1. Physics

    A police car is traveling at a velocity of 20.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the

    asked by Candice on September 29, 2014
  2. Solved-Calculus-Please check?

    the equatorial radius of the earth is approximately 3960 miles. suppose a wire is wrapped tightly around the earth at the equator. how much must this wire be lengthened if it is to be strung on 10 feet poles above the ground? (1 mile=5280 feet) delta y=

    asked by Liliana on April 24, 2013
  3. History

    what did reconstruction fail to do in south carolina? A.readmit the state to the union B.establish the belief in white supremecy among some group C.return control of state politicsto local leaders D.free african americans from slavery? I Got C but im not

    asked by Help me,plz on March 3, 2015
  4. math

    An airplane leaves Atlanta at 2 PM and flies north at 250 miles per hour. A second airplane leaves Atlanta 30 minutes later and flies north at 280 miles per hour. At what time will the second airplane overtake the first? Answer Choices 6:20 PM 6:00 PM 6:40

    asked by Zara on October 30, 2016
  5. physics

    a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the

    asked by jacquie on December 7, 2010
  6. physics

    a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the

    asked by jacquie on December 7, 2010
  7. algebra 2

    two cars leave an intersection. one car travels north; the other east. when the car traveling north had gone 15 miles, the distance between the cars was 5 mile more than the distance traveled by the car heading east.how far had the east bound car traveled?

    asked by amanda on March 18, 2012
  8. chemestry

    Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 balanced directed to first post. You need to calculate the E value to determine if it is spontaneous or not. Please

    asked by bik on May 16, 2007
  9. Math

    Mercury's average distance from the sun is 57,910,000 km. The Earth is approximately 93,000,000 miles from the sun What would be the distance of a trip from Mercury to Earth, via the Sun. Look out for the units!!! (1 km =(0.62mi) Use Scientific Notation to

    asked by Howayda on January 10, 2016
  10. Math

    Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different

    asked by Tisha on April 7, 2010
  11. 7th Grade Math

    The weight of an object on the moon varies directly as the weight of the object on Earth.A 90-pound object on Earth weights 15 pounds on the moon.if an object weights 156 pounds on Earth, how much does it weights on the moon? A.23 pounds B.26 pounds C.28

    asked by I dont get this :/ on August 13, 2017
  12. Science

    Please unscramble this word snagenhhi P.s it's a type of snake and its found in NorthAmerica I checked this list of North American snakes and didn't find any with two h's in its name. http://www.pitt.edu/~mcs2/herp/SoNA.html if the h's are k's, then king

    asked by Fia on April 8, 2007
  13. science - physics

    A plane flies with a velocity of 52 m/s east through a12 m/s cross wind blowing the plane south. Find the magnitude and direction (relative to due east) of the resultant velocity at which it travels.

    asked by michelle on September 28, 2011
  14. Physics

    A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1/6g Find the reading of the spring

    asked by Mike on January 25, 2013
  15. Please Please help! English

    Which of the following sentences DOES NOT illustrate subject- verb agreement. 1.Each of the players need a locker. 2.He said that the computer is broken. 3.There go the members of the cast. 4.We knew that rivers flow south. 1.Each of the players need a

    asked by Anonymous on October 14, 2006
  16. Science Physics

    An object weighs 12 N on earth. When it is brought to Mars, it has a weight of 4.8 N. What is the acceleration due to gravity on Mars? (Taking the acceleration due to gravity on earth is 10 m/s²)

    asked by Sarah on April 1, 2013
  17. physics

    Two satellites are monitored as they orbit the earth,satellites Y is foure times as far from earth's centre as is satellite X. IF the period of revolution of satellite X is T. WHAT IS THE PERIOD OF REVOLUTION OF OF Y?

    asked by barch on November 14, 2015
  18. physics

    At the surface of Jupiter's moon Io, the acceleration due to gravity is 1.81 . A watermelon has a weight of 43.0 at the surface of the earth. In this problem, use 9.81 for the acceleration due to gravity on earth

    asked by Anonymous on February 21, 2011
  19. physics

    An astronaut in full gear has a weight of 2900 N on Earth. Jupiter; weight on planet relative to earth is 2.53 and weight of a 150-lb person is 380. How much will the astronaut weigh on the Jupiter? W_{Jupiter} =________________ N Neptune; weight on planet

    asked by Melissa on March 3, 2014
  20. Chemistry

    Shown below are several options for the box notations of the ground state electron configuration of the following gas-phase species. Identify the correct electronic configuration. i. Al2− ii. Mn (a)Select the reason that best explains why the first

    asked by c on January 11, 2013
  21. english help please!!

