1. Math

    Cameron is located 2 miles due East of an intersection between two country roads. He decides to walk in a straight line (cross-country) toward a position 3 miles due North of the intersection; it takes Cameron one hour to reach that location. (a) Find parametric equations for ...
  2. main idea

    The main conclusion you can draw from this paragraph is that A. because of the greenhouse effect, plants on Earth should thrive. B. a greenhouse helps plants to grow faster. C. the atmosphere keeps Earth warm D. in a greenhouse, the Sun's heat is trapped by the glass
  3. chemistry

    write the corresponding subshell leters for the combinations given. Fill in the possible number of electrons for these subshells. 1) n=1 2) l value=0 3) l letter? 4) "nl"Designation 5) Maxium # of electrons the table shows n values of 1, 2,2,3,3,4 with l values of 0,0,1,0,1,20...
  4. trig

    a vertical pole 3 meters tall casts a shadow 1.8 meters long. what is the angle of the elevation of rhe sun to the nearest minute?
  5. Math

    ok if the boy is 5ft tall and the flag pole is 15ft tall and 8ft long what proportion can be determaind to the lenght the boys shadow
  6. geometry

    a surveyor on level ground finds the angle of elevation of a 138-foot flagpole to be 47 degrees how far from the base of the pole is the surveyor?
  7. Math Geometry

    The sun rises at 6am; At noon the sun is directly overhead. The height of a pole is 8m tall. What is the length of the shadow at 11am?
  8. physcial science

    What creates a magnetic field? A. charged particles that do not move B. moving electric charges C. gravity D. an isolated magnetic pole
  9. Physics

    On June 9, 1988, Sergei Bubka broke the world pole-vaulting record for the 8th time in four years by attaining a height of 6.14 m. How long did it take him to fall?
  10. physics

    Two electrostatic point charges of +54.0 ¦ÌC and +47.0 ¦ÌC exert a repulsive force on each other of 189 N. What is the distance between the two charges? The value of the Coulomb constant is 8.98755 ¡Á 109 N ¡¤ m2/C2. Answer in units of m
  11. Physics

    A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (θ = 56.0°) Suppose the total mass of a chair and its occupant is 190 kg. (a) Determine the tension in the cable ...
  12. Physics

    The asteroid belt circles the sun between the orbits of Mars and Jupiter. One asteroid has a period of 10 Earth years. a) What is the asteroid's orbital radius? b)What is the asteroid's orbital speed?
  13. Life Science

    By living in areas where other organisms inhabit,humans change the environmental conditions for those organisms. Describe two ways humans impact the environment and what the effects are on the earth? Thesse can either be positive or negative. Please answer in a few minutes.
  14. physics modern

    1. a) If a photon and an electron each have the same energy of 20.0 eV, find the wavelength of each. b) If a photon and an electron each have the same wavelength of 250 nm, find the energy of each. c) You want to study an organic molecule that is about 250 nm long using either...
  15. Science

    The force of gravity on an object on the surface of Mars is less than the force of gravity on an identical object on the surface of Earth. Which of the following explains why this is true?
  16. Science

    can someone help one this question? suppose you are given two liquids and told that one is a compound and the other is a mixture. how might you determine which was which? describe one method you could use. please and thank you
  17. Physics

    Two dogs are pulling on opposite ends of a bone. One dog pulls to the right with a force of 50 N while the other pulls to the left with a force of 40 N. Are the forces on the bone balanced or unbalanced? How do you know? What is the net force on the bone? Would the bone's ...
  18. Physics

    Can someone tell me what the mass of mars is compared to the earth? Mars mass is 6.39 × 10^23 and Earth mass is 5.972 × 10^24 thanks. :3
  19. Math

    Question: An electron is released from rest in a uniform electric field and accelerates to the north at a rate of 249 m/s^2 . Part A: What is the magnitude of the electric field? Answer: E=_____ N/C Part B: What is the direction of the electric field? (Choose one) - to the ...
  20. chemistry

    what is the total number of electrons shared in a double covalent bond between two atoms, and why? four. One covalent bond is two electrons, a double convalent is twice that. why wouldnt it be 8? Because 2*2=4. Reread Bob Pursley's answer. Two electrons is a single bond; ...
  21. physics 111

