1. physics

    The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg, mass of moon=7.35 × 1022 kg. The distances shown in the

    asked by Kristyn on March 28, 2015
  2. AP Physics

    An object has a mass of 80 kg on earth. the acceleration of gravity on Mars is about 1/4 of the acceleration of gravity on Earth. What is the weight of the object on Mars?

    asked by Betsy on October 24, 2010
  3. PHYSICS

    assume you have a mass of 100 kg on earth. on the moon, where the gravitation of the moon is 1/6 gravitation of the earth, what is your mass on the moon and what is your weight on the moon

    asked by Katie on December 23, 2010
  4. Physics

    The gravitational constant for Earth is gE = 9.8m/s2. The gravitational constant for the planet Mongo is 20 m/s2. If an object has a mass of 10 kg on earth, what is its mass on Mongo?

    asked by Paige on February 21, 2011
  5. science

    Which of the following best supports the idea that the melting of glaciers in Antarctica is a global environmental threat? A. The melting of glaciers can cause sea levels on Earth to fall. B. The melting of glaciers can change ecosystems in Antarctica. C.

    asked by Anonymous on December 13, 2013
  6. Physics

    A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one

    asked by Mary on March 14, 2007
  7. Physics

    A 0.59g mass of Glynnium goes through a nuclear fission reaction. The energy from the process is used to lift a 97211kg Saturn 5 rocket into orbit. If the mass is transformed with 1% efficiency, what height does the rocket reach? Express your answer in

    asked by yy on June 11, 2017
  8. physics

    Deimos, a moon of Mars, is about 12 km in diameter, with a mass of 2.0x10^15kg. Suppose you are stranded alone on Deimos and want to play a one-person game of baseball. You would be the pitcher, and you would be the batter! With what speed would you have

    asked by sam on October 19, 2009
  9. Physics

    A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m . If the star initially rotates at the same rate as

    asked by Viert on December 7, 2015
  10. physics

    A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m If the star initially rotates at the same rate as

    asked by clara on March 9, 2017
  11. ap physics

    A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m . If the star initially rotates at the same rate as

    asked by clara on March 8, 2017
  12. ALGEBRA

    1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where

    asked by GGIFT on March 23, 2010
  13. science

    why isn't pluto a planet anymore? http://en.wikipedia.org/wiki/Pluto Because Pluto's orbit crosses those of the other planets therefore makeing it ineligible to be a planet for not meeting certain standards that have been lain out.

    asked by Carina on May 11, 2007
  14. PHYSICS HELP

    Suppose the aliens watching the show are on the surface of Mars. Mass of Mars: 6.42 x 10^23 kg Radius of Mars: 3.394 x 10^6 m Calculate; A) the weight of a 40.0 kg alien on Mars B) the weight of 40.0kg alien on earh Earth-sun distance:1.50x10^11m Mars-sun

    asked by Maddie on March 26, 2015
  15. Physics

    Two main strategies are employed to deflect an asteroid: destruction or slowing it down by at least 425 s so that the earth can move out of the impact zone. Assume perfect inelastic collision. (a) If we know the speed of the asteroid (va), mass (ma), and

    asked by Milan on October 23, 2013
  16. Math

    The weight of an object on the planet Mercury is about 2/5 the weight of that object on the Earth. An object that weighs 30 pounds on Earth would weigh how many pounds on Mercury?

    asked by Michael on February 8, 2012
  17. Physics

    The moon rotates about its axis every 27.3 days and orbits the earth every 27.3 days. A) what is the moment of inertia with respect to its axis? B) What is the moment of inertia with respect to the earth? C) What is the moons angular momentum with respect

    asked by Anonymous on May 10, 2018
  18. Physics

    A spacecraft approaching the earth launches an exploration vehicle. After the launch, an observer on earth sees the spacecraft approaching at a speed of 0.74c and the exploration vehicle approaching at a speed of 0.98c. What is the speed of the exploration

    asked by Beth on July 20, 2012
  19. Science please help :)?