    Read the following excerpt from H.G. Wells' The War of the Worlds, and answer the question that follows: The planet Mars, I scarcely need remind the reader, revolves about the sun at a mean distance of 140,000,000 miles, and the light and heat it receives

    asked by Oscar on March 14, 2016
  22. Physics

    A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was

    asked by Emily on December 10, 2010
  23. Physics

    A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was

    asked by Emily on December 10, 2010
  24. Physics

    A police car is traveling at a velocity of 19.0 m/s due north, when a car zooms by at a constant velocity of 49.0 m/s due north. After a reaction time 0.600 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the

    asked by Tonya on September 16, 2013
  25. physics

    A police car is traveling at a velocity of 19.0 m/s due north, when a car zooms by at a constant velocity of 49.0 m/s due north. After a reaction time 0.600 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the

    asked by Katy on September 15, 2013
  26. physics

    A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 5.00 m/s^2. Including the

    asked by louis aaaa on June 18, 2013
  27. Physics

    A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 40.0 m/s due north. After a reaction time 0.500 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the

    asked by Kaitlyne on September 10, 2013
  28. Physics

    A police car is traveling at a velocity of 20.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the

    asked by Peanutbutter7 on September 27, 2014
  29. physics

    A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 45.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 3.00 m/s^2. Including the

    asked by colby on September 7, 2012
  30. physics

    A spring scale being used to measure the weight of an object reads 12.8 N when it is used on earth. The spring stretches 4.95 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1/6g. Find the reading of the

    asked by Anonymous on March 28, 2011
  31. english

    Please help if my answers are correct and let me know the correct answers below. thank you. Can we see (1) _____ the earth is a globe? Yes, we can. When we watch a ship that sails out to sea, we can see that the ship begins (2) _____. The bottom of the

    asked by jessie on April 28, 2017
  32. Physics

    Show that the total mechanical energy of a satellite (mass m) orbiting a distance r from the center of the Earth (mass M-e)is: -(1/2)*(G m M-e)/(r if U = 0 at r = infinity. Show that although friction causes the value of E (mechanical energy) to decrease

    asked by Anonymous on March 21, 2008
  33. Chemistry

    Here are the effective nuclear charges, Zeff, for the valence electrons of four different atoms. 1.30, 1.95, 2.60, 3.25 In order, these values could belong to what list of elements? Sr, Ca, Mg, Be Be, Mg, Ca, Sr C, B, Be, Li (or) Li, Be, B, C Here are the

    asked by marie darling on April 2, 2013
  34. chemistry

    1. Calcuate the distance(km) from the Earth to the Moon if it takes light 1.3 seconds to make the trip? 2. Saturn is about 1.2 billionkm from Earth. How long does it take light to travel that distance? (I was only given the wave equation, Max Plancks

    asked by Brooke N on November 11, 2015
  35. algebra

    1.) The volume of a rectangular box is 64 ft3. If the width is 3 times longer than the height, and the length is 9 times longer than the height, find the dimensions of the box. Define your variables then show all work using the equation editor. Write a

    asked by ashley on August 10, 2016
  36. History

    I have multiply questions and would appreciate if you could either tell me about it or send me a link to something, I've checked my history books and can't find nothing. Who didn't like Lincoln's 10% reconstruction plan? Did Lincoln's death impact or

    asked by Toad-Stool on April 25, 2018
  37. algebra

    A pilot heading his polane due north finds the actual direction of travel to be 5.2 NE. The planes's air speed is 315 mi/h, and the wind is from die west. Find the plane's ground speed and the velocity of the wind.

