Scientists

  1. Biology
    Pretty confusing AS Biology question: A scientist carried out an experiment to separate the organelles in an animal cell by mass. The scientist mixed the cells with a buffer solution which had the same water potential as the cells. He then broke the cells open with a blender ...
  2. Science
    Please help me with these questions from the Science 6: Forces and Motions Unit Test. My answer-****** 1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point) It will move due to inertia. Gravity will eventually ...
  3. Science Answer Check
    1. Which of the following statements is true about artificial selection? A. Breeders can control which animals mate. B. Breeders can control what mutations will appear in the offspring. C. Both A and B are true. D. Neither A nor B is true. 2. Which of the following is not a ...
  4. History
    Which option suggests the wide-ranging influence of the refugee Nazi scientists on US technology? A-these scientist proved themselves trustworthy by designing the atomic bomb, leading to the Saturn V rocket. B-These scientists developed the first working pro type of what would...
  5. English
    Choose incorrect if the sentence is punctuated incorrectly. Choose correct if it is punctuated correctly. 1: Gravel, crushed rock, cinder- these are used as ballast on railroad beds. Correct*** 2:Ben Franklin[noted statesmen, scientist, and philosopher] attended school for ...
  6. Algebra
    A radioactive substance decays exponentially. A scientist begins with 140 milligrams of a radioactive substance. After 21 hours, 70 mg of the substance remains. How many milligrams will remain after 35 hours?
  7. science
    Which option correctly defines a scientific theory? a scientist’s best guess, or assumption, about the cause of a problem an explanation for observable facts that is supported by experimental evidence a process of carrying out specific, well controlled tests in order to ...
  8. Science
    In this study, a scientist designed an experiment to test plant growth. The plants were planted in identical pots with the same brand of potting soil. Each plant was watered with 20 ml of spring water every third day at 9:00 AM. Name the controlled portion of this experiment, ...
  9. Trigonometry
    A scientist has 37 grams of a radioactive substance that decays exponentially. Assuming k=-0.3,how many grams of radioactive substance remain after 9 days.
  10. science
    A scientist is studying a chemical reaction. She predicts that after the reaction the product will have less chemical potential energy than the reactants had originally. The scientist observes the reaction, and notes that no light or sound is produced. However, other ...
  11. Math geometry
    Scientist estimate the rate of a wildebeest running at full speed to be 66 feet per second. Write a function rule to describe the relationship between the time, t, and the distance, d, a wildebeest travel's when running at full speed. A. t=66d B. 66=d•t C. d=66/t D. d= 66t...
  12. science
    In order to present information to a technical audience, what should a scientist do? avoid technical jargon use interesting metaphors be as wordy as possible in conveying ideas use a highly structured format D?
  13. science
    Read the statement and then apply it to the scenario. Statement In science, it is not possible to prove hypotheses right. This is not the fault of scientists and their experiments; the scientific method is only able to tell scientists if their hypotheses are incorrect. ...
  14. science
    In order to write for the general public, what should a scientist do? (Select all that apply) describe detailed experimental methods use technical jargon use metaphors, games, or stories determine the level of knowledge of the audience C, D?
  15. Math
    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 likely A. From Group 17 ********** B. From Group 1 C. From Group 15 D. A Noble Gas Is this correct?
  16. Science
    6.A scientist is studying a plant species in which the flower color genes are codiminant. The scientist crosses a plant with red flowers and a plant with white flowers. The offspring will most likely have.. A. Red flowers B. White flowers C. Pink flowers D. Red flowers with ...
  17. English
    Select the letter of the pair of words that expresses a relationship most like the relationship expressed by the following pair: 1. oneness: unity a. workout : perspire b. day : hour c. premiere : debut d. gardening : trowel e. ring : wedding (E) 2. stethoscope : doctor a. ...
  18. science
    Which option correctly defines a scientific theory? an explanation for observable facts that is supported by experimental evidence a scientist’s best guess, or assumption, about the cause of a problem a process of carrying out specific, well controlled tests in order to ...
  19. science
    What was the big Bang theory? How did scientist learn about it? Why is it so important today?
  20. Chemistry
    The procedures of an experiment state that 1.3 g of copper (Cu) should be produced. However, the scientist’s experiment produces 0.9 g. What is the absolute error?
