1. chemistry

    If you had one mole of pennies to divide among all the people in the world, how many dollars would each person receive? Use 5thousand as the population of Earth. how do you find how many pennies are in one mole?
  2. Science

    What could the relative age of two rocks tell you about them? a. One rock is 10,000 years old, and the other is 8,000 years old. b. One rock is older than the other. c. They both have fossils in them. d. One rock is closer to the surface than the other. What would a geologist ...
  3. Science

    What could the relative age of two rocks tell you about them? a. One rock is 10,000 years old, and the other is 8,000 years old. b. One rock is older than the other. c. They both have fossils in them. d. One rock is closer to the surface than the other. What would a geologist ...
  4. Science

    What could the relative age of two rocks tell you about them? a. One rock is 10,000 years old, and the other is 8,000 years old. b. One rock is older than the other. c. They both have fossils in them. d. One rock is closer to the surface than the other. What would a geologist ...
  5. science

    What could the relative age of two rocks tell you about them? a. One rock is 10,000 years old, and the other is 8,000 years old. b. One rock is older than the other. c. They both have fossils in them. d. One rock is closer to the surface than the other. What would a geologist ...
  6. physics

    a watermelon has a mass of 8kg and 600 g . how mich force of gravity of the earthwill it experience ?what will be its weight on the earth and the moo
  7. science

    an object being pulled to earth by gravity will have the force of air pushing back opposite directions
  8. physics

    A fence post is 52.0 m from where you are standing, in a direction 37.0 degree north of east. A second fence post is due south from you. What is the distance of the second post from you. If the distance between the two posts is 80.0 m?
  9. physics

    A fence post is 52.0 m from where you are standing, in a direction 37.0 degree north of east. A second fence post is due south from you. What is the distance of the second post from you, if the distance between the two posts is 80.0 m?
  10. Physics

    A fence post is 50.0 m from where you are standing, in s direction of 37.0 degree north of east. A second fence post is due south from you. What is the distance of the second post from you,if the distance between the two posts is 80.0?
  11. physics(online)

    Find the change in the force of gravity between two planets when distance between them is decreased by 12
  12. Physics

    Find the change in the force of gravity between two planets when the distance between them is decreased by a factor of 4.7
  13. chemistry

    Covalent bonds are formed when two atoms share electrons. The pairs of electrons which are shared between atoms and hence number of covalent bonds, can be represented by the number of lines drawn between the symbols for the atoms. For example, a single bond is represented by a...
  14. physic

    two point charges are placed on the x axis as follows: charge q1 = +4.00 nc is located at x = 0.200 m, and charge q2 = +5.00 nc is at x = -0.300 m what ae the magnitude and direction of the net force exerted by these two charges on a negative point charges q3 = -0.600 nc ...
  15. physics

    While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 260 m east, 195 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
  16. tsu

    While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 275 m east, 160 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
  17. physics

    While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 290 m east, 180 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
  18. physics

    While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 275 m east, 215 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
  19. physics

    While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 245 m east, 210 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
  20. physics

    While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 225 m east, 160 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
  21. sceince

    A student on roller blades traveling south with a force of 100 N collides with another student on roller blades traveling north with a force of 200 N. The net force is -100 N, but which student will go backwards? Why?
  22. Physical Science

    ok so i keep getting one wrong on a 4 question test and failing so can someone tell me what im getting wrong 1. What causes an electric current in a wire? A. Electric fields cause atoms to move in the wire. B. Electrons flow because of electrical attraction and repulsion. C. ...
  23. Physics

    What happens to the force between the charges if the distance between the charges is increased to two times its original value? Value of the force is increased by two. Value of the force is decreased by two. Value of the force is decreased by four. Value of the force is ...
  24. Philosophy

    True/False 1. Rosenstand argues that moral subjectivism is an intuitively sound, "live and let live" kind of moral position that is both appealing and socially cohesive. 2. For the members of the Flat Earth Society, who believe that all physical evidence of a round or ...
  25. Philosophy

