1. Science
    I answered the questions, but I don't know if my choices are right. 1) Which of the following is an acidic pH? 6 7 8 800 None of the Above Answer: 6 ------------------------------------- 2) Which of the following is directly produced by photosynthesis? Glucose and oxygen ...
  2. science chemistry
    Calculate the relative atomic mass of Limestone CaCo3 Methanol CH3oH Sulphric acid Ca(No3)2. (Ca=40.1,C=12,O=16,H=1,S=32).
  3. Genetics (science)
    Please answer my science question (in detail if possible) Q: in rats the gene for black hair colour is dominant over the gene for brown hair colour. Draw a plunnet square and use it to predict the fractions of both the genotypes and phenotypes produced when two heterozygous ...
  4. Science
    hi could you please help with the following question: In humans, free ear lobes is dominant to attached ear lobes. A male who is pure breeding for free ear lobes marries a woman who is pure breeding for attached ear lobes. What type of ear lobes will the children. (Including a...
  5. science
    Which statement is true regarding nuclear energy
  6. Science
    A switch is closed, a lamp turns on. The switch opened, and the lamp turns off. What does that suppose to mean..?
  7. Science
    A parallel connection of several lamps in a home allow you to control each lamp independently with switches. How is this possible?
  8. science
    I'm doing a lab for Le Chatelier's Principle. I'm concerned that all my answers sound very similar. Can someone help me and let me know if my answers are making sense? ~Thanks 1.) How is the reaction Zn(OH)2 <=> Zn^+2 + 2OH- affected by adding OH- I think since we are ...
  9. Science
    A liquid solution of formaldehyde is 37% pure. This solution has a specific gravity of 1.037. The molecular weight of formaldehyde is 30.0. To 1.00 ml of this impure stock solution is added quantity sufficient total the total volume to 500 ml. If 1.00 ml of this solution is ...
  10. Science, Physics
    Concave mirrors can be used as for shaving or applying make up. The face must be inside the focus. You hold a concave mirror, with a focal length of 40 cm, about 30 cm from your face. Where is your image located? How much bigger than your face is the image?
  11. science
    7th Grade Sarah heated two cubes of aluminum to 50oC. Cube A has a volume of four cubic centimeters. Cube B has a volume of two cubic centimeters. If the cubes do not touch each other, which of these statements is true?
  12. food science
    A sample of grain in a bin is at 80.6 degrees F. The vapor pressure of water in the bin is 17.09 mm Hg. Assuming that the grain is well mixed, is the grain in danger of fungal growth and mycotoxin production?
  13. Science
    1. Which type of weather technology often carries cameras that can make images of Earth's surface, clouds, and snow cover? A. weather balloon B. weather satellite**** C. computer D. automated weather station 2. Why are weather forecasts more reliable now compared to hundreds ...
  14. environmental science
    what are the two main factors that determine where organisms live?
  15. science
    Are there any websites that explain Mendelian genetics and show how to solve such problems in an easy, concise manner at an AP Bio level? Thank you
  16. Science
    When is allergy season? Is it during the Spring?
  17. Science
    what is the distance above Earth's surface?
  18. Science
    the energy an object has due to it's motion is called a what?
  19. science- punnet square
    If both parents have freckles but one of their children do not have freckles (ff). What are the geno types of the parents? Use the punnet square to help you. so since the child doesn't have freckles the geno type of the parents must be mother Ff and father Ff F f F FF Ff f Ff ...
  20. Science
    Explain the process of filtering blood
  21. science
    Which of these compounds would you expect to have the highest melting point: C2H6,CL2,AsCL3, BaBr2? Explain your answer
  22. science
    Calculate the concentration of all species in a 0.145M solution of H2CO3
  23. Science
    What is a good experiment that shows light traveling in straight line until it hits a new medium?
  24. Physical Science
    3. What is the cracking and reforming? For what purposes are either or both used by the petroleum industry?
  25. Acrostic Poem Science!!
    Sodium!! S- O- D- I- U- M-
  26. Science
    A scientist is trying to determine the identity of an element. It is highly reactive in water and forms an ionic bond with chlorine. It is also very shiny. The element is most likely A)from group 17 B)from group 1 C)from group 15 D)a noble gas Mrs. Sue Is it C?
