Tuesday
June 30, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

Physical science
A 3.0-kg cat runs to the left at 10m/s and a 12-kg dog runs to the right at 4.0m/s what is the total kinetic energy?
Saturday, September 13, 2014 by Rene

Science
5. A team of scientists is testing a new drug on AIDS patients. They expect patients to develop fewer AIDS-related illnesses when given the drug, but they don't expect the drug to cure AIDS. Thought Process: a. What is the independent variable? New drug treatment b. What ...
Saturday, September 13, 2014 by Clare

science
(1.b) Calculate your de Bröglie wavelength and momentum when you are driving a car at a speed of 104 km/hr (~65 mph), assuming your mass is 80 kg.
Saturday, September 13, 2014 by john

Science
If you are riding your bike and hit a curb and stop suddenly at 25m/s when you hit the curb and it took you only .75 seconds to stop after hitting the curb. What was your acceleration?
Saturday, September 13, 2014 by Chris

Physical Science
For questions #14 – 17, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the equation for this ...
Saturday, September 13, 2014 by Amber

Physical Science
Please Help me with this question and example in full details please. Scientists tested the effect of a fertilizer on the growth of plants. They had 2 sets of plants, Group A which gets fertilizer, water and sun and Group B which gets only water and sun (but in equal amounts ...
Saturday, September 13, 2014 by Amber

Science
what is spectral broadening
Saturday, September 13, 2014 by Anonymous

engineering science
An object is kept in equilibrium on an incline by means of supporting force, which is at an angle of 30 degrees o the inclined. The weight of the obbject is 500N. The incline forms an angle of 45 degrees with the horizontal. The coefficent of the friction between the surfaces ...
Saturday, September 13, 2014 by Anonymous

science
Is it possible that free Internet content might one day replace textbooks?
Saturday, September 13, 2014 by a

The Curriculum
What is the best strategy to use when a teacher is providing for learning of physical knowledge as a part of science? A. Give detailed information by telling children about physical knowledge. B. Have someone demonstrate an experiment and debrief. C. Set up the materials and ...
Friday, September 12, 2014 by Daniela

Science
a body rolled on a surface with speed of 10m/s comes to rest after covering distance of 50 m find cofficient of friction
Friday, September 12, 2014 by Sudhanshu

science
Turning on the switch in a flash light starts a chemical reaction in the batteries. The chemical energy is turned to light energy and the flashlight lights up. Which part of this an example of a process?
Friday, September 12, 2014 by jeremiah

Veterinarian assisted
1. In the __________, an animal patient's hair is clipped and its skin is scrubbed to prepare for surgery.  A. hospital ward  B. surgical suite  C. treatment area  D. grooming area  2. Supervision of the treatment area is usually the responsibility...
Friday, September 12, 2014 by Jessica

science
what the heck ms.sue you literally skipped over my question. i've been next to my computer screen waiting for you to answer my question.
Friday, September 12, 2014 by tom

science
if the paramecium overheats, what could happen to the metabolism
Friday, September 12, 2014 by tom

computer science
Using visual logic build a program that asks the user for a whole number, N<100, determine how many quarters, dimes, nickels, and pennies make up N cents with the least amount of coins
Friday, September 12, 2014 by Sarah

Physical Science
Modern oil tankers weigh over a half-million tons and have lengths of up to one-fourth mile. Such massive ships require a distance of 4.8 km (about 3.0 mi) and a time of 22 min to come to a stop from a top speed of 26 km/h. (a) What is the magnitude of such a ship's ...
Friday, September 12, 2014 by Dolly

computer science
The problem is to calculate the usable area in square feet of a house. Assume that the house has a maximum of four rooms, and that each room is rectangular. I need help writing a program description,analysis,test,and with pseuocode with it.
Friday, September 12, 2014 by Michelle

computer science
In the Meteorological institute at Ruritania, one can find the following at Shiaho Railway Station in 2013 • In May 22 days with rainfall totaled 89 mm in that month • In June 1822 days with rainfall totaled 127 mm in that month • In Jule 8 days with rainfall ...
Friday, September 12, 2014 by Tefo sello

computer science
Under the Von Neumann architecture, a program and its data are both stored in memory. It is therefore possible for a program, thinking a me mory location holds a piece of data when it actually holds a program instruction, to accidentally (or on purpose) modify itself. What ...
Friday, September 12, 2014 by Tefo sello

computer science
CSI 16 1 Group Assignment 1 201 3 P age 2 of 6 1. 1. How many milliseconds (ms) are in 1 second? 2. How many microseconds are in 1 second? 3. How many nanoseconds (ns) are in 1 millisecond? 4. How many microseconds are in 1 millisecond? 5. How many nanoseconds are in 1 ...
Friday, September 12, 2014 by Tefo sello