    True/False 1. Rosenstand argues that moral subjectivism is an intuitively sound, "live and let live" kind of moral position that is both appealing and socially cohesive. 2. For the members of the Flat Earth Society, who believe that all physical evidence of a round or ...
  26. physics 2

    Three charges are placed on the y axis. One charge of -3.2 micro-Coulombs is placed at y = 0, another charge of +2.6 micro-Coulombs is placed at y = -0.29 meters, and another unknown charge is placed at y = +0.51 meters. The total force on the charge at y = 0 due to the other ...
  27. Mechanics & hydromechanics

    Find the magnitude and direction of the equilibrant of two forces, one being a horizontal pull of 18 N and the other a pull of 23 N at 50 degrees to the 12 N force.
  28. Mechanics & hydromechanics

    Find the magnitude and direction of the equilibrant of two forces, one being horizontal pull of 18 N and the other a pull of 23 N at 50 degrees to the 12 N force.
  29. Mechanics....Urgent!!

    Find the magnitude and direction of the equilibrant of two forces, one being horizontal pull of 18 N and the other a pull of 23 N at 50 degrees to the 12 N force.
  30. physics

    1) 2 spheres of equal diameters have 15 micro coulomb charge and -10 micro coulomb charge respectively. if they are placed 5cm apart what will be the force of attraction between them? 2) a charge of .5 micro coulomb is placed in an electric field whose intensity is 4x10^5n/c. ...
  31. physics

    Two spheres are mounted on identical horizontal springs and rest on a frictionless table, as in the drawing. When the spheres are uncharged, the spacing between them is 0.05 m, and the springs are unstrained. When each sphere has a charge of +1.6 £gC, the spacing doubles. ...
  32. statistics

    Three players enter a room. As each player enters, a coin is flipped (independently of the other players) and either a red or blue hat is placed on that player's head. The players can not see the colors of their own hats, only the colors of the other two players hats. Once ...
  33. Physics(Please help)

    Three forces act on a hockey puck as it slides across the ice, and it is in equilibrium. The force F is applied at the center and has a magnitude of 25 N. The force F1 is applied at the top edge, and F2 is applied half way between the center and the bottom edge. Find the ...
  34. Physics

    A 2.40 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 15.1 m/s. The vertical component of Earth's magnetic field in this region is 40.0 µT directed downward. Calculate the induced emf between the ends of the wire and ...
  35. physics

    a)The star ships Enterprise and Potemkin leave the Earth and travel in opposite directions each at 0.60c relative to an observer on Earth.In the Enterprise's frame of reference how fast is the Potemkin moving away? b) Through what voltage must you accelerate a proton so that ...
  36. Phys Science

    Good afternoon tutors..I need help on a few problems.Im really stuck.. 1) the space shuttle orbits at an altitude of approximately 200km above the surface of the earth. If the radius of the earth itself is 6380km, whats the acceleration de to gravity at the altitude of the ...
  37. physics

    You are explaining to a friend why the crew of the International Space Station feels weightless while orbiting the Earth. Your friend responds that he thought gravity was just a lot weaker up there. Show that it isn’t so by calculating the acceleration due to gravity 350 km ...
  38. physics

    Two point charges are placed on the x axis as follows: Charge q1= +4.00 nC is located at x= 0.200 m, and charge q2= +5.00nC is at x= -0.300 m. What are the magnitude and direction of the net force exerted by these two charges on a negative point charge q3= -0.600 nC placed at ...
  39. science

    how the earth rotates by itself? Momentum imparted to it million of years ago when the solar system formed. One theory involves glancing collision with a large asteroid millions of years ago that also broke off material that eventually developed into the moon. I hope this ...
  40. Physics

    a particle (C) of mass m = 0.2 kg can slide without friction on an inclined plane making an angle alfa (a) = 30 degrees with respect to the horizontal (aka ground) . (C) is launched at at an instant to=0 along a line Ox of greatest slope with an initial velocity of Vo =5 m/s...
  41. Science HELP