    A bicycle travels 3.2 km due east in 0.10 h, then 5.6 km at 15.0° east of north in 0.11 h, and finally another 3.2 km due east in 0.10 h to reach its destination. The time lost in turning is negligible. What is the average velocity for the entire trip? i need to find the ...
  22. PHYSICS

    while exploring a cave, a spelunker starts at the entrance and moves the following distances in a horizontal plane. she goes 75.0 m north, 250 m east, 125 m at an angle theta equal to 30.0 north of east, and 150 m south. find her resultant displacement from the cave entrance.
  23. Physics!

    Two ropes pull on a ring. One exerts a 57 N force at 30.0°, the other a 57 N force at 60.0° (a) What is the net force on the ring? Magnitude __?__N Direction __?__° (b) What are the magnitude and direction of the force that would cause the ring to be in equilibrium? __?__N ...
  24. physics

    Two ropes pull on a ring. One exerts a 63 N force at 30.0°, the other a 63 N force at 60.0° (a) What is the net force on the ring? Magnitude ____ N Direction ____ ° (b) What are the magnitude and direction of the force that would cause the ring to be in equilibrium?
  25. Calculus

    Suppose that two boats leave a dock at different times. One heads due north, the other due east. Find the rate at which the distance between the boats is changing when the first boat is 56 miles from the dock traveling at a speed of 35 miles per hour and the second boat is 20 ...
  26. Math

    A rectangular field will be fenced on all four sides. Fencing for the north and south sides costs $5 per foot and fencing for the other two sides costs $9 per foot. What is the maximum area that can be enclosed for $6000?
  27. Physics

    At one instant a bicyclist is 50 m due east of a park's flagpole, going due south with a speed of 18 m/s. Then, 13 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 13 m/s. For the cyclist in this 13 s interval what is the displacement (m) ...
  28. physics

    An iron wire has a cross-sectional area equal to 1.20 10-5 m2. Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 34.0 A. (a) How many kilograms are there in 1.00 mole of iron? 1 kg/mol (b) Starting ...
  29. Phys 2

    I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
  30. Physics

    I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
  31. Social Studies

    You are in europe and you want to travel to australia in which direction will you go? South east You are in the eastern australia and you want to travel to china in which direction will you go? North west You live in Europe and you want to visit South America in which ...
  32. Math

    the sum of two numbers is 27. one number is 3 more than the other number. write and solve a system of equations to find the two numbers. i understand the first equation but i don't know the other one.
  33. algebra 2

    You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.1. the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from the center of the earth...
  34. physics

    Last two problems on the homework! please help with these 2. it helps when detailed explanations are given! thanks A 2 kg ball is thrown horizontally, at 5m/s, from a height of 5 m. How fast will it be moving when it contacts the ground? A 70 kg pole-vaulter converts the ...
  35. Physics help please

    You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 2.070E+7 m and its rotation to be 19.8 hours. You have previously determined that the planet orbits 1.590E+11 m from its star with a period of 368.0 ...
  36. Calculus

    A road running north to south crosses a road going east to west at the point P. Car A is driving north along the first road, and an airplane is flying east above the second road. At a particular time the car is 15 kilometers to the north of P and traveling at 55 km/hr, while ...
  37. math

    A building cast a shadow 42m long. At the same time, the shadow cast by a 34 cm tall pole is 86 cm long. Find the height of the building
  38. Physics

    A)When point charges q1 = +1.5 ìC and q2 = +5.7 ìC are brought near each other, each experiences a repulsive force of magnitude 0.77 N. Determine the distance between the charges. B)Two point charges are fixed on the y axis: a negative point charge q1 = -29 ìC at y1 = +0.21...
  39. 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 should the length of...
  40. Physics

