1. Science
    Element Y has a half life of 50days. How much of a 100mg of its sample will remain after 5 month?
  2. Science
    The most covalent of the chlorides; LiCL,BeCL2,MgCL2 and AlCL3 is (a)MgCL2 (b)AlCL3 (c)Licl (d)BeCL2
  3. Science
    The hydride of group VIA element are- Option (a)volatile covalent gases (b)volatile covalent solids (c)volatile covalent liquids (d)volatile ionic liquids
  4. Science
    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? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof rooms take...
  5. Science
    Draw the position-time graph of a stationary body also draw velocity time graph of a stationary body
  6. science
    You would expect that an injection of an opiate drug into the __________ would activate dopamine neurons in the nucleus accumbens. A. ventral tegmental area B. medial septal region C. periaqueductal gray matter D. preoptic area My choice is C
  7. science
    A panic-prone person who ingests a(n) __________ would be expected to show increased anxiety. A. benzodiazepine agonist B. tricyclic antidepressant C. MAO inhibitor D. benzodiazepine antagonist is it A
  8. Mia
    A Screamingly Good Science Lesson Elizabeth Kibler 1Amusement park rides give us thrills, exhilaration, and delight. If you pay attention, these rides can give you something else—a science lesson. Roller coasters are amazing rides that can twist and veer until you scream; ...
  9. Science
    What does the electron shell rotate around?
  10. Science
    why is electricity is not sent in smaller voltages from the power station rather than substation? why does the sub stations smaller the high voltages, why aren't they sent in smaller voltages from the power station?
  11. Science
    Which sphere of the Earth system contains nearly all of Earth's mass? A. the geosphere B. the atmosphere C. the biosphere D. the hydrosphere
  12. Pysics science
    How much work is done when a bucket of mass 1.5kg with 10g of water in it is pulled up from the bottom of a well 8m deep? Take g=9.8m/s2 (a)100.3j(b)2000.5j(c)901.6j(d)453.7j
  13. science
    girl of mass 40kg having v 2m/s jumps on a stationary cart of mass 4 kg find the velocity of girl when the cart starts moving
  14. science
    a solutioohol mixed with 125 cu.cm of water find the concentrationn contains 4.5 cu.cm of alc
  15. earth science
    What is the most abundant fossil fuel? A:Coal B:Gas C:Wood D:Oil
  16. Science
    A Herculean bomber jet accepts 40kg of air per second at a velocity of 200m/s, burns 2kg of fuel at the same time,and releases exhaust gases at 600m/s relative to the bomber. find the thrust due to its engine.
  17. Science
    Every individual, including young people, can make decisions to use resources wisely. Use the terms reduce, reuse, and recycle to explain how the students in the image above can help minimize solid waste.
  18. Science
    a flask contain 25 ml of HNO3 solution which requires 30 ml of 0.2 M KOH to complete the reaction. calculate the concentration of KOH. HNO3+ KOH= H2O + KNO3
  19. science
    A light spring is initially used to suspend masses from the ceiling. When a 4.0 kg mass is attached to the spring, its length is 22.0 cm. When an additional 2.3 kg mass is attached to the bottom of the 4.0 kg mass, the spring's length measures 26.8 cm. Determine the spring's ...
  20. Science
    A block of weight 7.0N rest on a level floor. The frictional force between the block and the floor is 1.0N, A horizontal force of 1.4N is used to pull the block for 4s.what is the velocity of the block after this time?
  21. science
    If the half life- period of a radioactive element is 1600.After how many years will if remains 25% of his quantity
  22. biology/science
    What are the biological terms for the following 1.process in biotechnology that is used to make human insulin in a bacterial cell 2.white blood cells produce antibodies in response to pathogens
  23. science
    Fossil fuels are a. A natural resource b. Renewable c. Made from minerals d. Burned in hydroelectric plants
  24. life science
    give the biological term for the following 1.process in biotechnology that is used to make human insulin in a bacterial cell 2.white blood cells produce antibodies in response to pathogens
  25. science plz help ms sue
    Compare and contrast spiral and elliptical galaxies. (Make at least 2 comparisons.) plz help me with eclest what is to comparisons
  26. Science
    Provide three statements that demonstrate the importance of units when describing motion. Please help and thank you!! asap Ms.Sue?
