1. Engineering science N4

    A ship is 100km north-west of cape town harbour and it sails directly north at a velocity of 30km/h in 8 hours.calculate its resultant speed with reference to the cape town harbour in magnitude and direction.

    asked by Mike on January 30, 2014
  2. college

    At the center of a 50 m diameter circular ice rink, a 75 kg skater traveling north at 2.5 m/s collides with and holds onto a 60 kg skater who had been heading west at 3.5 m/s. How long will it take them to get to the edge of the rink. Where will the reach

    asked by charlotte on December 1, 2010
  3. physics

    mass of planet is half that of earth and radius of planet is one fourth that of earth if we plan to send an artificial satellite from planet the escape velocity will be in km/s

    asked by sujatha on October 26, 2017
  4. physics

    What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

    asked by caroline on May 13, 2014
  5. Physics

    What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

    asked by Max on March 2, 2010
  6. physics

    what is the apparent angle the diameterof the moon subtends as seen from the earth in radians. average moon earth distance3.84*10e8 radius of the moon 1.74*10e6

    asked by jakkila on August 31, 2009
  7. Physics

    Consider points on the Earth's surface as sketched in the figure below. Because of the Earth's rotation, these points undergo uniform circular motion. Compute the centripetal acceleration at the following points.

    asked by Sierra on June 29, 2012
  8. math

    A motorcycle leaves colorado springs, colorado, traveling north on I25 at an average speed of 47 mph. one hour later, a car leaves colorado springs, traveling south on I-25 at an average speed of 54 mph. How long after the motorcycle leaves will it take

    asked by kelly on March 5, 2013
  9. Physics

    On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball. The acceleration due to gravity on the moon is 1/6 of its value on the earth (gravity on moon -1.633m/s2). On earth, golf balls are driven at about 70 m/s with a loft angle of

    asked by Arr-chan on April 29, 2014
  10. physics

    still cant get this one? so damon i know you wanna help! or anyone else im open for suggestions haha 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

    asked by rory on December 21, 2007
  11. 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

    asked by maggie on September 24, 2017
  12. Chemistry

    ---This was the previous one--- Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in which they participate, they are reduced to A-, B-, and C- ions, all of which are colorless.

    asked by Gg on October 8, 2014
  13. math

    X is a point 2800 m East of Y. Due North of X is another point Z whose bearing from Y is N63°E. P is due North of Y and its bearing from X is N25°W. Calculate XZ and XP (give your answers to four significant figures)?

    asked by Wesley on May 8, 2016
  14. statistics

    The authors state that the heights of women in North America are normally distibuted with a mean of 65.0 and a standard deviation of 3.5 inches. I am 64.5 inches. Using the parameters above, what percent of women in North America are shorter than I am?

    asked by Maria on July 2, 2012
  15. physics

    An airplane is 5,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the x-axis east, y axis north, and z axis up.

    asked by tabby on May 14, 2014
  16. physics

    An airplane is 50,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the x-axis east, y axis north, and z axis up.

    asked by Iworlock on September 28, 2014
  17. Physics

    An airplane is 5,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the x-axis east, y axis north, and z axis up.

    asked by Eugene on March 9, 2014
  18. PHYSICS math

    2. An airplane is 50,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the x-axis east, y axis north, and z axis

    asked by MICHAEL T. on April 13, 2015
  19. Physics

    A simple pendulum has a period T on the surface of planet Earth. When taken to the surface of planet X, the same pendulum has a period 2T. a) If the radius of planet X is 1/2 the radius of Earth, what is the mass of Planet X, relative to the mass of Earth?