    Three men are trying to move a wardrobe. One pushes northward with a force of 100N; the second pushes eastward with a force of 173N; the third pushes in a direction 60 degrees west of south with a force of 200N. What is the resultant force on the wardrobe and it's direction?
  41. math chem

    Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth¡¯s oceans, because of their high heat capacity, can absorb heat and therefore act to slow down global ...
  42. Math - Physics

    A typhoon moving 165 km/h 300 south of west is caused by two other forces acting in different directions. Find the components of the typhoon’s velocity that is due to the two forces.
  43. Physics

    The De-orbit Burn The Shuttle must reduce its velocity at a pre-calculated point in its orbit in order to return to Earth. In order to reduce the velocity and change the orbit of the Shuttle, a maneuver called the de-orbit burn is performed. For this maneuver, the Shuttle is ...
  44. Physics

    The equation describing the (r, \theta ) coordinates of points along a single field line of a magnetic dipole is r=R_0 \sin ^2(\theta ) where \theta =0 is in the direction of the dipole moment and R_0 is a constant which is different for each field line. The question requires ...
  45. Physics

    What will happen if you try to place two bar magnets of exactly equal size one above the other such that their north poles are on the same side
  46. Phyics

    I have a few questions that I need help with please. Show by algebraic reasoning that your gravitational acceleration toward an object of mass M a distance d away is a = GM/d2 and therefore doesn’t depend on your mass. (I don't understand this question) What does it mean to ...
  47. Physics

    The sum of two point charges is +11μC. When they are 2.7cm apart, each experiences a force of 224 N. Find the charges given that the force is: a) repulsive b)attraction
  48. physics

    In a television set, electrons are accelerated from rest through a potential difference of 18 kV. The electrons then pass through a 0.34 T magnetic field that deflects them to the appropriate spot on the screen. Find the magnitude of the maximum magnetic force that an electron...
  49. Science (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 30 kg object on the Earth? The acceleration of gravity is 10 m/s 2 . Answer in units of N What is the weight on the moon? Answer in units of N What is the mass on the ...
  50. physics

    Careful measurements of local variations in the acceleration due to gravity can reveal the locations of oil deposits. Assume that the Earth is a uniform sphere of radius 6370 km and density 5500 kg/m3, except that there is a spherical region of radius 1.7 km and density 944 kg...
  51. physics

    A block of mass 2.95708 kg lies on a friction- less table, pulled by another mass 3.23123 kg under the influence of Earth’s gravity. The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the tension T of the rope between the two masses? Answer in units of N ...
  52. Physical Science

    Find the change in the force of gravity between two planets when their masses remain the same but the distance between them is increased by 10 times.
  53. Physic 220

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 20.0 km, and 25.0° south of west. The second aircraft is at altitude 1050 m, horizontal distance 17.0 km, and 17.0° west of south. (a) Write the ...
  54. science

    a car with two passengers travelling at 15m/s collides with a tree. one of the passengers who is not wearing a seat belt strikes the windshield head first and comes to rest in 0.03 s. the area of contact between the head and the windshield is approximately 5 X 10 to the power ...
  55. physics

    An automobile having a mass of 1750 kg is placed on a hydraulic lift in a garage. The piston lifting the car is 0.244 m in diameter. A mechanic attaches a pumping mechanism to a much smaller piston, 1.50 cm in diameter, which is connected by hydraulic lines to the lift. She ...
  56. ALGEBRA

    Consider the following apportionment problem for College Town. Suppose each council member is to represent approximately 2,500 citizens. Use the apportionment plan requested in the problem, assuming there must be 10 representatives. North: 5,500 South: 9,000 East: 6,400 West: ...
  57. Physics

    A hiker starts at his camp and moves the following distances while exploring his surroundings: 65.0 m north, 2.00 ✕ 102 m east, 1.10 ✕ 102 m at an angle 30.0° north of east, and 1.50 ✕ 102 m south. (a) Find his resultant displacement from camp. (Take east...
  58. Physics

    Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west.
  59. Chem

    How would a Lewis Dot Structure be drawn for CO +1? I can't seem to get it to satisfy the octet rule and have the right number of electrons. How many electrons do you have? 1C = 1 x 4 = 4 electrons. 1O = 1 x 6 = 6 electrons. Total is 10 electrons. -1 electron because you have ...
  60. Science

    Thank you! Why is there a lunar eclipse only twice a year and not once a month? Thanks for the help. On the night of May 15/16 we will be able to see a total lunar eclipse. Lunar eclipses can only happen when the Moon is full and it passes behind the Earth and into its' shadow...
  61. PHYSICS

    a. A 25 nC particle and a – 7 nC particle is interacting with each other at a certain distance. Find the force between the two charges @ 3.0 cm and 1.0 cm Calculate and draw each of the particle’s electric fields. Calculate the electric potential values of the two ...
  62. Physics

    the wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find the magnitude and direction of the net external force on the sailboat.
  63. physics

    A canoe has a velocity of 0.39 southeast relative to the earth. The canoe is on a river that is flowing 0.59 east relative to the earth. Find the magnitude of the velocity of the canoe relative to the river. Find the direction of the velocity of the canoe relative to the river
  64. science

    a person moves 30m north, then 20m east and then 30(square root of two)m south west . His displacement from the original position is ?.
  65. physics 2014

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, and 23.0° south of west. The second aircraft is at altitude 1300 m, horizontal distance 17.8 km, and 18.0° south of west. What is the distance ...
  66. PHYSICS

    Two satellites A and B are in different circular orbits about the earth. The orbit speed of satellite A is three times that of satellite B. Find the ratio (TA/TB) of the periods of the satellite.
  67. SCIENCE

    1. Which of the following is an example of an environmental pressure? (1 point) the air pressure in the atmosphere a lake that is gradually running out of water a fight between two members of the same species breeding between two members of the same species 2. Which of the ...
  68. 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 standing on the ...
  69. physics

    The wind exerts a force of 280 N North on a sailboat, while the water exerts a force of 131 N West on the sailboat. How many degrees west of north is this net external force directed?
  70. Chemistry

    Shown below are several options for the box notations of the ground state electron configuration of the following gas-phase species. Identify the correct electronic configuration. i. Al2− ii. Mn (a)Select the reason that best explains why the first ionization energy ...
  71. calculus

    We know this is a piecewise function and we solved the first part, but we cannot figure out the other equation. A passenger ship leaves port sailing east at 16 mph. Two hours later, a cargo ship leaves the same port heading north at 12 mph. (a) Find a function giving the ...
  72. physics

    two boys start running straight toward each other from two points that are 100m apart,one runs with a speed of 5m/s while the other moves at 7m/s.how close are they to the slower one's starting point when they reach each other
  73. Social Studies

    What was demonstrated by the First Battle of Bull Run? 1. That the North would win 2. That the South was better trained than the North 3. That African American Soldiers would be useful to the Union Army 4. That that the war would be long My answer: 1. That the North would win ...
  74. physics

    A mass of 2.6 kg lies on a frictionless table, pulled by another mass of 4.7 kg under the influence of Earth’s gravity. The acceleration of gravity is 9.8 m/s2 .If the acceleration of the object has a magni- tude of 3.5 m/s2, what is the angle θ between the two forces? ...
  75. earth space science

    how are each of the air masses related and/or different from each other? Are you talking about the various layers of the atmosphere?
  76. astronomy

    Why could the mass of Venus not be deduced from Earth-based observations in the same manner as the masses of most other planets?
  77. Physics

    Trabuchet- A payload starts its motion from rest and travels connected to the rope for 2sec. Just before it starts flying, the payload is moving at an linear acceleration of 30 m/s^2 at a distance of 5m from the pole. Find how far the payload will land from where it left the ...
  78. integrated science

    Two individuals on roller blades push off each other.One weighs 45 kg and the other weighs 40 kg.who will travel further and why.Is the force balanced or unbalanced
  79. physics

    A pole-vaulter runs toward the launch point with horizontal momentum. Where does the vertical momentum come from as the athlete vaults over the crossbar?
  80. math