  27. Science
    Which is most likely to be part of an ionic bond? A. An atom with no valence electrons B. An atom with one valence electron C. An atom with two valence electrons D. An atom with three valence electrons I think it is B.
  28. Science
    Which of the following is a pure substance? A. Chocolate milk B. Orange Juice C. Seawater D. hydrogen peroxide (h202) is the answer C.
  29. Education
    What is the most appropriate reason for having learning centers in the science classroom?
  30. science
    In which of the following statement the word light year is used correctly? (A) Ceres dwarf galaxy is 2.46 million lightyear away from us.(B) light travels with the speed of 1 lightyear in the universe (c) the next complete solar eclipse will be seen after 32 light year. (D) ...
  31. Science
    What kind of substance has properties that reflects light very well, warms up in my hand, flattens out when it hits with a hammer and conducts electricity?
  32. science
    you are given a 1kg trolley and a trolley of unknown mass.explain how the mass of unknown . Explain how the mass of the known trolley can be determined if a mass-meter scale is not available
  33. Science
    A horizontal force of 24 N is being applied to a box on a level surface. The box is accelerating at the rate of2280889against a frictional force of 14 N. What is the mass of the box?
  34. Science
    What is a four-cell battery with the cells connected in series with each other? How would it look like?
  35. science help
    a 2500kg car moves at 15m/s 2; 15m/s2 is the __________ of the car
  36. Science
    When a football is kicked into the air, it has a velocity of 32m/s at an angle of 25º. At the very top of the ball’s path, what is it's vertical velocity?
  37. science
    air masses that form over land are moist true or false
  38. Science Help
    A projectile is launched at 15 degrees and it's landing height is the same as the launch position. If this is true, then at what other angle can the projectile be launch to achieve the same horizontal displacement?
  39. science
    Describe what happens to the electricity produced at 25kV by a power station when its transmitted to a house at 230 V many miles away.
  40. Science
    A dicot seed is preferred over a monocot seed to observe seed structure because? a.Distinct embryonic axis or b.Proper sepration of cotyldeons
  41. science
    What is the mass of air in a room meauring 30 cubic meters if the density of air is 1.3kg per cubic meter?
  42. Science
    fus = 12.5 and vap = 93.2 both j/k x mol Determine the entropy change when 7.30 mol of HCL(g) condenses at atmospheric pressure. my first answer was -91.3 but it keeps telling me that is incorrect and that delta Svap if scaled at 1.00 mol but needs to be scaled to 7.30 mol ...
  43. science
    3.A weather station is located 300 miles directly east of a second station. Winds at the eastern station are blowing from the south. Winds at the western station are blowing from the north. What is true about the weather system near these two locations? A. A high-pressure ...
  44. science
    The passageway that takes air from your throat to your lungs is called the pharynx*** larynx alveoli trachea
  45. SCIENCE(CHEMISTRY)
    calculate the mass of silver deposited when a current of 2.6a is passed through a solution of a silver salt for 70mins ag=108,1 faraday 96500
  46. Science
    Which of the following may have happened if the inner planets had greater masses during the formation of the solar system? A. The inner planets may have been even smaller and rockier. B. The inner planets may have been larger and more gaseous. C. The inner planets may each ...
  47. science
    Calculate the average speed of a water molecule (with a mass of 3.0e-26 kg) on the surface of Venus (730 Kelvin).
  48. Science
    Which of the following planets is considered a rocky, or terristrial, planet? A. Venus B. Neptune C. Saturn D. Uranus Is the answer A? Thank you
  49. Science
    Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?
  50. science
    How many sex chromosomes are found in the reproductive cells of human being?
  51. science
    A charge of +9.0 nC and a charge of +4.0 nC are separated by 50.0 cm. Find the equilibrium position for a −1.0 nC charge as a distance from the first charge. The Coulomb charge is 8.98755 × 109 N · m2 /C 2 . Answer in units of cm.
  52. science
    14. the sun's layer is called the photosphere . ( 1point) A. true b. false 15. meteoroids can form when comets break apart , creating dust clouds . ( 1point ) A. true b. false 16. a star is born whenever a nebula expands . ( 1point ) A. true b. false 17. a star system has at ...