    Although the Amazon Basin receives more than 80 inches of rain per year, South America also has the driest place on Earth, known as A. Death Valley. B. Gobi Desert. C. Atacama Desert. D. the Caribbean.
  42. physics

    Your friend weighs 145 lb. What is her mass in kilograms if she went to the moon where the acceleration of gravity is 1/6 that on earth? i know that her weight in newtons is 652.5, and that her mass in kilograms is 65.25, and that her weight in newtons if she went to the moon ...
  43. calculas

    find the perimeter of the rectangle with maximum area that can be inscribed in a semicircle of radius 2 ft. if two of its vertices are on the diameter of the semicircle and the other two are on the semicircle.
  44. Finding a Formula, help please !

    Does anyone know the formula to find any point between two other given points in a line? Please, and thank you! The mindpoint formula xm= _(x1 + x2) /2 ym = (y1 + y2) /2 This give the midpoint (xm, ym) between the points x1,y1 and x2,y2 Thanks for the tip, but I was wondering ...
  45. Geometry

    Imagine that all the people on Earth could stand side by side together. How much area would be needed? Would all the people on earth fit in Rhode Island? Explain your reasoning. Rhode Island, the smallest state in terms of area, has a land area of 1000 square miles. Assume ...
  46. Physic please check

    A house has a floor area of 119 m2 and an outside wall that has an area of 32 m2. The earth's magnetic field here has a horizontal component of 2.1 x 10^-5 T that points due north and a vertical component of 5.0 x 10^-5 T that points straight down, toward the earth. (a) ...
  47. essay

    I need to come up with an outline for a essay on the differences between the North usa and South? Any ideas? Thanx if u can help
  48. world geography

    the united state has both the wettest and direst places on earth.the wettest is hawaii and the driest is death valley,california.is that means that south america does not has both
  49. SS

    What are the similarities between Africa north of the equator and south of the equator?
  50. science

    During space flight, astronauts often refer to forces as multiples of the force of gravity on Earth's surface. What does a force of 5g mean to an astronaut? If Earth were twice as massive but remained the same size, what would happen to the value of g? http://hyperphysics.phy-...
  51. Math

    A pole vaulter cleared the bar at 490 cm. Convert 490 cm to meters using a unit multiplier
  52. math URGENT!!

    a rectangular box measures 4 by 5 by 2 meters. what is the length of the longest pole that can fit into the box?
  53. Physics

    An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 41 steps at an angle 45∘ north of east, then 81 steps at an angle 60∘ north of west, then 49 steps due south. Assume his steps all have equal length. Save him from becoming hopelessly ...
  54. earth

    The global-mean surface temperature of the earth is about 288 degrees Kelvin. Use the Stefan-Boltzman law to calculate the radiative flux corresponding to an object with this temperature. [hint: use σT4 with σ = 5.67x10-8 Wm-2K-4 ]
  55. physic

    Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm.
  56. physics

    Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm.
  57. physics

    The power output in the sun is about 4.00 x 10^26W. (a). Calculate the power per unit area (intensity), in kilowatts per square meter, reaching Earth's upper atmosphere from the sun. The radius of the Earth's orbit is 1.5 x 10^11m.
  58. Calc

    A cylindrical slime tank is placed so that the axis of the cylinder is horizontal. Find the fluid force on a circular end of the tank if the tank is half full, assuming that the diameter is 6 feet and the slime weighs 54 pounds per cubic feet?
  59. History

    This was one of my few questions that i was struggling with. A) Describe the growth of North American slavery from 1619 to 1789. Include the status of the first Africans in North America, laws later established to govern them, and the reasons why planters switched from a labor...
  60. geography

    Bolivia is one of two land locked countries in South America. What is the name of the other country? Looking on a map it looks to be Paraguay. Is that correct?
  61. physics

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

    Many people know that the weight of an objectvaries on different planets,butdid you know that the wieght of an object on earth also varies according to the elevation oj an object.in particualr ,the weight of an equation follows this equation:w=cr -2 squared, where c is ...
  63. science

    a body is pulled towards the west by the force of 10N making an angle 30 degree with the south. What are the magnitude of the south and west direction component of the force?
  64. physics