Science (college level)
1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth orbital distance from the ...
Friday, September 12, 2014 by Jason

Science
Identify the dependent and independent variables in the following experiments. 1. Height of bean plants is recorded daily for 2 weeks. 2. Percent absorption by a pigment is measured for red, blue, green, and yellow wavelengths of light. My thought process: 1. a. Dependent: ...
Thursday, September 11, 2014 by Clare

physical science
what causes friction?
Thursday, September 11, 2014 by cassidy

physical science
a bowling ball loses .5kg x m/s momentum as it hits bowling pins. how much momentum do the pins gain? please help
Thursday, September 11, 2014 by cassidy

Atmospheric Science
1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth orbital distance from the ...
Thursday, September 11, 2014 by Rebekah

Science
What is spectral broadening, Quasars, and the Expansion theory
Thursday, September 11, 2014 by Coleson

science
Suppose that a biologist states that the average height of undergraduate students at your university is 205 cm plus or minus a standard deviation of 17 cm. What does this mean? Does it mean that the height of undergraduates at the university ranges from 17 cm less that the ...
Thursday, September 11, 2014 by Kimmie

Science
So what would you find something in the house? Product Symbols Precaution One example would be appreciated
Thursday, September 11, 2014 by Sally

science
If you had an object that measured 4.0 cm for width,and 4.5 cm for height.how would you calculate the volume for this object?
Thursday, September 11, 2014 by said

Science
What is red shifting and blue shifting
Thursday, September 11, 2014 by Coleson

Science
What is a protostar
Thursday, September 11, 2014 by Coleson

Science
What is apparent brightness and absolute brightness in Science
Thursday, September 11, 2014 by Coleson

Science - Please Check My Four Answers
Please help me with the following questions: 1. Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but now I think the ...
Thursday, September 11, 2014 by Brady

science
Which of the following is a good study habbit.
Thursday, September 11, 2014 by Anonymous

Science
What is the first step in the scientific method? (I WAS ABSENT DURING LESSON) A- Observation B- Hypothesis C- Conclusion D- Test
Thursday, September 11, 2014 by Servanshia

Science - Please Check My Answers
Please help me with the following: Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but now I think the answer is B. ...
Thursday, September 11, 2014 by Brady

science
Which of the following is an example of a physical system? hurricanes Volcanoes Glaciers Plant & Animal Communities ***All of the Above*** is it all of the above? Pls help asap!
Thursday, September 11, 2014 by SkatingDJ

Science!
Which of the following is a valid reason why a scientist might reject a scientific theory? A. Some people disagree with it. B. It covers too broad a topic. C. New evidence contradicts it. D. It is too old. Is the answer C?
Thursday, September 11, 2014 by Gwen

Physical science
1. Nicotine,a poisonous compound found in tobacco leaves,is 74% carbon,8,65% hydrogen and 17,35% nitrogen (a)calculate the empirical formula of nicotine (b)what is the molecular formula of nicotine if it has a molar mass of 165 g.mol^-1
Thursday, September 11, 2014 by Please help please

Science
how can you determine that a coin is not pure silver if you know the mass and volume of the coin?
Wednesday, September 10, 2014 by Tyler

Science
If the temperature rose from 25C to 45C how many degree Fahrenheit would that be
Wednesday, September 10, 2014 by Jose

Science
Why sunlight produces more spectral lines than other light sources
Wednesday, September 10, 2014 by Coleson

Science
What information can astronmores gain from spectral lines of light
Wednesday, September 10, 2014 by Coleson

Science
Fluorescent lights must not end up in a landfill. Why must these lights be properly disposed of
Wednesday, September 10, 2014 by Coleson

science
The ------are the things about an object that can be observed,such as it's size,color,shape,or sound.
Wednesday, September 10, 2014 by Amari

science
The measure of how much material makes up an object is the?
Wednesday, September 10, 2014 by Raquel

Science
Which of the following describes a relationship between science and society? (1 point) Scientific discoveries can impact human life; therefore, society must remain scientifically literate. Scientific discoveries rarely impact human life; therefore, it is not necessary for ...
Wednesday, September 10, 2014 by Dfca

biology
jordan is doing a science fair project on the effect of music on the growth of tomatoes. he has two tomato plants, plant A and B, that he grows in a window and gives the same amount of water. plant A is exposed to classical music using headphones attached to the soil. ...
Wednesday, September 10, 2014 by rose fuentes

Physical Science
What is the kinetic energy of a 1850 kg car that is traveling at 58.0 km/h? B. How much work was done to give the car this kinetic energy assuming the car starts from rest? C. How much work must be done to stop the car?
Wednesday, September 10, 2014 by Barbara

