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September 17, 2014

Homework Help: Science: Scientists

Recent Homework Questions About Scientists

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physics
An instrument-carrying projectile of mass m1 accidentally explodes at the top of its trajectory. The horizontal distance between launch point and the explosion is xm. The projectile breaks into two pieces which fly apart horizontally. The larger piece, m3, has three times the ...
Friday, October 25, 2013 at 8:23pm

PHYSICS
An instrument-carrying projectile of mass m1 accidentally explodes at the top of its trajectory. The horizontal distance between launch point and the explosion is xm. The projectile breaks into two pieces which fly apart horizontally. The larger piece, m3, has three times the ...
Friday, October 25, 2013 at 7:52pm

physics
An instrument-carrying projectile of mass m1 accidentally explodes at the top of its trajectory. The horizontal distance between launch point and the explosion is xm. The projectile breaks into two pieces which fly apart horizontally. The larger piece, m3, has three times the ...
Friday, October 25, 2013 at 11:31am

biology
Evidence suggests that bacteria supplied with a cup of sugar could run a 60-watt light bulb for 17 hours. What would a scientist need to do to be able to affirm this scientific idea? is it to conduct an experiment to test the hypothesis
Thursday, October 17, 2013 at 7:24pm

biology
Evidence suggests that bacteria supplied with a cup of sugar could run a 60-watt light bulb for 17 hours. What would a scientist need to do to be able to affirm this scientific idea? is it to conduct an experiment to test the hypothesis
Thursday, October 17, 2013 at 7:18pm

Practical English
This is my second time taking this exam this is the last one so I can graduate here is what I think the answers are. If you see any mistakes please help. 1. Choose the sentence in which the verb is a linking verb. A. He works at a gas station. B. His boss pays him well. (C.) ...
Monday, October 7, 2013 at 4:00pm

Science
A scientist goes to a large international conference and hears about a new discovery. The scientist is very excited about these new findings and decides to verify the other scientists’ results by conducting her own investigations. The scientist is being open-minded but ...
Thursday, October 3, 2013 at 9:59am

Grade 12 University Chemistry
Hi, i have a project for chemistry, i have to choose a scientist (i chose Micheal Smith) his career is biochemistry and i have to create a career related to biochemistry.. Question: After finding the famous chemist and then using their field of chemistry, create a career that ...
Saturday, September 28, 2013 at 1:10pm

grd 12 U chemistry
Hi, i have a project for chemistry, i have to choose a scientist (i chose Micheal Smith) his career is biochemistry and i have to create a career related to biochemistry.. Question: After finding the famous chemist and then using their field of chemistry, create a career that ...
Saturday, September 28, 2013 at 9:58am

Science
1) Which of the following is a valid reason why a scientist might reject a scientific theory? (1point) Some people disagree with it. It covers too broad a topic. New evidence contradicts it.*** It is too old. 2) A scientific hypothesis must be (1point) Correct Able to be ...
Thursday, September 26, 2013 at 2:35pm

Chem
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 650mL of a solution that has a concentration of Na+ ions of 1.50M ? Explain answer with three significant figures and ...
Wednesday, September 25, 2013 at 10:34pm

Math
A certain bacteria doubles the number of its cells every 20 minutes. A scientist puts 50 Cells in a culture disk. How many cells will be in the culture disk in 2 hours?
Tuesday, September 24, 2013 at 2:48am

science
A scientist observes chimps putting dry leaves into a hole in the tree. The leaves come out wet and the chimps lick the water off of the leaves. The scientist reasons that there is water inside the tree. This reasoning is called what?
Monday, September 16, 2013 at 2:57pm

science
A scientist goes to a large international conference and hears about a new discovery. The scientist is very excited about these new findings and decides to verify the other scientists' results by conducting her own investigations. The scientist is being open-minded but ____
Monday, September 16, 2013 at 2:53pm

science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable...
Thursday, September 12, 2013 at 12:06pm