    3. which if the following factors determines how long a star will live ? ( 1point ) A . star’s color b. the star’s mass**** c. the star’s diameter d. the star’s distance from the sun 4 . which of the following causes constellations to appear to

    asked by Cami on October 22, 2015
  20. Physics

    The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average distance between the earth and the sun is 1.50E11 m. What is the average power emitted by the Sun? Ok so intensity is power over

    asked by Raquel on November 16, 2011
  21. sdvfsd

    The earth has a specific tilt to it. No the sun appears to move towards the north and the south but through all the time the rays of the sun fall directly at the equator but fall at an inclined level at the other places and hence the seasons change and

    asked by vf on January 8, 2015
  22. Math

    You have 200 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river, find the length and width of the plot that will maximize the area _____________________________________ Among all pairs of

    asked by Cassidy on October 18, 2011
  23. physics

    The weight of an astronaut plus his space suit on the Moon is only 270 N. A. How much do they weigh on Earth, in Newtons, assuming the acceleration due to gravity on the moon is 1.67m/s^2= 1584is this right? B. What is the mass of the astronaut and his

    asked by David on October 9, 2014
  24. Chemistry

    About twenty radioisotopes with ultra-long half-lives, from 82 million years (244- Plutonium) to 6 million billion years (50-Vanadium) are found in the earth’s crust, yet no radioisotopes with half-lives less than 70 million years (146- Samarium) are

    asked by Allie on November 17, 2009
  25. physics

    At the equator, the earth’s field is essentially horizontal; near the north pole, it is nearly vertical. In between, the angle varies. As you move farther north, the dip angle, the angle of the earth’s field below horizontal, steadily increases. Green

    asked by Tom on April 15, 2011
  26. ss

    what are latitude and longitude? lines of __________ and lines __________ cross one another. they form a ____________ around the earth. lines of latitude lines of latitude are also called___________ they circle the earth parallel to the_______ they measure

    asked by ss on August 24, 2015
  27. GLOBE/GEOGRAPHY HELP

    Rotate the Earth using the arrows on the globe that show the direction of rotation. As viewed from the North Pole, what direction is the Earth spinning? clockwise or counter-clockwise? I suggest you do this exercise in class, since that globe apparently

    asked by Suzanne on October 11, 2006
  28. physics ...plzzzz help...

    1 ) If the mass of the Moon is 7.4 x 1022 kg and its radius is 1.74 x 106 m, compute the speed with which an object would have to be fired in order to sail away from it, completely overcoming the Moon’s  gravity  pull. 2 ) Show that if a satellite

    asked by rachel on May 29, 2012
  29. Science

    1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and

    asked by Anonymous on November 6, 2017
  30. Science

    1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and

    asked by Help Me on November 6, 2017
  31. physics

    A dumbbell has a mass m on either end of a rod of length 2a. The center of the dumbbell is a distance r from the center of the Earth, and the dumbbell is aligned radially. If r≫a, the difference in the gravitational force exerted on the two masses by the

    asked by brooklyn on December 2, 2015
  32. Physics Help

    A dumbbell has a mass m on either end of a rod of length 2a. The center of the dumbbell is a distance r from the center of the Earth, and the dumbbell is aligned radially. If r≫a, the difference in the gravitational force exerted on the two masses by the

    asked by jacob on December 7, 2015
  33. science

    An astronaut who weighed 170 pounds on Earth found that his weight on Jupiter was 400 pounds. He captured an alien that weighed 120 pounds on Jupiter. What is the alien's weight on Earth? A. 34 pounds B. 51 pounds C. 78 pounds D. 283 pounds

    asked by Spartans on February 13, 2015
  34. World Geo, Help pls

    Please help!!! Which of the following is not true about Aborigine culture? (1 point) It is the oldest surviving culture on Earth. Traditional Aborigine societies formed agricultural settlements. Aborigines do not believe that land belongs to humans.

