1. Science

    Which of the following affects the speed of sound? A. The amplitude of the wave. B. The frequency of the wave. C. The phase of the medium. D. The wavelength. Is the answer A? Thank you

    asked by Callie on February 18, 2015
  2. Science

    Which of the following affects the speed of sound? A. The amplitude of the wave. B. The frequency of the wave. C. The phase of the medium. D. The wavelength. Is the answer D? Thank you

    asked by Callie on February 18, 2015
  3. Physics

    If a projectile has a launching angle of 52 degrees about the horizontal and an initial speed of 18 m/s, what is the highest barrier that the projectile can clear?

    asked by Addie on May 11, 2011
  4. physics

    A 9600 kg boxcar traveling at 15 m/s strikes a stationary second car. The two stick together and move off with a speed of 7.0 m/s. What is the mass of the second car?

    asked by Anonymous on March 7, 2010
  5. Science!!!

    A 2,500 kg car moves at 15 m/s^2; 15m/s^2 is the (blank) of the car. A. Acceleration B. Force C. Velocity D. Speed Is the answer D? Thank you

    asked by Callie on February 11, 2015
  6. physics

    A body strikes the ground vertically down wards with a velocity u and rebounds with the same speed.Calculate the change in velocity.

    asked by Anonymous on June 10, 2012
  7. science/math

    a cyclist accelerates at a rate of 7.0m/s^2. how long will it take the cyclist to reach a speed of 18m/s? my answer is 2.5seconds. is this correct?

    asked by taylor on September 18, 2014
  8. phy

    A golfer gives a ball a maximum initial speed of 37.0 m/s. 1-What is the highest tree the ball could clear on its way to the longest possible hole-in-one?

    asked by elin on July 9, 2011
  9. physics

    a 1.0 m long rope with a mass on one end swings in a horizontal circle such that the speed of the mass is 1.5m/s. what is the period of motion?

    asked by Josue on December 13, 2016
  10. Physics

    A rocket blasts off from rest and attains a speed of 42.3 m/s in 13.8 s. An astronaut has a mass of 70.2 kg. What is the astronaut's apparent weight during takeoff?

    asked by Jess on October 24, 2015
  11. Physics

    The equation y=5 sin(3x-4), where y is in mm, x is in m and t is in secs, represents a wave motion. Determine the frequency, period and speed of the wave

    asked by Sophia on February 26, 2018
  12. PHYYYYYSICS 8

    A baseball is thrown horizontally off a 40-m high cliff with a speed of 16.3 m/s. How much time in seconds will it take for the baseball to hit the ground?

    asked by Carissa on September 18, 2014
  13. physics

    choose the correct answer and why? a car starts from rest and reaches speed of 80 km/h in 16 s the average acceleration of the car is: a\ 0.7 m/s*2 b\1.4 m/s*2 c\5 m/s*2

    asked by Reem on February 20, 2014
  14. phy

    At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilomole of oxygen has a mass of 32kg.

    asked by christ on January 24, 2013
  15. Physics

    A child sits on the edge of a spinning merry-go-round that has a radius of 1.5 m. The childs speed is 2 m/s. What is the Child's acceleration?

    asked by Amanda on June 14, 2011
  16. algebra

    on a scatter plot how can you determine if driving speed and driving time show a positive, negative or no relationship?

    asked by sandy on January 15, 2013
  17. physics

    A ball rolling down an incline travels 6.0 m in the first 0.25 seconds, and 24 m in the first 0.50 seconds. Find: The average speed for the first time interval

    asked by Kristi on January 16, 2012
  18. physics

    If a ball has an initial speed of 26.9 m/s and is launched at an angle of 63.2 degrees above the horizontal, what is the tallest obstacle that the ball can clear?

    asked by Cassie on October 6, 2013
  19. math

    a gun is fired at a distance of 24.3km away from man. he hears the sound after 27 second. find the speed of sound at which it travels.