Science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable...
Thursday, September 12, 2013 at 9:45am

Science
1)A scientist at a chemical company designs and conducts an experiment to determine if a chemical made by the company is harmful to crops. To do this, he sprays the chemical on three plants he has in the laboratory. None of the plants survive. The scientist reports that the ...
Wednesday, September 11, 2013 at 11:07pm

science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable...
Wednesday, September 11, 2013 at 10:21pm

Science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable...
Wednesday, September 11, 2013 at 7:03pm

la need help
1. When you summarize an informational article, you should (1 point) leave out minor details. use the author's words, including direct quotations. leave out important details. include as much information as possible. 2. Why might a scientist choose to categorize scientific...
Thursday, September 5, 2013 at 10:24am

Science
What resources should a scientist use to research water pollution?
Wednesday, August 28, 2013 at 8:44pm

chemistry
A scientist makes 300.0 mL of an acetate buffer using [CH3COOH]o=[NaCH3COO]o= 0.075 M. How many mL of 5.0 M NaOH can be added before its buffering capacity is exhausted?
Monday, August 5, 2013 at 10:51pm

Sociology
In Chapter 2 of the textbook, the author describes meanings for the concept of socio-economic class and analyzes how perceptions of justice may be influenced by class distinctions in American society (see Section 2.4). He also references the related views of two provocative ...
Thursday, July 18, 2013 at 6:25pm

Physics**Scientist
Please help me with this!! I really can't find it. 1) This scientist used his device by dropped a spool of wire through a magnetic field. 2)This scientist used a torsional balance to show that the magnetic repulsion between magnetic poles varied by the square of the ...
Thursday, May 30, 2013 at 6:32pm

physics
if a scientist working with electromagnetic radiation has detected a frequency of 2.8X10^10Hz for one of the waves, what is the wavelength of this radiation wave?
Thursday, May 30, 2013 at 6:31pm

Psychology
As a scientist, Carl is concerned with the intensity of lights in the modern human environment. In his research project, Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed. Group B will sleep in total...
Monday, May 20, 2013 at 4:10pm

science
A scientist experiments on two different pairs of objects. During the experiment, the objects in one of the pairs are brought into contact with each other; the objects in the other pair are brought close together, but they do not touch. The scientist then compares the number ...
Saturday, May 18, 2013 at 6:45pm

science
A scientist experiments on two different pairs of objects. During the experiment, the objects in one of the pairs are brought into contact with each other; the objects in the other pair are brought close together, but they do not touch. The scientist then compares the number ...
Friday, May 17, 2013 at 1:54pm

Psychology
As a scientist, Carl is concerned with the intensity of lights in the modern human environment. In his research project, Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed. Group B will sleep in total...
Friday, May 10, 2013 at 9:36am

Psychology
As a scientist, Carl is concerned with the intensity of lights in the modern human environment. In his research project, Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed. Group B will sleep in ...
Wednesday, May 8, 2013 at 11:00pm

Physics
To measure how far below the ocean surface a bird dives to catch a fish, a scientist uses a method originated by Lord Kelvin. He dusts the interiors of plastic tubes with powdered sugar and then seals one end of each tube. He captures the bird at nighttime in its nest and ...
Sunday, May 5, 2013 at 8:23am

statistics
Linda Silbers is a social scientist studying voter opinion about a city bond proposal for a light rail mass transit system in Denver If Linda wants to be 90 percent Confident that her sample estimate of the proportion of voters who favor the bond is within 2 percent of the ...
Thursday, May 2, 2013 at 9:35pm

Physics *Electrical Scientist* please help me!!!
* JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
Saturday, April 20, 2013 at 3:32pm

Physics *Electrical Scientist* Please help me!!
* JJ Thompson * * what was he credited for discovering the cathode ray tube? * How does his experiment relate to electrostatics? >>PLease help me!!!! :)
Saturday, April 20, 2013 at 7:57am