  27. Science
    A 45 N force is applied to a 9.6 kg object, what is it's acceleration?
  28. Science
    Why do people debate on fossil fuels? Is it based on how its used? Thanks
  29. science
    What does composition mean when you're talking about biotic and abiotic
  30. science
    What are some biotic items we do at home.. I only have the abiotic side.
  31. science
    Is a laptop biotic or abiotic?
  32. Earth Science
    Which of the following are you most likely to experience a-total solar eclipse b-total lunar eclipse c-full moon d-partial lunar eclipse? my answer is full moon
  33. science
    From the cosmic background radiation, what can scientists infer that the universe was like after the big bang? A. Very small B. Hot C. The same average temperature as it is today. D. Cooler than it is today. Is the answer C? Thank you for the help😊
  34. science
    Flight simulators are used to train new pilots because ____.
  35. science
    An illness caused by a protist is? protozoa is my answer i think is it right?
  36. science
    An illness caused by a protist is protozoa? True or False My answer is true am i correct?
  37. science
    A protostar has a high enough ___ to become a star. A. Volume B. Mass C. Temperature D. Brightness Is the answer B? Thank you
  38. science
    Which of the following is s major difference between elliptical galaxies and spiral galaxies? A. Elliptical galaxies have almost no gas or dust between starts. B. Elliptical galaxies vary more in shape than spiral galaxies. C. Spiral galaxies have almost no gas or dust between...
  39. science
    A protostar has a high enough___to become a star. A. volume B. mass C. temperature D. brightness Is the answer B? Thanks in advance
  40. Science
    18. The human immune system produces ______________ in response to a vaccine, which later can bind to and destroy a pathogen if it invades. (1 point)
  41. science
    how many seconds does it take for Mercury to go from 0 degrees Celsius to 300 degrees Celsius? 1. 5 seconds 2. 10 seconds 3. 30 seconds 4. 357 seconds
  42. Science
    When you make a pedigree and it says Theos wife Mary is a purebred right-handed person what does purebred mean
  43. science
    Given the following reaction (it IS balanced), how many grams of CO2 are produced when 0.700 moles of toluene (C7H8) is allowed to completely combust? C7H8 + 9 O2 ¨ 7 CO2 + 4 H2O
  44. Science
    If a full moon occurred on April 1, what phase would you see on the 7th, 21st,4th,30th,and 14th of April
  45. Science
    In the ocean, there are area's where there are very few living things. _______ is the term that when this happens to a natural area.
  46. Physical Science heat & temp. Chapter
    How much heat in calories is required for (2.7 lb) of ice –200 F to be converted to water at 40 F?
  47. science (chemistry)
    why does the pH of the acid solution initially increase very slowly when metal is first added to the acid solution, but gradually increase at a faster rate as the reaction proceeds to completion? I thought it may be because the metal is just then being completely dissolved but...
  48. Science
    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? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof rooms take...
  49. science
    How to calculate the mass of 17 ml of 2 mole of sulfuric acid?
  50. science.......
    1.a ball with a mass 2kg rests on an incline with an angle of 10 degrees. The ball is released to roll down the incline plane neglecting all friction: Determine the following: A.the loss in potential energy after it has rolled 12m. B. The kinetic energy C.the velocity after it...
  51. engineering science n3
    A train with a mass of 120Mg accelerates uniformly on a horizontal track.the resistance to movement is 5N per KN of the mass of the train. The force in the draw-bar of the locomotive is 80KN.calculate: 1.the force required for the constant speed. 2.the force that causes the ...
  52. Science
    What kind of energy is transferred in an energy pyramid
  53. science
    these are all very confusing for me 1. Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really ...
  54. Science(need help)
    1) What evidence is there that the human species has been successful so far? Explain. 2) What environmental pressures in the past do you think were most important in shaping the human species as it exists today? 3) What environmental pressures exist now that you think may be ...