    asked by ak on January 16, 2018
  20. physics

    a mass of 9.6 kg is moving horizontally as a force of 2.3 N , directed at 21° below the horizontal , is exerted on it , when the speed is 7.9 m/s, what is the rate at which the force is doing work

    asked by riham on April 25, 2015
  21. physics

    A ball is tossed vertically upwards with a speed of 5.0 m s–1. After how many seconds will the ball return to its initial position? plz help !

    asked by physiclover on January 19, 2018
  22. Science

    A coach wants to find out the speed of the runners on the track team.Tell what simple equipment the coach need in order to do this and explain how it should be done.

    asked by Mel on January 21, 2018
  23. Physics

    at a drag race a jet car travels 1/4 miles in 5.2 seconds. what is the final speed of the car and its acceleration?

    asked by Zara on February 24, 2015
  24. Physics

    A 2.0 mm diameter glass sphere has a charge of +1.0 nC. What speed does an electron need to orbit the sphere 1.0 mm above the surface? (Ans. 2.81×107 m/s)

    asked by Anonymous on February 25, 2010
  25. Calculus (Motion with Vector functions)

    1. What are the magnitude and direction angle for the vector u= 2. Calculate the speed of a particle in the xy-plane with positive vector r(t)=(4-t^2, 6t) at the point (0,12).

    asked by Angela on January 22, 2018
  26. Please Help! Calculus

    Calculate the speed of a particle traveling in the xy-plane with position vector r(t)=(4-t^2,6t) at the point (0,12). a)2(sqrt13) b)6 c)4(sqrt13) d)52 e)sqrt2

    asked by Tony on January 22, 2018
  27. Math (unit rates)

    A school bus traveled at an average speed of 35 miles per hour for 45 minutes. What distance did the bus travel?

    asked by princessleaya on November 24, 2017
  28. Physics

    Microwaves travel at the speed of light, 3.00 × 108 m/s. When the frequency of microwaves is 5.93× 109 Hz, what is their wavelength? Answer in units of m.

    asked by Axel on April 28, 2015
  29. physics

    a particl rotating disc of radius 2m has a constant speed 16m/s.what is size of angular velocity of disc?

    asked by Anonymous on January 9, 2016
  30. physics

    a motorboat is driven across a river at 5km/h at right angles to a current flowing at 3.9km/h. What is the resulting speed of the motorboat?

    asked by Crystal on January 12, 2012
  31. physisc

    A stone is thrown vertically downwards from a building with an initial speed of 4m/s.It reached the ground after 5 s. (a) whats the height of the building h?

    asked by ABDUL AAZIZ on October 8, 2016
  32. Physics

    If a bobsled with a total mass of 250kg, reaches the bottom of the hill at a speed of 92mph, how tall was the hill?

    asked by Leah on March 1, 2010
  33. college physcial science

    a car whose inintal speed is 30m/s undergoes a constant acceleration of 5m/s2. In the first 6s after the accleration starts the car travels

    asked by Tammie Mitchell on July 14, 2011
  34. Physics

    A 85-Kg firefighter climbs up a ladder at a constant speed of 2.5 m/s. What average power does the firefighter expend to overcome gravity?

    asked by Bob on November 25, 2014
  35. physics

    a car skids to a halt at a rate of -9.4 m/s2. the skid marks measure 34 m. what speed was the car going when it slammed on the brakes?

    asked by karla on September 17, 2012
  36. Math

    r=40-2t shows the relationship between the average rate of speed, r, of a car in meters per second, and the time, t,in seconds, as the car slows down.

    asked by annie on February 26, 2012
  37. physics

    A sound wave has a frequency of 1640 Hz. The air temperature is 46 degress F. What is the speed? v = What is the wavelenght of the sound? lambda =

    asked by sean on April 21, 2014
  38. physics

    A ball is thrown horizontally from the roof of a building 59.0 tall and lands 27.4 from the base. What was the ball's initial speed?

    asked by alexis on September 21, 2011
  39. Physics

    Write an expression for a transverse harmonic wave that has a wavelength of 2.8 m and propagates to the right with a speed of 14.2 m/s. The amplitude of the wave is 0.13 m, and its displacement at t=0 and x=0 is 0.13 m.