    asked by mia on April 27, 2015
  35. Physics

    On the earth, you throw an object up in the air at some velocity, v, and it reaches a maximum vertical displacement (max. height if you prefer) of 4.8 meters. If you went to the moon, where the value of the gravitational acceleration of the moon is 1/6 of

    asked by Micheal G. on September 16, 2011
  36. English

    This question is based on the following poem: Seasons are celebrations. A year's a Ferris wheel. Both honor our world's habit of spinning 'round a star. 7. Which one of the following sentences best expresses the main idea of this poem? A. The world has a

    asked by Nikita on May 5, 2013
  37. physics mc question!!!!HELP

    Question # 1 : It a particle increases its speed by a factor of 2, what happens to the kinetic energy? a)doubles b)cuts in half c)increases by a factor of 4 d)depends on whether or not work is done on the particle Question # 2: An object falling near the

    asked by lilly on May 23, 2012
  38. AP Physics Halley's Comet

    Halley's comet orbits the sun roughly once every 76 years. It comes very close to the surface of the Sun on its closest approach. Estimate the greatest distance of the comet from the sun. Is it still in the Solar System? What planet's orbit is nearest when

    asked by Henry on October 2, 2009
  39. Physics (please check)

    A 6.0kg block is released from rest 80m above the ground. When it has fallen 60m its kinetic energy is: I got 1200J as my answer mgh=(6.0*9.81* 60m)=3531.6 PE + KE= (ME + KE) 3531.6 + KE= (6.0*9.81*80m) KE= 1177.2 is that right A 6.0 Kg block is thrown up

    asked by susane on November 6, 2006
  40. Physics

    a particle (C) of mass m = 0.2 kg can slide without friction on an inclined plane making an angle alfa (a) = 30 degrees with respect to the horizontal (aka ground) . (C) is launched at at an instant to=0 along a line Ox of greatest slope with an initial

    asked by PlzhelptheyllkillmeifIgetthiswrong on September 24, 2011
  41. 5th grade

    The gravitational force on the moon is one -sixth of what it is on Earth. This means that on the Moon you would weigh one-sixth of what you weigh on Earth. How much would you weigh on the moon.

    asked by NayQuan on September 2, 2010
  42. Physics

    This is my homework problem: "The pilot of a plane is flying at 450 mi/hr W 20.0 degrees S relative to the earth. She sees another plane flying at 350 mi/hr N 40.0 degrees W relative to her plane. What was the magnitude and direction of the plane she saw

    asked by Tii on October 7, 2010
  43. Physics

    If the moon were twice as massive, would the attractive force of Earth on the moon be twice as large? Yes No What about the attractive force of the moon on Earth? Yes No

    asked by Sharvani on October 25, 2012
  44. math

    I have a math problem. A Mars year is 1.88 Earth years. If you are 13 years old in Earth years, about how would you be in Mars in Mars years? Thanks

    asked by jared on January 27, 2010
  45. chemistry

    The total surface area of earth is about 1.97*10^8 square miles. the surface area of land on earth is about 5.73*10^7 square miles. find the ratio of the surface area of land to the entire planet.?

    asked by ashley on September 15, 2009
  46. math/science

    The total surface area of Earth is about 1.97 × 10^8 square miles. The surface area of land on Earth is about 5.73 × 10^7 square miles. Find the ratio of surface area of land to that of the entire planet.

    asked by . on September 13, 2015
  47. Algebra 1 Scientific Notation

    Isaac newtons theory of universal gravitation states that the equation F=G m^1m^2/r^2 can be used to calculate the amount of gravitational forces in newtons between 2 point masses (m^1) and (m^2) separated by a distance (r). G is a constant equal to

    asked by Austin on September 27, 2011
  48. Physics

    The mass of a star in a galaxy far, far away, is 2.13 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 7.87 × 108 km. Treating this planet and star as particles, with each

    asked by Briana on January 17, 2016
  49. Ap physics 1

    The mass of a star in a galaxy far, far away, is 3.12 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 2.46 × 108 km. Treating this planet and star as particles,with each

    asked by Jonathan on December 12, 2015
  50. Environmental Science

    29. A common feature of thermal pollution and artificial eutrophication is that they both a. have sources that are difficult to identify and control b. cause large mats of algae to bloom in fresh water c. are a result of power plants and other industrial

    asked by y912f on January 27, 2010
  51. English

    I forgot to include the following sentences. I hope you can have a look at them, too. 1)The British upper class still thought of itself as the centre of the civilized world. World War I put an abrupt end to all this. 2) In June 1914 the heir to the

    asked by Mike on March 21, 2011
  52. analytical question

    One application of emission in remote sensing is in the detection of forest fires. The Landsat satellite has a sensor that detects active fires by examining their emission in the wavelength region of 1.55 μm to 1.75 μm. a. What type of light is being