    asked by Arielle on November 2, 2011
  38. trig

    a plane is flying with airspeed of 140 mph and heading 280 degrees. The wind currents are running at 20mph at 260 degrees clockwise from due north. Find the true course and ground speed of the plane.

    asked by Frankie on August 19, 2011
  39. physics

    a woman walks 250 m in the direction 30 degree east of north,then 175 m directly east.A) using graphical methods,find her final displacement from the starting point.B) compare the magnitude of her displacement with the distance she walked.,

    asked by mark paul on July 4, 2011
  40. Social Studies

    One reason for the difference between average temperatures in Rome when in Jan. the average temperature is 11 degrees Celsius and July average degree is 30 degree Celsius is: The amount of carbon dioxide present in the atmosphere The tilt of the Earth of

    asked by Sue on October 22, 2014
  41. Pre-Calculus

    Point B is 12 km north of point A. Point C is 9 km from point B on a bearing of 060°. Find the distance from A to C.

    asked by Gabby on January 14, 2013
  42. Physics

    At the surface of a certain planet, the gravitational acceleration g has a magnitude of 12.0 m/s^2. A 21.0-kg brass bell is transported to this planet. What is (a) the mass of the brass ball on the Earth and on the planet, and (b) the weight of the brass

    asked by Luce on November 4, 2016
  43. Geometry

    A city has a scale model of the solar system nearly 6 km long. The model's scale is 1 km : 1 billion km. a. Earth is 150,000,000 km from the Sun. How many meters apart are Earth and the Sun in the model?

    asked by Anonymous on December 31, 2011
  44. physics

    The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.

    asked by Sandy on December 9, 2009
  45. physics

    The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.

    asked by Cory on November 18, 2009
  46. English

    Thank you very much for your corrections. I still have a few alternatives for you to check. 1) The demand for new clothes created the necessity (better: caused the development of new machinery?) to invent machinery for cloth-making. 2) New factories were

    asked by Franco on November 26, 2010
  47. science

    the free-fall acceleration on the surface of the moon is appromimately 1/6 of the free-fall acceleration on the surface of earth. compare the period of a pendumlum on earth with that of an identical pendulum set in motion on the moon

    asked by sake on April 3, 2008
  48. Geometry

    The radius of Jupiter is approximately 44,423 miles, and the radius of the Earth is approximately 3,960 miles. How many times larger is the volume of Jupiter than the volume of the Earth? Round your answer to the nearest whole number.

    asked by Anonymous on November 18, 2014
  49. Physics

    NASA lost contact with Pioneer 10 on January 22, 2003. How far in meters was it from the sun on that date? Pioneer 10 was traveling at 12.24 km/s relative to the sun. Calculate the position of Pioneer 10 as of January 2009 relative to the sun. Pioneer is

    asked by Madison on December 2, 2015
  50. Trig application

    I am having trouble with this question. A privately owned yacht leaves a dock in Myrtke Beach, South Carolina, and heads toward Freeport in the Bahamas at a bearing of S 1.4 degrees E. The yacht averages a speed of 20 knots over the 428-nautical- mile

    asked by Hutch on February 21, 2015
  51. english

    I need to find rhetorical devices in this speech. -- Pearson’s address on the inauguration of the national flag of Canada: On September 5, 1945 an Order-in-Council was passed declaring the Red Ensign to be Canada's National Flag pending a decision of the

    asked by Jimmy on July 5, 2010
  52. oceanography

    1. How much of the total water at earth's surface is fresh water? 2. Of all the freshwater at the earth's surface, what percent is found as ice and glaciers? 3. What percent of all freshwater is groundwater? 4. What percent of the rainfall that falls on

    asked by Ashley on December 12, 2006
  53. Astronomy

    For this question assume the moon is 110 of its diameter away from the Earth. The largest apparent size of Mercury that we ever see in the sky is 1/150 the apparent diameter of the Moon. The diameter of Mercury is about 4900 km. What is the closest that

    asked by Elisabeth on August 27, 2013
  54. Phizzics....