Physics *Electrical Scientist* please help me!!!
* JJ Thompson * what was he credited for discovering the cathode ray tube? * How does his experiment relate to electrostatics? >>PLease help me!!!! :)
Friday, April 19, 2013 at 6:03pm

language arts
During the lecture at Florida state, the audience of scientist was curious about how the guest speaker would treat the topic of life on other planets Q : what is the meaning of the word treat at is used in the sentence? A : To pay another persons expenses B : to deal with a ...
Tuesday, April 9, 2013 at 7:33pm

language arts
During the lecture at Florida state, the audience of scientist was curious about how the guest speaker would treat the topic of life on other planets Q : what is the meaning of the word treat at is used in the sentence? A : To pay another persons expenses B : to deal with a ...
Tuesday, April 9, 2013 at 3:07pm

language arts
During the lecture at Florida state, the audience of scientist was curious about how the guest speaker would treat the topic of life on other planets Q : what is the meaning of the word treat at is used in the sentence? A : To pay another persons expenses B : to deal with a ...
Tuesday, April 9, 2013 at 2:40pm

Science ms sue please help
A horse and a donkey can mate with each other. Their offspring,called a mule, is not fertile. Do horses and donkeys belong to the same species? Explain your answer. A scientist collects wild rabbits that live at sea level and moves them to the mountains. One year later, the ...
Monday, April 8, 2013 at 5:20pm

Math
A scientist is mixing a chemical solution for an experiment. The solution contains 3/8 ounce of a chemical and 1/6 ounce saline solution. What is the unit rate of chemical to saline solution?
Friday, April 5, 2013 at 4:38pm

anatomy physiology/check please
Muscular dysgenesis or dysgeny is a lethal, recessive, genetic disease of mice that is caused by a mutation in the mdg gene. Skeletal muscles from dysgenic mice are paralyzed and the animals die shortly after birth. You are a research scientist interested in the finding the ...
Thursday, April 4, 2013 at 2:44pm

english
Which word or phrase is an appositive in the sentence? When Sandy met John—a scientist and critic—she fell in love with him.
Wednesday, April 3, 2013 at 9:04am

Psy202
After hearing about some possible causes of sneezing, a scientist decides that room fresheners are the most common cause. What is the term that describes the scientist thinking
Friday, March 29, 2013 at 2:14am

Science
1. To a scientist, a river is a kind of stream. True or False. 2. All streams carry sediment. T/F. 3. A delta keeps growing. T/F. 4. Heavy rain always cause flooding. T/F. 5. A river bank is at the end of a river. T/F.
Monday, March 25, 2013 at 6:52pm

Physics
The ultracentrifuge is an important tool for separating and analyzing proteins in biological research. Because of the enormous centripetal accelerations that can be achieved, the apparatus must be carefully balanced so that each sample is matched by another on the opposite ...
Sunday, March 24, 2013 at 9:59am

Management Science
Riverside oil company in eastern Kentucky produces 3 different grades of gasoline. They are regular, premium, and supreme grades. Each barrel of regular grade sells for $82 while premium grade sells for $88 per barrel and supreme grade sells for $89 per barrel. Petroleum ...
Monday, March 18, 2013 at 11:01am

Math
A committee, which consists of two mathematicians and three scientists, will be formed from four mathematicians and six scientists. How many possible committees can be formed if : a. any of the mathematicians and scientists are included? b. one particular scientist must be in ...
Thursday, February 21, 2013 at 4:15am

english
We have to rewrite this correcting fragments and run on sentences can someone check my work below the original. Scientists report (1) that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the deep sea. Creatures in ...
Monday, February 18, 2013 at 11:19am

physical science
a scientist found a fossilized bison. using Carbon-14 dating, she found that the fossil was about 45,840 years old. Carbon-14 has a half-life of 5730 years. how many half-lives have passed?
Sunday, February 17, 2013 at 4:59pm

