1. physics

    Help me solve this physics homework: in sense we all have kinetic energy,even when we are standing still.the earth with a radius of 6.37*10power6 m,rotates about its axis once a day.ignoring the earths rotation about the sun,what is the K.E of a 50Kg man

    asked by ruru mq on March 1, 2013
  2. science

    The earth's magnetic shield has? a) appeared only recently b)disappeared for short periods of time c)caused the earth's land masses to drift apart d)little effect on life this planet e)existed since the planet cooled Just need to know if my answer or right

    asked by ant on August 18, 2010
  3. science

    Explain why earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this period not considered a part of Earth's

    asked by FluttershyK22 on March 24, 2016
  4. PHYSICS

    Four billion years ago the Sun’s radiative output was 30% less than it is today. (i) If we assume the radius of the sun is the same, and that the Earth’s atmosphere was the same as it is now (that is, the atmosphere absorbs 10% of the incoming solar

    asked by Sunshin3 on January 24, 2010
  5. PHYSICS-radiation

    Four billion years ago the Sun’s radiative output was 30% less than it is today. (i) If we assume the radius of the sun is the same, and that the Earth’s atmosphere was the same as it is now (that is, the atmosphere absorbs 10% of the incoming solar

    asked by RANI on January 25, 2010
  6. chemistry

    The "Chemistry in Focus" segment A Magnetic Moment discusses the ability to levitate a frog in a magnetic field because electrons, when sensing a strong magnetic field, respond by opposing it. This is called diamagnetism. Atoms that are diamagnetic have

    asked by RILEY on October 12, 2010
  7. physics

    the moon is 4*8 m away from the earth Aradar signal transmitted from the earth .How much will it take to reach the moon?

    asked by anand on August 30, 2011
  8. physics

    A pendulum has a period of 0.57 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?

    asked by Anonymous on April 26, 2010
  9. scince

    Mars=750N the value of g is 38% of that of earth what is the mass of the men on the earth and his weight of mars

    asked by Rahul gupta on September 18, 2016
  10. Physics

    A pendulum has a period of 4.28 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?

    asked by Andrew on March 11, 2013
  11. Physics

    A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.31 that on Earth?

    asked by Jacob on January 9, 2012
  12. Science HELP PLS

    how are earth and venus similar? how is venus different from earth? provide two similarities and two differences

    asked by Zach on February 26, 2016
  13. Physics 11

    How much would a 80kg astronaut weigh on Earth? How much would they weigh 500 km above the surface of the Earth? Thank you!

    asked by Cole on November 1, 2010
  14. physics

    A pendulum has a period of 0.90 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.29 that on Earth?

    asked by ce on March 24, 2016
  15. Science

    How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences.

    asked by Justin on March 16, 2017
  16. Math

    An ant weighs about 2 x 10^-5 lb. There are about10^15 ants on earth. How many pounds of an ants are on earth?

    asked by Anonymous on April 5, 2011
  17. Science

    Suppose the moon were closer to Earth. How would the force of gravity between Earth and the moon be different?

    asked by Cassie on February 26, 2012
  18. physics

    A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.51 that on Earth?

    asked by Sam on March 8, 2012
  19. English

    a living thing which grows in earth: plant (What does "in earth" mean? Does it mean under the ground or on the ground?)

    asked by rfvv on December 7, 2010
  20. phy

    A pendulum has a period of 0.75 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.41 that on Earth?

    asked by ami on November 11, 2010
  21. Math

    faizel wants to travel from his house to the hardware store that is six blocks east and five blocks south of his home. If he walks east and south, how many different different routes can he follow from his house to the store? Can somebody help me setup

    asked by Jay on April 28, 2011
  22. History

    Which of these describes the location of the Gulf of Mexico? South of West Florida East of East Florida West of New Orleans South of Great Britain I believe the answer is B And please give a correct answer cause I don't want to get it wrong.

    asked by Marc-Anthony on January 5, 2016
  23. Geography

    23. Most of the people in South Asia make their living from a. mining b. herding c. farming d. weaving C 25. The two religions with the most followers in South Asia are a. Hinduism and Christianity b. Christianity and Sikhism c. Hinduism and Islam d.