    asked by panchi on June 25, 2014
  53. science

    I am studying science at GCSE. I a working through a revision book and have come across a question which i am unsure of the answer. The question is, "state the number of different elements present in C6H5CO2Na." The answer i have is 14 but still i am

    asked by sam on March 19, 2007
  54. physical science

    A kg ball of lead rests next to a 10 kg rock. which statement below is true:a:the lead ball and rock have the same amount of inertia,b:if the lead ball and the rock fell from the same height in a vacuum, the rock would hit the ground first because it is

    asked by ellen on January 29, 2011
  55. physics

    On average, the electron and proton in a hydrogen atom are separated by a distance of (5.3 x 10 -11 m), assuming the orbit of the electron to be circular, (a) what is the electric force on the electron? and (b) WHat is the electrons orbital speed? and (c)

    asked by kyle on March 26, 2009
  56. physics

    A one tonne moon obiter is to approach the moon and orbit through 270 degrees at an altitude of 100km. During this period its rockets are to be turned off. What is the required velocity of the obiter at the entry point to prevent the vehicle from crashing

    asked by sandhya on August 12, 2010
  57. Physics

    An aluminum wire with mass/unit length of p = 5*10^-4 kg/m lies on the ground, running east-west. The wire feels the earth's magnetic field, which has magnitude B = 5*10^-5 T. Assume the wire is in Columbia, where the Earth's magnetic field runs due north,

    asked by Huy Nguyen on November 29, 2012
  58. physics

    an atom is placed in a uniform magnetic induction B. such that its plane normal to the electron orbit makes an angle of 30 degrees with the magnetic induction the torque acting on the orbiting electron?

    asked by manu on June 24, 2016
  59. Astrophysics

    The Earth formed at a redshift of z∼0.53. That means that when our world was young, the universe was quite a bit smaller than it is today. The nearest galaxies to our own are around 10 kpc (kilo-parsecs) in size, lie at a distance of around 1 Mpc from us

    asked by Anonymous on April 12, 2014
  60. english fixed-3

    here's what i did for number 4. The world is deserting because we are taking water for granted. If people continue to waste water, the earth’s structure will change and it will be the main cause of earthquake and potentially a tsunami. and for number 5.

    asked by ESLstudent on February 28, 2012
  61. Language

    People have been making maps for hundreds of years. Christopher Columbus used maps when he sailed to the "New World." At that time, most people thought Earth was flat, and all of the maps they used were flat, too. Of course, Columbus's maps were not

    asked by Estephania on January 13, 2016
  62. Earth

    1. If the Earth were the size of B-B (with a radius of about 0.2 centimete), how big would the Sun be? How big would the Milky Way be? 2. Imagine building a model of the Solar System on your campus. Work out the diameter and spacings of the planets in

    asked by Sunny on April 3, 2007
  63. Calc

    Recent studies indicate that the average surface temp. of the earth has been rising steadily. Some scientists have modeled the temp. by the linear function T= 0.02t + 8.50, where T is temp. in degrees Celsius and t represents years since 1900. What do the

    asked by Chelsea on September 20, 2010
  64. physics

    It has been suggested, and not facetiously, that life might have originated on Mars and been carried to Earth when a meteor hit Mars and blasted pieces of rock (perhaps containing primitive life) free of the surface. Astronomers know that many Martian

    asked by Anonymous on September 14, 2014
  65. Science

    Does the Earth and moon have large molten core or only 1 of them does? I think the Earth only has large molten core

    asked by Jaycee on November 29, 2011
  66. Geology

    Can someone please look this over and let me know if I described the Plate Tectonic Theory? Thanks. Write a 200-300-word summary about two historical figures and the process of mantle convection and plate movement. Two historical figures that contributed

    asked by A.W. on April 8, 2009
  67. PHYSICS

    Compare the electric force holding the electron in orbit (r=0.53×10−10m) around the proton nucleus of the hydrogen atom, with the gravitational force between the same electron and proton. What is the ratio of these two forces?

