a bristlecone pine in the white house usually adds a new ring when which of the following occurs? a. earths daily rotation is complete b. the full moon causes a monthly high tide c. the new moon is visible from earths surface d. earths northern hemisphere is titled toward the ...
  2. Science
    What does the Hertzsprung-Russell Diagram NOT plot? A. temperature and mass B. spectral class and absolute magnitude C. absolute magnitude and luminosity D. spectral class and temperature Is it B?
  3. Science and Hurry!
    The Gulf Stream current shown here makes the waters of the North Atlantic A) warmer. B) cooler. C) more dense. D) less nutrient rich.
  4. Earth Science
    Slide 1 This is a cumulus cloud. Can you find four things on the word list that you can use to describe this cloud. Cumulus clouds consists of puffy tops, no rain expected, 3,000 ft. high, and flat bottoms. Slide 2 This is an example of towering cumulus clouds. Write down as ...
  5. Science and Hurry!
    How do ocean currents influence the climate of a place? A) They transport heat over large distances, affecting the wind that blows over the land. B) They bring cold water from the poles, reducing the temperatures along the coasts. C) They draw out moisture from the wind, ...
  6. Science and Hurry!
    What causes land breeze and sea breeze? A) The differential heating of land and sea by the Sun results in the movement of air. B) Hot air from the sea blows over the land because there is a high pressure area over the sea. C) Cold air blows from the land over the sea because ...
  7. science
    What can people do to reduce global warming?
  8. science
    10. Which of the following is an effect of global warming? A) increased drought B) falling sea levels C) decreased coastal flooding D) glacier spreading
  9. science
    what causes clouds to form?
  10. science
    weather maps use isobar lines to show weather conditions. what is indicated by this?
  12. physical science
    A 15kg piece of mass suspended from a hook in the ceiling is pulled aside by a horizontal string until the supporting string makes an angle of 30 with the vertical .draw a vector diagram showing all the force acting on the piece of mass
  13. Science, please! help!
    1. How does sea-floor spreading occur? a.New materials are being added to the atmosphere. b. Earthquakes break apart the ocean floor. c. Sediments accumulate at the area of spreading. d. Molten material beneath Earth's crust rises to the surface. 2. Which feature form the ...
  14. Science
    Heat and pressure deep beneath the Earths surface can change any rock into A) chemical rock B) gemstone C) metamorphic rock D) sedimentary rock
  15. Science, Health
    Are calories the only difference between eating 100g of chips and skittles vs. eating 100 g of fresh fruit? What are some other things that you think should be considered?
  16. Social studies
    Why the scientific method is better than Aristotelian science and divine Biblical knowledge..? about Galileo on Trial
  17. science
    what is the humidity level of the dew point?
  18. science
    what happens to air temperature as altitude increases?
  19. science
    What the lines making a circle around the high-pressure area indicate. please sombody help
  20. science
    if there is a low pressure area developing over warm water, what type of storm is most likely to form?
  21. science
    Compare lunar and solar eclipses and answer the following questions: How does a solar eclipse happen? How does a lunar eclipse happen? Which one occurs more often?
  22. Science
    When the North Pole is tilted toward the Sun, which hemisphere will have the summer season? Northern Hemisphere - June
  23. science
    Which of the following is a reason to use parallel sentence structures in a literary analysis essay?
  24. Science
    Lead(ll) Iodide can be produced from the reaction of Lead(ll) nitrate and potassium Iodide.What mass of lead(ll) iodide is produced when 50.0 mL of each solution is combined,forming a 0.750 M Solution of potassium nitrate? Please help me to solve this problem thank you
  25. Science
    An insect of mass 20g crawls from the centre to the outside edge of a rotating disc of mass 200g & radius 20cm. The disc was initially rotating at 22.0 rad/s. What will be it's final angular velocity? What is the kinetic energy in the system?
  26. Science
    A truck of mass 2000kg moving on a highway experiences an average frictional force of 800N. If it's speed increases from 25m/s to 35m/s over a distance of 500m what is the force generated by the truck .