    asked by Cooper on November 22, 2011
  40. PHYSICS

    A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s

    asked by Anon on January 23, 2011
  41. physical

    A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s

    asked by Anon on January 23, 2011
  42. Physics

    A ball is thrown directly downward, with an initial speed of 6.10 m/s, from a height of 31.0 m. After what interval does the ball strike the ground?

    asked by Megan on January 23, 2011
  43. Physics

    A falling rock has a speed of 1.5 m/s. What is the velocity of the rock when it hits the ground 5 seconds later? Give the magnitude and direction

    asked by Bob on March 13, 2016
  44. physics

    If you walk for 1.66min at a speed of 1.22m/s and then run for 1.66min at 3.05m/s along a straight track, what is the average velocity?

    asked by Brittany on August 22, 2012
  45. phys4

    A hang glider moving at speed 9.0 m/s dives to an altitude 4.2 m lower. Ignoring drag, how fast is it then moving?

    asked by opp on February 26, 2012
  46. physics

    If a proton were traveling the same speed as electrons in a TV picture tube (about 7.2 107 m/s), what would its de Broglie wavelength be? The mass of a proton is 1.67 10-27 kg.

    asked by Anonymous on April 22, 2014
  47. physics

    A golf ball is thrown at an angle of 37 degree with horizontal with initial speed of 50 m/s. what is the maximum horizontal distance???

    asked by help urgent Hanan on August 24, 2012
  48. Science

    a pendulum bob has by passing through its lowest position. what is its speed when make angle of 60 with the vertical the length of the pendulum is 0.5 .

    asked by Ankit on February 7, 2017
  49. physics

    A golf ball is thrown at an angle of 37 degree with horizontal with initial speed of 50 m/s. what is the maximum horizontal distance???

    asked by Hanan on August 24, 2012
  50. Physic

    If a clock in an airplane is found to slow down by 5 parts in 1013, (i.e., ∆t/∆to = 1.0 + 5.0 × 10. −13), at what speed is the airplane travelling? (Hint: You might need to use an expansion for y)

    asked by Sanaz on August 22, 2012
  51. physics

    A 10 μC charge of mass 20 g, initially at rest at x = - 1 m in a constant electric field E = 2000 V/m is released from rest. What is its speed at x = 5 m?

    asked by sophie moagi on August 12, 2015
  52. physics

    IF A RUNNER RUNS THE 100 METER DASH IN APPROXIMATELY 9.7 SEC, WHAT IS THE AVERAGE SPEED OF THE RUNNER IN MPH?

    asked by MANN on September 27, 2011
  53. physics

    blood is pumped from the heart at a rate of 5.0l/min into the aorta (radius 1.0cm)determinethethe speed of the blood

    asked by moni on February 5, 2017
  54. science

    a car eneters a freeway with a speed of 6.7 m\s and accelerates uniformly for 3.0 I 3.8 min . how fas the car moving after this time?

    asked by Monique on September 22, 2013
  55. physics

    a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.? Thank you

    asked by Raf on September 21, 2011
  56. Physics

    A soccer ball is kicked with the initial speed of 10.7m/s . After 0.780s it is at its highest point. What was its initial direction of motion?

    asked by Roxy on September 2, 2013
  57. Physics acceleration

    A car accelerates uniformly from rest to a speed of 91.4 mi/h in 7.68 s. Find the constant acceleration of the car. Answer in units of m/s

    asked by Jackie on October 1, 2015
  58. math

    moe ran 3/4 a mile in 15 minutes.if he runs at the same constant rate of speed how long will it take him to run one mile

    asked by agatha on October 5, 2018
  59. Physics

    A truck travels up a hill. With a 6.5 incline the truck has a constant speed of 17 m/s what is the horizontal component of the trucks velocity

    asked by Nathan on October 4, 2018
  60. Physics

    A car with 60 cm diameter tires is traveling at a constant speed of 100 km/hr. What is the angular velocity of the tires in rad/s?