    asked by Chan on May 16, 2011
  20. physics

    A sports car weighing 600 kg travels North at 35 m/s. Running a stop sign, the car crashes into a 2000 kg truck traveling East at 20 m/s. The vehicles become locked together and travel 18 meters before stopping. Find the direction and the deceleration of

    asked by kala on June 1, 2016
  21. math

    South America’s population was 515,000,000 people in 2000 and 38,000,000 in 1900. To find the rate of increase, we should begin with subtracting to find the actual increase –

    asked by Sara on August 2, 2010
  22. Social Studies

    1.What was North Korea’s response to President George W. Bush’s 2001 threat to stop negotiations? A. North Korea immediately gave in to his list of conditions. B. North Korea resumed its nuclear program. C. North Korea sought the help of the United

    asked by Arianne on April 23, 2017
  23. Social Studies

    1.What was North Korea’s response to President George W. Bush’s 2001 threat to stop negotiations? A. North Korea immediately gave in to his list of conditions. B. North Korea resumed its nuclear program. C. North Korea sought the help of the United

    asked by YunoGasai on April 24, 2017
  24. Social

    1.What was North Korea’s response to President George W. Bush’s 2001 threat to stop negotiations? A. North Korea immediately gave in to his list of conditions. B. North Korea resumed its nuclear program. C. North Korea sought the help of the United

    asked by Arianne on April 21, 2017
  25. Chemistry

    1)How many protons and electrons are in a sulfate ion SO4^2- ? I know the answer is 48 protons and 50 electrons but i do not know how to get this from the ion. 2) What is the charge on a sulfide ion? The answer is -2 but im not sure why. Is sulfide always

    asked by Hannah on December 4, 2011
  26. Chemistry(Please help)

    1)How many protons and electrons are in a sulfate ion SO4^2- ? I know the answer is 48 protons and 50 electrons but i do not know how to get this from the ion. 2) What is the charge on a sulfide ion? The answer is -2 but im not sure why. Is sulfide always

    asked by Hannah on December 4, 2011
  27. Chemistry

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water? I am not quite sure what the reaction is, but if you are going from Fe(2+) to Fe(3+), the Fe is losing one

    asked by Jessica on April 23, 2007
  28. Physics

    Earth's moon is 3.8 X 10 8 m from the planet and is in freefall. Acceleration due to the Earth's gravity acting on the moon is 2.70X 10 -3. What is the moon's speed? How long does it take to make a complete orbit?

    asked by Julie on April 23, 2010
  29. physics

    An Earth satellite moves in a circular orbit 616 km above the Earth's surface. The period of the motion is 96.8min. (a) What is the speed of the satellite? (b) What is the magnitude of the centripetal acceleration of the satellite

    asked by TNT on February 17, 2018
  30. science

    What is the average speed of a satellite given the following information. 1) The earth's radius = 6000 km 2) The satellite is 900 km from the earth's surface 3) The satellite's orbital period: 2 hours 4) Circumference = 2pr (p = 3.14) A) 6 km/s B) 10 km/s

    asked by Tori on February 11, 2014
  31. Physics

    A rocket has put your spacecraft in a circular orbit around Earth at an altitude of 350 km. Calculate the force due to gravitational between the Earth and the spacecraft in N if the mass of the spacecraft is 2450 kg.

    asked by Kay on October 11, 2015
  32. physics

    How do I go about in solving this? A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? ___ km (b) What is the satellite's acceleration? ___m/s2

    asked by jake on March 8, 2010
  33. Social Studies

    1.What was North Korea's response to president George W. Bush's 2001 threat to stop negotiations? A.North Korea immediately gave into his list of conditions B.North Korea resumed to nuclear program C.North Korea sought the help of the United National

    asked by Joseph on May 1, 2017
  34. physics

    John and Mary are skating at an ice rink. John skates at a constant speed of 6.7 m/s, with respect to the ice surface, directly south. Mary skates at a constant speed of 11.5 m/s in a direction of 34° west of south, with respect to the ice. What are the

    asked by Anonymous on January 26, 2015
  35. 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 33 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.

    asked by RImon on November 5, 2010
  36. Physics

    A spy satellite is in circular orbit around Earth. It makes one revolution in 6.04 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?

    asked by Max on March 3, 2010
  37. physics

    gravity on the surface of the moon is only 1/6 as strong as gravity on earth. what is the weight of a 37 kg object on the earth? The acceleration of gravity is 10m/s answer in units of N

    asked by Anonymous on October 15, 2010
  38. College 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 14 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.

    asked by Jennifer on March 2, 2010
  39. College Physics

    A spy satellite is in circular orbit around Earth. It makes one revolution in 5.99 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?

