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October 25, 2014

Homework Help: Science: Scientists

Recent Homework Questions About Scientists

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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

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

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

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

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

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
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

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

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
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
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
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
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 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
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

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

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
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

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

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

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

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 ...
Sunday, September 4, 2011 at 8:38pm

Biology
1. A medical scientist is designing an experiment to test the results of a new drug that she hypothesizes will greatly reduce and possibly eliminate the side effects of a new cancer treatment. If this experiment is to be set up correctly, she must (A) divide the patients into ...
Wednesday, August 31, 2011 at 9:46pm

science
scientist do their experimental test more than once so they can reduce the effects of chance errors this is called conducting what
Wednesday, August 31, 2011 at 7:35pm

scientist
Which is the best reason for the smaller number of drone bees compared to the number of worker bees in a beehive?
Saturday, August 27, 2011 at 10:00am

Literacy 4
Please check my work. Thank you. 1. Government documents in a library are classified according to which of the following schemes? A. Superintendent of Documents B. Government Printing Office C. Dewe Decimal D. Library Of Congress Answer #1 is A 2. You're using the ...
Friday, August 26, 2011 at 1:33pm

psychology
HYPOTHETICAL EXPERIMENT: You, as an eager young behavioral scientist, have noted that many people don't wash their hands when they are in a public rest room, unless there is someone there who they believe is watching them. Because you are very aware of the public health ...
Thursday, August 18, 2011 at 7:26pm

scientist
How do I turn up the sound on a stereo without turning the volume button up?
Monday, August 15, 2011 at 8:19pm

History
Can some one help me with these questions? Because Japan was hit by the worldwide economic depression in the 1930s, military leaders were able to gain power. Question 1 answers True False Question 2 text Question 2 After Japan withdrew from the League of Nations they aligned ...
Tuesday, August 9, 2011 at 7:20pm

biology
A scientist wishes to determine how effective a vaccine is in protecting rats against a contagious disease. What experimental procedure should the scientist use to determine the vaccine's effectiveness?
Sunday, July 31, 2011 at 5:41pm

scientist
What is the law which states that volume and temperature are directly related?
Monday, July 25, 2011 at 7:56am

Math
Suppose a scientist on Earth throws a baseball upward. The scientist lets go of the ball 2 meters above the ground with an initial velocity of 10 meters per second. How long does it take for the ball to hit the ground (H=0)? (Use the quadratic formula to solve this problem, ...
Sunday, July 24, 2011 at 2:49pm

science
which of the following topics involving bees would an environmental scientist consider to be the most important ? 1. the effects of insecticides on bees and subsequently the pollination of agricultural crops 2. the amount of honey production needed for export to another ...
Monday, July 11, 2011 at 2:15pm

English - Native speakers
Can we say : Scientist have a little hope of finding a cure for cancer or little hope.Can we say both? A little means positive and little negative
Thursday, June 23, 2011 at 10:19am

English
Can you please check if these sentences are correct? In particular, I'd like you to help me find an introductory sentence to my paragraph and a proper conclusion (with reference to the theme of the double). 1) Explore the theme of the double as it occurs in the works of ...
Monday, June 20, 2011 at 11:29am

scientist
What is the effect of the temperature. Outside on attendance at westside
Wednesday, June 15, 2011 at 10:23am

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...
Sunday, June 5, 2011 at 7:50pm

English
can someone overlook my answers to help with the questions that are wrong at let me know which ones are right. Bold = my answers I chose (right) Wind can create alterations in the surface layers of rock. Wind Is one cause of erosion. Which of these sentences combines the ...
Tuesday, May 31, 2011 at 8:32pm

chemistry
now lets say that this scientist wants to make 50 mL of a 0.250 M KC solution. How much of the 1.00 M "stock" solution whould he use
Wednesday, May 25, 2011 at 4:54pm

chemistry
suppose that a scientist needs to make 100 mL of a 1.00 M solution. What mass of solid KC needs to be used
Wednesday, May 25, 2011 at 4:53pm

grammar
proper adjectives how do you put these proper adjectives in sentences. 1. a hearing in Congress 2. an ancient theater in Greece 3. the moons around Mars 4. beaches in Israel 5. a scientist from England 6. a colorful scene in Paris 7.the people of Sudan 8.teachings of Islam 9. ...
Friday, May 13, 2011 at 8:00pm

chem
A scientist wants to make a solution of potassium phosphate, K3PO4 for a lab experiment. How many grams of K3PO4 will be needed to produce 575ml of a solution that has a concentration of K+ ions of 1.4M.
Tuesday, May 10, 2011 at 11:04am

english
(I need to complete an out line with a introduction and a thesis sentence or statement but I can find what I am looking for here is the article) This question expresses a commonly held (by women) negative stereotype about guys of the male gender, which is that they cannot find...
Saturday, May 7, 2011 at 2:50pm

biology
14 points Save A photosynthesis experiment uses Chlorella to track the route taken by 14C in photosynthesis. The 14C is provided from CO2 and no new sources of CO2 are available. After the experiment the scientist extracts all of the starch produced and analyses the Carbon ...
Saturday, May 7, 2011 at 9:01am

science - biology
A photosynthesis experiment uses Chlorella to track the route taken by 14C in photosynthesis. The 14C is provided from CO2 and no new sources of CO2 are available. After the experiment the scientist extracts all of the starch produced and analyses the Carbon present. She ...
Saturday, May 7, 2011 at 8:57am

english
ndicate whether a sentence is a run-on or correct. If the sentence is a run-on, correct it using your knowledge of coordination and subordination. 1. My mother is very politically conservative; she’s written in King George III for president in the last two elections. 2. ...
Friday, April 29, 2011 at 9:22pm

scientist
how can u help me with terrestrial and aquATIC BIOMES
Monday, April 25, 2011 at 10:12pm

reading
what this the answer for this question We can conclude from paragraph a)theories are often revised. b)theories are never modified. c)theories are always changed. d)theories are mostly illogical. The concept that the Earth is a sphere can be traced back 2,500 years to the Greek...
Tuesday, April 19, 2011 at 5:56pm

scientist
what is ensebles?
Saturday, April 16, 2011 at 6:47am

english
Which element of a short story would be most important to a story about a mad scientist stealing a secret weapon?
Wednesday, April 6, 2011 at 7:18pm

chemistry
A scientist wants to make a solution of tribasic sodium phosphate, \rm Na_3PO_4, for a laboratory experiment. How many grams of \rm Na_3PO_4 will be needed to produce 250 mL of a solution that has a concentration of \rm Na^+ ions of 0.600 \it M?
Wednesday, March 30, 2011 at 6:47pm

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 500 mL of a solution that has a concentration of Na+ ions of 0.700 M
Sunday, March 27, 2011 at 5:25pm

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