  55. Science
    How much current does a flashlight use if its battery supplies 3.0 Volt and the bulb has a resistance of 4.0 Alpha
  56. science.......,,....
    train with mass of 120mg accelerates uniformly on a horizontal track. The resistance to movement is 5N per kN of the mass of the train. The force in the draw-bar locomotive is 80kN Calculate a. The force required for constant speed b. The force that causes the acceleration c. ...
  57. Science
    1. What do bone marrow (the soft connective tissue that fills the internal spaces in bone) and the dermis (layer of the skin under the epidermis and over the hypodermis) have in common? (1 point) • They are both sites of new cell formation. • They both contain or are ...
  58. science.......
    An electric bulb is marked 220v60w. An ammeter in the circuit shows the bulb uses a current of 0.2727A. The bulb burns for an hour. Calculate the following: A. The electrical energy consumption B. The cost for the bulb to burn for one hour if the cost of electricity is 17.45 ...
  59. Please help asap science
    1. An electrical circuit consists of a battery with 2 cells,each with an EMF of 12 volts and an internal resistance of of 0.4 ohms,connected in parallel. An ammeter with an internal resistance of 0.15 ohms is connected in series with resistor Ra=2ohms and Rb=4ohms Calculate ...
  60. science please help and explain asap
    A train with mass of 120mg accelerates uniformly on a horizontal track. The resistance to movement is 5N per kN of the mass of the train. The force in the draw-bar locomotive is 80kN Calculate a. The force required for constant speed b. The force that causes the acceleration c...
  61. science
    A mixture of zinc and anhydrous zinc nitrate was heated in air, and its mass has not changed after this procedure. Calculate the mass frac-tions of the components in the mixture.
  62. science 1 question
    4. When a fan is turned on, it changes electrical energy into __________ energy. (1 point) motion magnetic gravitational*** electromagnetic
  63. physical science
    What is the amplitude of a longitudinal wave
  64. science please help
    1.a ball with a mass 2kg rests on an incline with an angle of 10 degrees. The ball is released to roll down the incline plane neglecting all friction: Determine the following: A.the loss in potential energy after it has rolled 12m. B.the velocity after it has rolled 12m. C.the...
  65. science please help asap
    1.a ball with a mass 2kg rests on an incline with an angle of 10 degrees. The ball is released to roll down the incline plane neglecting all friction: Determine the following: A.the loss in potential energy after it has rolled 12m. B.the velocity after it has rolled 12m. C.the...
  66. Math
    On Tuesday, Leslie spent 47 minutes on math homework, 39 minutes on science homework, 52 minutes on English homework, and 44 minutes on history homework. How much time did Leslie spend doing her homework on Tuesday?
  67. Science
    Which two elements represent the same family of the periodic table? Hydrogen Helium Lithium Fluorine Is it none??
  68. Science
    what is an isotope
  69. Science
    H2) -----> H^+ + OH^- Is this equation balanced
  70. Science
    what are some challenges to biodiversity
  71. Science
    I really need help with my science which is based on Galileo Galilei. I need information about his early life,education, his fun facts, his contributions,and how his contributions affect us. i got some information but i need help finding proper info. thanks
  72. science please help asap
    1.a train with a mass of 120mg accelerates uniformly on a horizontal track. The resistance to movement is 5N per kN of the mass of the train. The force in the draw bar of the locomotive is 80kN. Calculate A.The force required for the constant speed. B. The force that causes ...
  73. science
    1.a ball with a mass 2kg rests on an incline with an angle of 10 degrees. The ball is released to roll down the incline plane neglecting all friction: Determine the following: A.the loss in potential energy after it has rolled 12m. B.the velocity after it has rolled 12m. C.the...
  74. science
    100mL of oxalic acid (H2C2O4) requires 35mL of 0.04M KMnO4 to titrate it to the endpoint. calculate the molarity of the oxalic acid.
  75. science
    When the metal sample reacts with acid, the gas evolved will be collected over water; the gas is said to be "wet". What is the composition of the wet gas? How can the partial pressure of hydrogen be obtained from the total pressure of wet gas? From where will you obtain the ...
  76. science
    The solubility of sugar in water in room temperature is 204 g/ 100 ml. a) How much sugar will dissolve in 100 ml of water at room temperature? b) How much sugar will dissolve in 200 ml of water at room temperature?