  53. Science Help Please
    Marie and Pierre noticed burns on their fingers after handling test tubes containing radioactive substances. This observation led to A. the discovery of natural fluorescence. B. the discovery of X-rays. C. the discovery of radiation therapy. D. the discovery of uranium. Is the...
  54. Science Help Please
    Marie and Pierre noticed burns on their fingers after handling test tubes containing radioactive substances. This observation led to A. the discovery of natural fluorescence. B. the discovery of X-rays. C. the discovery of radiation therapy. D. the discovery of uranium. Is the...
  55. Science Help Please
    1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength *** D.amplitude and frequency 2. ...
  56. science
    calculate the net force on an object that has a mass of 12kg and acceleration of 4m/sec
  57. Science Help Please
    1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength *** D.amplitude and frequency 2. ...
  58. Science Help Please
    A weatherman reports, "The storm waves are about 2 meters high and about 25 meters apart." What properties of waves is the reporter describing? A. frequency and wavelength B. wavelength and wave speed C. amplitude and wavelength D. amplitude and frequency Is the answer C?
  59. Science Help
    A projectile that is launched at 15 degrees and the landing height is the same as the launch position. If this is true, then at what other angle can the projectile be launch to achieve the same horizontal displacement?
  60. Science Help
    Soundproof rooms take advantage of which property of waves? A. Absorption B. Regular reflection C. Refraction D. Diffuse reflection Is the answer C? Thank you for your help and time.
  61. Science - 7th grade (repost)
    Can you check my homework? 38. How does natural selection lead to evolution? a. Organisms mutate to adapt to their environment. b. Helpful traits accumulate among surviving members of the species. c. Overproduction provides food for stronger members of the species. d. ...
  62. Science Check
    Hi! Can someone check my answers? Thanks!! :) Question 1: A skateboarder (coasting with a constant velocity) jumps straight up. What happens she she lands? Does she come down.... A.) behind the skateboard B.) ahead of the skateboard C.) on the skateboard My answer: B. Question...
  63. Science Please Help Me
    5. Which one of the following is not a cause of anemia? a diet lacking in iron and certain vitamins germs from someone with anemia inherited problems relating to red blood cells. loss of a large amount of blood 6. Which of the following carries blood to every part of the body...
  64. Science - 7th grade
    Can you check my homework? (don't think I'd posted before) 38. How does natural selection lead to evolution? a. Organisms mutate to adapt to their environment. b. Helpful traits accumulate among surviving members of the species. c. Overproduction provides food for stronger ...
  65. science Please Help Me
    5. Which one of the following is not a cause of anemia? a diet lacking in iron and certain vitamins germs from someone with anemia inherited problems relating to red blood cells. loss of a large amount of blood 6. Which of the following carries blood to every part of the body...
  66. Computer Science
    You try to run the CHKDSK utility from a command prompt but you keep getting an error message that you need to run it in Elevated Mode. How do you correct this? Reboot the computer in SAFE Mode and then run CHKDSK from a command prompt. Open command prompt from the Windows ...
  67. Science
    Can anyone help me find the half-life of strontium-90? I also need an explanation on how to do it. Thanks!! Radioactive Decay of Strontium-90: At 0 years: 100% remaining At 28 years: 50% remaining At 56 years: 25% remaining At 84 years: 10% remaining At 112 years: 5% remaining.
  68. science. mrs.sue please help
    14. the sun's layer is called the photosphere . ( 1point) A. true b. false 15. meteoroids can form when comets break apart , creating dust clouds . ( 1point ) A. true b. false 16. a star is born whenever a nebula expands . ( 1point ) A. true b. false 17. a star system has at ...
  69. Physical Science (H)
    A container of milk holds 3640 g of milk. The density of the milk is 1.02 g/mL. What is the volume of the milk in the container?
  70. science
    What is the difference between apparent and absolute magnitude
  71. Science - 7th grade
    Can you check the following? Experiment A: Four groups of rats are first massed and then fed identical diets except for the amount of vitamin A they receive. Each group gets a different amount. After three weeks on the diet, the rats’ masses are measured again to see if ...
  72. science
    describe 4 different types of satellites
  73. science
    what is a humble telescope
  74. science
    What advantages of space probes
  75. physical science
    most electricity generated in the united states comes from?
  76. science
    What is the difference between apparent and absolute magnitude
  77. Science
    What mass of water is needed to react completely with the Na2O2? Answer in units of g.
