1. 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?
  2. 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?
  3. 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?
  4. Science

    How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences.
  5. 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?
  6. 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!
  7. 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?
  8. English

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

    sam weighs 720N on the earth and 120N on the moon.what does this tell you about the value of gravity on the moon?
  10. earth

    A man with a weight of 1000 newtons on earth visits each planet what is his weight on each?
  11. 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?
  12. 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
  13. Geography

    I need help with this: "This is a nation in South Asia. One of South Asia's three major rivers is in this country. The country has two climate regions, arid and semi-arid and the dominant religion in this country is Islam." Which country could it be?
  14. Third Side, Reply to Jen

    Hi Jen, I've seen the drawing. My site is down at the moment. Draw a line from Venus (either of the two positions) to the line Earth-Sun at right angles. Let's call the distance Earth Venus d. Then you have a right angle triangle with a hypotenuse d, the
  15. 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)
  16. Physics for life scince

    The population of Singapore is 4987600 people. The territory of Singapore is 710.2 km^2. the population of South Africa is 2171000people, while its territtory is 824292. Estimate the population densities of Singapore and South Africa.
  17. Astronomy

    In the laboratory, an atom emits a spectral line at a wavelength of 400 nanometers. In the spectrum of a star, the same spectral line is found to have a wavelength of 410 nanometers. What can be said about the star? a. It is hotter than the Sun. b. It is
  18. 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
  19. 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
  20. 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
  21. science

    Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth
  22. science

    Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth
  23. Science-Solar Radiation Receipt

    Why would the seasonal range (summer-Winter) in solar receipt be greater at 61 degrees North than at 40 degrees North?
  24. physics

    A cricket ball travelling north at 100km/h is deflected so that it travels north-east at 100km/h. What is the change in velocity of the cricket ball?
  25. physics

    A cricket ball travelling north at 100km/h is deflected so that it travels north-east at 100km/h. What is the change in velocity of the cricket ball?
  26. finance

    hey i cant figure this out can someone please help me Gatorade/Tropicana North America, a subsidiary of PepsiCo, produces fruit juices and other flavored beverages. Based on data from 1999 to 2001, the net sales (revenue) of Gatorade/Tropicana North
  27. physics

    Two satellites are orbiting the Earth in stable circular orbits. Satellite A has a mass m and is located at a distance 2r from the center of the Earth. Satellite B has a mass 2m and is located at a distance r from the center of the Earth. Which one of the
  28. 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
  29. 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
  30. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? I think the answer is B but not sure. a) That there is no reaction force-the net
  31. 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
  32. physics

    find the moment of inertia of the earth. Radius is 6,000 km and mass is 6 x 10^24 kg
  33. Physics

    How do I find the recoil velocity of the earth immediately after the popper popped?
  34. Science

    Help find the mystery phrase. We are studying the Earth and were not given anything except letters. They are: RORPSPNGLOADEEASI. Please help!!!
  35. Earth Science

    need to find the mystery phrase made from the following letters DNALFOSSERGORPEGA
  36. science

    churvas mass is 66kg. find his weight on earth and on the moon.
  37. science

    churvas mass is 66kg. find his weight on earth and on the moon.
  38. Science

    where can i find a good site that will show me the change's of the earth's atmosphere?
  39. Science

    Find your mass if a scale on Earth reads 650N when you stand on it.
  40. physics

    need the formula to find jupiters orbital period in earth years
  41. physics

    Find the density of the earth if its mass is 6×10^3kg and radius is 6.4×10^3km
  42. 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.
  43. 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?
  44. 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?
  45. Physics

    Neglect the gravity of the Moon, neglect atmospheric friction, and neglect the rotational velocity of the Earth in the following problem. A long time ago, Jules Verne, in his book From Earth to the Moon (1865), suggested sending an expedition to the Moon
  46. reading

    Examine the evidence of the Earth's shape. The sharp horizon at first suggests a flat Earth with an edge. But as you walk toward the horizon, the "edge" recedes ahead of you, implying that the Earth's surface is curved. Look also at a ship sailing out to
  47. physics