English
Hello. Thanks for the previous answers. Please have a look at the context, and say if it's OK (I'm afraid it's again stilted (the way you say): "He is a well-known scientist with a very good reputation; there are good responses to him in the academic world and...
Wednesday, February 13, 2013 at 6:45pm

English
Hello again. Will you please help me with a few more questions? 1)Which word order is correct: a)he was accused of taking bribes by his colleagues or b) he was accused by his colleagues of taking bribes? 2)Do you think it's possible to say: "there are good responses ...
Wednesday, February 13, 2013 at 5:33pm

chemistry
The scientist has an IR spectrometer in her lab. She acquires an IR spectrum of compound X and finds a relatively weak intensity absorption at ~2100 cm-1 and some medium to strong absorptions in the 2850~2960 cm-1 region plus a strong absorption at 3300 cm-1. Identify the type...
Sunday, February 10, 2013 at 9:29pm

Just some LA q's, Ms.Sue please
1. When you summarize an informational article, you should (1 point) leave out minor details. use the author's words, including direct quotations. leave out important details. include as much information as possible. 2. Why might a scientist choose to categorize scientific...
Thursday, February 7, 2013 at 2:47pm

chemistry
A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occurred during his experiment? The powder catches on fire. The powder releases bubbles. The powder heats up. The powder breaks apart into smaller ...
Thursday, February 7, 2013 at 10:02am

psychology
When you make the comment, "I don't know," in the course of a discussion, this indicates that you: A. have a tolerance for uncertainty. B. are an empirical scientist. C. are evasive and opposed to further inquiry. D. accept your own ability.
Sunday, January 27, 2013 at 6:57am

Chemistry
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 155 cal/g. The scientist observing the extraterrestrial life form also ...
Friday, January 25, 2013 at 10:11am

earth
#37 whenever scientist carefully measure any quantity many times they expect that: a. all the measurements will be exactly the same b. only two of the measurements will be exactly the same c. all but one of the measurements will be exactly the same d. the measurements will be ...
Sunday, January 13, 2013 at 3:47pm

Science
Compare the nature greenhouse effect process with the human induced. 2. What are the greenhouse gases? Which one is the biggest concern? 3. What are scientists doing to collect data? 4. What role does the carbon cycle play in this problem? 5. What are the political and ...
Thursday, January 10, 2013 at 10:11am

Living things Science
The factor that a scientist changes in a controlled experiment is the _____________ Please help :]
Tuesday, January 8, 2013 at 8:01pm

US History
What impact did Benjamin Franklin have on American life and culture? Role: Contribution to American Life and Culture? Statesman:______________________________​_______ Scientist:______________________________​_________ Diplomat:_______________________________​...
Sunday, January 6, 2013 at 6:21pm

science
A scientist collects a sample of carbon dioxide that contains 25 moles of CO2. In grams, what is the mass of the sample?
Thursday, December 20, 2012 at 1:01pm

English
30. What role do women seem to have in the traditional culture? A.)respected and protected B.)ignored C.)treated as servants D.)loved and feared 31. Light humor and understated irony are evident in “The Pig.” What other word might describe the tone? A.)empathy B.)...
Monday, December 17, 2012 at 11:57pm

Biology
Suppose you are a scientist trying to help people who cannot produce an enzyme needed for proper digestion. How could you use genetic engineering techniques to make transformed bacteria that produce the enzyme?
Monday, December 17, 2012 at 5:17pm

Chemistry;Check?!
Can you check these? Strong attractive forces that keep atoms connected together are called _____. A. valence electrons B. chemical bonds C. cations D. anions Which of the following is NOT a type of bonding that occurs between atoms? A. covalent bonding B. metallic bonding C. ...
Friday, December 14, 2012 at 12:54pm