    asked by Megan on September 25, 2009
  40. science

    could someone pleassssse help me answer these questions? do we always see the same side of the moon and how do you know for sure? if the moon rotated just asa quickly as earth , would we see the same sides of the moon from earth?explian.

    asked by samamtha on February 17, 2011
  41. physics

    2.A spy satellite is in circular orbit around Earth. It makes one revolution in 6.02 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?

    asked by jimmyjonas on February 22, 2011
  42. Geography

    Just letting you guys know-- for one of my exams I asked this question: 'This nation is in South Asia. One of South Asia's three major rivers are in this country. The country has two climate regions, arid and semi-arid and the dominant religion in this

    asked by mysterychicken on November 5, 2009
  43. modern physics

    Missiles are fired towards the earth from a spacecraft. The missiles are moving with a speed of 0.8c with respect to the spacecraft. If the spacecraft itself has a speed of 0.3c with respect to Earth, how fast are the missiles observed to travel with

    asked by gourav on March 21, 2017
  44. modern physics

    Missiles are fired towards the earth from a spacecraft. The missiles are moving with a speed of 0.8c with respect to the spacecraft. If the spacecraft itself has a speed of 0.3c with respect to Earth, how fast are the missiles observed to travel with

    asked by gourav on March 19, 2017
  45. Physics

    A person walks 25.0 degrees north of east for 3.10 km. How far would another person walk due north and due east to arrive at the same location? I don't understand how I could calculate the needed distance accuratly. I used 3.1*sin(25) + 3.1*cos(25). But I

    asked by fred on August 25, 2009
  46. engineering

    a ship is 100km north west of cape town harbour and it sails directly north at a velocity of 30km/h in ei ght hours.calculate its resultant speed with reference to the cape town harbour in magnitude and direction

    asked by Anonymous on February 20, 2013
  47. Physics

    In a vacuum, two particles have charges of q1 and q2, where q1 = +3.8C. They are separated by a distance of 0.37 m, and particle 1 experiences an attractive force of 4.7 N. What is the value of q2, with its sign? Two spherical objects are separated by a

    asked by Liz on August 26, 2013
  48. chem

    (5) In this experiment MnO4-is reduced to Mn 2+ by the unknown. What is the equivalent weight of MnO4- for this experiment? 52.68 (6) How many equivalents of electrons were transferred from the unknown solution? (7) What is the Normality of the 1.00 mL of

    asked by bry on October 28, 2011
  49. chemistry

    how would you draw a chemical bond representation for: NH4 plus 1 thanks for your help:) It is almost impossible to draw Lewis electron dot structures for ANY molecule or ion on these boards BUT here is a try.    H    : H:N:H+

    asked by Jillian on December 18, 2006
  50. Physics

    A person walks 28.2◦ north of east for 3.33 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk?

    asked by Louis on October 9, 2011
  51. Physics

    Hi, I'm stuck with the following question: The acceleration due to gravity on Mars is only 3.75m/s^2. You would like to modify an antique grandfather clock so that it would still keep accurate time on Mars. If the length of the pendulum on Earth is l, what

    asked by Grace on February 14, 2017
  52. Physics 20

    Astronauts in orbit appear to be 'weightless'.Suppose an astronaut with a mass of 154 KG including gear is in orbit in the space shuttle, a distance of 222 km above the Earth;s surface.Taking the Earth's radius to be 6371km, and its mass to be 5.97 X

    asked by Abdurhman on January 22, 2017
  53. 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
  54. physics

    Imagine a parallel universe in which the electric force has the same properties as in our universe but there is no gravity. In this parallel universe, the sun carries charge Q, the earth carries charge −Q, and the electric attraction between them keeps

    asked by jack on January 31, 2016
  55. 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

    asked by tina on October 9, 2013
  56. 4 Grade

    About how many people lying head-to-toe are needed to strech around the earth? Is it closest to : a) 1 million; b) 25 million; c) 100 million? (Hint: The distance around the earth is approximately 25,000 miles).