    asked by Bryan on November 14, 2012
  61. Physics for Life science

    1.You are riding on a 20m diameter Ferris wheel. when your cart is at the bottom, you feel twice as heavy as you normally are. what is the speed of the wheel?

    asked by Simeon on May 3, 2010
  62. physics

    In the diagram below, a water wave having a speed of 0.25 meter per second causes a cork to move up and down 4.0 times in 8.0 seconds. What is the wavelength of the wave is it 2m?

    asked by tom on October 3, 2018
  63. Physics

    A car accelerates uniformly in a straight line from rest at the rate of 2.7 m/s 2 . What is the speed of the car after it has traveled 58 m? Answer in m/s

    asked by Hayley on September 18, 2011
  64. Physics

    A bowling ball weighing 67.0 N initially moves at a speed of 4.80 m/s. How long must a force of 54.5 N be applied to the ball to stop it?

    asked by Anonymous on February 24, 2012
  65. physics

    A figure skater is warming up on the rink. She does a lap of a 100m rink. She completes the laps in 3 minutes. What was her speed?

    asked by dave on September 19, 2011
  66. Physics

    Microwaves travel at the speed of light, 3.00×108 m/s. When the frequency of microwaves is 5.60×109 Hz, what is their wavelength? Answer in units of m.

    asked by Sangita on February 16, 2011
  67. Physics

    a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.?

    asked by Rafael on September 20, 2011
  68. Physics

    A ball is thrown directly downward, with an initial speed of 6.10 m/s, from a height of 31.0 m. After what interval does the ball strike the ground?

    asked by Megan on January 23, 2011
  69. Physics

    The speedometer of your car shows that you are traveling at a constant speed of 35 m/s. Is it possible that your car is accelerating? yes no If so, explain how this could happen. see the above post.

    asked by Mary on March 20, 2007
  70. physics

    An aircraft in a straight line with a constant speed of 450km.h ,What is the magnitude of the resultant force acting on the aircraft?

    asked by rose on February 22, 2013
  71. physics

    you are riding on a 20 meter diameter ferris wheel. when your cart is at the bottom. you feel as heavy as you normally are. what is the speed of the wheel

    asked by dai on May 4, 2010
  72. math

    if the speed of a comet at perihelion (the closest orbital point to the sun) is 98000 mi/h. How far will the comet travel in 30 sec?

    asked by angel on August 9, 2012
  73. Physicss

    a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.? Thank you

    asked by Rafael on September 20, 2011
  74. PHYSICS (PLEASE READ)

    I tried all the formulas i know but i cannot answer it I really need your help in this question.. A projectile was launched 64° above the horizontal, attaining a height of 10 m. What is the projectile's initial speed?

    asked by kike paul on November 24, 2011
  75. Physics

    a stone is thrown horizontally from the edge of the cliff with speed of 18m/sec. Cliff is 50 meters high

    asked by Jay on September 20, 2011
  76. SCIENCE

    A string of length 8 m fixed at both the ends has a tension of 49 N and a mass 0.04 kg. Find the speed of transverse waves on this string.

    asked by SANDEEP SINGH on March 22, 2012
  77. physics

    A rocket blasts off from rest and attains a speed of 58.9 m/s in 14.4 s. An astronaut has a mass of 57.5 kg. What is the astronaut's apparent weight during takeoff?

    asked by Maddie on October 28, 2014
  78. physics

    The length of the B string on a certain guitar is 60.0 cm. It vibrates at a fundamental frequency of 246.0 Hz. What is the speed of the transverse waves on the string?

    asked by Jac on April 8, 2016
  79. physics

    A car accelerates uniformly from rest to a speed of 73.6 mi/h in 7.68 s. Find the constant acceleration of the car. Answer in units of m/s 2

    asked by tom on October 21, 2014
  80. physics

    A bowling ball weighing 40.0 N initially moves at a speed of 4.90 m/s. How long must a force of 54.0 N be applied to the ball to stop it?