  21. science
    Which option correctly defines a scientific theory? an explanation for observable facts that is supported by experimental evidence a scientist’s best guess, or assumption, about the cause of a problem a process of carrying out specific, well controlled tests in order to ...
  22. science
    Which option would guide the thought processes of a scientist? instinct hearsay opinion empirical data D?
  23. math
    A scientist is working with 7 meters of gold wire. How long is the wire in millimeters?
  24. Science
    A scientist from the United States conducts an experiment using miles per hour to measure speed. Why might this be confusing for scientists in other countries? A) Scientists in other countries don't usually perform experiments involving speed. B) Scientists in other countries ...
  25. Biology
    OPEN ENDED: In a laboratory a scientist is experimenting with a synthetic enzyme called “hydrolase”. The goal of this enzyme is to bind to intracellular water and speed up hydrolysis RXNs within the cell, so that cells can break apart any polymer at a much faster rate ...
  26. Chemistry
    Research the contributions from these two scientists and read about how Avogadro’s number got its name. Briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in...
  27. SCIENCE
    ANY ONE HAVE THE ANSWERS PLEAZZZZ Mosquitoes, Be Gone! What scientific claim did the young scientists make regarding mosquitoes? * 6 points A. The young scientists claimed that mosquitoes are easily repelled using DEET and over the counter products. B. The young scientists ...
  28. MC science history
    Which of the following is not considered part of the "golden age" of microbiology? A.First artificial vaccine is developed B.Gram stain is devised C, Viruses are defined D.all of the above Who determined Archaea are the third domain of life? A.Carl Woese B.Winogradsky C.Kary ...
  29. science
    Directions to the City of Springfield has built a public park around beautiful Cypress Pond. The city has hired you as its lead environmental scientist. Your job is to monitor the impact the new park has on the. Biodiversity of cypress pond. You will need to use information ...
  30. English
    Need help with some questions! A silent killer is spreading poison across the earth. Rain, polluted by the grass given off by factories and motor vehicles, is becoming highly acidic. This "acid rain" is slowly destroying our environment. Acid rain has already damaged millions ...
  31. Chemistry
    An atmospheric scientist interested in how NO is converted into NO2 in urban atmospheres carries out two experiments to measure the rate of this reaction. The data are tabulated below. A: [NO]0 = 9.63 × 10-3 M, [O2]0 = 4.1 × 10-4 M t(s) 0 3.0 6.0 9.0 12.0 [O2](10-4 M) 4.1 2....
  32. science
    Why do scientist us liters and milliters instead of gallons and ounces
  33. Science check my answers please
    1. Convert 4.0 kilometers (km) to meters (m). (1 point) 0.04 m 40 m 400 m 4,000 m (my answer) 2. For his science project, Austin wants to determine if the pH of standing rainwater changes over time. He collects a jar of rainwater and places it indoors in a spot that does not ...
  34. English
    Instructions: Organize the mystery sentence. 1. Imagine – having – to – live – prehistoric – like – people – did. Imagine having to live like prehistoric people did. 2. They - spent – a – lot – of – time – and – searching – for – fruit – nuts. ...
  35. chemistry
    Examine the information. Isotope B has a half-life of 3 days. A scientist measures out 100 grams of this substance. After 6 days has passed, the scientist reexamines the sample. How much of Isotope B will remain in the sample? 100 grams 63 grams 94 grams 25 grams
  36. Marine Science (Check my answers?)
    3. What feeding strategy and adaptation would an organism that lived in the abyssopelagic zone most likely use in order to survive, and why? A. Scavenge dead matter on the ocean floor because it is difficult to find prey in the darkness. B. Use bioluminescence to scare away ...
  37. chemistry
    Read the scenario. A scientist needs to dissolve a solid in a liquid as quickly and efficiently as possible. Which two methods should she use to get the desired result? heat the solution and use larger chunks of the substance heat and stir the solution cool and stir the ...
  38. social studies
    Do political scientist consider the society described here to be a country?
  39. chemistry
    Examine the information. Element A has a half-life of 10 days. A scientist measures out 200 g of this substance. After 30 days has passed, the scientist reexamines the sample.  How much Element A will remain in the sample 100g 12.5g 50g 25g is it d?