    asked by mysterychicken on October 20, 2009
  24. Science-Damon

    Describe how the movement of Earth is responsible for day and night. The movement of earth is responsible for day and night because as it rotates counterclockwise we tend to have this result. The part of earth that faces the sun experiences daylight, and

    asked by Sara on February 7, 2010
  25. Structure of the Earth

    Explain Earth's layers by comparing Earth to a familiar object such as an avocado. How are the layers similar? How are they different? I don't really get this question...All I know is that they both have different layers consisting of different mix of

    asked by Anonymous on January 4, 2011
  26. Physics

    An Earth satellite moves in a circular orbit 765 km above the Earth's surface. The period of the motion is 99.9 min. (a) What is the speed of the satellite? ______ m/s (b) What is the magnitude of the centripetal acceleration of the satellite? ______m/s^2

    asked by Corey on October 12, 2015
  27. physics

    A Titan IV rocket has put your spacecraft in a circular orbit around Earth at an altitude of 230 km. Calculate the force due to gravitational attraction between the Earth and the spacecraft in N if the mass of the spacecraft is 2300 kg.

    asked by peter on October 25, 2014
  28. Astronomy

    A possible trajectory for sending a spacecraft to Mars is an elliptical orbit with Earth at its perihelion and Mars at its aphelion. The craft would be launched out of low-Earth orbit by a quick burst of rockets into solar orbit, and would then "coast''

    asked by keitanako on December 9, 2013
  29. astronomy

    A possible trajectory for sending a spacecraft to Mars is an elliptical orbit with Earth at its perihelion and Mars at its aphelion. The craft would be launched out of low-Earth orbit by a quick burst of rockets into solar orbit, and would then "coast''

    asked by johan on December 4, 2015
  30. Social Studies

    Thank you very much for your help, i am in a rush but i will be patient. * marks my answer. 1. What was the effect of World War I on South Carolina? A. The state economy shrunk significantly. B. Citizens used more resources, such as meat and fuel, than

    asked by basketball&batman on April 15, 2015
  31. Geography

    I have to use the hints given to find out what place is being talked about- 31. "We had our picnic near the capital of this new nation, which used to be the eastern part of Czechoslovakia." ...Slovakia? 32. "The person collecting these samples writes that

    asked by mysterychicken on October 13, 2009
  32. Physics

    Find the orbital speed of a satellite in a circular orbit 3.70×107 m above the surface of the Earth. v = 3030 m/s So I've been trying to solve this problem for some time now and haven't figured it out. What I did is find orbital radius, use that to find

    asked by Alvin on December 1, 2016
  33. English

    1. Plants grow in earth. 2. Plants grow on earth. 3. Plants grow in the earth. 4. Plants grow on the earth. (Which ones are correct? What does #1 mean? Does #i mean that plants grows under the earth?)

    asked by rfvv on November 14, 2012
  34. Math

    A farmer wants to create a rectangular pen in order to raise chickens. Because of the location of the pen, the fence on the north and south sides of the rectangle will cost $5 per metre to construct whereas the fence on the east and west sides will cost

    asked by Emily J on March 16, 2016
  35. Physics

    a car travels 59.78 miles east in 89.67 minutes, then 89.67 miles north in 59.78 minutes, and then 29.89 miles at 59.78 degrees west of south in 149.45 minutes. whats the magnitude of the car's average velocity in miles per hour??? Please help!!!!!! P.S.

    asked by Autumn on September 8, 2009
  36. Quantitative Reasoning (math)

    Your weight on the moon is relative to your weight on Earth. Neil Armstrong weighed 360 lbs. in his moon gear while on Earth, but on the moon he only weighed 60 lbs. What is the ratio of the Earth weight to the moon weight? How much would you weigh

    asked by Heather on September 11, 2014
  37. Honors physics

    A person walks 24.0◦ north of east for 3.24 km. Another person walks due north and due east to arrive at the same location. How large is the east component of this second path? How large is the north component of this second path? Answer in units of km.

    asked by Lal on September 28, 2015
  38. Trig

    Two pilots take off from the same airport. Mason heads due south. Nancy heads 23 west of south. After 400 land miles, how far is Nancy from Mason’s route? I think 156.29, but I'm not sure because the question comes in a lesson on sum and difference

    asked by Anonymous on May 10, 2015
  39. english

    As it sailed south, Lord Nelson's great ship, Victory, met the Spanish fleet near Trafalgar. 12. The simple subject of the sentence is A. Lord Nelson. B. ship. C. fleet. D. south. I think best answer is B?

    asked by alex on May 15, 2013
  40. Physics

    You’re riding your bicycle first west a distance of 7.7 km, then south a distance of 14.1 km. (a) In what direction does your average velocity vector point, in degrees south of west? (b) If the total trip took 18.3 minutes, what is the magnitude of this

    asked by Bira on April 11, 2016
  41. physics

    The scalar product of vectors and is +53.0 . Vector has magnitude 6.00 and direction 28.0 west of south. If vector has direction 39.0 south of east, what is the magnitude of ?