    asked by Nina on April 7, 2010
  57. physics

    An Earth satellite moves in a circular orbit 775 km above the Earth's surface. The period of the motion is 100.1 min. (a) What is the speed of the satellite? m/s (b) What is the magnitude of the centripetal acceleration of the satellite? m/s2

    asked by john on December 14, 2008
  58. Physics I

    An Earth satellite moves in a circular orbit 770 km above the Earth's surface. The period of the motion is 100.0 min. What is the speed of the satellite? What is the magnitude of the centripetal acceleration of the satellite?

    asked by Amber on September 14, 2011
  59. science

    Why did the following change occur ? The snow that covered the ground all winter began to melt,temperature rose, and flowers started to bloom. a) days became shorter b) earth's tilt on its axis shifted. c) the sun's rays became more concentrated d) Earth

    asked by victoria on November 14, 2013
  60. Chemistry

    The problem How many electrons does the netural atom gain or lose to form each of the following ions? 1)Ca2+ 2)I- The answer is contained in the question. If there is a "+", elecrons are lost. If there is a "-", electrons are gained. The number gained or

    asked by Bryan on January 2, 2007
  61. 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
  62. 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
  63. Physics

    Displacement vector A with arrow points due east and has a magnitude of 2.62 km. Displacement vector B with arrow points due north and has a magnitude of 2.26 km. Displacement vector C with arrow points due west and has a magnitude of 1.4 km. Displacement

    asked by Rob on September 13, 2014
  64. physics

    In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?

    asked by Vlera on January 13, 2013
  65. physics

    In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?

    asked by PLEASE HELPPP on January 13, 2013
  66. physics

    The mass of the Earth is 5.972kg, and the radius of Earth is 6, 371 km. A 750 kg satellite orbits 35, 800 km above Earth in a perfectly circular orbit. 1. If the gravitational force is the centripetal force keeping the satellite in a stable cicular orbit,

    asked by LESTER on November 14, 2016
  67. math

    Mr. Wong left his house and drove north for 5 blocks, then turned right and drove 6 blocks, then turned south and drove 2 more blocks. Finally, he turned right again and drove one more block to end up at the library. How many blocks east of Mr. Wong’s

    asked by Destiny J on September 12, 2013
  68. 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

    asked by Maggie on November 22, 2009
  69. 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

    asked by julia on November 23, 2009
  70. 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

    asked by maggie on November 21, 2009
  71. Chemistry

    What is the octet rule? How does the rule explain the common ion of fluorine and of calcium? The octet rule is when an element contains 8 valence electrons. The rule explains the common ions of fluorine and calcium to show how much is needed to gain/lose

    asked by Sam on July 9, 2015
  72. chemistry

    what are some examples of covalent bonds and what are some examples of ionic bonds? Electrons are shared in covalent bonds. Electrons are exchanged in ionic bonds. Typical ionic compounds are NaCl, MgCl2, LiI, etc. Typical covalent compounds are CH4,

    asked by Leeann on January 30, 2007
  73. 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.

    asked by Apple on September 25, 2011
  74. 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

    asked by favs on February 11, 2013
  75. 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.

    asked by Brooke on April 4, 2009
  76. Physics

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

    asked by Maddireddy on May 18, 2017
  77. Physical Science 2

    The attraction or pull of a person's body toward the earth, by the earth is called weight. The reaction to this force is the: My answer is B A. earth's surface pushing against the person's body B. person's body pulling on the earth C. person's body pushing

    asked by Toni on December 31, 2010
  78. Physics

    A plane intends to north with a speed of 250 m/s relative to the ground through a high altitude cross wind of 50 m/s coming from the east. Determine the bearing that the plane should take( relative to due north), A) the planes speed with respect to the air

    asked by Janice on June 19, 2017
  79. AP style

    my question from last night was moved to the second page. But I asked if north central would be hyphenated in AP style.. A tutor replied in what context.. This context: He was born in Zhengzhou, China, which is the capital and largest city of Henan

    asked by Blaze on February 24, 2014
  80. Physics

    Gravity on the surface of the moon is only 1 as strong as gravity on the Earth. 6 What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s2 . Answer in units of N.