    Evidence suggests that there are trillions of dollars' worth of minerals and metals buried in Near Earth Asteroids (the ones that come close to the Earth, not the ones in the asteroid belt between Mars and Jupiter). Many scientists think an asteroid mining
  48. 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
  49. Physics

    An object of mass 3.5x1023kg circles the earth and is attracted to it with a force whose magnitude is given be GMeM/r^2. If the period of rotation is 22 days, what is the distance from the earth to the object? Here G=6.67x10-11 Nm2/kg2, Me=6x1024 kg.
  50. Science

    A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth
  51. AP Physics (circular motion)

    The moon revolves about the Earth in a trajectory that is very nearly a circle of radius r = 384,401 km, and requires 27.3 days (23.4 x 10^5 seconds) to make a complete revolution. What is the acceleration of the moon toward the Earth?
  52. geology

    What is the minimum age of Earth. We are given a hint of: If the age of Earth were equal to one calendar year, the 1492 arrival of Christopher Columbus in America would have occurred at five seconds to midnight Dec. 31. That confuses me even more.
  53. college physics

    A new planet has been discovered that has a mass one-tenth that of Earth and a radius that is one-sixth that of Earth. Determine the free fall acceleration on the surface of this planet. Express your answer in the appropriate mks units.
  54. pre calc

    an earth satellite in circular orbit 1250 kilometers high makes one complete revolution evry 90 min. What is it linear speed? use 6400 kilometers for the radius of the earth.
  55. Maths

    If a plane travels halfway round the world at an altitude of 11300m, what extra distance in km, will it fly compared with the distance measured at the surface of the Earth? The radius of the earth is approximately 6400km
  56. physics

    How is the angle of inclination of the sun measured on the vernal or autumnal equinox at noon related to the latitude of our location here on earth. Use a picture that includes the earth and the sun in your explanation. I'm completly lost
  57. 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
  58. 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)
  59. 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
  60. chemistry

    Which statement correctly describes an atom of the element helium? A. An atom of helium has its valence electrons in it's first energy level. B. An atom of helium most similarly behaves like an atom of hydrogen since it is in the same period. C. An atom of
  61. maths

    from a point R,300M north of P, a man walks eastwards to a place Q which is 600m from P. find the bearing of P from Q correct to the nearest degree
  62. physics

    A 300 kg sailboat accelerates at 0.5 m/s^2 at an angle of 25degrees North of East. Find the magnitude and direction of the force responsible for this accelereation.
  63. Physics

    A train moving with constant speed of 54kmph moves eastwards for 30min then north for 40min find avg velocity
  64. grade seven

    Does anyone know where I can find the relative location of Aruba. Does 12 degrees North latitude of the equator and 18 miles off the coast of Venezuela sound correct.
  65. 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".
  66. 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
  67. S.S

    5. The Underground Railroad used escape routes that went throughout the South. Based on that fact, which of the following conclusions could be made? (1 point) A. The Southern states were leaning toward emancipation of the slaves. B. Slaves were hopeful to
  68. science

    Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth
  69. 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
  70. physics problem!!

    If the water molecules in 5.70 g of water (H2O) were distributed uniformly over the surface of the Earth, how many such molecules would there be on 1.40 cm2 of the Earth's surface? -Molar mass Hydrogen gas(H2)=2.02 g/mol -Molar mass Oxygen gas (O2) = 32.0
  71. Physics

    The mass of Venus is 0.8140 times that of earth, and its radius is 0.950 times that of earth. Calculate the acceleration of gravity at the surface of Venus. Express your answer in g's (i.e. as a ratio to our acceleration of gravity). 9.01×10-1 is the
  72. 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
  73. science

    Discuss how comets might have a role to play in life evolving on an earth-like extrasolar planet in a distant solar system. can some one please help me out here. If life came to Earth via a comet, wouldn't it make sense to predict that some comet could
  74. Physics

    .) Beth launches a rocket out in the courtyard. It stays in the air for 7.25 seconds before coming back down. a.) How high did it get? b.) With what velocity did it hit the ground upon returning to Earth? c.) What is its rate of acceleration as it slows
  75. Physics