    Find the total displacement of a mouse that travels 1.0m north and then 0.8m south.
  65. World Geography

    REVIWE 1.Using up resources is one of the negative effects of A. the birth rate. B. the death rate.<<<<<<<<< C. the infant mortality rate. D. rapid population growth. 2. The Prime Meridian and other imaginary north-south lines measure A. longitude.&...
  66. physics

    While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75.0 m north, 250 m east, 116 m at an angle 30.0° north of east, and 200 m south. Find the resultant displacement from the cave entrance.
  67. Electrical Circuits

    find the number of free electrons in a copper conductor having a diameter of 0.064 in. and a length of 1000ft.
  68. Physics

    Two movers have to life a refrigerator onto a truck. One of the movers wants to lift the refrigerator vertically, but the other mover wants to roll it up a ramp by applying a force parallel to the ramp. Assume the height of the truck is 1.5 m, the length of the ramp is 5.0 m, ...
  69. 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 down, reaches the peak ...
  70. Physics

    A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 4.6×10−5 rad. 1. What diameter spot will it make on the Moon?
  71. Physics

    The gravitational force between two students is 3.20 x 10^-8N if one student has a mass of 50,0kg and the other has a mass of 60.0kg, how far apart are the students sitting?
  72. Physics

    How far above the surface of the Earth does an object have to be in order for it to have a weight which is 0.53 times the same weight as it would have on the surface of the Moon? (Ignore any effects from the Earth's gravity for the object on the Moon's surface or from the Moon...
  73. Language Arts

    "I'd wash the Amazon river and clean the oily Carib & Gulf of Mexico, Rub that smog off the North Pole, wipe up all the pipelines in Alaska, Rub a dub dub for Rocky Flats and Los Alamos, Flush that sparkly Cesium out of Love Canal" In this excerpt, Ginsberg uses repetition to ...
  74. math

    You start a search for a buried object by marking the center of a field as (0, 0), with coordinates giving distances in yards. Coordinates to the north or east are positive, and coordinates to the south or west are negative. You find nothing at (–5, 3), so you try a likely ...
  75. Physics

    Supposed a skydiver ( mass=75kg ) is falling toward the earth. When the skydiver is 100m above the earth he is moving at 60m/s. At this point calculate the skydiver: Gravitational potential energy Kinetic energy Total mechanical energy
  76. physics

    A constant force is applied to an object that causes a certain displacement. If the angle between the between the force and the displacement is 146 deg, then the work done by this force is A) zero B) not enough information given C) positive D) negative not sure how this is ...
  77. Social Studies (Please read this)

    Please just make sure that my information is right and it is grammatically correct. Thank you! In 1965, Congress adopted the Voting Rights Act. Describe this act. In our description, explain what led Congress to pass the act, and describe at least two of the act's effects. The...
  78. math

    An 18 kg mass is placed st one end of a steel bar that is 1 m long. A 35 kg mass is placed at the other end. Where should the fulcrum be placed to balance the bar?
  79. science

    Given that Antarctica is roughly semicircular with a radius of 2000 km and has an average ice thickness of 3000 m. a) How many km3 of ice does Antarctica contain? b) Assuming all the ice melts, how much will this raise sea level (ignoring that the Earth has curvature and ...
  80. trig

    Lindsay is out one night and notices that her body casts a shadow that is 1.8m long when she is standing 5mfrom the pole supporting a street light Lindsay is 1.5m tall. 1-what is the angle of elevation to the street light ? 2- how high is the street light
  81. trig

    Lindsay is out one night and notices that her body casts a shadow that is 1.8m long when she is standing 5mfrom the pole supporting a street light Lindsay is 1.5m tall. 1-what is the angle of elevation to the street light ? 2- how high is the street light
  82. physics