    asked by muhammad on March 7, 2012
  42. College Algebra math

    A plane flies due east for 35 miles and then due south until it is 37 miles from its starting point. How far south did the plane fly?

    asked by Kelly on May 23, 2016
  43. physics

    The pilot of an airplane wishes to fly due north, but there is a 71 km/h wind blowing toward the east. (a) In what direction should the pilot head her plane if its speed relative to the air is 314 km/h? ° west of north Should the angle just be the

    asked by Debby on September 11, 2014
  44. Physics

    Two fire alarms are placed in a building, one 2.3 m north of the other. A person sitting at a desk which is 67.2 m east and 8.4 m north of the point mid-way between the alarms does not hear them when they sound. What is the lowest frequency that the alarms

    asked by Kilin on October 8, 2016
  45. Physics

    Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.0 kg and an initial velocity of VoA = 8.15 m/s, due east. Object B,

    asked by Jennifer on March 6, 2015
  46. physics

    show that the weight of an object on moon is one-sixth of its weight on the earth given mass of earth=5.98*10power24kg, radius of earth=6.37*10power6m. given mass of moon=7.36*10power22kg, radius of moon=1.74*10power6m.

    asked by fatin on June 28, 2015
  47. Physics

    Assuming the earth to be a uniform sphere of radius 6400 km and density 5.5g/c.c. find the value of g on the surface where G=6.67×10

    asked by Muskaan on March 15, 2018
  48. 5th grade math

    Given 257 sec, 15,000 feet per second Find the acceleration due to earth's gravity.

    asked by confused dad on November 15, 2012
  49. Regents

    Where is the site of the Regents countdown for Earth Science? It has the days, hours, minutes, etc. and I can't find it. Please help. Thank you.

    asked by Anonymous on May 10, 2008
  50. science

    find the theoreticval value of the period of a pendulum of length 0.9 meters located on the surface of the earth.

    asked by princess on February 26, 2013
  51. Physics

    Consider a spaceship located on the Earth-Moon center line (i.e. a line that intersects the centers of both bodies) such that, at that point, the tugs on the spaceship from each celestial body exactly cancel, leaving the craft literally weightless. Take

    asked by Lindsay on December 16, 2007
  52. Physics - HELP

    An airplane is heading due south at a speed of 515 km/h. A wind begins blowing from the southwest at a speed of 100 km/h (average). (Hint: First draw a diagram.) (a) What is the velocity (magnitude and direction) of the plane relative to the ground?

    asked by Anonymous on September 27, 2009
  53. physics

    An airplane is heading due south at a speed of 515 km/h. A wind begins blowing from the southwest at a speed of 100 km/h (average). (Hint: First draw a diagram.) (a) What is the velocity (magnitude and direction) of the plane relative to the ground?

    asked by DJ on September 27, 2009
  54. physics

    At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.1 m until, at t = 1.64 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find

    asked by Colin on January 29, 2014
  55. Physics

    At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.9 m until, at t = 1.56 s, it is traveling east. The car does not alter its speed during the turn. Find the car's speed. Find the

    asked by Max on February 7, 2010
  56. physics

    At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 9.3 m until, at t = 1.38 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find

    asked by candace on February 14, 2010
  57. math

    A motorcycle leaves Colorado Springs traveling north at an average speed of 47 miles per hour. One hour later, a car leaves Colorado Springs traveling south at an average speed of 54 miles per hour. How long after the motor cycle leaves will it take until

    asked by elaine on May 31, 2011
  58. physics

    At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 9.3 m until, at t = 1.38 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. ___ m/s (b)

    asked by Cindy on February 8, 2010
  59. physics

    i don't get this question: rubber rods and fur define negative charges. explain this statement. what is this question asking about??? can any plz tell me./?THX ALOT The charge left on the rubber when rubbed with fur, was defined originally as "negative".

    asked by koeit on May 6, 2007
  60. Science pplzzz!!

