1. Physics

    Why does the force of gravity change the speed of a satellite in an elliptical orbit? 1)The force of gravity is always tangent to the satellite motion. 2)Gravity speeds up the satellite as it moves away and slows it on its return. 3)The force of gravity is always perpendicular...
  2. science

    What universal force is primarily responsible for keeping satellite in orbit around earth? Answers are electromagnetic force, strong nuclear force, gravitational force, weak nuclear force. Thank you
  3. Physics

    When an item has been launched into orbit, what happens? 1: It continues to fall but its path never reaches the ground. 2: Centripetal force from Earth's gravity keeps it from being accelerated toward Earth. 3: It no longer falls because the weakness of Earth's gravity with ...
  4. college

    A newly discovered planet is found to have a circular orbit, with a radius equal to 11 times the radius of Earth's orbit. How long does this planet take to complete one orbit around the Sun?
  5. PHYSICS FINAL (orbital)

    A 3300kg satellite is traveling 3550 km above the Earth's surface. Calculate the velocity and period of the satellite. THANK YOU VERY MUCH!!!!
  6. inscribed angles

    A satellite, B is 17,000 miles from the horizon of Earth, Earth's radius is about 4,000 miles. Find the approximate distance the satellite is from the Earths surface. possilbe answers 13,464 17,464 20,957 21,000 I do not understand how to do these problems
  7. University Earth Sciences

    What would happen if a planet's gravity drops? "Living things grow taller" "You can jump higher" Those are not answers I looking for, what I wanna know is if the centre pulling force of a planet is dropping, what would happen to it's mantle, plates, as well as the atmosphere?
  8. Physics

    You are in a space shuttle traveling in the circular orbit, which is 380 km above the Earth. Your friend is in another space shuttle traveling on the same circular orbit with you, but he is 20 km ahead of you. (a) How long will it take you to catch up with your friend if you ...
  9. math

    Calculate the speed of an artificial earth satellite, assuming that it is travelling at an altitude h of 140 Km above the surface of the earth where g=9.8m/s2. The radius of earth R is 6373Km.
  10. English

    Thank you for your help. I have one more similar set related to 'a long way' and 'far.' Which one do you use frequently?In a grammar book here, #2 and #4 are regarded as incorrect sentences because 'far' is used in a positive sentence. Is that explanation correct? 1. We went a...
  11. Physics

    A satellite has an orbit with pedigree 175 km and apogee 181,200 km. What is the period of the orbit? >>I'm not sure what the associated equation is. I tried the problem using the average radius in the period equation but it didn't work. Please help!
  12. Phsyics

    In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 1.00×1016 kg and a radius of 8.50 km. What is the speed of a satellite orbiting 4.70 km above the surface? What is the escape speed from the asteroid?
  13. physics

    A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 118 km away. The radar antenna is pointing upward at an angle of 58.2 ° above the ground. Find (a) the x and (b) the y components (in km) of the position ...
  14. physics

    A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 181 km away. The radar antenna is pointing upward at an angle of 66.2 ° above the ground. Find (a) the x and (b) the y components (in km) of the position ...
  15. Physics

    A CsCl (cesium chloride) salt crystal is built from the unit cells shown in the figure below. Cl− ions form the corners of a cube and a Cs+ ion is at the centre of the cube. The edge length of the cube, which is called the lattice constant, is 0.4 nm. (a) What is the ...
  16. Physics(Please help)

    A satellite of mass 500kg orbits the Earth in a circular path with radius 1.0e^7 m . 1) What is the period of the satellite? I know that the equation is T= 2(pi)r^3/2 / sqrt GmE mE = 5.98e^24 does G = 6.67e^-11 ??
  17. PLEASE HELP FINAL PROBLEM ORBITAL

    A 3300kg satellite is traveling 3550 km above the Earth's surface. Calculate the velocity and period of the satellite. THANK YOU VERY MUCH!!!!
  18. Physics

    In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 1.00×1016 and a radius of 8.50 . What is the speed of a satellite orbiting 4.70km above the surface? What is the escape speed from the asteroid?
  19. Physics

    When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth (You can get more educational NASA resources from: The distance separating the center of the earth ...
  20. English

    I left out these sentences. Thank you. 1) We are leaving from Alba for Genoa on 23 March at 12.30 am. We are meeting at Medford Square, just in front of the hotel called The Castle at 12.00 a.m. 2) We are scheduled to arrive in Genoa at 13.45. In the afternoon, we are going on...
  21. Physics

    In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 1.00×1016 and a radius of 8.50km . What is the speed of a satellite orbiting 4.70km above the surface? What is the escape speed from the asteroid?
  22. french

    Je Suis Allee A Le Centre Commercial
  23. math

    how the distance between centre of circle if: x^2+y^2+2x-2y-11=0 and x^2+y^2-4x+6y-17=0
  24. maths

    What is the centre of the equation 4x^2 9y^2 - 32x 36y 11
  25. chemistry

    which orbitals have centre of symmetry
  26. mathematics

    equation 2x-3y=10 touches the circle with centre m (-2,4)
  27. physics

    1. The physics of Mars and its two moons. Mars has two moons, Phobos and Deimos (Fear and Panic, the companions of Mars, the god of war). Deimos has a period of 30 h, 18 min and a mean distance from the centre of Mars of 2.3 x 104 km. If the period of Phobos is 7 h, 39 min, ...
  28. Physics please help!!