  40. Science
    Please help Me With These Questions 1.what is one difference between the scientific theory and scientific law 2. what are two similarities a scientific theory and scientific law 3. Sam noticed every time she rolled a ball on a flat surface it did not stop unless she applied a ...
  41. Data Science
    I've been accepted into a General Physics degree programme in my country.If I'm willing to start my career as a data scientist,what subjects should I study at the university? Would the knowledge of programming languages will be an extra qualification or is that compulsory? I ...
  42. Science
    What resources should a scientist use to research water pollution?
  43. SCuenca
    In general, what would a scientist do after forming a testable questions
  44. Math Help, Check My Answers Please
    Please check my answer, I wanna make sure I get it right. 4.Personal bias can cause a scientist to misinterpret an observation or the results of an experiment. True False*****
  45. chemistry
    A scientist discovers that an atom with a mass number of 14 contains eight electrons. According to the scenario, what is the atom's atomic number? 22 6 8 14 please help
  46. chemistry
    Which of the answers choices best describes John Dalton's contribution to atomic theory? he discovered to nucleus he gave future scientist a foundation for understanding how electrons move. he gave future scientist a foundation for understanding how atoms make up matter. he ...
  47. science
    which of the following reasons best explains why scientists need a standard measurement system A)scientist would not be able to communicate at all without one B)if they did not use one data could be misinterpreted (My answer) C)experiments could not be completed without one D)...
  48. Science I reallllllyyy need help!!!!
    which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the natural world a well-...
  49. Science
    One scientist discovered a new theory on the evolution of stars. Why is it necessary for scientists all over the world to agree with the theory before it can be accepted? A) it make certain that the results are reliable B) to transform the results of the theory into law C) to ...
  50. science
    A scientist is examining a multicellular organism that has a cell wall. What kingdom does this belong to? a. Fungi b. Animalia c. Plantae d. Eubacteria i believe that its a
  51. Social Studies
    Which of the following scientist was known for his studies of the stars and planets? 1. Galen 2. Horace**** 3. Ptolemy 4. Spartacus Please check!
  52. history
    1. What is allocation by need? (1 point) pricing goods based on want rather than need giving or selling goods only to people who most need them giving or selling goods to whoever will stand in line the longest pricing goods so that even the most vulnerable members of society ...
  53. Chemistry
    A scientist studying the reaction between decaborane (B10H18) and oxygen mixed 1.00 x 10^2 grams of decaborane with 2.75 x 10^2 grams of oxygen. Compute the masses of all substance present after the reaction went ot completion, generating B2O2 and water as the only products.
  54. Chemistry 2
    A scientist studying the reaction between decaborane (B10H18) and oxygen mixed 1.00 x 10^2 grams fo oxygen. Compute the masses of all substances present after the reaction went to completion, generating B2O3 and water as the only products.
  55. Chemistry
    A forensic scientist is given a white substance that is thought to be cocaine. The substance is found to have a percent composition: 49.48% C, 5.19% H, 28.85% N, and 16.48% O. What is the empirical formula for this substance? Is it cocaine?
  56. EMpirical and Molecular Formula
    A forensic scientist is given a white substance that is thought to be cocaine. The substance is found to have a percent composition: 49.48% H, 5.19% H, 28.85% N, and 16.48% O. What is the empirical formula for this substance? Is it cocaine?
  57. art
    In what way is a conservator similar to a scientist? A:Both conservator and scientist relish doing research for extended periods of time. B:a conservator experiments with conservation materials just as a scientist experiments with different hypothesis. C:conservators and ...
  58. science
    The work of which scientist(s) helped to explain light's ability to propagate through a vacuum? A. Maxwell ==B. Davisson and Germer C. Fresnel, Fraunhofer, and Arago D. Newton An object that has a height of 0.4 meter is placed at a distance of 0.7 meter from a concave ...
  59. Physics
    Could you please check these? The work of which scientist(s) helped to explain light's ability to propagate through a vacuum? ++A. Maxwell B. Davisson and Germer C. Fresnel, Fraunhofer, and Arago D. Newton An object that has a height of 0.4 meter is placed at a distance of 0.7...
