHz (b) What is the time required for a pulse of radar

asked by emily on November 9, 2007
6. Physics

3.A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 3 cm. a) Show that the frequency of this radiation is 10 GHz. b) Show that the time required for a pulse of radar waves to reach an airplane 5 km away

asked by Anonymous on May 12, 2010
7. Physics

Suppose that a police car on the highway is moving to the right at 27 m/s, while a speeder is coming up from almost directly behind at a speed of 35 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

asked by Anonymous on April 25, 2013
8. Science

1. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 2. For the radar above, how many seconds will it take for a signal to reach an airplane 15 km away, and return to the

asked by Caroline on November 13, 2012
9. biology

9. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 10. For the radar in #9 above, how many seconds will it take for a signal to reach an airplane 15 km away, and return

asked by doranda on November 14, 2012
10. Physics help!

Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

asked by Sarah on March 26, 2012
11. physics

Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

asked by linds on March 27, 2012

Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

asked by linds on March 26, 2012
13. Physics

Suppose that a police car on the highway is moving to the right at 20 m/s, while a speeder is coming up from almost directly behind at a speed of 31 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

asked by Mary on October 15, 2007
14. national university of Lesotho

A car travelling at a constant speed of 30.0m/s passes a trooper on a motorbike hidden behind a biilboard.2s later a speeding car passes the billboard,the trooper sets off in chase with a constand acceleration of 4.00m/s squared. How long does it take the

asked by Gwesta Ramphalile on August 17, 2015
15. Physics

A car traveling at a constant speed of 33 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.62 m/s^2. How long after the trooper starts the chase does he overtake the speeding car?

asked by Bethany on August 28, 2011
16. Physics

A car traveling at a constant speed of 39.6 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.25 m/s^2 . How long after the trooper starts the chase does he overtake the speeding

asked by Joe on September 9, 2012
17. Physics

A car traveling at a constant speed of 33 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.62 m/s^2. How long after the trooper starts the chase does he overtake the speeding car?

asked by Bethany on August 28, 2011
18. Physics

A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

asked by Sara on September 25, 2013
19. physics

A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

asked by Anonymous on April 13, 2016
20. Physics

A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

asked by Sara on September 25, 2013
21. Physics

A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

asked by Sara on September 25, 2013
22. Physics

A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

asked by Sara on September 25, 2013
23. Physics

A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

asked by Sara on September 25, 2013
24. Physics

A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

asked by Sara on September 25, 2013
25. Physics

A car traveling at a constant speed of 125 km/hr passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets in a chase after the car with a constant acceleration of 2.7 m/s^2. How far does the

asked by Lindsay on January 13, 2008
26. Physics

Suppose that a police car on the highway is moving to the right at 20 m/s, while a speeder is coming up from almost directly behind at a speed of 31 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

asked by Mary on October 16, 2007
27. physics

A speeding car is pulling away from a police car. The police car is moving at 30 m/s. The radar gun in the police car emits an electromagnetic wave with a frequency of 20.0 x 10^9 Hz. The wave reflects from the speeding car and returns to the police car

asked by Liz on August 21, 2010
28. Physics

A radar sends out a sound wave of 1.50 Mhz and senses it again from a moving car at a 1.40 Mhz. What is the speed of the car ?

asked by Physics: Doppler Effect ? on April 14, 2014
29. Physics

A modern computer central processing unit chip (CPU) runs with a clock speed of 2.7 GHz. It can execute one operation in each of these clock cycles. (a) how many seconds long is one clock cycle? (b) Electrical signals travel at the speed of light How far

asked by Phil on April 6, 2017
30. Physics wave motion

A radar array consists of five vertical antennae arranged in a line, each emitting radio waves of frequency 120MHz in phase with one another uniformly in all directions. The spacing between each of the antennae is 8.0m. Apart from the normal direction

asked by John on December 16, 2016

Calculate the wavelength of the signal sent by Q101 assuming that the actual frequency is 101.1 MHz. Determine how long it would take the signal to reach a car 33.4km away from the station. THANK YOU!