    How does the weight of a Mars lander change as it travels from Earth to Mars? Does the weight ever equal zero? Does the mass of the lander change? Explain your answer. (Hint: restrict your analysis to a system consisting of Earth, Mars and lander.)

    asked by dreamygirl on May 15, 2012
  55. Science

    If you are one mile off the beach in the Atlantic Ocean, how deep is the ocean? Thanks for your help. Which beach? Is it in Europe, North America, Africa, South America or Antarctica? We'll try to research your question if we know the exact location of

    asked by Beth on August 5, 2006
  56. APChem

    "Part A: Most of the transition metals form brightly colored ionic substances. Which elements located in the first row transition metals cannot form ionic compounds? Explain. Part B: Explain why representative metals do not form colored compounds." I am

    asked by Marta on March 18, 2010
  57. geometry

    the area of the rectangular playground enclosure at South School is 500 square meters. The length of the playground is 5 meters longer than the width. Find the dimensions of the playground, in meters.

    asked by ni on September 12, 2010
  58. Science

    The words to use are: crust, moving, lithosphere, asthenosphere, upper mantle, volcanoes, semisolid The ___1___, which includes the ___2___ and part of the ___3___, is divided into plates that carry all of Earth's lands and oceans. These plates float on a

    asked by Ari on February 16, 2017
  59. Physics

    A person walks 10.4 degrees north of east for 4.19 km. Another person walks due north, then due east to arrive at the same location. How far would this person walk due east? Answer in units of km

    asked by Wendy on November 3, 2014
  60. PHYSICS

    A person walks 10.4 degrees north of east for 4.19 km. Another person walks due north, then due east to arrive at the same location. How far would this person walk due east? Answer in units of km

    asked by Wendy on November 4, 2014
  61. physics

    A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to

    asked by john on August 25, 2016
  62. physics vectors

    A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to

    asked by john on August 24, 2016
  63. physics

    the gravity that sun has on the moon is about 2 times more than the gravity from earth so why doesn't moon run away from earth to sun?

    asked by farnoosh on December 21, 2011
  64. science

    The mass of the girl in earth is 24kg. What is her mass and weight in moon if the moon's gravity is 1/6 of the earth' gravity?

    asked by angela on June 15, 2016
  65. Maths Algebra

    The diameter of Sun is (1.4 ×10^8)m and the diameter of Earth is (1.2742×10^4)m . Show that the diameter of sun is nearly 100 times the diameter of Earth.

    asked by Vivek on August 19, 2016
  66. Social Studies

    Ms. Sue, please help! I'm doing a correction for one of my tests that I got a bad score on. I wrote my answer and I don't know if it sounds right. Can you help, and if it isn't right can you help me say it in another way? Thanks! Here's the question: What

    asked by unknownxo on December 14, 2018
  67. math,algebra

    How do I even write an equation for this problem all i need someone to show me how to get an equation so i can solve it. It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number of species living

    asked by Jasmine20 on December 12, 2006
  68. Science

    Do you know how big the Sun is? The Sun is 400 times as big as the Moon and 400 times as far away. The Moon: 2.5mm diameter a) How big would the Sun be if the Moon were the size shown above? b) The Sun is actually about 865,000 miles in diameter, so 1 cm

    asked by luca on January 10, 2009
  69. Science

    So I need help with a lab, I'm not looking for answers, I want to know if my answers make sense, so this is the pre lab introduction: In a series circuit, electrons travel along a single pathway. The movement of the electrons through the circuit produces

    asked by ItsGottaGetEasier on May 24, 2018
  70. physics

    On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.9 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 42° above

    asked by Anonymous on October 19, 2010
  71. physics

    What is the longest wavelength of light that will emit electrons from a metal whose work function is 3.10eV?

    asked by Anonymous on April 24, 2009
  72. Physics

    Two spherical objects with a mass of 7.60 kg each are placed at a distance of 2.93 m apart. How many electrons need to leave each object so that the net force between them becomes zero?

    asked by Becky on June 6, 2012
  73. physical science

    is this correct or incorrect nonmetal are elements that tend to gain electrons in chemical reactions.