  27. Science
    A bullet of mass 20g, travelling at a speed of 350m/s, strikes a steel plate at an angle of 30° with the plane of the plate. It ricochet off at the same angle at a speed of 320m/s. What is the magnitude of the impulse that the steel plate given to the projectile? If the ...
  28. Science
    A box of mass 50kg is placed on an inclined plane. When the angle of the plane is increased to 30°, the box begins to slide downward. Calculate the coefficient of statics friction b/w the plane and box . Draw the free body diagram .
  29. Science(chemistry)
    Some students believe that teachers are full of hot air. If I inhale 2.2 litres of gas at a temperature of 18 degree Celsius and it heats to a temperature of 38 degree Celsius in my lungs,what is the new volume of the gas?
  30. science
    determine the number of grams of NH4CL that will dissolve in 100 grams of water at 25 Celcius.
  31. Science
    What is a cation?
  32. Science
    what are the similarities between thermal energy and electrical energy
  33. Physical Science
    A delivery man pushes the button to ring the doorbell. Which of the following forms of energy is not involved in this process? electrical sound mechanical gravitational my answer is gravitational
  34. Science
    describe what happens, at the molecular level, during melting.
  35. science
    calculate the maximum height?calculate how long ? land on the ground?
  36. Science 6
    Renny noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform tricks. How did the oil help? A:The oil reduced friction between the moving parts of the skateboard. B:the oil increased the friction between the moving parts of the ...
  37. Science
    A 60-kg cheetah reaches a speed of 30m\s as it chases its prey. What is the kenetic energy of the cheetah?
  38. Physical Science
    An elephant drags a tree trunk along a rough horizontal surface by means of an attached rope which makes an angle of 30° with the horizontal. The force in the rope is 4 000N. CALCULATE the horizontal component of the force exerted by the rope on the tree trunk
  39. Science
    How many grams of ammonium nitrate nedd to be added to 500g of water so that the freezing point becomes -8.3 °C?
  40. Physical Science
    Like water, hydrogen fluoride, HF, and ammonia, NH3, have relatively high boiling points. Explain. A.The polar molecules of each of these materials have relatively strong attractions for themselves, which translates to relatively high boiling points. B. Since these molecules ...
  41. Physical Science
    If an element has a +1 positive charge and the following chemical symbol, how many electrons does it have? 17 on top, 6 on bottom, Oxygen (O) A. 7 B. 17 C. 5 D. 18
  42. Physical Science
    Why is metal shiny? A. The electrons absorb each light wave. B. The loose electrons reflect most wavelengths of light. C. The electrons emit light due to electronic excitation. D. The electrons transmit most wavelengths of light. (I think the answer is B, but I am not positive)
  43. Science
    Plants use nutrients that_______ adds to soil. 1.bedrock 2.sand 3.loom 4.humus I think it's humus.
  44. Science!
    What changes would a cold front bring to a warm, dry area? A)extended period of rain B)several gray skies C)dry and asunny skies D)rain or thunderstorms I think it is either a or d but I am leaning more to a, so please help!
  45. science
    a body moving with an inertia velocity of 30m/s accelerate uniformly at a rate of 10m/s until it attends a velocity of 50m/s.what is the distance covered during this period?
  46. Science/Weather
    Satellite images help meteorologists in all the following ways except: a) monitoring changes in the strength of storms b) locating areas of high and low pressure systems. c) predicting rainfall amounts d) recording daily high and low temperatures. I think the answer is c or d...
  47. science
    What is the percent mass of calcium in a calcium supplement if 1.28-g of calcium carbonate is extracted from a 2.72-g pill?
  48. science
    A body starts from rest, the ratio of distances travelled by the body during 3rd and 4th seconds is -
  49. Science
    A pool ball leaves a 0.6 m high table with an initial horizontal velocity of 2.4 m.s.calculate horizontal and vertical velocity and time taken for the pool ball to fall to the ground
  50. Science
    To what temperature must a given mass of Nitrogen at zero degree celsius be heated to double its volume and pressure?