    A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.23 hours. What is density of the planet? Assume that the planet has a uniform density.
  29. Physics

    Earth speeds along at 29.8 km/s in its orbit. Neptune's nearly circular orbit has a radius of 4.5 x 109 km, and the planet takes 164.8 years to make one trip around the Sun. Calculate the speed at which Neptune plods along in its orbit.
  30. Math

    How do I solve the following word problem : A satellite orbits Earth in a circular path with equation x squared + y squared = 1.44 times 10 to the power of 8. With distances measured in kilometers. Another satellite orbiting in the same plane passes through the point (8000,...
  31. physic

    A long jumper's take-off velocity is 10 m/s at an angle of 20o to the horizontal. His centre of gravity is 1 m above the ground at take-off and is 0.5 m above the ground at landing. a)How far does he displace his centre of gravity horizontally between take-off and landing? b) ...
  32. Physics Urgent!!

    A day on Mars is 24.6 Earth hours long. A year on Mars is 687 Earth days long. How do the angular velocities of Mars’ rotation and orbit compare to the angular velocities of Earth’s rotation and orbit? w(M)/w(E)= and w(My)/w(Ey)= w is what I used to represent omega...
  33. physics

    The gravitational field strength at 35700km above earth is .225N/kg. what is the tangental velocity of a 100000kg communication satellite? mass of earth = 5.98E24kg and radius of earth = 6.37E6m
  34. math

    A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which representation may be more ...
  35. physics

    (1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), where Re is the radius of the ...
  36. physics

    (1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), where Re is the radius of the ...
  37. Dynamics

    True or false (Each question carries 1 marks) (i) A rigid body is an idealization of the behavior of a body. (ii) A Geo-stationary satellite follows a circular orbit at a unique and has a time period of 24h. (iii) Constancy of areal velocity for a central force motion of a ...
  38. science

    An earth satellite in an elliptial orbit moves with a) slower speed as it ages b) none of the above c) constant speed d) faster speed as it ages Just need to know if my answer or right or wrong. Thanks! :) b or d but im strongly going for D but i could be wrong
  39. science science science science science science

    The moon orbits around the earth.Which of the following keeps the moon traveling in the same path each time it orbits the earth? A.energ from the surroundings B.Pull of gravity between the moon and the earth C.orbits in space are pushing the moon towards the earth D.the winds ...
  40. earth

    Suppose a geologist is studying two distinct areas next to a spreading ridge. The magnetic direction of the minerals in the oldest area is opposite to the magnetic direction of minerals in the newest area. (a) Which area is closest to the centre of the ridge, the older or ...
  41. English

    Can someone help me check the grammar in these sentences? Thank you very much in advance. 1)If I go on a short flight journey, I’d rather take a hand luggage with me. 2)If I’m going on a tropical island, I’d like to stay in a hotel next to the beach and spend all your ...
  42. Physics - Center of Mass

    A square aluminum plate (volume mass ρ = 2700 kg/m^3) has dimension L = 4.8 m and e = 0.9 m. A cylinder of radius R = 1.5 m and at a distance d = 1.2 m from the center of the plate and at 20 deg with the horizontal, is removed from the plate. Find the centre of mass of this ...
  43. Antarctica

    information and diagrams of a scientific research centre
  44. physics

    How can we determine the centre of mass of a hollow sphere?
  45. Physics

    Which of the following is the equation of the circle with centre (-1.5, 0.5) and radius 3? A. 2x^2 + 6x + 2y^2 - 2y - 13 = 0 B. 2x^2 - 6x + 2y^2 + 2y - 13 = 0 C. 2x^2 - 6x + 2y^2 - 2y - 13 = 0 D. 2x^2 + 6x + 2y^2 - 2y - 23 = 0 E. @x^2 + 6x + 2y^2 - 2y -14 = 0
  46. maths

    of 2 chords the 1 which is nearer to the centre is larger.proof
  47. Maths

    the centre of circumscribing the quadrilateral whose sides are 3x+y=22,x-3y=14 and 3x+y=62.
  48. English