asked by Mike Jones on May 22, 2013
32. physics

Two cars both start from rest and have the same constant acceleration. When radar is used to measure the velocity of each car, car A is found to be moving twice as fast as car B. At the instant the radar is used, car A has a displacement that is ______

asked by Joey on September 13, 2010
33. trig

a state trooper is hidden 30ft. from a highway. One second after a truck passes, the angle beta between the highway and the line of ovservation from the patrol car to the the truck is measured. if the speed limit is 55mph and a speeding ticket is issued

asked by kay on July 8, 2008
34. physics

A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm. a)Find the frequency of this radiation. b)Find the time required for a pulse of radar waves to reach an airplane 4.8 km away and return.

asked by Kristie on April 29, 2012
35. Geophysics

A continuous signal is sampled at regular intervals, every 10 ms. What is the maximum frequency that can be captured by this sampling process without incurring any distortion of the original signal? If the original signal contains noise at a frequency of

asked by Mia on February 8, 2014
36. Physics

The brakes on your automobile are capable of slowing down your car at a rate of 4.2 m/s^2. a) If you are going 145 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 90 km/h speed limit? b) Graph x vs. t

asked by CM on June 13, 2011
37. physics

The brakes on your automobile are capable of creating acceleration of 14 ft/s2. If you are going 66 mi/hr and suddenly see a state trooper, what is the minimum time required to get your car to 55 mi/hr?

asked by Anonymous on September 1, 2014
38. Physics 12

First question I'm having trouble with: -An arrow is shot at a target 60m away (horiz), and 24m high (vert) - [picture of uneven trojectary is given] Find the arrow's initial speed. Second one goes something like this: - Car is traveling 170km/h down a

asked by Joe Seppe on March 25, 2008
39. Physics !

The sonar of a stationary ship sends a signal with a frequency of 5.0x103-Hz through water. If the signals speed is 1.5x103-m/s and the echoes detection is 3.9-sec later. What is the depth of the water under the ship?

asked by Tiara on February 28, 2013
40. PHYSICS

The microwaves in a microwave oven are produced in a special tube called a magnetron. The electrons orbit in a magnetic field of 9.3×10−2 T at a frequency of 2.6 GHz, and as they do so they emit 2.6 GHz electromagnetic waves. If the maximum diameter of

asked by CAMCAM on April 2, 2010
41. College Algebra

Problem: In certain signal detection problems (e.g. radar or sonar) the probability of false alarm (FA) (i.e., of saying that a certain signal is present in the data when it actually is not) is given by: ∞ pFA = ∫ _______1_______ x^p/2-1 e-x/2 dx η

asked by Anonymous on November 20, 2010
42. Science

A space probe on the surface of Mars sends a radio signal back to earth a distance of 8.66x0^7 km. Radio waves travel at the speed of light (3:00x10^8 m/s . How many seconds does it take the signal to reach earth

asked by Sherri on January 21, 2016
43. Physics (When will Kathy overtake Stan if )

Kathy has a sports car that can accelerate at the rate of 4.90m/s^2. She races with Stan. Both cars start from rest but experienced Stan leaves starting line 1.00s before her. Stan moves with a constant aceleration of 3.90m/s^2 and Kathy maintains an

asked by ~christina~ on September 25, 2007
44. fizik

1. A sports car travelling east at 48.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 22 m/s in 4.10 s a) Find the magnitude and direction of the car’s acceleration as it slows down b) Calculate the distance

asked by alya on February 20, 2011
45. Physics

Microwaves are electromagnetic waves transmitted at a normal frequency of 2.45 GHz. Find the wavelength of the microwaves.

asked by Zach on May 29, 2012
46. physics

Microwaves are electromagnetic waves transmitted at a normal frequency of 2.45 GHz. Find the wavelength of the microwaves.

asked by Phil on May 30, 2012
47. Physics

-The brakes on your automobile are capable of creating acceleration of 19 ft/s2. If you are going 76 mi/hr and suddenly see a state trooper, what is the minimum time required to get your car to 55 mi/hr? For this answer, I got 1.62 s. -How far do you

asked by Lindsay on October 4, 2007
48. fizik

1. A sports car travelling east at 48.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 22 m/s in 4.10 s a) Find the magnitude and direction of the car’s acceleration as it slows down b) Calculate the distance

asked by alya on February 20, 2011
49. Science- PLEASE, this is due tomorrow for test!