Physical science
A silver nitrate solution is added to a solution of potassium chloride.the products formed are silver chloride and potassium nitrate 1.which product is a precipitate 2.write down the reaction in a molecular form.indicate states 3.write down the net ionic equation
Wednesday, September 10, 2014 by Lesedi

Physical science
Give one word or term of the following descriptions 1. A reaction that results in the formation of an insoluble salt 2.the process in which ions whithin an ionic substance are separated 3.the positive ion 4.a proton acceptor
Wednesday, September 10, 2014 by Plz help

science
solved a ball is dropped from the top of a tower 100 meter high. simultaneously another ball is thrown upwards from ground with a speed of 50 m/s . after what time do they cross each other.
Wednesday, September 10, 2014 by pinki

Physical science
Choose the correct answer to the following question 1.The following pairs of ions results in a precipitate being formed... (a)calcium and carbonate (b)sodium and sulphate (c)potassium and iodide (d)sodium and nitrate
Wednesday, September 10, 2014 by Lesedi

Science
A hammer with a 500-g head exerts an average force of 810n on a nail speed as it drives the nail 4 mm into wall. What was the speed of the hammer head when it hit the nail?
Wednesday, September 10, 2014 by Timothy

Critical thinking
Since Jessica’s participation in local politics increased significantly after she joined her school’s political science club, it is clear that her involvement in that club led her to take an interest in politics. The argument above is flawed because
Wednesday, September 10, 2014 by Priscillia

engineering science
An object weighing 60N rest on a slope forming an angle of 17.5 degrees with the horizontal. A force of 44N parallel to the sloping surface just moves the object upwards. Calculate the frictional force.
Wednesday, September 10, 2014 by olivia

science
the string of pendulum is 2.0 m long,the bosy is pulled sideway so that the string becomes horizontal and the bob is released what is the speed with which the bob is released ?what is the speed with which the bob arrives the lowest piont?
Wednesday, September 10, 2014 by zahida

science
A vehicle starts from rest and accelerates with a constant acceleration, covering 200m in 5s. it then continues at a constant velocity for 300m before decelerating with a constant 2m/s^2 deceleration to a stop. what is the maximum speed attained, total time traveled, total ...
Tuesday, September 9, 2014 by annie

Science!
An oven is a technological system. Which of the following describes an input into this system? A. Setting the temperature B. Burning gas releases heat. C. A thermostat monitors the temperature and increases the gas flow when the temperature falls too low. D. A cake is baked Is...
Tuesday, September 9, 2014 by Daisy

science
what is the weight of the ethyl alcohol that exactly fills a 200.00 ml container? The density of ethyl alcohol is 0.789 grams/ml
Tuesday, September 9, 2014 by dylan

Science/Biology
In DNA bases, CG is one pair and AT is another pair because the double ring bonds with the single ring. Why can't Guanine bond with Thymine?
Tuesday, September 9, 2014 by Anonymous

Physical Science
A lamp bulb is rated 100w. Why is a time factor not included in the rating?
Tuesday, September 9, 2014 by Barbara

Science
The active sections that are located along fault lines are called A. stress accumulations. B. recurrence gaps. C. seismic gaps. D. seismic risks.
Tuesday, September 9, 2014 by Morgan

Science
When taking a bath, we use approximately 450 lbs of water. How much heat, measured in British Thermal Units (BTU) is required to heat the water from 60 degrees Fahrenheit to 104 degrees Fahrenheit?
Tuesday, September 9, 2014 by Ken

Science
A classmate states that igneous rock must always become a sedimentary rock next, according to the rock cycle. Explain why this is not correct.
Tuesday, September 9, 2014 by Ally

science
It takes stu, a slimy slug, 20 minutes to travel from his favorite bush to the local trach can (a trip of 30 meters), how far can he travel in 1 hour (60 minutes)?
Monday, September 8, 2014 by Anonymous

Science
Can one organism be a consumer, omnivore, predator and prey? Give an example that completely explains answer.
Monday, September 8, 2014 by Hayden

Science
Does Earth rotate or orbit each day?
Monday, September 8, 2014 by Max

Physicsl Science
A cart on a linear track has a uniform acceleration of 0.172 m/s^2. What is the velocity of the cart 4.00 s after it is released from rest?
Monday, September 8, 2014 by Barbara

Physical Science 8th grade
A balloon filled with air does not rise as a balloon filled with helium. What does this tell you about the density of helium? A. Helium is more dense than air B. Helium is less dense than air C. The two gases have the same density D. When heated, helium becomes more dense
Monday, September 8, 2014 by Brittany

