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April 19, 2014

Homework Help: Science: Scientists

Recent Homework Questions About Scientists

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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
In which time period?
Sunday, April 8, 2012 at 8:10pm

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

Life orientation
Drugs generally work by interacting with receptors on the surface of cells or enzymes (which regulate the rate of chemical reactions) within cells. Receptor and enzyme molecules have a specific three-dimensional structure which allows only substances that fit precisely to ...
Tuesday, March 20, 2012 at 11:56pm

English
As Writeacher is on holiday, I need someone of you, Ms Sue, to check my paragraph. In particular, sentence 1 (?) "he had daydreamed" and sentence 2 (the whole sentence). I really hope you can help me. 1)In Chapter ten Dr Jekyll comes to the realization of the ...
Monday, March 19, 2012 at 9:42am

chemistry
A scientist measures the standard enthalpy change for the following reaction to be -53.4 kJ : Ca(OH)2(aq) + 2 HCl(aq) CaCl2(s) + 2 H2O(l) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(l) is kJ/mol
Sunday, March 18, 2012 at 6:24pm

chemistry
A scientist measures the standard enthalpy change for the following reaction to be -53.4 kJ : Ca(OH)2(aq) + 2 HCl(aq) CaCl2(s) + 2 H2O(l) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(l) is kJ/mol
Sunday, March 18, 2012 at 6:24pm

English
Ms Sue, here is the second and last part, concerning Stevenson's biography. Thank you very much for helping me. 1) Robert Louis Stevenson was born in Edinburgh in 1850. He spent most of his childhood in bed because of his poor health and grew up under the influence of his ...
Sunday, March 18, 2012 at 4:40pm

health
What is a medical scientist,if you want to study medical science,what are the minimum requirements?and how can you briefly describe medical science?
Thursday, March 15, 2012 at 1:31pm

Literacy
13. Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. The Economist and American Scientist C. Odyssey and Natural History D. Astronomy and Science ANSWER IS A
Saturday, March 10, 2012 at 2:08am

scientist
This may help. http://kidshealth.org/kid/talk/qa/what_i​s_gene.html
Tuesday, March 6, 2012 at 6:28am

scientist
WHAT IS GENE?
Tuesday, March 6, 2012 at 5:48am

scientist
KE = 0.5m*V^2 = 11*6^2 = 396 J.
Friday, February 24, 2012 at 7:20pm

scientist
What is the kinestic energy of a bullet of 22kg fire from a gun with a speed of 6m`s
Thursday, February 23, 2012 at 1:15pm

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] 4.1/...
Thursday, February 23, 2012 at 1:05pm

Introduction to Psychology
It is the proper role of a psychological research scientist to: the research.
Tuesday, February 21, 2012 at 9:59pm

Science
Scientist study many factors that allow them to predict weather. Which factor most directly affects the movement of air? a) air pressure; b) precipitation; c) relative humidity; d) temperature
Tuesday, February 21, 2012 at 6:24pm

English
Which of the following publications are both listed under the "Magazines" results? A. Astronomy and Science B. Odyssey and Natural History C. Science News and Earth Island D. The Economist and American Scientist
Saturday, February 18, 2012 at 2:37pm

physics
how do scientist know that the chemical elements here on earth are the same as on the planets in space and not some different elements
Wednesday, February 8, 2012 at 7:56pm

chemistry
who was the first scientist to identify a nuclear bombardment reaction?
Wednesday, February 8, 2012 at 7:12pm

Public Health
http://www.cancer.gov/cancertopics/facts​heet/Risk/BRCA read the questions and answers, they give a clue to implications. It does not take a Rocket Scientist to make the stretch to prostate cancer.
Tuesday, February 7, 2012 at 8:10pm

chemistry
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 550 ml of a solution that has a concentration of Na+ ions of 1.40M ?
Tuesday, February 7, 2012 at 2:38pm