What is the section of EMS of satellite phones? What wavelength and frequency does it use? are there any dangers in using it? What is the wavelength and frequency of pagers? are there any dangers in using it? Is there any danger in using cordless phones?

asked by Lily on October 23, 2008
50. engineering

Let’s suppose the message x(t) is an analog signal shown in the figure below. a) Draw the block diagrams of the system which converts the analog message signal x(t) to a pulse modulated signal. b) Draw the sampled signal with the sampling frequency

asked by dioptas on June 6, 2013
51. physics

A radar installation that is used to track airplanes transmits electromagnetic radiation with a wavelength of 4 cm. Calculate the frequency of this radiation in Hz. Calculate the time required for a pulse of radar waves to reach an airplane 4.0 km away and

asked by LL on July 1, 2012
52. physics

An FM radio station broadcasts its signal at a frequency of 9.15 ×107 hertz. Determine the wavelength of the signal in air. Round your answer to the nearest hundredth of a meter.

asked by ashley -- on April 18, 2011
53. Math

Can someone please go over the steps to solve this problem? I know I need to find where the tugboat intersects the radar but I'm not sure exactly how to do this. A radar buoy detects any boats within a radius of 12 miles. A tugboat starts at a location 18

asked by Lily on August 17, 2011
54. physics

What is the frequency of the microwaves in a microwave oven? The wavelength is 12 cm. I have to give the answer in GHz

asked by sean on March 23, 2010
55. physics

a car sounds its horn as it travels at a steady speed of 15m/s along a straight road between two observers x and y. the observer x heras a frequency of 538 hz while observer y hears a lower frequency. 1 is the car traveling towards x or y 2what would the

asked by mevan on December 13, 2014
56. Physics

A police car approaches a large wall at 51m/s. Its siren emits a 980 Hz signal. What is the frequency of the reflected sound observed by the officer?

asked by maryam on March 10, 2016
57. physics

A car traveling east at 42.4 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in 4.00 s. (a) What is the magnitude and direction of the car's acceleration as it slows down?

asked by roger on August 29, 2012
58. Caculas

(Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr,

asked by matthew on December 16, 2011

(Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr,

asked by math on December 15, 2011
60. science

A space probe of the surface of Mars sends a radio signal back to the Earth, a distance of 3 x 1010 km. Radio waves travel at the speed of light (3.00 x 108 m/s). How far away is the space probe? How many seconds does it take for the signal to reach the

asked by Anonymous on February 4, 2012
61. Mathematics

A motor car travels 175 km distance from a place A to B,at a uniform speed 70km/hr passes though all ten green traffic signals.Due to heavy traffic it stops for 1 minute at first signal,3 minute at second signal,5 minute at third signal and so on stops for

asked by Sakshi on May 22, 2016
62. Math

Suppose that a cyclist began a 510 mi ride across a state at the western edge of the state at the same that a car traveling toward it leaves the eastern end of the state if the bicycle and car met after 8.5 hr and the car traveled 33.4 mph faster than the

asked by Daniel on November 29, 2015
63. Algebra

Suppose that a cyclist began a 390 mi ride across a state at the western edge of the state, at the same time that a car traveling toward it leaves the eastern end of the state. If the bicycle and car meet after 6.5 hr and the car traveled 32.4 mph faster

asked by Sam on October 2, 2016
64. Math

Suppose that a cyclist began a 450 mi ride across a state at the western edge of the state, at the same time that a car traveling toward it leaves the eastern end of the state. If the bicycle and car met after 7.5 hr and the car traveled 30.4 mph faster

asked by Daniel on November 29, 2015
65. physics

1)As a sound source moves away from a stationary observer, the number of waves will. decrease 2)How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The speed of sound is 343 m/s.

asked by Jon on April 6, 2008
66. electronics

If the frequency of the crystal oscillator is 20 MHz on a PIC16F877a, the frequency of the signal on OSC1/CLKOUT would be?

asked by Charles on December 3, 2008
67. Electronics

If the frequency of the crystal oscillator is 20 MHz on a PIC16F877a, the frequency of the signal on OSC1/CLKIN would be?

asked by Charles on December 3, 2008
68. physics

A train is moving parallel to a highway with a constant speed of 16.0 m/s. A car is traveling in the same direction as the train with a speed of 36.0 m/s. The car horn sounds at a frequency of 504 Hz, and the train whistle sounds at a frequency of 314 Hz.

asked by Anonymous on March 25, 2012
69. physics

An  approaching  train  produces  the  RP1 signal (attention  signal)  at  600 Hz . The  train  moves  with  the speed  of  120 km/h. What  is  the  frequency and  the wavelength  of  the  sound

asked by enrique on May 5, 2014
70. Physics URGENT!!!!!!!!!!!!