    asked by ARION on March 31, 2017
  68. geology

    How old are the oldest meteorites yet studied and what is the minimum age of Earth since Earth is at least as old as the meteorites. We know the oldest meteorites contain equal amounts of uranium 238 and lead 206. Uranium 238 has a half life of 4.5 billion

    asked by m on November 21, 2010
  69. 7th grade Science help

    1. _______ is energy that flows from an object with a higher temperature to an object with a lower temperature. (1 point) Heat Radiation Potential Chemical 2. The transfer of energy that occurs when molecules bump into one another is called _____. (1

    asked by Delilah on September 26, 2012
  70. chemistry

    You want to heat a satellite by radioactive decay of 238 plutonium. Assume you need heating of 200 Watts (J/s), how many Becquerel you need in your plutonium sample, if the decay energy of 238 plutonium is 5.593 MeV? (1 joule = 6.24 x 10^18 eV ) When will

    asked by Anonymous on November 19, 2010
  71. Chemistry

    A NASA satellite showed that in 2003 the ozone hole was much larger than it was in 2002. The 2003 hole measured 1.04 x in diameter, while the diameter of the 2002 hole was 6.9 x Calculate the difference in size between the two holes in square meters

    asked by Norma on July 20, 2011
  72. geography

    Match each item on the left with an item on the right. Question 1 options: philosophy calling for greater economic equality in society creator of the Kremlin in Moscow country once controlled by the Soviet Union term that means "self-rule" organized

    asked by Kiri on July 9, 2012
  73. astronomy

    Observations with the Hubble Space Telescope revealed a planet about 16 AU from a star whose mass is the same as our Sun’s mass. How long does it take the planet to orbit the star?

    asked by Anonymous on March 23, 2009
  74. astronomy

    Calculate the tidal force experienced by Io. How does it compare to the tidal force experienced by the Moon due to the Earth? What would the Earth-Moon distance (i.e., distance between their centres) need to be in order for the Moon to experience similar

    asked by roach on November 20, 2011
  75. physics

    Calculate the tidal force experienced by Io. How does it compare to the tidal force experienced by the Moon due to the Earth? What would the Earth-Moon distance (i.e., distance between their centres) need to be in order for the Moon to experience similar

    asked by roach on November 20, 2011
  76. Math (Physics)

    Problem: An excited hydrogen atom could, in principle, have a radius of 2.50 mm . ________ Part A: What would be the value of n for a Bohr orbit of this size? Answer--> n= 6.87×103 _______ Part B What would its energy be? Answer--> E=_______eV [Note: I

    asked by Dom on April 25, 2017
  77. physics

    The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force. Suppose a charged particle traveling with a speed of 9.80 x 10^6 m/s encounters the earth's

    asked by aml on February 9, 2011
  78. Astronomy

    Suppose that, in the future, observations with some new telescope reveal a planet about 16 AU from a star whose mass is the same as our sun's mass. How long does it take the planet to orbit the star? Use Keplers law. You know at 1AU the period is 365

    asked by Roger on April 4, 2007
  79. Math

    A year on Mars is 686 Earth Days. (1) Which is longer, a year on Mars or a year on Earth? (2)By how many weeks is it longer? Submit two answers. Please explain how you got the answers. My 1st answer was Mars the 2nd answer I 82 1/2 weeks. Please help

    asked by Nakia on September 5, 2012
  80. global

    why could it be said that the historic period is only a minute in comparison ti the 24 hours of the day? The historic period began about 5,000 years ago when writing was first developed in Mesopotamia (now Iraq). Modern man has existed for at least 100,000

    asked by Victoria on July 23, 2007
  81. Physics

    The weight of an astronaut plus his space suit on the Moon is only 270 N. A. How much do they weigh on Earth, in Newtons, assuming the acceleration due to gravity on the moon is 1.67m/s^2= 1584is this right? B. What is the mass of the astronaut and his

    asked by Flo on September 2, 2015
  82. Physics

    (a) What is the shape of the radio waves from a satellite when they reach a dish antenna on the roof of a building? Explain. (b) Explain what happens to these waves when they reach the dish.

    asked by Raju Singh on December 2, 2012
  83. Physics

    (a) What is the shape of the radio waves from a satellite when they reach a dish antenna on the roof of a building? Explain. (b) Explain what happens to these waves when they reach the dish.