Science 7R - HW Check (PLZ read!)
Compare Lamarck's explantion of evolution with Darwin's theory. My Answer - After scientist collected large amounts of data on the inheritance of characteristics, Lamarck's explanation was rejected. Darwin's developed the theory of evolution still accepted ...
Monday, February 6, 2012 at 5:37pm

science
for space they need space suit, warm clothes underneath, space helmet, test tubes, oxygen tanks, food, maps and camara's to take pictures for scientist
Wednesday, February 1, 2012 at 10:21pm

science
Imagine that you are the scientist who discovered cells. If you were to give a speech to a group of fellow scientists, what key points would you include that describe your accomplishments? What are some that would help?
Tuesday, January 31, 2012 at 9:32pm

scientist
This one has coem up before http://www.jiskha.com/display.cgi?id=127​0701200
Wednesday, January 18, 2012 at 9:58am

scientist
If all you do is post your entire assignment, with no evidence of thinking on your part, nothing will happen since no one here will do your work for you. But if you are specific about what you don't understand about the assignment or exactly what help you need, someone ...
Wednesday, January 18, 2012 at 9:56am

science
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will ...
Wednesday, January 18, 2012 at 9:51am

scientist
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
Wednesday, January 18, 2012 at 9:44am

Literacy
Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. Astronomy and Science C. Odyssey and Natural History D. The Economist and American Scientist my answer is D
Tuesday, January 17, 2012 at 11:24am

Literacy
1. Journals differ from magazines in that they're A. available by subscription. B. sources of academic research not intended for the general public. C. published only periodically. D. printed with volume numbers. my answer is B 3. It's important to include references ...
Monday, January 16, 2012 at 2:59pm

science
Since the phenic system is not empirical, I doubt if a scientist would use it at all. http://www.google.com/search?client=safa​ri&rls=en&q=%22phenic+system%22&ie=UTF-8​&oe=UTF-8
Monday, January 16, 2012 at 11:30am

science
Describe how a scientist using the phenic system would classify an organism.
Sunday, January 15, 2012 at 6:43pm

scientist
See the many links below under Related Questions.
Thursday, January 12, 2012 at 6:34pm

scientist
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
Thursday, January 12, 2012 at 6:25pm

Math
A scientists income over 3 years was $72,000, $76,000, and $77,000. He won an award the next year, so his income was $1,080,000. By how much does the outlier increase the scientist mean annual income? Pleas help me and work out the problem
Tuesday, January 10, 2012 at 9:04pm

English
Thank you very much for your corrections. Here are some more sentences I'd like you to check. 1) An example of a desolate place is Frankenstein’s laboratory, where the scientist is confined in order to create the monster. 2) Frankenstein is not set in a dark castle ...
Sunday, January 8, 2012 at 5:54pm

scientist
The different strain might be a confounding variable. http://www.google.com/search?client=safa​ri&rls=en&q=Medical+terminology&ie=UTF-8​&oe=UTF-8
Wednesday, December 28, 2011 at 1:27pm

scientist
See the answers below in Related Questions.
Tuesday, December 27, 2011 at 4:26pm

scientist
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
Tuesday, December 27, 2011 at 4:22pm

chemistry
A scientist collects a sample of carbon dioxide that contains 1.5 x 1025 molecules of CO2. In grams, what is the mass of the sample?
Tuesday, December 20, 2011 at 1:09pm

scientist
A) the experiment could be repeated with the same mice
Sunday, December 18, 2011 at 3:31pm

scientist
Check the Related Questions below.
Saturday, December 17, 2011 at 10:42pm

scientist
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
Saturday, December 17, 2011 at 10:37pm

English 7
Perseverance What is perseverance? Perseverance is commitment, hard work, patience, endurance. Perseverance is being able to bear difficulties calmly and without complaint. Perseverance is trying again and again. You show perseverance when you ... Give up your tv time to spend...
Thursday, December 15, 2011 at 3:43pm

English
I left out the last two sentences. Thank you. 1) Walton is the double of Frankenstein since he manifests the same ambition, the wish to overcome (go beyond is possible?) human limits in his travelling towards the unknown. 2)Frankenstein and his creature are complementary: they...
Tuesday, December 13, 2011 at 3:10am

science
who would be considered to be the "first ocean scientist"?
Sunday, December 11, 2011 at 2:57pm

Chemistry
A researcher is studying the decomposition of A as shown by the general reaction below: 2 A(g) 4 B(g) + 2 C(g) Initially, the scientist fills an evacuated 1.772 L flask with 3.710 x 10-1 moles of species A. Upon equilibrium, it is determined that the concentration of A is 4....
Friday, December 9, 2011 at 8:08pm

scientist
With a minimum of three observations, at least several days apart, it is possible to establish the "orbit elements" and predict the appearance of future returns of the comet (if any). Many comets appear only once. Those are the ones with hyperbolic rather than ...
Thursday, December 1, 2011 at 4:53pm

scientist
How could measuring the orbit of a comet help scientists understand when it will next be visible from earth
Thursday, December 1, 2011 at 4:46pm