  77. science
    The solubility of sugar in water in room temperature is 204 g/ 100 ml. a) How much sugar will dissolve in 100 ml of water at room temperature? b) How much sugar will dissolve in 200 ml of water at room temperature?
  78. Science
    Who have made god
  79. Science
    How much work do you do when you push a shopping cart with a force of 50N for a distance of 5M
  80. science
    The analysis of lead (Pb) in a sample of solder was carried out using atomic absorption spectroscopy as follows. 1.013 g of solder was completely dissolved in a small volume of nitric acid and the solution made up to 1.000 L with distilled water. A 50.0 μL aliquot of this...
  81. Physical Science
    A model electric train requires 12 V to operate. When connected to a household voltage of 120 V, a transformer is needed. If the primary coil has 500 turns, how many turns must the secondary coil have?
  82. science
    I have a science experiment and I'm not sure how to do this or have all the materials to do it can anyone help? For this portfolio, you will design an experiment to investigate the relationship between the number of coil loops and a strength of a solenoid. Once you have an ...
  83. science
    how is a parameter related to designing an experiment?
  84. Life science,agric science,geography,history,maths
    I'm doing these subjects and my career is to be a dectective,so now I just want to know regarding coarses.
  85. 6th Grade Science
    Hi, I really need help and I'm really confused I don't know what they are asking me to do. Provide three statements that demonstrate the importance of units when describing motion. Please someone help me because it is very important. Thank You :/
  86. Science
    State how matter moves through the biosphere. State how energy moves through the biosphere. Explain each statement using examples to illustrate your explanation.
  87. Science
    What is the effect of the slope of an incline of a surface on an object’s speed?” PLEASE do not answer...I just need help understanding it. Thank You
  88. Math, Science
    A woman throws a 0.25 kg ball straight up in the air with a initial speed of 15 meters per second. how far above the woman will the ball go before it starts coming back down?
  89. science
    graduated cylinders are not as precisely calibrated as are burets or volumetric pipets. briefly explain why it is acceptable to measure KI and HCl solutions in the titration with graduated cylinders rather than with pipets or burets.
  90. Science
    Which statement describes the relationship among the sun wing and ocean currents A. The sun heats the ocean surface causing water to evaporate producing wind currents B.The sun heats earth unequally cuaing winds that drive ocean surface currents C.The sun heats the air and the...
  91. Science
    what determines the movement of global winds
  92. career help
    one year ago This degree program is designed to prepare students to enter a career upon completing the degree with no further study required. Some are transferable to a state university program to continue education. Associate in Arts (AA) Associate in Science (AS) Associate ...
  93. Science
    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? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof rooms take...
  94. Science
    Portfolio: you will design an experiment to investigate the relationship between the number of cool loops and the strength of a solenoid. Once you have an experiment plan carry out your experiment and record your data. After you have finished conducting the experiment, write a...
  95. science
    a racer in a kayak travels a 300-meter river course at an average speed of 3 meters per second. how long does it take to complete the course?
  96. science help.. pls help me dr.bob22 or damon
    Sodium Chloride is formed when atoms lose and gain electrons Carbon monoxide is formed when atoms share electrons. In both substances atoms are held together by a(n) is it chemical bond pls help me
  97. science help.. pls help me dr.bob22 or damon
    In a water molecule, 2 atoms of hydrogen and 1 atom of oxygen share electrons. A _______ bond, is found in water molecule is it chemical bond pls help me
  98. science help.. pls help me dr.bob22 or damon
    Dalton's ideas that atoms cannot be divided into smaller parts was disproved by the discovery of the_____ is it electrons
  99. science help.. pls help me dr.bob22
    A metal from group 1 and a nonmetal from group 17 are? A. Not likely to bond B. Likely to form a covalent bond C. Likely to form a ionic bond D. Likely to form a metalloid is it c pls help me pls help me
  100. pls help me dr.bob22 science
    Which of the following demonstrates that reactants and products are chemically different? A.Zn + 2HC1 = 2HCl + Zn B. Zn 2HCl = H2 + 2 nCl2 C. H20 + C4H10 = H20 + C4H10 D. C4H10+ H20= C4H10 +H20 is it b pls help me
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