English - ms. sue
Ms. Sue, my sister write out story here it is. On Monday she looked in her mailbox, although she had no reason to expect a letter so soon. But there it was, a small, square car. She held it in her two hands, testing its weight. It was an invitation to an exhibition of drawings...
Thursday, December 6, 2012 at 8:46pm

scientist
what is the therms " average atomic mass is a .............. average ,and so is calculated from a" normal " average?
Thursday, December 6, 2012 at 5:24pm

Adult Development and life Assessment
After hearing about some possible causes of sneezing, a scientist decides that room fresheners are the most common cause. What is the term that describes the scientist thinking 1. Hypothesis 2. Scientific method 3. Cognitive dissonance 4. Social influence
Saturday, November 24, 2012 at 3:19pm

chemistry
A scientist isolates a gaseous compound. Is the compound ionic or covalent? Why?
Thursday, November 8, 2012 at 1:06am

science
although each place on earth has its own climate,they can be grouped based on certain overall characteristics.what are the keys factors that scientist use to determine the climate of a particular place
Thursday, November 1, 2012 at 5:31pm

scientist
how could measuring the orbit of a comet help scientists understand when it will next be visible on Earth?
Wednesday, October 24, 2012 at 7:11pm

chemistry
A scientist measures the standard enthalpy change for the following reaction to be -2923.0 kJ : 2C2H6(g) + 7 O2(g) 4CO2(g) + 6 H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO2(g) is _________
Wednesday, October 24, 2012 at 12:42am

engineering
A string is fit snugly around the circumference of a spherical hot air balloon. More hot air is added (probably by a prominent scientist’s lecture) and it now takes an additional 12.4 feet of string to fit around the circumference. What is the increase in diameter?
Wednesday, October 17, 2012 at 4:43pm

Lang Arts
Select the letter that corresponds to the word or words that the italicized phrase modifies or describes. 9. The scientist Jane Goodall was born (in London) in 1934. a. in 1934 b. Jane Goodall c. scientist d. was born 10. In her twenties, she began her life’s work, (the ...
Tuesday, September 25, 2012 at 5:13pm

english
Which of the following choices best describes the error in this sentesce? The man is a scientist with a keen sence of observation and who dedicates long hours in the lab. A Misplaced modifier B Fragment C Dangling modifier D Uneven parallelism I chose D
Monday, September 24, 2012 at 6:09pm

science
scientist do experimental tests more than once
Friday, September 21, 2012 at 4:13pm

English
A good scientist must have a keen mind an unqhenchable curiousity and a (groundless disinterested) desire to discover the truth disinterested? Ms.Sue you told me it should be maximum but groundless and disinterested are the only options. So is my answer still correct?
Tuesday, September 18, 2012 at 8:55pm

English
Word bank: Adverse arid assailant billow confront constrain contemporary depict disinterested encompass groundless hypocrite incomprehensible manipulate maximum mimic ruffle serene sheepish stamina If you (billow confront) your problems honestly and openly instead of trying to...
Tuesday, September 18, 2012 at 7:17pm

English
What is the plural of scientist?
Monday, August 27, 2012 at 5:02pm

scientist
hypothesis
Saturday, August 18, 2012 at 11:59am

sciences
i want to become amember of young scientist association in my school. But for this i must give an idea of any science project . Please help me
Wednesday, July 18, 2012 at 8:45am

Psychology
As a scientist,Carl is concerned with the intensity of lights in the modern human environment.In his research project,Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed.Group C will sleep in their ...
Thursday, July 5, 2012 at 9:09am

science
how do inference help scientist in their discoveries?
Friday, June 29, 2012 at 10:54pm

Biology Lab
Can you please show me how to answer this question using C1V1=C2V2 A scientist receives a vial containing a protein at at concentration of 35mg/ml and is asked to add 0.25ml of it to 6.75mls of Biuret solution. What is the concentration of protein in the Biuret solution in mg/ml?
Sunday, June 17, 2012 at 10:34am

Bio Lab
A scientist receives a vial containing protein at a concentration of 35mg ml -1 and is asked to add 0.25ml of it to 6.75mls of Biuret solution. What is the concentration of protein in the Biuret solution in mkg/ml?
Saturday, June 16, 2012 at 10:02am