    Can you check these sentences for me, please? 1)He is a superstar now and he is slamming (a synonym?) on his guitar. 2)He is responsible for the building (?) of Westminster Abbey. 3)He withdrew from Britain to defend Rome against (or from?) a Barbarian attack. 4)According to ...
  49. Physics help

    A ladder of length 2L and mass M is positioned on level ground leaning against a wall such that the angle between the ladder and the horizontal is α. The coefficient of static friction between the ladder and the wall and between the ladder and the ground is μstatic = 0.65. ...
  50. Physics

    If you suddenly multiplied the mass of Earth by a factor of 4, how would the period of a satellite change, if the radius of its orbit did not change? 4 times as long 1/4 as long 2 times as long 1/2 as long Unchanged
  51. Physics Homework

    Consider problem U concerning the geosynchronous satellite of mass 50 kg. It orbits at a radius of 42,300 km with a speed of 3076 m/s. a) How much energy is needed to lift the satellite from the earth's surface (Re=6,370 km) up to that radius? b) How much kinetic energy does ...
  52. Calculus and vectors

    A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which representation may be more ...
  53. physics

    A 150-kg ladder leans against a smooth wall, making an angle of 30 degrees with the floor. The centre of gravity of the ladder is one-third the way up from the bottom. How large a horizontal force must the floor provide if the ladder is not to slip?
  54. phy

    A 150-kg ladder leans against a smooth wall, making an angle of 30 degrees with the floor. The centre of gravity of the ladder is one-third the way up from the bottom. How large a horizontal force must the floor provide if the ladder is not to slip?
  55. physics

    There is a typo in this question. Ignore the ”cdot” in the units for G. A satellite is in a circular orbit just above the surface of the Moon. What is the satellite’s acceleration? The value of gravitational constant is 6.67259 × 10−11 Ncdotm2/kg2 and the mass of ...
  56. physic

    In an accidental explosion, a satellite breaks in half while in circular orbit about Earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?
  57. ITT

    In an accidental explosion, a satellite breaks in half while in circular orbit about earth. one half is brought momentarily to rest. what is the fate of the half brought to rest? what happens to the other half?
  58. Physics

    In an accidental explosion, a satellite breaks in half while in circular orbit about earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?
  59. Physics

    Use the following numbers for this question. MEarth 5.98e+24 kg MJupiter 1.9e+27 kg MSun 2e+30 kg Earth-Sun distance 150000000000 m Jupiter-Sun distance 778000000000 m rE 6380000 m rJ 69000000 m G = 6.67e-11 Nm2kg-2 the acceleration due to gravity at the surface of Jupiter has...
  60. Physics

    A) the earth year is 365.25 days long. How long would our year be if earth followed the same orbit, but was only the mass of Mars? Answer this in earth days. B) How long would our year be if earth were the same mass, but had the orbital distance of mercury Answer this in earth...
  61. As Physics

    Use the equations below: P=mv Ek=1/2mv^2 4) A wooden target of mass 2.00kg is suspended from a branch so that it swings freely. The target is hit by an arrow of mass 0.10kg travelling horizontally and the arrow embeds itself in the centre of the target. The target swings ...
  62. 12th grade physic

    Q. A satelite is in a circular orbit around the earth with a period of 6.0 hours. A retrorocket thruster is fired which slows the satelite down to half its speed and places it in a new orbit. G = 6.67 x 10 power of -11 N.m2/kg2 mass of earth = 5.98 x10 power of 24 Kg radius of...
  63. Foreign languages

    Can you please check these sentences, Writeacher? 1) I would like to book a room with a double bed and a single bed (at a certain price) for person (sharing) which (alsoincludes breakfast and dinner for seven nights. (Can you help me express this sentence better?) 2) Prior to ...
  64. algebra

    the formula d=(square root)12,800+h^2 gives the distance d in kilometers to the horizon from a satellite h kilometers above Earth.Find the distance to the horizon to the horizon from a satellite 4200 km above Earth. Round to the nearest kilometer. PLEASE HELP ME
  65. physics (check my answers)

    When the nuclear fuel in the sun is gone, the sun will collapse to a a. black hole b. white dwarf c. supernova d. neutron star My answer: I think its a black hole. If the mass of the Earth were suddenly doubled while the radius was unchanged, your weight would be? My answer: ...
  66. Physics

    A semi- trailer truck (seen from back) of mass M is negotiating a right hand curve on a level highway, The constant speed of the truck is v and the radius of curvature of it's circular trajectory is R. The road exerts normal forces on the trucks tires F1, F2 and a horizontal ...
  67. physics

    1.)The apparent weight of a passenger in an elevator is greater than his true weight? Why is that? 2.) The radius of larger circle is twice that of a small circle. Two identical stones are attached to cords that are being whirled on a table top at the same speed. How would the...
  68. physics