  51. science
    Jane can still pump air in the party balloon even through it is already inflated.What explains this phenomenon?
  52. Science
    1) How does the pH of a solution affect its solubility and structure of weak organic acids and bases, such as proteins and nucleic acids? 2) Why would a zipper or a Velcro strip be a good analogy to weak interactions between biological molecules? Thank you!
  53. science
    why did scientists think that proteins were the genetic material and not nucleic acids?
  54. Science
    What is the molar concentration of water in a solution of 10mM glucose? What types of ions are formed when water dissociates at room temp? Thank you!
  55. Political Science
    What are some pros and cons to privatizing the U.S Postal Service?
  56. Science
    How does a non metal behave chemically? Gimme an example
  57. Math
    Suppose 3 student change their vote from math to science describe how the frequency gable would change
  58. math (Ms. Sue plz help)
    Plz help my dad dose have time for me my mom die when i was a little girl plz do help me and i am not lieing a 4x4 grid with 5 blocks shaded (1 point) one over five, 25% *** five sixteenths, 31.25% one over four, 20% one over four, 25% 2. Model 32% on a 5 × 5 grid. (1 point) ...
  59. Science
    1. True or False: If the net force of an object is 0 N, the forces are considered unbalanced. A.)True B.)False** 2. Most people in the United States use feet and miles to measure distance in their everyday lives. Why do scientists in the United States use meters to measure ...
  60. Honors Physical science
    Lesson 13 force and motion unit test. I need 1-62
  61. Science
    How much work is done in moving a 25lb. load a distance of 7 feet?
  62. Science
    The force of gravity of objects on the moon is approximately one-sixth of their value on Earth. Joe's weight on the moon is 124 N. What will Joe's mass on Earth be?
  63. Science
    A box weighing 20lb. is being pushed up an incline. If the angle of incline was 90° to the ground, what effort would be needed to push the mass? I don't get how to get the effort if an angle was in the problem.
  64. Science
    The force of gravity of objects on the moon is approximately one-sixth of their value on Earth. Joe weighs 7633 N on earth. What will Joe's mass on the moon be?
  65. Science
    although electromagnetic waves differ in the wavelengths they all travel at the speed of light which is A.300,00km/s B.6000km/h c.100km/s d.10,00km/s A rocket is a motor that can urn fuel without requiring A.water B.air c.electricity d.fire
  66. Science
    Teachers need a better way to give feedback to students. Writing on everyone's paper takes a lot of time,even though it is effective. Students and teachers need a better way.
  67. Science
    Five criteria for decision making matrix "teachers need a better way to give feedback to students."
  68. Science
    When sodiun is placed in water,it reacts violent to produce hydrogen gas and form sodium hydroxide solution. write a balanced chemical equation for this reaction
  69. Science
    Why the bulb glows when the electric current passes through it?
  70. science
    does condensation or evaporation occur on a cold can of juice is put on the table on a hot day
  71. Science
    Which of the following forces causes a feather to fall slower then a bowling ball? A.gravity B.rolling friction C.sliding friction D.air resistance
  72. Science ms sue please help
    Must new substances be formed when you observe a chemical property? My answer is no because you are just observing. There is no reaction taking place. I don't know if my answer is correct.
  73. Science
    Must new substances be formed when you observe a chemical property?Explain.
  74. Science
    What effect does observing a substance's physical properties have on the substance?
  75. Science
    Why do automobiles rust more easily in wet climates than dry climates?
  76. Science
    If you let all of the liquid evaporate out of the pitcher, would you be able to see the solid particles of the drink mix? Explain.
  77. Science
    If one sound registers one decibel more than another, then it is ____ times as intense? Round your answer to three decimal places.
  78. science
    The Sun is unusual because it does not belong to a ____ ? A) solar system B) universe C) galaxy D) binary star system I think the answer is D but I'm not 100% positive.