An  approaching  train  produces  the  RP1 signal (attention  signal) at  600 Hz . The  train  moves  with  the speed  of  120 km. What  is  the  frequency  and  the wavelength  of  the  sound

asked by enrique on May 5, 2014
71. 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

asked by Physics: Doppler Effect ? on April 15, 2014
72. Physics

The Voyager 1 spacecraft is at the edge of the solar system, about 11 billion km away. (a) How long does a radio signal from Voyager 1 take to get to the Earth? (b) Its radio works at 8 GHz. What is the wavelength? (c) What type of light is this? (d)

asked by Kimia on May 10, 2017
73. physics

A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 118 km away. The radar antenna is pointing upward at an angle of 58.2 ° above the ground. Find (a) the x and (b) the y components (in

asked by Ashley on September 28, 2014
74. physics

A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 181 km away. The radar antenna is pointing upward at an angle of 66.2 ° above the ground. Find (a) the x and (b) the y components (in

asked by need help on December 14, 2014
75. physics

1)As a sound source moves away from a stationary observer, the number of waves will. decrease 2)How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The speed of sound is 343 m/s.

asked by Jon on April 6, 2008
76. Physics

A car traveling 35.0 m/s overtakes another car going only 22.0 m/s. When the faster car is still behind the slower one, it sounds a horn of frequency 1500.0Hz. What is the frequency heard by the driver of the slower car? What is the altitude of the plane?

asked by Trace on December 3, 2017
77. Physics

A car traveling 35.0 m/s overtakes another car going only 22.0 m/s. When the faster car is still behind the slower one, it sounds a horn of frequency 1500.0Hz. What is the frequency heard by the driver of the slower car?

asked by Trace on December 3, 2017
78. physics

When four people with a combined mass of 320 kg sit down in a car, they find that the car drops .80 cm lower on its springs. THen they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (empty) is 2.0 X

asked by sam on March 15, 2007
79. science

the waves above is an electrical signal resulting from a sound wave. how does the information in this electrical signal make it to your car radio, it is carried on an FM wave by modulating its frequency,is it carried on an FM wave by its amplitude, is it

asked by momma knows on November 30, 2015
80. PHYSICS-URGENT HELP

A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns to the police car with a frequency of 1250 Hz. The police car is right next to the highway, so the moving car is traveling either directly

asked by Brit on July 29, 2011
81. Physics

The note D above middle C has a frequency of 294 cycles per second, and the note E has a frequency of 330 cycles per second. A driver of a moving car sounds the horn, which emits an E tone, but a stationary observer hears a D tone. Calculate the speed at

asked by Tom on April 25, 2018
82. IT

Can someone please help me start this? Using Shannon’s formula, calculate the data transfer rate given the following information: signal frequency = 10,000 Hz signal power = 5000 watts noise power =230 watts.

asked by Mo on November 1, 2012
83. physics

The driver of a train traveling at 30 m/s applies the brakes when he passes an amber signal. The next signal is 1.5 km/h down the track and it reaches 75 seconds later. Assuming uniform acceleration, find the velocity of the train at the second signal.

asked by Anonymous on July 20, 2015
84. physics

A car travelling at a constant speed of 136 km/hr passes a tropper hidden behind a billboard. One second after the speeding car passes the billboard, the tropper sets in a chase after the car wit ha constant acceleration of 3.8 m/s^2. How far does the

asked by nikki on September 29, 2011
85. physical

You are driving along a highway at 27.7 m/s when you hear a siren. You look in the rear-view mirror and see a police car approaching you from behind with a constant speed. The frequency of the siren that you hear is 1830. Hz. Right after the police car

asked by itufizik on July 16, 2012
86. physics

a telephone engineer feeds a sound signal into the mouthpiece of a telephone.As part of the tests he is making he incresesthe frequency of the sound.HOW WILL THIS EFFECT TYE ELECTICAL SIGNAL PASSING ALONG THE TELEPHONE WIRE?