    What is the net flux through the surface when charge is at the centre?
  69. maths

    Given the equation of an ellipse as 5x^2+3y^2-15=0 find the centre and foci
  70. math

    Find the centre of the circle that passes through the points p(-9,5), q(1,5), and r(-2,-2)
  71. Mathematics

    Calculate the radius of a circle in which a chord of length 10 cm is 12 cm from the centre
  72. mathematics

    find the equation of a circle with centre (2,-3)and radius 2 unit
  73. maths

    what is the pros and cons of locating a business in City Centre
  74. math homework

    give the coordinates of the circles centre and its radius (x-7)^2 + (y+4)^2 = 16
  75. math

    AB is a diameter of a circle with centre at origin.what are the coordinates of B if coordinate of A are (3,-4)?
  76. math

    AB os a diameter of a circle with centre at origin.what are the cootdinates of B if coordinate of A are(3,-5)
  77. geometry (help steve)

    A circle of radius 1 is drawn in the plane. Four non-overlapping circles each of radius 1, are drawn (externally) tangential to the original circle. An angle γis chosen uniformly at random in the interval [0,2π). The probability that a half ray drawn from the ...
  78. As physics

    Use the equations below: P=mv Ek=1/2mv^2 4) A wooden target of mass 2.00kg is suspended from a branch so that it swings freely. The target is hit by an arrow of mass 0.10kg travelling horizontally and the arrow embeds itself in the centre of the target. The target swings ...
  79. college physics

    A space shuttle is in a circular orbit at a height of 250km, where the acceleration of Earth’s gravity is 93% of its surface value. What is the period of its orbit?
  80. Science

    I want to see earth in satellite image. I know about google and wikimapia, are there any other sites that have satellite images for you to see for free?
  81. Physics

    A satellite orbits the Earth with a radius of 7000km. The acceleration of gravity at this distance=8.17m/s/s. How do I find the velocity of the satellite? I'm really struggling with finding the correct formula. I know the answer but can't figure out how to get there. Thanks if...
  82. Math

    Completely bemused, do not know how to get the answer. a)8π b)7√2 c)27√π d)7√×7√×1 13- Determine the exact total surface area of a sphere with radius 2√2 metres. a) An inverted cone with side length 4 metres is placed on top of the ...
  83. Physics

    When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? The distribution of mass in the earth is spherically symmetric. The density of the earth is the same everywhere. The earth's interior is solid everywhere...
  84. Physics

    When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...
  85. physics

    a space shuttle is in a cic ular orbit at a height of 250 km, where the acceleration os earth,s gravity is 93 percent of its surface value. that is the period of its orbit
  86. maths

    given the following equation for a circle x^2-8x+y^2+4y+11=0 find its centre and radius
  87. futhermaths

    A circle has its centre on the x-axis and passes through(4,1)and(1,5).find its equation.
  88. math

    how to find circum centre of a triangle when three coordinates are given
  89. math

    state the corrdinates of the centre of the circle described by the equation. x^2+y^2=R^2 please help!
  90. mathematics

    What is an equation of ellipse centre at c(-1,2),focus at f(-1,5)& passes through point p(5,6).
  91. MATHS

    Q) Find the coordinates of the centre of a circle that passes through points (7,2), (2,3), and (-4,-1)
  92. Physics

    A charge q is placed at h distance from the base of centre . Find the flux ?
  93. English

    I’m at the tourist centre in Boston the speakers tone can best be described as
  94. Maths

    A circle has its centre on x axis and passes through(5,1) And (3.4). Find its equation.
  95. Math

    I need to design a site plan for a wildlife centre. In order to save money, I must design the plan using the least amount of fencing possible. The plot of land is 80 m wide by 100 m long, and it must be fenced off. Each section for each animal must be fenced off. The building ...
  96. PHYSICS

    This is the exact problem from the paper and I got an answer of 4.2 * 10^7 and I was wondering if this was the right answer. What is the height above the earth's surface at which all synchronous satellites (regardless of mass) must be placed in orbit? The period of synchronous...
  97. Summer School Calculus

    I don't know how to answer this: A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe ...
  98. Physics HELLLPPPP

    When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...
  99. science help

    Which of the following sets of characteristics describe what we know about the dwarf planets? Orbits the sun, has sufficient mass to assume a nearly round shape, and lacks the gravity to clear items near its orbit. Has sufficient mass to maintain a round shape, orbits the sun...
  100. physics

    An asteroid, whose mass is 2.0 10-4 times the mass of Earth, revolves in a circular orbit around the Sun at a distance that is 2.9 times Earth's distance from the Sun. (a) Calculate the period of revolution of the asteroid in years. (b) What is the ratio of the kinetic energy ...
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