    Taking the age of Earth to be about 4 ✕ 109 years and assuming its orbital radius of 1.5 ✕ 1011 m has not changed and is circular, calculate the approximate total distance Earth has traveled since its birth (in a frame of reference stationary with
  76. physics

    In 5.20 h, a balloon drifts 6.5 km north, 2.00 km east, and 2.76 km in upward elevation from its release point on the ground. (a) Find the magnitude of its average velocity. . km/h (b) Find the angle its average velocity makes with the horizontal. . °
  77. physics

    A student wanted to drive from Austin to san Antonio ,80 mi south of Austin on highway I35. Unfortunately he entered in the wrong direction and drove to waco-100 miles north of Austin –before he noticed his error. In waco ,he turned around,drove back to
  78. physics hey damon one more please! =]

    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
  79. trig

    A ship sails 40 miles SOUTH and 15 miles EAST. Find the bearing from where it began? HELP.
  80. Math

    A walks 2Km south to B, she the walks 3km west to C. Find the distance and bearing from C and A
  81. chemistry/physics

    i need to determine how many protons, neutrons, and electrons are in these but they arent just straight elements tehy are singly ionized hydrogen (positive) doubly ionized hydrogen(positive) and singly ionized oxygen (negative) these are my answers,
  82. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the
  83. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the
  84. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the
  85. social studies

    what are the advances of early culture groups in north america This question is FAR too broad. There were many, many groups of people (and therefore civilizations) that developed in what we now call North America. You'll need to decide on one or two groups
  86. 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
  87. 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
  88. U.S.History

    for my question: which were advantags the South had in the Civil War Ms Sue said its either a. larger army or d. more experienced generals. this is what my book says: Seven of the nation's eight military colleges were in the South, a majority of the
  89. south carolina history help me ASAP PLZZZZZ

    which of the following was an important change made to south carolinas second constitution in 1778? the low country had many more representatives than the up country. the state leader would be a governor, not a president. the press was more limited in what
  90. 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 = 17.9 kg and an initial velocity of = 8.82 m/s, due east. Object B,
  91. 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 = 17.5 kg and an initial velocity of = 8.50 m/s, due east. Object B,
  92. Algebra..please check my work!!

    At 3 p.m., Brunhilde headed north at 30 kilometers per hour. Two hours later Ludwig headed south at 40 kilometers per hour. At what time will they be 340 kilometers apart? I know that the distance from Brunhilde(Db) plus the distance from Ludwig(Dl) is
  93. CHEM

    I just have one more question regarding electron configurations for the following ions: Mo^3+ V^3+ I cannot understand why my answers are not working. Not listing as ground-state configs, but as full e- configs: shouldn't Mo^3+ be: 1s2, 2s2, 2p6, 3s2, 3p6,
  94. algebra 2

    A car enters an interstate highway 15 mi north of a city.The car travels due north at an average speed of 62.5 mi/h.Write an equation to model the car’s distance d from the city after traveling for h hours. Graph the equation
  95. US history

    When Kennedy was elected president, many were: A. pleased because of his clear experience. B. fearful because he had appointed such controversial people to the cabinet. C. pleased because of sound cabinet appointment and his ability to inspire. I think it
  96. Grade 12 Physics

    A rocket ship is moving away from the earth after having been fired from a launch pad in Florida. At what point above the earth's surface will the force of gravity be reduced to ½ of its original value? ------------------ Prior to this question I was
  97. history please help

    1. Select a new deal program that helped improve the lives of south Carolinians. Explain what the program improved and how it helped the people of South Carolina 2. Explain how rationing affected the people on the home front during world war II. how did
  98. History

    Which best describes the role of mercantilism during the 1600s? european countries wanted to expand their wealth by exporting raw materials from colonies european colonies in the south America grew wealthy by seizing gold from native tribes european
  99. physics

    A simple Geiger counter is constructed out of a setup similar to what we just used in problem 5. A thin wire with a linear charge density _ is held in the center of a cylindrical tube, which is filled with an inert gas. When a high speed 2 particle coming
  100. chemistry

    Which element has atoms that can form single, double, and triple covalent bonds with atoms of the same element? the choices are florine, oxygen,carbon and hydrogen. i also need a explanation of why its the right answer. thanks for helping :) How do we see