    1. Two point charges are separated by 6 cm. The attractive force between them is 14 N. Find the force between them when they are separated by 12 cm. 2. The SI unit of mass is the kilogram. What is the SI unit of charge? 3. The proportionality constant k in Coulomb’s law is ...
  83. physics

    Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . When a horizontal force of 340 is applied to a 68.0 box, the box slides on a level floor, opposed by a force of kinetic friction of 150 . Part A What is the magnitude of the acceleration ...
  84. Physics

    Consider the following four possibilities for two point charges and choose the one(s) that do not change the magnitude of the electrostatic force that each charge exerts on the other: A. Double the magnitude of each charge and double the separation between them. B. Double the ...
  85. Physics

    Two 2.46uC point charges are located on the x axis. One is at x = 1.01m, and the other is at x = -1.01m. Determine the electric field on the y axis at y = 0.455m & Calculate the electric force on a -2.82uC charge placed on the y axis at y = 0.455m I'm using E=kq/r^2 and F=kqq/...
  86. c++

    Distance between two 3-D points. Given two points in space (3-dimensional), find the distance between them. The user will input the coordinates (x,y,z) of the two points and your program will calculate and display the distance between the points.
  87. Astronomy - Physics

    Finally, we will look at a system that is in an orbit comparable to the Earth to see how the angle that the light strikes the surface and the length of day contribute to the total amount of energy that we receive from the Sun at the two solstices. Recall that the changing ...
  88. physics

    Two charged bodies exert a force of 0.390 N on each other. If they are moved so that they are one-third as far apart, what force is exerted? is it .390 times 3??
  89. physics

    4 packets of charges are arranged in a circle. Each packet is 90 degrees from each other. Each packet consists of 22 elementary charges associated with the nucleus of two sodium atoms. A test charge is placed in the center of the circle of packets. The distance between the ...
  90. math

    A council consists of 10 members.four are NDC,three are NPP and three are from other parties.if a committee of three is to be selected,find the probabilities following: I.one of each party. II.Two NPP and one from other parties. III.one from other parties and two NDC (base on ...
  91. Physics

    PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h
  92. Physics

    PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h
  93. MATH!

    To get from his high school to his home, Jamal travels 5.0 miles east and then 4.0 miles north. When Shelia goes to her home from the same high school she travels 8.0 miles east and 2.0 miles south. What is the measure of the shortest distance, to the nearest tenth of a mile, ...
  94. Physics

    Four identical masses of mass 900 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of the net gravitational force on one of the masses, due to the other three?
  95. Rocks

    What could the relative age of two rocks tell you about them? a. One rock is 10,000 years old, and the other is 8,000 years old. b. One rock is older than the other. c. They both have fossils in them. d. One rock is closer to the surface than the other. What would a geologist ...
  96. Physics

    Two electrostatic point charges of +60.0 uC and +50.c uC exert a repulsive force on each other of 175 N. What is the distance between the two charges? So let's say I use Coulomb's law would the repulsion of 175 N be considered the equivalent of the electric force? Can someone ...
  97. PHYSIC 220

    A ferryboat transports tourists among three islands. It sails from the first island to the second island, 4.38 km away, in a direction 37.0° north of east. It then sails from the second island to the third island in a direction 76.5° west of north. Finally, it returns to the...
  98. main ideas

    Scientists generally agree that Earth is getting warmer due to what's called the greenhouse effect. A greenhouse used for plants stays warm because sunlight and heat coming through the glass roof are mostly trapped. The heat doesn't radiate back into the atmosphere because it'...
  99. Grade 12 physics

    At the beach, 3 children pull on a floating toy. Child 1 plus with a force of 15N [N 24°E], child 2 pulls south and child 3 pulls west. The net force of the toy is zero. Assume that there are no other significant forces acting on the toy. a) Calculate the magnitude of the ...
  100. Physics HELP!!

    A loudspeaker is placed between two observers who are 113m apart, along the line connecting them. If one observer records a sound level of 51.8dB and the other records a sound level of 75.8dB, how far is the speaker from each observer? Enter the longest distance first.
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