SCIENCE
A flask weights 46.8 g when it is empty and 121.6 g when filled with water. When the same flask is filled with another liquid, the mass is 91.2 g. What is the density of the second liquid?
Monday, September 8, 2014 by LISA

Science!
Which of the following is not a process of a stream load? A. Suspension B. Bed Load C. Materials in solution D. Divide Im thinking D but also C?
Monday, September 8, 2014 by Morgan

science
Three horizontal ropes pull on a large stone stuck in the ground, producing the vector forces and shown in the figure below. Find the magnitude and direction of a fourth force on the stone that will make the vector sum of the four forces zero. The magnitude of vector A is 99.5...
Monday, September 8, 2014 by Anonymous

science
Describe a fourth scenario in which either the Law of Conservation of Matter or the Law of Conservation of Energy could be observed. Using as many sentences as needed, describe how an experiment could be set up to further explore your recorded observation. The goal is to show ...
Monday, September 8, 2014 by LISA

living enviroment
write 8 ways you could apply science safety rules in your kitchen at home.
Monday, September 8, 2014 by tom

science
Two im not sure on, please check? What is the true work of all scientists? Scientists ask testable questions and devise ways to answer those questions through experimentation or observation.*** Scientists research other scientists' discoveries and present their opinions ...
Monday, September 8, 2014 by SkatingDJ

Science
Would the climate/weather count as the physical geography of a region?
Monday, September 8, 2014 by Anonymous

Science
Does more humidity make plants grow faster?
Monday, September 8, 2014 by Anonymous

Science
Why do we say that an explanation in science is tentative?
Sunday, September 7, 2014 by Anonymous

science
What's the difference between hypothesis and a theory?
Sunday, September 7, 2014 by Anonymous

Physical Science
An 84.9 kg man is standing on a frictionless ice surface when he throws a 2.00kg book at 11.1m/s. Do the man move in the same direction as the book or opposite of the book.
Sunday, September 7, 2014 by Barbara

science/math (mean)
Find the mean Sample Value 1- 41.93 2- 12.55 3- 48.07 4- 90.81 5- 18.45 6- 55.81 I came up with 44.60 the online program "said close but check to see if yo made a round error" and at least three decimal places
Sunday, September 7, 2014 by Tom

science
I measure my head fist 28m , 65cm now i'm stuck trying to figure out how to measure my head in mm and km. I need help please.
Sunday, September 7, 2014 by brittney

Science of the Atmosphere
What is the temperature of air, given P= 90 kPA and the pressure is 1.0 kg(m^-3)? Thanks!
Sunday, September 7, 2014 by Rebekah

Physical Science
What volume would 90g occupy?
Sunday, September 7, 2014 by Molly

Physical Science
How many grams would occupy 12cm^3?
Sunday, September 7, 2014 by Molly

science
which of the following best describes a scientific theory?
Sunday, September 7, 2014 by crazy girl

science
a man throws a ball of mass 0.5kg vertically upwards with a velocity of 25 m/s.find:[a}the initial momentum of the ball{b}momentum of the ball at the half way mark of the maximum height {given g=10 m/s square}
Sunday, September 7, 2014 by mansi

science
How far does your automobile travel in meters during your reaction time if you are moving at 55 mi/h (25 m/s)?
Saturday, September 6, 2014 by Nicole

Science
Why are aboriginal clan systems considered human social systems?
Saturday, September 6, 2014 by Veronica

Science of the Atmosphere
What is the temperature of air, given P= 90 kPA and the pressure is 1.0 kg(m^-3)? Thanks!
Saturday, September 6, 2014 by Rebekah

physical science
A simple lever is used to lift a heavy load. When a 60-N force pushes one end of the lever down 1.2 m, the load rises 0.2 m. Show what the weight of the load is 360N.
Saturday, September 6, 2014 by ann

science
What are macro-nutrients?
Saturday, September 6, 2014 by karishma borah

Earth science
Kathleen made the diagram below to show how scientific knowledge changes over time. Which word or phrase best describes what scientists would do at the point indicated by the blank? Original data + new data =blank= modified data. Which would be the answer in the blank to fill ...
Thursday, September 4, 2014 by Stephie

physical science
if an object has a mass of 10 g and a volume of 5 ml what is its density
Thursday, September 4, 2014 by anonymous

science
Need help with a summary of sexual an asexual reproduction
Thursday, September 4, 2014 by olivia

Science
What characteristics are common in main sequence stars
Thursday, September 4, 2014 by Anonymous

Science
In what part of their life cycle are white dwarfs; beginning middle or end or some combination of those stages
Thursday, September 4, 2014 by Anonymous

science
Myoglobin, a protein that stores oxygen, has a mass of 2.98 x 10-14? what?
Thursday, September 4, 2014 by Kathy

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