English
Which element of a short story would be most important to a story about a mad scientist stealing a secret weapon?
Thursday, December 1, 2011 at 2:43pm

English
Which of the following publications are both listed under the "Magazines" results? A. Astronomy and Science B. Odyssey and Natural History C. Science News and Earth Island D. The Economist and American Scientist
Tuesday, November 29, 2011 at 1:52pm

scientist
http://www.jiskha.com/display.cgi?id=128​4155278
Monday, November 28, 2011 at 1:18pm

scientist
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
Monday, November 28, 2011 at 1:08pm

Physics
A weight with mass m lies on a surface with no friction. The weight is also connected to a spring with springconstant k and then the weight is driven with outer force F(t)=F0sin(Ωt). There is a friction in the spring and he‘s described with –bv(t). With a help ...
Wednesday, November 16, 2011 at 9:51am

history
He was not a nuclear scientist, Song Jong was and is a very famous control engineer. https://webspace.utexas.edu/hl4958/conte​mporary-chinese-history/Greenhalgh%20-%2​0Science,%20Modernity,%20and%20the%20Mak​ing%20of%20China%27s%20One-Child%20Polic​y....
Tuesday, November 15, 2011 at 4:07pm

algebra
a scientist has a 25% acid solution.how many liters of each does the scientist need to make 15L of a solution that is 28%.write a system of equations and solve using any method.
Thursday, November 10, 2011 at 12:48am

Introduction to 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...
Tuesday, November 8, 2011 at 8:34pm

scientist
I would advise you to start by learning to write chemical formulas correctly. It is very important whether letters are capitalized or not. Your chemicals are HCl and Na2CO3. There is no such thing as NaCO3 (The numbers are subscripts but we can't type subscripts here) <...
Tuesday, November 8, 2011 at 8:03pm

scientist
http://www.sabic.com/me/en/productsandse​rvices/chemicals/causticsoda.aspx
Tuesday, November 8, 2011 at 7:58pm

scientist
so how do you handle caustic items
Tuesday, November 8, 2011 at 7:47pm

scientist
http://www.thefreedictionary.com/caustic​
Tuesday, November 8, 2011 at 7:45pm

scientist
what is caustic mean because hcl is caustic
Tuesday, November 8, 2011 at 7:43pm

scientist
Try some of the following links for information: 1. http://search.yahoo.com/search?fr=mcafee​&p=background+information+for+the+stoich​iometry+lab+involving+hcl+and+naco3+ 2. http://search.yahoo.com/search?fr=mcafee​&p=difference+between+strong+%26+weak+ac&#...
Tuesday, November 8, 2011 at 7:24pm

scientist
and what is the difference between stron and weak acids and bases
Tuesday, November 8, 2011 at 6:49pm

scientist
what are some background information for the stoichiometry lab involving hcl and naco3
Tuesday, November 8, 2011 at 6:32pm

Introduction to 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...
Tuesday, November 8, 2011 at 11:05am

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, November 7, 2011 at 1:25pm

political science
In need of help on my political science homework please help with these questions Only these questions left! One reason why the US has only 2 major parties is that it has: A. insufficient opportunities to bribe candidates B. too much involvement by religious groups C.single-...
Sunday, November 6, 2011 at 3:59pm

PLZ ANSWER CHEM QUESTION
a chemist reacted 64 grams of Ru with O2. This reaction produced 160 grams of ruthenium oxide and 4 grams of leftover O2. How much of the reactants would this scientist need to make 320 grams of the product with no leftover O2? Ru + O2 = RuO2 + O2 leftover
Thursday, November 3, 2011 at 10:29pm

Science
-What is Pot of Gold? -What did inferences could scientist make from Pot of Gold on Mars?
Wednesday, November 2, 2011 at 9:01pm

Chemistry
A mettallurgist decided to make a special alloy. He melted 30 grams of Au(Gold) with 30 grams of Pb. This melting process resulted to 42 grams of an Au-Pb alloy and some leftover Pb. This scientist wanted to make 420 grams of this alloy with no leftovers of any reactants. how ...
Monday, October 31, 2011 at 8:53am

science
A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 350 of a solution that has a concentration of ions of 0.500 ?
Friday, October 28, 2011 at 10:58pm