  78. Science
    Sodium peroxide reacts vigorously with water to produce sodium hydroxide and oxygen. The unbalanced equation is Na2O2(s) + H2O(ℓ)→ NaOH(aq) + O2(g). What mass of O2 is produced when 81 g of Na2O2 react? Answer in units of g
  79. science
    How long dose it take the moon to rotate once and how many days dose it take to orbit the earth
  80. Science
    Which of the following statements is true about a collison between two cars? The total momentum after the collision is the same as the total momentum befor the collision *** The total momentum after the collision is greater than the total momentum beforethe collision The ...
  81. science
    if you can only see one "north", and the tilt is tilting "south", then its obstructed right?
  82. Science
    After an avalanche, a huge block of a stone slid down a mountain and landed in the middle of a road. People in the nearby town had a very difficult time moving it out of the road, The block of stone is difficult to move because. it has a high amount of momentum has balanced ...
  83. science
    Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v0. Car 1 begins to move at t=0, speeding up with a constant acceleration ax. Car 2 continues to move with a ...
  84. science
    what is a vector?their structure?
  85. English
    Which statement most accurately contrasts the ideas of different literary periods? A. Anglo-Saxon literature focuses on free will, whereas Renaissance literature suggests that human beings are controlled by fate. B. Literature of the Middle Ages focuses on science, whereas ...
  86. science
    a solid weighs 100g in air 75 g in water and 70 g in oil.find relative density of oil
  87. SCIENCE
    A SCIENTIST NOTED A POSSIBLE RELATIONSHIP BETWEEN A CERTAIN CHEMICAL SUBSTANCE FOUND IN FISH AND THE OCCURRENCE OF THE KIDNEY FAILURE IN HUMANS. WHICH STEPS SHOULD THE SCIENTIST BEFORE CONDUCTING EXPERIMENT.
  88. Religion
    Many Christians seem to accept modern cosmology - Galileo's view that the earth is not the center of the Universe - while at the same time disagreeing with the theory of evolution. For this discussion, we will focus on the following questions (in 250 words total): 1. Why do ...
  89. Science Help Please
    1. Which of the following correctly describes a radio wave? A. long wavelength and high frequency B. long wavelength and low frequency C. short wavelengh and low frequency D. short wavelengh and high frequency Is the answer B? 2. When the energy of a light wave is transferred ...
  90. Science
    An elevator lifts 5 passengers 30 meters in 24 seconds. The power is 15,000w. What is the total weight of the elevator and passengers?
  91. physical science
    Picnickers see a lightning flash and hear the resulting thunder 9.0 s later. If the storm is traveling at a rate of 15 km/h, then how long, in minutes, do the picnickers have before the storm arrives at their location?
  92. SCIENCE
    hi. Just saying.. I need an answer quick because this is due tomorrow!!! Ok. So, my question was explain the particle theory of why does black objects gets absorbs by heat faster/better? and why does white objects get cooler faster? Thanks And reply as soon as possible!!!!
  93. science
    1.40g each of CO, H2O, and H2 are sealed in a 1.41−L vessel and brought to equilibrium at 600 K. CO(g)+H2O(g)⇌CO2(g)+H2(g)KC=23.2 How many grams of CO2 will be present in the equilibrium mixture?
  94. science past year
    1.1. A resitance of 1.5ohm is connected in parallel with a resistance of 3 ohm. This combination is connected in series with a resistance of unknown resistance of value R. The circuit is then connected acress a 10 V supply. Calculate: 1.1.1. The value of the resistor R when a ...
  95. Science
    which of the following helps ensure a groups access to resources it needs for survival? My answer is D. Territorial Behavior. Please check if this is right?..
  96. math
    Marcus is doing a science experiment in which he measures the rate at which bacteria multiply. Every 15 seconds the bacteria double in number. If there are 10 bacteria now, how many will there be in 2 minutes?
  97. Science
    Are all white cells the same? How do you know? Explain.
  98. Science
    What might happen if the mucus in your nose, throat, and lungs suddenly dried up? Help
  99. 4th grade Science
    why are acids that are found in the stomach and sweat important? HELP
  100. 4th grade Science
    explain how your circulatory and immune systems work together to keep you healthy. Pleaseeeee help!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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