  60. chemistry
    Robin the Research scientist prepares 100 mLs of a solution of 100 mM of Tris HCl. What is the pH? and part two for this question Calculate the pH when the scientist adds 100 ul of 50% NaOH
  61. Chemistry
    Robin the Research scientist prepares 100 mLs of a solution of 100 mM of Tris HCl. What is the pH? and part two for this question Calculate the pH when the scientist adds 100 ul of 50% NaOH I am confused since we do not know the conjugate base concentration so how to solve for...
  62. Chemistry
    Robin the Research scientist prepares 100 mLs of a solution of 100 mM of Tris HCl. What is the pH? I am confused since we do not know the conjugate base concentration so how to solve for the pH
  63. Science
    By using different types of technology like satellites, radar, and river gauges, scientist can reduce flood damage and loss of life A:Models B:Automated weather systems C:Nonpoint sources D:Advanced warnings I think the answer is D. Thank you for your help.
  64. english
    (b) Choose two of the scientists you read about in the Stories of Scientists unit. Compare and contrast these scientists. Answer this question in no fewer than two paragraphs. Be sure to include specific details about each scientist’s life, career, and personality in your ...
  65. math
    A scientist observes two colonies of bacteria. The first grows at a rate of 2.2 x 10^6 bacteria per hour. The other grows at a rate of 6.3 x 10^5 bacteria per hour. Which grows faster? How do you know?
  66. science
    If a scientist wished to to determine the effect of a certain herbicide on wee growth he would include a control in the investigation. Suggest a suitable control in this case.
  67. MATH
    A scientist needs 80 liters of a 30​% acid solution. He currently has a 20% solution and a 60% solution. How many liters of each does he need to make the needed 80 liters of 30​% acid​ solution?
  68. Algebra 1 Please help
    A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days: f(n) = 8(1.05)n Part A: When the scientist concluded his study, the height of the plant was approximately 11.26 cm. ...
  69. Science
    A scientist is studying a plant species in which the flower color genes are codiminant. The scientists crosses a plant with red flowers. The offspring will most likely have A. Red flowers B. White flowers C. Pink flowers D. Red flowers with white patches
  70. spanish
    what can scientist learn from studying the forest around the crater in the Poas Volcano?
  71. U.s History
    1.Which statement best describes an effect of William Penn's actions on colonial America? A)Cash-crop agriculture became more profitable in the Southern colonies. B)Many immigrants came to the Middle colonies seeking religious freedom.*** C)Several northern colonies decided to...
  72. Science
    What is a scientist who studies humans???
  73. yhsh
    A scientist determined that the bones from a mastodon had lost 79.579.5​% of their​ carbon-14. How old were the bones at the time they were​ discovered?
  74. English
    My answers are *** 10.   The author of “My Brother’s Keeper” emphasizes Jamie’s conflict by  (1 point) A. describing the car accident in detail. B. detailing Jamie’s physical appearance and good grades. C. flashing back to earlier events with his brother Ted.*** ...
  75. Science
    1.) Why is it important to have a quiet study space? It is easier to concentrate in a quiet space, and concentration is needed to learn. * It is easier to leave all your study material in a quiet study space so you can find it. A quiet study space prevents incorrect ...
  76. Science
    How do scientist work
  77. Please help do by 10:00 Science
    1. Convert 4.0 kilometers (km) to meters (m). (1 point) 0.04 m 40 m 400 m 4,000 m 2. For his science project, Austin wants to determine if the pH of standing rainwater changes over time. He collects a jar of rainwater and places it indoors in a spot that does not receive a lot...
  78. Science 7th Grade
    How do i solve this. Atomic Theory Date (year) Name of Scientist(s) Contribution to the Theory Source 5th century BC Leucippus and Democritus They proposed that all matter is composed of tiny particles called atoms that can’t be split into smaller pieces and that attach to ...
  79. ela
    1. Which of the following is not part of the rising action in "Raymond's Run"? (1 point) A. Squeaky and Raymond confront Mary Louise and her friends on Broadway. *** B. Mr. Pearson hints to Squeaky that she should consider letting the new girl win. C. Squeaky is responsible ...
  80. Language Arts
    1. Which of the following is not part of the rising action in "Raymond's Run"? (1 point) A. Squeaky and Raymond confront Mary Louise and her friends on Broadway. B. Mr. Pearson hints to Squeaky that she should consider letting the new girl win. C. Squeaky is responsible for ...