Foreign languages
This is the second part of the paragraph. Though I don't think it makes sense at all, I would like you to have a look at it. I added a sentence on nanotechnology I'd like you to check, Writeacher. 1) So this element of the composite torque is not under direct control ...
Tuesday, June 12, 2012 at 5:55pm

Art
Writeacher, could you please check this sentence? Thank you. 1) The scientist could be consider as a “New Prometheus”: like fire, donated by Prometheus, could be for men a great resource, but at the same time a threat if they had not been able to manage it, so the ...
Monday, June 11, 2012 at 7:54am

Foreign languages
Could you please check if this paragraph is possible in scientific English? Thank you, Writeacher. 1) Superconduction consists of a particular physical phenomenon which characterizes only superconductors. 2) These materials become superconductors when they are brought to the ...
Monday, June 4, 2012 at 4:31pm

Science
Thank you very much for you invaluable help, Bob. Here is the last part of the same summary. 1) One of the other prominent scientists involved in the promotion of nanotechnology, Richard Smalley, has accused Drexler of ‘scaring our children’ and promulgating a vision...
Saturday, May 26, 2012 at 4:54am

Science
Here are the other sentences on the same theme I urgently need you to check. I hope you can help me. Thank you. 1) The existence of complex molecular structures present in every living system is used by Drexler to show the theoretical possibility of the design and construction...
Friday, May 25, 2012 at 5:04pm

Science
Bobpursley, could you please check if the following paragraph is written using a correct scientific terminology? Thank you. 1) Nanotechnology is the design, characterisation, production and application of structures, devices and systems by controlling shape and size at ...
Friday, May 25, 2012 at 4:59pm

Chemistry
Why does scientist want to demostrate chemical bonding use models with colored balls to represent atoms. Balls arenot totally accurate. So why does scientist use them?
Wednesday, May 23, 2012 at 1:51am

chemistry
1. name the three fundamental particles present in an atom? mention the masses of the particles in M.K.S. system? 2.what is a proton? stste its relative mass and charge? 3.how many times a proton is heavier than an electron? 4.what important information are furnished about the...
Friday, May 4, 2012 at 9:35pm

scientist
How was the person that discover cells?
Tuesday, April 17, 2012 at 11:34pm

psychology
ASa scientist, Carl is concerned with intensityof lights in the modern human evviroment. In his research project,Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed. Group B will sleep in total ...
Thursday, April 12, 2012 at 10:09pm

scientist
Pretend you are a scientist and you just found a solid substance in the ground where you were digging. What types of tests would you do on this substance? How would you determine if it is a rock or a mineral? Describe your substance (yes you can make something up here that ...
Monday, April 9, 2012 at 9:46pm

scientist
What is biomass energy? the chemical energy stored in living things the electromagnetic energy stored in living things the nuclear energy stored in living things the thermal energy stored in living things Not sure what this one could be
Monday, April 9, 2012 at 9:43pm

scientist
Solar cells convert what type of energy into electrical energy? chemical electromagnetic nuclear thermal Can someone plaese help I believe thermal
Monday, April 9, 2012 at 9:37pm

scientist
Describe the changes in scientific knowledge?
Sunday, April 8, 2012 at 8:04pm

ms.sue 3 grade english
fact and opionion a statement of fact can be proved true or false. a statement of opinion gives someone's thoughts or feelings about something. words that express feelings,such as best and amazing,ate clues that a sentence is probably and opinion. directions- read the ...
Friday, March 30, 2012 at 4:42pm

written analysis
In weeks 1 and 2, via your introduction to the critical thinking process, you are briefly introduced to some of the most powerful and complex questions humans have ever asked: What is truth? What is knowledge? How do you know what you know? In this assignment, you will start ...
Tuesday, March 27, 2012 at 6:28pm

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