    Guy wires 80 feet long support a 65-foot tall telephone pole. To the nearest degree, what angle will the wires make with the ground?
  81. Geometry

    Guy wires 80 feet long support a 65 foot tall telephone pole. To the nearest degree, what angle will the wires make with the ground?
  82. Physics

    A firefighter of mass 73 kg slides down a vertical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10m/s2. What is the friction foce that acts on him? Answer in units of N
  83. k

    A pole-vaulter just clears the bar at 4.07 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3900 J. What is his weight?
  84. Physics

    A pole vaulter has 3500J of energy when he crosses a bar 7 metres high. How much kinetic energy will he have before he reaches the ground?
  85. science

    Granite is an igneous rock that forms from magma cooled below Earth's surface.Why would granite have larger crystals than igneous rocks formed from lava cooled above Earth's surface?
  86. math

    the distance from the sun to earth is about 1.5x10^11 meters. suppose light travels at a speed of 3x10^8 meters per second. About how long does it take light from the sun to reach earth? PLEASE HELP!!!
  87. physics

    Calculate the angular momentum of the Earth the arises from its spinning on its axis. Also calculate the angular momentum of the Earth that arises from its orbital motion around the sun. Please help I'm stumped on a take home test.
  88. Oceanography

    On a sunny day in an estuary, the surface irradiance is 1.6*10^17 photons cm^-2 s^-1. What is k if the irradiance is 7.3*10^13 photons cm^-1 s^-1 at 16 m depth? At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^-1. At what depth does the euphotic ...
  89. science

    movement of earth around sun and movement of moon around earth
  90. math

    the distance between 2 station A and B is 230 km .two car start simultaneously from A and B in the opposite directions and the distance between them after 3 houra is 20 km. If the speed of one car is less than that of the other by 10 km per hour, find the speed of each cars. (...
  91. science

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 850 m, horizontal distance 20.0 km, and 24.5° south of west. The second aircraft is at altitude 1100 m, horizontal distance 18.0 km, and 16.0° south of west. What is the distance ...
  92. Physics

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, and 22.5° south of west. The second aircraft is at altitude 1000 m, horizontal distance 18.0 km, and 18.0° south of west. What is the distance ...
  93. PHYSICS help!!!!!!

    An air-traffic controller notices two aircraft on his radar screen. The first is at altitude 850 m, horizontal distance 19.6 km, and 27.0° south of west. The second aircraft is at altitude 1100 m, horizontal distance 17.4 km, and 18.0° south of west. What is the distance ...
  94. physics

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 950 m, horizontal distance 19.9 km, and 23.5° south of west. The second aircraft is at altitude 1200 m, horizontal distance 17.4 km, and 22.0° south of west. What is the distance ...
  95. science

    wat causes an apple to fall down from a tree a pulling force towards the tree or a pulling force towards the earth
  96. Chemistry

    Choose the group from the given list: a) 1A b) 2A c) 3A d) 4A e) 5A The elements in this group are termed alkali metals. a b c d e nvm....choose the wrong question to post the question I wanted to post is: Choose the group from the given list: a) 1A b) 2A c) 3A d) 4A e) 5A ...
  97. Physics

    A 1500 kg car accelerates from rest under the actions of two forces. One is a forward force of 1260 N provided by traction between the wheels and the road. The other is a 870 N resistive force due to various frictional forces. Use the work-energy theorem to determine how far ...
  98. math/chem

    it is estimated that uranium is relatively common in the earth's crust, occurring in amounts of 4 g/metric ton. a metric ton is 1000kg. at this concentration, what mass of uranium is present in 1.0 mg of earth's crust?
  99. maths

    If the speed of light is 3x10^8m/s and the distance around the earth is 4.5x10^4 km and a plane could travel at half a speed of light, how long would it take for the plane to fly around the earth twice?
  100. Math

    A plumber's assistant's rate of pay is $0.75 per cubic foot of earth moved. He moves 220 cubic feet of earth to dig a trench. He moves the same amount to fill the trench. What is his pay for this job?
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