  81. Chemistry
    A scientist used 21.0g of NaHCO3. How many miles of NaHCO3 were in this sample?
  82. Sciences
    scientist are often eager to learn more about the world around them. what is this attitude called? Curiosity •• Honesty Creativity Ethics
  83. Science
    Q1: Why do scientist use models? A.) Scientist use models to learn about things that are too small, too late, or too complex to observe directly. B.) Scientist use models because doing so is always part of the scientific method. C.) Scientist use models because they always ...
  84. 8th Grade Science
    Why do scientist use standered units of measurements? A.) Because their tools only measure in units B.) Because their units are either too small or too large to work with C.) So they can communicate findings without confusion D.) So that people who are not scientists can ...
  85. Check answer for la please!!
    In which sentence is the word periscope used correctly? A. Excited about her finding, the scientist used a periscope to view the organisms in the water sample. B. On the night of the full moon, we used the periscope to look at the sky. C. Sitting behind the tall stone walls, ...
  86. SCIENCE
    1. WHICH OF THE FOLLOWING IS MOST LIKELY TO RESULT IN A SCIENTIST DRAWING WRONG CONCLUSIONS? A. CONDUCTING A DOUBLE-BLIND TEST B. CONDUCTING A CONTROLLED EXPERIMENT C. PREVENTING OPINIONS FROM AFFECTING DATA COLLECTION D. GATHERING DATA FOR A BRIEF PERIOD OF TIME D
  87. geometry
    A cylindrical beaker has a height of 5 inches and a volume of 63 cubic inches. A scientist pours a chemical from the beaker to a similar beaker with a height that is 100% greater. What is the volume of the larger beaker?
  88. Science
    A scientist studying the effects of gamma rays on marigolds gathered the data shown below. Hypothesis: Marigolds exposed to higher levels of radiation will not grow as well as marigolds that are exposed to less radiation Plant A: Gamma Rays (Rad/day) is 5. Water (mL/week) 50. ...
  89. Science
    which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the natural world a well-...
  90. Science
    Why might a scientist estimate a measurement?
  91. College Chem.
    A scientist adds 1.00 moles of phosphoric acid to a liter of water to make a solution. How many moles of NaOH should be added to ensure that the concentration of H2PO4- is equal to three times the concentration of HPO42? Remember that H3PO4 is a triprotic acid. I don't even ...
  92. Science
    3. Which of the following small bodies are the hardest to tell apart because they are made of similar materials? dwarf planets and comets asteroids and comets comets and meteoroids asteroids and meteoroids** A scientist examines a sample of an object from the solar system. ...
  93. Math
    If a substance has a half life of 600 seconds. If a scientist begins with an initial amount of 1kg complete the following problems: create an exponential equation using proper variables?
  94. life sciences
    Formulate a hypothesis for this investigation? A scientist used biotechnology to clone a cow.over a period of 10 days the clones were monitored carefully and the number of the survived clones were notated.the line graph below presents the results of the survival rate.
  95. Science
    Name two types of evidence used to support the theory if evolution. Explain how scientist use each type of evidence to provide support for evolution. Give one example of each
  96. Chemistry
    As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 4.0 × 101 cans of soda which are warm at 82.9°F. Each can has a mass of 378 g and ideally you want the temperature of the drinks to be 40.1°F. If ...
  97. Sri sankara global academy/ Chemistry
    A food scientist also tested some ethanoic acid solution. Ethanoic acid is the acid which is found in vinegar.His results are shown below. vinegar ethanoic acid Volume used/Cm3 50 10 volume of NaOH needed to neutralise/cm 30 10 The ethanoic acid solution contained 10 g of acid...
  98. About Drama
    1. Which of these sentences is using appositive phrase correctly? a. The Grand Canal, which is the oldest man-made waterway in the world, is still used today in China. **?? b. The Grand Canal in China is a man-made waterway, still used, that is the oldest in the world. c. The ...
  99. All about DRAMA! P.S. - Please check!
    1. Which of these sentences is using appositive phrase correctly? a. The Grand Canal, which is the oldest man-made waterway in the world, is still used today in China. b. The Grand Canal in China is a man-made waterway, still used, that is the oldest in the world. c. The Grand...
  100. Math
    A scientist is working with 17 meters of gold wire how long is wire in millimeters
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