    asked by Raju Singh on November 30, 2012
  84. 11th grade Biology

    I have three questions that I can't find anywhere. 19) Organisms that are at the greatest risk when the dynamic equilibrium is upset would be the: A. Organisms at the top of the evolutionary tree B. Generalists C. Specialists D. Invertebrates E. All of the

    asked by Alicia on September 18, 2009
  85. KUSSSESSS

    Consider a wire of length L = 0.30 m that runs north-south on a horizontal surface. There is a current of I = 0.50 A flowing north in the wire. (The rest of the circuit, which actually delivers this current, is not shown.) The Earth's magnetic field at

    asked by anip on February 3, 2011
  86. Physics

    What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3)

    asked by Sue on October 12, 2016
  87. physics

    What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3)

    asked by Betty on October 10, 2016
  88. physics

    What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3)

    asked by Jessica on October 9, 2016
  89. physics

    A 3Kg projectile is fired straight upward from earth's surface with a speed that is one-fourth the escape speed. Neglecting air resistance. a) What is the Kinetic energy of this projectile when it is launched? b) what is the gravitational potential energy

    asked by rick on February 15, 2011
  90. Physics

    The sun is a satellite of Milky Way's galactic central cluster. The sun revolves around this center with a radius of 2.28x10^20 m. and with a period of 2.52x10^8 years. If the universe is 16 billion years old. a) How many times has the galaxy rotated and

    asked by Anonymous on April 27, 2018
  91. Physics

    The sun is a satellite of Milky Way's galactic central cluster. The sun revolves around this center with a radius of 2.28x10^20 m. and with a period of 2.52x10^8 years. If the universe is 16 billion years old. a) How many times has the galaxy rotated and

    asked by Anonymous on April 27, 2018
  92. Physics

    A man of mass 75.5 kg walks down the aisle of an airplane at a speed of 1.50 m/s in the forward direction while the plane moves at a speed of 305 m/s relative to the earth. (a) Find the man's kinetic energy relative to the plane. (b) Find the man's kinetic

    asked by Kellie on October 10, 2011
  93. NCSU

    A man of mass 83.5 kg walks down the aisle of an airplane at a speed of 1.60 m/s in the forward direction while the plane moves at a speed of 295 m/s relative to the earth. (a) Find the man's kinetic energy relative to the plane. (b) Find the man's kinetic

    asked by Amber on March 24, 2012
  94. math

    3. The height H of an object t seconds after it is propelled upward with an initial velocity v is represented by , where g is the gravitational pull and h is the initial height. The gravitational pull of the moon is 1.6 meters per second squared. The

    asked by Anonymous on July 25, 2011
  95. physics

    A man of mass 78.5 kg walks down the aisle of an airplane at a speed of 1.40 m/s in the forward direction while the plane moves at a speed of 320 m/s relative to the earth. (a) Find the man's kinetic energy relative to the plane. (b) Find the man's kinetic

    asked by Help on April 4, 2013
  96. Physics

    Obi-Wan lands his spacecraft on an unknown planet. Visibility is poor, so he isn't able to exactly determine on which planet he has landed. He finds someone on a local communications channel and asks for directions to Earth. "You are already on Earth," is

    asked by Megan on September 22, 2014
  97. Physics/Astronomy

    A pulsar is a stellar object that emits light in short bursts. Suppose a pulsar with a speed of 0.975c approaches Earth, and a rocket with a speed of 0.999c heads toward the pulsar (both speeds measured in Earth’s frame of reference). If the pulsar emits

    asked by Kim on April 25, 2013
  98. Science

    In __, the amplitude of the carrier wave is changed to transmit information; the frequency is not changed. In __, the frequency of the carrier wave is changed __ phones and __ phones use radio waves to transmit signals. __ use electromagnetic signals from

    asked by Michael Jones on January 3, 2010
  99. physics

    In Bohr's model of the hydrogen atom, the radius of an orbit a. is proportional to n2. b. is smallest for the highest energy state. c. increases when a photon of light is emitted from an excited atom. d. can have any value that is larger than the

    asked by jeff on August 15, 2009
  100. physics

    1. The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground? (Note: this question refers to Newton’s equation

    asked by Anonymous on August 21, 2011