    asked by liz on November 3, 2007
  74. Physics

    How much work must be done to bring three electrons from a great distance apart to within 2.1×10−10 {\rm m} from one another (at the corners of an equilateral triangle)?

    asked by Tiffany on February 6, 2011
  75. Chemistry

    How many electrons does the bromine of BrF3 have in its outermost valence shell? Is it still seven like it would be when Br is by itself? Is it four because the three F would "take" one each to fill their octets? Or is it some other number?

    asked by T on April 30, 2016
  76. ap chem

    in a sigma antibonding orbital where are the electrons most likly to be found in relation to the nuclei in a bond?

    asked by mary on January 2, 2013
  77. Chemistry

    What is the maximum number of electrons in an atom that can have the following quantum numbers? n= 4 ml= -3 ms= +1/2 How would you figure that out given those information? What's the process of that?

    asked by Ezra on November 4, 2012
  78. science

    how much work is done in bringing three electrons , which are intially a great disance apart to how fats will it be moving then it is at distance ?

    asked by mohit on July 19, 2012
  79. science

    what is the correct number of protons, neutrons and electrons in a neutral Cadmium-112 atom?

    asked by duane on July 14, 2014
  80. Physics

    An experimenter finds that no photo-electrons are emitted from tungsten unless the wavelength of light is less than 270nm.

    asked by Paul on September 23, 2014
  81. ap chem

    All the electrons of this element are spin-paired. Carbon Nitrogen Oxygen Flourine Neon

    asked by Liz on September 2, 2008
  82. Physics

    Two spherical objects with a mass of 2.88 kg each are placed at a distance of 2.12 m apart. How many electrons need to leave each object so that the net force between them becomes zero?

    asked by Tanner on June 7, 2012
  83. Physical Science

    If an element has a +1 positive charge and the following chemical symbol, how many electrons does it have? 17 on top, 6 on bottom, Oxygen (O) A. 7 B. 17 C. 5 D. 18

    asked by Hannah on February 14, 2017
  84. Chemistry

    If your body develops a charge of -17 (microcoulombs), how many excess electrons has it acquired, and what is their collective mass?

    asked by Brittney on September 9, 2012
  85. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 2, 2018
  86. chemistry

    A cell, transferred 0.146 mol of electrons with a constant current of 1.24 A. How long, in hours, did this take?

    asked by Rishikesh on April 20, 2008
  87. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 2, 2018
  88. chemistry

    Predict Zeff for the outermost electrons in the Rb atom based on the calculations for Na and K using Slater's rules.

    asked by hiphop on April 10, 2014
  89. physics

    The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be

    asked by Sara on March 24, 2012
  90. Chemistry

    Draw the Lewis dot diagram of CO2, how many types of electrons are in the valence bond?

    asked by Cro on April 24, 2013
  91. Physics

    Two electrons are fixed 2.99 cm apart. Another electron is shot from infinity and stops midway between the two. What is its initial speed?

    asked by Phil on February 9, 2012
  92. Chemistry

    Electrons in the outermost principal shell of an atom that are involved in chemical bonding are referred to as:

    asked by Ed on November 14, 2011
  93. chemistry

    In diatomic molecules of elements, the electronegativites of the two atoms are _________, so the electrons are shared ___________.

    asked by claire on April 26, 2010
  94. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 2, 2018
  95. Science

    Which element has 6 energy levels and 7 valence electrons? Astatine (At) Polonium (Po) Seaborgium (Sg) Rhenium (Re)

    asked by ? on February 1, 2018
  96. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 1, 2018
  97. chemistry

    Calculate the current required to transfer 0.015 mols of electrons in a time of 20 min

    asked by Priya on April 22, 2008
  98. Chemistry

    The element in the period 2 group 6 gains/ loses ______ electrons to become a cation/ anion?

    asked by Mileena on March 6, 2017
  99. Science

    How does the movement of electrons and protons create large amounts of energy in oxidative phosphorylation?

    asked by EL on March 1, 2011
  100. chemistry

    WOuld you expect each of the following atoms to gain or lose electrons when forming ions? What ion is most likely in each case? a. Na b. Sr c. P d. Ba

    asked by shirley on September 7, 2009