Science
Already saw site became more confused. Ind. Var is the one thing the scientist changes could mean...the solution is changed by me and the potato changes because of me?
Wednesday, October 26, 2011 at 12:03pm

computer science
Hi what are mutator and accessor methods and what is the difference
Tuesday, October 25, 2011 at 10:05pm

science
If a scientist changes two variable he/she would not know which change would increase or decrease his/her theory or hypothesis. The scientist wants to determine one thing that changed it the most not two things!
Sunday, October 23, 2011 at 6:49pm

science
Try some of the following links for information: http://search.yahoo.com/search?fr=mcafee​&p=why+do+scientist+only+change+one+vari​eble+at+a+time+during+a+experiment+%3F+ Sra
Friday, October 21, 2011 at 2:12am

science
why do scientist only change one varieble at a time during a experiment ?
Thursday, October 20, 2011 at 10:29pm

scientist
genetic differences would not affect the outcome of the test
Friday, October 14, 2011 at 8:01am

Chemistry
A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 625 of a solution that has a concentration of ions of 0.800
Thursday, October 13, 2011 at 5:04pm

chemistry
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 400 mL of a solution that has a concentration of Na+ ions of 1.00 M?
Thursday, October 13, 2011 at 1:59pm

Physical Science
True or False. To a scientist, work is done when a force is exerted through a distance.
Tuesday, September 27, 2011 at 5:31pm

science
a scientist has two samples of a substance. both samples have the same temperature. one sample has a mass of 10 g. the other sample has a mass of 20 g. compare the average kinetic energy and total kinetic energy of the particles in each sample.
Monday, September 26, 2011 at 7:54pm

REGENTS(PRACTICE)
A scientist wants to determine the best conditions for hatching brine shrimp eggs. In a laboratory, brine shrimp hatch at room temperature in glass containers of salt water. The concentration of salt in the water is known to affect how many brine shrimp eggs will hatch Design...
Wednesday, September 21, 2011 at 4:41pm

scientist
Is that a statement or a question? Try some of the following links on conducting: http://www.google.com/search?q=what+is+c​onducting+for+a+scientist+doing+an+exper​iment&ie=utf-8&oe=utf-8&aq=t&rls=org.moz​illa:en-US:official&client=firefox-a#hl=​en&...
Tuesday, September 20, 2011 at 8:44pm

scientist
scientists do their experimental tests more than once,so they can reduce the effects of chance errors.This is called conducting
Tuesday, September 20, 2011 at 7:57pm

dayli science
write one or two sentences that contain these words:hypothesis,solutin,prolem,scientis​t
Tuesday, September 20, 2011 at 2:32pm

Science
One set of chemical symbols means that every science student and scientist -- no matter what languages they speak -- can identify these chemicals.
Thursday, September 15, 2011 at 7:27pm

scientist
They do experiments to test hypotheses.
Wednesday, September 14, 2011 at 5:48pm

scientist
why do scientists do experiments
Wednesday, September 14, 2011 at 4:56pm

science
what options does a scientist have if his expiriment does not support the hypothesis
Tuesday, September 13, 2011 at 5:50pm

scientist
None.
Sunday, September 11, 2011 at 1:37pm

scientist
Which of the following BEST describes the theory of natural selection?
Sunday, September 11, 2011 at 1:21pm

Social Studies
A geographer is a scientist whose area of study is geography, the study of Earth's physical environment and human habitat. Though geographers are historically known as people who make maps, map making is actually the field of study of cartography, a subset of geography. ...
Sunday, September 11, 2011 at 12:21pm

English
Be sure to bookmark this website and use it when you need explanations on specific English grammar/usage topics: http://www.englishclub.com/grammar/index​.htm You are asking about two different verbs -- forms of "to be" and forms of "to be able" I am ...
Friday, September 9, 2011 at 2:33pm

science
what is the 14 letter word called conducting ____________, its when scientist reduce effects for chance errors.
Wednesday, September 7, 2011 at 10:43pm

9th grade Science (Biology)
i wont u to give me 10 sentence telling me what scientist study
Tuesday, September 6, 2011 at 9:21pm

scientist
There would be no other variable than food or no food. Sra
Sunday, September 4, 2011 at 9:16pm

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