    Which of the following is true about rocks? Rocks are composed of only one mineral. Rocks do not contain any nonmineral matter. Coal is not considered a true rock. Most rocks are a mixture of minerals. 2. If granite undergoes high temperatures and high

    asked by Anonymous on October 6, 2014
  61. chemistry

    Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of four particles per second. How many years would it take to count 8.10 x 10^23 particles? Assume that there

    asked by Kory on February 11, 2014
  62. chemistry

    Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of two particles per second. How many years would it take to count 6.0 x 10^23 particles? Assume that there

    asked by Anonymous on November 17, 2010
  63. chemistry

    Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of four particles per second. How many years would it take to count 8.10 x 10^23 particles? Assume that there

    asked by Kory on February 11, 2014
  64. physics

    The mass of the Earth is 5.98 × 1024 kg. A 6.83 kg bowling ball initially at rest is dropped from a height of 2.12 m. The acceleration of gravity is 9.8 m/s^2. What is the speed of the Earth coming up to meet the ball just before the ball hits the ground?

    asked by Jazz on January 17, 2017
  65. chemistry

    Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of two particles per second. How many years would it take to count 6.0 x 10^23 particles? Assume that there

    asked by Anonymous on November 17, 2010
  66. History

    Which of the following best explains the Dred Scott case and how it affected the debate about slavery? Dred Scott was a slave owner who learned his slave was living as a free man in a Northern state. He argued that the slave should be returned to him to

    asked by Dylan on May 22, 2018
  67. geology

    1. What fraction of the Earth is made up of each of the major compositional layers: core, mantle, and crust? 2. What cities lie the same distance from our town as the boundaries of the following layers in the Earth lie from the solid surface? a. Base of

    asked by student01 on September 3, 2008
  68. Science

    Compare the nature greenhouse effect process with the human induced. 2. What are the greenhouse gases? Which one is the biggest concern? 3. What are scientists doing to collect data? 4. What role does the carbon cycle play in this problem? 5. What are the

    asked by A on January 10, 2013
  69. science

    1 evaluate the market failure in south Africa 2 base your argument on south african context and also outline its effects thereof 3 evaluate at least four types of market failure and also how the government should correct the market failure 4 use

    asked by unarine on May 15, 2016
  70. social studies

    What where the people in north africa like, what was their surroundings like Since this is not my area of expertise, I searched Google under the key words "North Africa people" to get these possible sources: http://www.africaguide.com/culture/index.htm

    asked by jasmine on January 26, 2007
  71. Social Studies

    Can you check my answers? My answers are marked with this: (*) 1. What was the effect of World War I on South Carolina? A. The state economy shrunk significantly. *** B. Citizens used more resources, such as meat and fuel, than before the war. C. Factory

    asked by Trey on April 2, 2015
  72. physics

    (1) A helium atom consists of two protons (charge +2e) and two electrons (charge -2e) that are an average of 4.3 x 10^-11 m apart. Find the electrical force between them. Find the gravitational force between them. What is the ratio of gravitational to

    asked by Fred on April 17, 2009
  73. English

    Can you please check if the following sentences are correct? Thank you. 1) The average amount of pocket money is £8. Boys spend it on sweets, fast food, CDs and computer games. 2)Jess comes from Colorado, a country in the south-west of the USA. 3)

    asked by Franco on November 11, 2010
  74. 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
  75. Science

    suppose a skydiver (mass = 75 kg) is falling toward the earth. when the skydiver is 100 m above the earth he is moving at 60 m/s. at this point calculate the skydiver's

    asked by Michelle on October 22, 2016
  76. Physics

    Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 24 kg object on the Earth? The acceleration of gravity is 10m/s2 .

    asked by Breanna on November 12, 2013
  77. Physics

    At 6400 km above the earth’s surface, an object weighing 71 N on the surface would weigh only 18 N. Acceleration due to gravity will be about ¼ that on the surface of the earth.

    asked by Joaquin on February 22, 2016
  78. science

    5. Suppose a skydiver (mass = 75 kg) is falling toward the Earth. When the skydiver is 100 m above the Earth he is moving at 60 m/s. At this point calculate the skydiver’s…….

    asked by jeremiah on November 16, 2016
  79. Social

    how does restoring voting to whites in the south help protect rights of freedmen in the 1870s? freedmen by the way were the slaves. thx for ur help :) It would have caused a great deal of anger if freedmen could vote, but whites couldn't vote. This was a

    asked by Jon on December 21, 2006
  80. Physics

    A drone capable of flying north at a speed of 4.0 m/s in still air is attempting to fly across a field 120 m wide. There is a wind blowing at 5.0 m/s [E]. a) Find the drone's velocity relative to the ground. b) Find the time it takes the drone to cross the

    asked by Taha on December 8, 2015
  81. alegebra

    A turtle starts moving north at 4 feet per minute from a point P. Five minutes later, a snail starts moving south at 2 feet per minute from a point 50 feet due east of P. What is the distance (in feet) between the two animals five minutes after the snail

    asked by Elaine on September 23, 2014
  82. math

    A turtle starts moving north at 4 feet per minute from a point P. Five minutes later, a snail starts moving south at 2 feet per minute from a point 50 feet due east of P. What is the distance (in feet) between the two animals five minutes after the snail