    asked by Dede on November 5, 2010
  81. math

    Earth's mass, in kilograms, is 5.97x10^24. the moon's mass is 7.34x10^22. How many times greater is Earth's mass (in scientific notation)?

    asked by Michelle on March 14, 2013
  82. Physics

    The radius of the planet venus is nearly the same of that of the eart but it's mass is only 80% that of the earth. If an object weighs We on the earth (a) what does it weigh on venus (b) calculate the value of g in venus

    asked by Nwajei goodness on June 20, 2017
  83. History

    Who developed the doctrine of nullification John C Calhoun? 14. I am a law that was applauded in the North but despised in the South Manufcaturesl iked me. Farmers wished I would go away My passage led to the Nullification Crisis What law am i A.Wilmot

    asked by M on January 27, 2015
  84. Physics

    An airplane needs to fly due south. The plane can fly at a speed of 720.0 km/hr in still air. If there is a wind blowing to the northeast at 70.0 km/hr, in what direction should the plane fly to maintain its heading of due south? How long will it take to

    asked by Tyler on April 22, 2014
  85. social studies

    How is Paraguay different from the other countries in the Southern Cone? 1.Almost all of its people speak a South American Indian language. 2.It has a higher percentage of people with only European ancestry. 3.Most of its people are of purely of South

    asked by elizabeth on November 29, 2018
  86. History

    The Underground Railroad used escape routes that went throughout the South. Based on that fact, which of the following conclusion could be made? A) The Southern states were leaning toward emancipation of the slaves. B) Slaves were hopeful to acquire jobs

    asked by Gerard Way on March 7, 2017
  87. Social Sudies please help

    In South Africa, the President is elected by members of the National Assembly who are elected by the citizens. This means that South Africa has WHICH type of government? A) unitary system Eliminate B) direct democracy C) confederal system D) parliamentary

    asked by School on September 1, 2015
  88. Physics

    Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

    asked by Jonathan on September 25, 2011
  89. physics

    Emily takes a trip, driving with a constant velocity of 89.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 70.8 km/h to the north, how long does the trip take?

    asked by ashley on September 12, 2012
  90. Physics

    Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

    asked by alex on September 26, 2011
  91. physics

    Two airplanes taxi as they approach the terminal. Plane 1 taxies with a speed of 12 m/s due north. Plane 2 taxies with a speed of 8.5 m/s in a direction 20 degrees north of west.

    asked by Anonymous on January 12, 2012
  92. Science/math

    Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

    asked by Jonathan on September 24, 2011
  93. Physics

    Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

    asked by Jonoathan on September 23, 2011
  94. Physics

    Stan takes a trip, driving with a constant velocity of 81.5 km/h to the north except for a 22 min rest stop. If Stan's avg velocity is 66.80 km/h to the north, how long does the trip take?

    asked by JP on September 23, 2011
  95. math

    Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

    asked by Anonymous on September 25, 2011
  96. physics

    A person walks 25.0 degrees north of east for 3.80 km. How far would the person walk due north and due east to arrive at the same location? I did the Sin of 25 but the answer was wrong

    asked by sheila on September 25, 2009
  97. Physics

    What is the difference in shape on a graph 70 degrees south of east and 70 degrees east of south?

    asked by jake on March 3, 2010
  98. Science

    ing to Wegener's hypothesis of continental drift,? A.Earth's surface is made up of seven major landmasses. B.the continents do not move. C.Earth is slowly cooling and shrinking. D.the continents were once joined together in a single landmass.•• Correct

    asked by Tanner fox on March 17, 2016
  99. Physics

    Left over from the big-bang beginning of the universe, tiny black holes might still wander through the universe. If one with a mass of 3.5 1011 kg (and a radius of only 1.0 10-14 m) reached Earth, at what distance from your head would its gravitational

    asked by William on February 20, 2011
  100. Science

    1> What 2 types of electromagnetic energy have wavelengths of 0.76 cm? 2> What is the pressure at a depth of 3000 km inside the Earth? 3> How many inches of mercury are equivalent to 974.5 millibars of air pressure? 4> Jupiter's period of revolution is how

    asked by Lisa on September 14, 2008