  79. Social Studies nhf
    Thank you! BTW, nhf stands for need help fast :) thank you again in advance!! All right! So, I have a few essay questions I want to make sure are right! This is really important to me and I am not that good in science. Please help me!! Here goes everything! (6 points) 1. ...
  80. Science
    The African plate is moving toward the Eurasian plate at a rate of a few centimeters per year. How will this area change in 100 million years? In your answer, consider how continents will change and how the Mediterranean Sea will change. I was trying to click on your link but ...
  81. Science
    The African plate is moving toward the Eurasian plate at a rate of a few centimeters per year. How will this area change in 100 million years? In your answer, consider how continents will change and how the Mediterranean Sea will change.
  82. Science
    A geologists working in a national park finds a mineral he is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe how the geologists can use these items to determine some of the minerals characteristics.
  83. Science
    Which of earth's spheres contains mountains,valley's, and other landscapes?
  84. science
    Tom is marking the locations of active volcanoes on a world map. Explain how the locations of the volcanoes are related to Earths plates. can you please explain this to me, I don't understand....thx
  85. SCIENCE asap :P
    Twice a year on Earth, the number of hours of darkness is equal to the number of hours of sunlight. These events, where both day and night are 12 hours, are the spring and autumn equinoxes.Which of these describes the orientation of the sun and Earth on these two days? A.Earth...
  86. science
    How do you make a 10 ml buffer with 8M urea (mol. weight 60.06g/mol)
  87. Science
    Discuss ways in which the environmental health hazard can impact negatively on human health
  88. science
    Find flux density if area is 1mWb and area 1inch^2
  89. Science
    Describe how fans in a sporting stadium would need to move to create a transverse wave and a longitudinal wave
  90. science
    A galvanometer of resistance 100  gives full scale deflection at 10 mA current. What should be the value of shunt so that it can measure a current of 100 mA?
  91. Science
    1) If you let all of the liquid evaporate out of the pitcher, would you be able to see the solid particles of the drink mix? Explain. 2)Compare what happens when a geyser erupts to what happens when a tea kettle whistles. 3)Name something made of aluminum and explain why ...
  92. science
    Explain the differences between internal and external fertilization and the advantages and disadvantages of each reproductive strategy.
  93. Earth Science
    1. We start with 400 atoms of Uranium-238. How many remain after 4.5 billion years? _______ After 9 billion years? _______ After 13.5 billion years? ________ 2 . How long will it take for ½ of the original amount of Rubidium-87 to decay? _______ 3. Carbon-14 has a half-life ...
  94. Science---Hurry Please Help!
    What do the lines making a circle around the high-pressure area indicate? A) Areas of equal pressure B) Areas of equal altitude C) An occluded front D) A stationary front
  95. science
    how should each form of energy be identified? A) energy A:gravitational energy /energy B:chemical energy B) energy A: nuclear energy/ energy B: electrical energy C) energy A: electromagnetic energy energy B:sound energy D) energy A: mechanical energy /energy B: thermal energy
  96. science
    what similarities do nuclear energy and chemical energy share? select all that apply. A) both are types of kinetic energy B) both are types of potential energy C) both involve magnetic energy D) both involve stored energy please help! anybody just anybody!
  97. science
    1. what occurs as the convection current moves toward the upper mantle density increases density decreases temperature increases temperature decreases 2. what occurs as the convection current moves toward the lower mantle (same options as #1)
  98. Science
    Ammonia is used as a refrigerant not ph3 why...?
  99. Effective Learning Environment
    Which would be an important consideration for developing a preschool classroom? A. Unlike kindergarten children, children at this age don't participate in long-term projects, so they don't need storage for longterm work. B. You won't need a science or math center since ...
  100. Science physics
    A uniform metres rod of weight 100N carries a weight of 40N and 60N suspended from the 20Cm and 90cm marks respectively, where will your pivot a knife edge to balance the rod.
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