    asked by Elaine on September 23, 2014
  83. science

    how is the air we breath today different from 3.6 billion years ago? http://en.wikipedia.org/wiki/Earth's_atmosphere#Evolution_of_the_Earth.27s_atmosphere http://eesc.columbia.edu/courses/ees/climate/lectures/earth.html

    asked by chris on March 14, 2007
  84. Physics

    1. If a car's mass is 439 kg, what is the weight on earth? A. 4390 N B. 4350 N C. 4300 N D. 4360 N 2. If a person weighs 717 N on earth and 5320 N on the surface of a nearby planet, what is the acceleration due to gravity on that planet? A. 83.6 m/s^2 B.

    asked by Amber on October 3, 2018
  85. physics

    Compute the orbital radius of an earth satellite that has an equatorial orbit and always remains above a fixed point P on the earth's surface. Communication satellites have such "geosynchronous" orbits (see figure). These satellites are used to relay radio

    asked by kellie on October 23, 2011
  86. Science

    A hurricane becomes more powerful be evaporating water from? lakes mountains oceans*** rivers 1. Over time, scientists have changed their model of our solar system. It has transitioned from A) a sun-centered to an moon-centered model. B) a sun-centered to

    asked by Haley on May 16, 2017
  87. Algebra Word Problem

    During summer vacation, c children went to different destinations with their parents. 36% of the children went to Europe and 24 children to Asia. The rest of the children went to South America. How many children went to South America?

    asked by Bobby on April 19, 2017
  88. computers? I think just a question.

    what are some process used in different organizations to download and imput paper information into computerized systems so other can analyze? would this be like excel programs charts graphs etc.? 1. Manual retyping the paper information to a text file 2.

    asked by april on July 4, 2007
  89. Science

    london england is approximately 51° north latitude 0° longitude. binghamton new york is about 42° north latitude 76° west longitude why does binghamton have colder winters?

    asked by Daniela on March 24, 2015
  90. Phys.

    A 6 mC charge experiences a force of 6 N directed north. What is the electric field (magnitude and direction) at the location of the charge? Would the direction still be north? And the magnitude 1000?

    asked by Alex B. on May 4, 2012
  91. Pre calc

    A boat is going 30 mph. It's direction is 100 degrees east of north. The water current is 15 mph and has a direction of 22 degrees east of north. Find the magnitude, and direction of boat.( with water current)

    asked by Will on January 20, 2015
  92. SCIENCE

    How would you find latitude and longitude without using a globe or the internet? Please help If you are plotting long distances are varying courses, the best you could do is plot these on a Equidistant Projection, and the usual of these is the Miller

    asked by Suzanne on October 8, 2006
  93. physics

    need help with this physics questions a jogger runs with a velocity of 6km/h 25 degrees north west for 35 minutes and then changes direction , jogging for 20 minutes at 4.5km/h 65 degrees east of north. using a vector diagram determine the joggers total

    asked by jake on March 2, 2010
  94. physics

    An earth satellite moves in a circular orbit with an orbital speed of 6200m/s. a) find the time of one revolution. b) find the radial acceleration of the satellite in its orbit.

    asked by colleen on August 22, 2009
  95. History

    Can someone please check these? I would greatly appreciate it. Thanks! 1. What was the purpose of the Freedmen's Bureau? a. to free the slaves b. to feed, clothe, and educate former slaves*** c. to move former slaves to the Northern states d. to ensure

    asked by Blair on February 18, 2016
  96. Chem- bobpursley

    What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p chem - bobpursley, Tuesday, September 21, 2010 at 6:48pm That is what I

    asked by Sara on September 22, 2010
  97. Astronomy

    Choose one answer for each question How old is the universe? 6,000 years old 380,000 years old 13.8 billion years old 13.8 million years old A parsec is: Longer than a light year The distance between the Earth and the Sun Approximately 3x10^24 cm None of

    asked by qwerty on April 29, 2014
  98. Polarity and electronegativity (science)

    Describe the concept of polarity. How is polrity related to electronegativity? ~Well I think that polarity is how I remember it.."pull" basically due to the tendency for electronegative atoms in a molecule to attract the other electrons in the other atoms

    asked by ~christina~ on October 11, 2007
  99. 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
  100. Science

    Describe how the movement of Earth is responsible for day and night. The movement of earth is responsible for day and night because as it rotates counterclockwise we tend to have this result. The part of earth that faces the sun experiences daylight, and

    asked by Sara on February 6, 2010