Science

Recent Questions

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 is ...

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.

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?

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 ...

Science
what is spectral broadening

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 ...

science
Is it possible that free Internet content might one day replace textbooks?

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 ...

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

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?

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 of the  A. veterinary ...

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.

science
if the paramecium overheats, what could happen to the metabolism

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

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 average ...

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.

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 totaled 19 ...

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 ...

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 ...

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 ...

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: ...

physical science
what causes friction?

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

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 ...

Science
What is spectral broadening, Quasars, and the Expansion theory

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 ...

Science
So what would you find something in the house? Product Symbols Precaution One example would be appreciated

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?

Science
What is red shifting and blue shifting

Science
What is a protostar

Science
What is apparent brightness and absolute brightness in Science

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 ...

science
Which of the following is a good study habbit.

Science
What is the first step in the scientific method? (I WAS ABSENT DURING LESSON) A- Observation B- Hypothesis C- Conclusion D- Test

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. Is ...

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!

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?

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

Science
how can you determine that a coin is not pure silver if you know the mass and volume of the coin?

Science
If the temperature rose from 25C to 45C how many degree Fahrenheit would that be

Science
Why sunlight produces more spectral lines than other light sources

Science
What information can astronmores gain from spectral lines of light

Science
Fluorescent lights must not end up in a landfill. Why must these lights be properly disposed of

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

science
The measure of how much material makes up an object is the?

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 ...

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. ...

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?

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

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

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.

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

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?

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

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.

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?

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 ...

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...

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

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?

Physical Science
A lamp bulb is rated 100w. Why is a time factor not included in the rating?

Science
The active sections that are located along fault lines are called A. stress accumulations. B. recurrence gaps. C. seismic gaps. D. seismic risks.

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?

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.

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)?

Science
Can one organism be a consumer, omnivore, predator and prey? Give an example that completely explains answer.

Science
Does Earth rotate or orbit each day?

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?

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

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?

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?

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...

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 ...

living enviroment
write 8 ways you could apply science safety rules in your kitchen at home.

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 for ...

Science
Would the climate/weather count as the physical geography of a region?

Science
Does more humidity make plants grow faster?

Science
Why do we say that an explanation in science is tentative?

science
What's the difference between hypothesis and a theory?

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.

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

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.

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

Physical Science
What volume would 90g occupy?

Physical Science
How many grams would occupy 12cm^3?

science
which of the following best describes a scientific theory?

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}

science
How far does your automobile travel in meters during your reaction time if you are moving at 55 mi/h (25 m/s)?

Science
Why are aboriginal clan systems considered human social systems?

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

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.

science
What are macro-nutrients?

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 ...

physical science
if an object has a mass of 10 g and a volume of 5 ml what is its density

science
Need help with a summary of sexual an asexual reproduction

Science
What characteristics are common in main sequence stars

Science
In what part of their life cycle are white dwarfs; beginning middle or end or some combination of those stages

science
Myoglobin, a protein that stores oxygen, has a mass of 2.98 x 10-14? what?

Computer Science
Define an unambiguous context free grammar that generates the language of strings containing a series of a's followed by a series of b's followed by a series of c's concluding with a series of d's. The number of a's must be exactly the sames as the number of d's and the number...

Computer Science
Write a regular expression defining strings that begin with an a and end with a b and can contain any number (including zero) of c's or d's in the middle. Every c that is in the string must be followed by at least one d. Construct a deterministic finite state automaton with no...

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