    asked by klbiesec on October 17, 2011
  81. P.E

    The ability to perform a movement within a short period of time is known as A.agility B.reaction time C.power D.speed

    asked by Eugene on January 8, 2014
  82. physics

    A bowling ball weighing 40.0 N initially moves at a speed of 4.90 m/s. How long must a force of 54.0 N be applied to the ball to stop it?

    asked by Kellie on October 16, 2011
  83. math

    algebra is used to solve problems of age, speed,unknown numbers. What are other parts of word problems you know atleast 12 ?

    asked by kevi on March 15, 2019
  84. SCIENCE

    WHAT IS THE AVERAGE SPEED [KM/H] FOR A CAR JOURNEY OF 120 KM THAT BEGAN AT 9:30 A.M. AND FINISHED AT 11:30 A.M.? HINT HOW MANY HOURS ARE BETWEEN 9:30A.M. AND 11:30A.M

    asked by EDUARDO on October 16, 2011
  85. physics

    The boy on the tower of height h = 20 m in the figure below throws a ball a distance of x = 52 m, as shown. At what speed, in m/s, is the ball thrown?

    asked by Anonymous on February 9, 2011
  86. physics

    A motor boat heads east across a river at 5.1 m/s. The river flows south at 2.1 m/s. Calculate the resultant speed.

    asked by Elizabeth on September 3, 2012
  87. Physics

    What are the direction and magnitude of your total displacement if you have traveled due west with a speed of 25.0 m/s for 125 s, then due south at 19.0 m/s for 66.0 s?

    asked by Anonymous on September 10, 2012
  88. physics

    A car accelerates uniformly from rest to a speed of 73.6 mi/h in 7.68 s. How do i find the distance the car traveled during this time, in units of m

    asked by tom on October 22, 2014
  89. Physics

    A ball is thrown directly downward with an initial speed of 7.00 m/s, from a height of 36.00 m. How long does it take the ball to strike the ground?

    asked by GraceW1 on September 8, 2015
  90. Math

    termine the maximum height on the wall to which the firefighter can project water from the hose, if the speed of the water at the nozzle i�

    asked by Hhh on April 6, 2019
  91. algebra

    conversion practice. show all work!!! 1. an emu can run 31 miles per hour. what is the emu's speed in feet per second?

    asked by sahsa on September 8, 2015
  92. Physics

    A machine gun fires 10 rounds per second. The speed of the bullets is 300m/s. 9.What is the distance in the air between the flying bullets?

    asked by Mero on April 28, 2016
  93. Physics please help!!

    If a woman lifts a 19.3 kg bucket from a well and does 6.10 kJ of work, how deep is the well? Assume that the speed of the bucket remains constant as it is lifted

    asked by Megan on February 7, 2011
  94. physics

    The speed of light is measured to be 1.50 ×108 m s–1 in a sucrose water solution. Calculate the refractive index of the solution.

    asked by wwrr on March 6, 2017
  95. Physics

    A sound wave in air has a frequency of 240 Hz and travels with a speed of 334.7 m/s. How far apart are the wave crests (compressions)?

    asked by Andrewk on March 12, 2013
  96. Physics

    A student rides his skateboard for 10 minutes and travels 1.2 miles. What is the average speed of the skateboarder in miles/minute?

    asked by Tesha on September 14, 2015
  97. physics

    An unidentified flying object is cruising 30.0° north of east at a speed of 2132 km/h. How fast is it moving to the north?

    asked by anon on November 12, 2014
  98. Physics

    A ball is thrown horizontally from the roof of a building 55 m tall and lands 50 m from the base. What was the ball's initial speed?

    asked by Millie on October 13, 2011
  99. Physics

    A particle travels 15 times around a 10-cm radius circle in 42 seconds. What is the average speed (in m/s) of the particle? = I think I use the v=(2pi*r)/T equation? Right?

    asked by Mark on March 13, 2012
  100. physics

    7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car?

    asked by muller on July 3, 2010

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