asked by sana on October 25, 2007
87. physics

An ambulance car is going with a speed of 60 km/h, while a car is trying to go around it in a circle with a speed 50 km/h. If the sound that ambulance car emits has a frequency of 1 kHz, which frequency does the driver of the car hear in Hz when the

asked by aron on September 22, 2013
88. Science

What is the wavelength and frequency of radar waves? and does it have any dangers? thanks :)

asked by Lily on October 22, 2008
89. Physics

For a I got 36666.67 seconds which I don't know if its right and then b I know my answer is wrong because I got 0.0375 for wavelength.And I don't understand how to do e or f.   The Voyager 1 spacecraft is at the edge of the solar system, about 11 billion

asked by Kimia on May 10, 2017
90. Physics

Four people sit in a car. The masses of the people are 41 kg, 47 kg, 53 kg, and 55 kg. The car's mass is 1020 kg. When the car drives over a bump, its springs cause an oscillation with a frequency of 1.00 Hz. What would the frequency be if only the 41-kg

asked by Priyanka on March 30, 2012
91. chemistry

What type of feature will be observed in the EI mass spectrum of chlorobenzene? An absorption at 3100 cm–1 No signal at all A signal at 112 and a signal at 114 in a ratio of 3:1 A signal at 112 and a signal at 114 in a ratio of 1:1

asked by Tiffany on December 11, 2011
92. Signals & Systems

The suspension system of a car is modelled by the following differential equation: M*((d^2*y)/(d*t^2) + D*(dy/dt) + Ky( t ) = x( t ) where y(t) is the vertical position of the car body, x(t) is the external force coming from the ground acting on the car

asked by Tawana on November 7, 2014
93. ECG Help - Bio

If your MP100 is set to sample at 100 sps, what is the maximum frequency that can be detected in the analog signal? If the peak of a waveform is followed 500 ms later by a trough, what is the frequency of the waveform in Hz?

asked by Alex on September 28, 2009
94. physics

Microwave ovens typically cook food using microwaves the a frequency of about 3.00 GHz (gigahertz 10 to the nine Hz). Show the wavelength of these microwaves traveling at the speed of light is 10cm.

asked by bubba1 on July 7, 2013
95. Physics

When four people with a combined mass of 320 kg sit down in a car, they find that the car drops 0.80 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (when it is

asked by Y0gi on December 7, 2010
96. Calculus

a police helicopter is flying at 200 km/hr at a constant altitude of 1 km above a straight road. The pilot uses radar to determine that an oncoming car is at a distance of exactly 2 km from the helicopter, and that this distance is decreasing at 250 km/hr.

asked by Alex on November 8, 2010
97. physics

a car, moving at 100 mi/hr, passes a stationary police car whose siren has a frequency of 500 Hz. what is the frequency change heard by observer in the moving car as he passes the police car? the velocity of sound in air is 343 m/s. ( 1 mi= 1.609 km).

asked by OMAR on May 30, 2011
98. physics

A submarine sends a sonar signal, which returns from another ship 3.22 s later. How far away is the other ship?

asked by Alyson on October 15, 2009
99. PHYSICS

WHEN SIX PEOPLE WHOSE AVERAGE MASS IS 84 KG SIT DOWN IN A CAR, THEY FIND THAT THE CAR DROPS .84 CM LOWER ON ITS SPRINGS. THEN THEY HAVE GET OUT OF THE CAR AND BOUNCE IT UP AND DOWN. THE ACCELERATION OF GRAVITY IS 9.8 M/S^2. WHAT IS THE FREQUENCY OF THE

asked by KOCHU on January 13, 2013
100. linear algebra

A signal lac has six flags of which 1is blue ,two z white,3 ar red.it sends messages hostin flags in a flagpole.d messages ar being conveyed by d order in which d colours ar arranged find hw many mesaages it can send.......a.using exactly six flags,b.using

asked by victor on August 31, 2016