Science

Recent Questions

math /science
how do I convert 2.56m/s^2 to km/s^2

Science
When an electric current is passed through water during the process of electro says two gases are formed when gases boiling point of negative one hundred and three degrees Celsius and the other has a boiling point of negative two hundred and fifty degrees Celsius as a physical...

Science
If a man travels 2 km towards east and returns back 1 km. What is the displacement?.

Science
 Which of these contains the most tightly packed matter particles? (1 point) A. tea B. carbon dioxide C. a milkshake D. cardboard

Science
If an object is buoyant then it will (1 point) A.float. B.sink. C.attract metal. D.loses it's shape.

science
Suppose that you and a friend decide to use two different methods to make popcorn for a snack. Your friend uses a hot-air popcorn popper. You put a bag of microwave popcorn into a microwave oven. Use what you know—about radiation, conduction, and convection—to explain how ...

science
Suppose that you and a friend decide to use two different methods to make popcorn for a snack. Your friend uses a hot-air popcorn popper. You put a bag of microwave popcorn into a microwave oven. Use what you learned in the lesson—about radiation, conduction, and convection...

Science
You make a terrarium for your school’s science fair by putting some soil into a glass container and adding small plants. You moisten the soil with water and add a slug. You cover the terrarium with clear plastic that has vent holes. Then, you place the terrarium in a sunlit ...

Science Chemical Reactions
1. The current atomic model would be revised if  (1 point) A• better microscopes were being used to study its structure. B• better microscopes are invented in the future. C• new information about an atom’s structure is discovered. C• a new element is discovered in ...

Science
In approximately what year did oil and gas become the dominant fuels for the US? 1880 1910 1940 1970 2000

Science
What causes seasons

Science
What does H2O stand for in science

Science
what is the function of the small intestin?

Science
What happens to air and water during the steps of cloud formation?

Science
The earth is in constant motion. It rotates and revolves. Which of the following is NOT TRUE of the Earth's motion? 2 points A Due to the revolution of the Earth, we experience seasons. B The Earth rotates on its axis once every 24 hours. This causes day and night. C The ...

Science
Hello. I am trying to figure out how to solve polygenic Punnett squares. In order to get extra credit on a test, I have to learn how to use them. I've tried looking at images and tutorials, but I'm still confused.

Science
Name ONE of the air masses that can be found in North America (remember to use both the temperature and humidity descriptors). I searched everywhere, even looked back at my lesson, and I still can't find out, if you can help me or send me a link, I will be very grateful

Science
Three isotopes of hydrogen

Science
Distance 55 m time 10.30 am and distance 255 m time 10.32 am. Find the avg. Speed. Plz advice how total time is being calculated.

Technology
Michaela has been tracking the temperatures of dirt , pond water, and air near her home for a science investigation. She is ready to analyze the data to prepare for her science report. Based on each applications strengths and weaknesses, which one would be the best to choose ...

SCIENCE
A sphere of mass 50g and diameter 20cm is rolling with a speed of 5cm/sec . What will be its its total energy.

....science
1. An example of a geologic event that could be recorded in rocks is ____. (1 point) a civil war the occurrence of sun spots a volcanic eruption a lunar eclipse 2. "The present is the key to the past." This statement rephrases the ____. (1 point) principle of cross-cutting ...

Science
I am doing a project right now and I'm kind of confused. I did an experiment and this is a question asked "Scientists changed the independent variable to learn about the Mpemba Effect. What did you learn from your results? Do you agree that the Mpemba Effect is real?" I did an...

Science
If an organism is heterozygous for a particular trait, the organism. A.has the same allele on both chromosomes in a chromosome pair. B.has different alleles on the chromosomes in a chromosome pair.* C.is missing alleles on the chromosomes in a chromosome pair. D.has extra ...

science
How can we remove temporary as well as permanent hardness of water by permutit process?

science
What is equinox?

Science
1. A body is moving along a circular path of radius R. What will be the distance covered and the displacement of the body after half a revolution? 2. A person starts from his house and travels a circular distance of 15 km around the walled city before returning back. What is (...

Science
What gets wetter and wetter the more it dries?

science
Which option accurately describes scientific theories? (Select all that apply.) are descriptions of phenomena that can be observed to consistently happen over and over again are testable questions that can be investigated through experimentation have withstood the testing of a...

Science Chemistry
How do I make an electron dot diagram for MgO? (

science
1. The key ingredient in chocolate; grinding the beans of the cacao tree produces chocolate liquor, which yields cocoa butter and cocoa powder. 2. The key ingredient in chocolate; grinding the beans of the cacao tree produces chocolate liquid, which yields cocoa butter and ...

science
Examine the situation. Gregor Mendel wondered how traits were inherited, but the technology to study genes was unknown. By crossing pea plants and observing their traits, he concluded that the traits of living organisms are controlled by structures called genes each gene is ...

science
Which option correctly demonstrates scientific thinking in practice? The lava flowing from a volcano is very hot because its temperature has been measured to be over 1,000 ºC. The lava flowing from a volcano must be very hot because it is a liquid. The lava flowing from a ...

science
Define inductive reasoning. answering questions by analyzing specific observations and using them to come to a more general understanding doubting or not accepting conclusions or ideas until they have been adequately tested and verified answering questions based on what can be...

science
Determine the CFU/ml if 1 ml of the 10-5 dilution is plated and 372 colonies are present following incubation. Thank you!

science
Which option correctly defines a scientific theory? an explanation for observable facts that is supported by experimental evidence a scientist’s best guess, or assumption, about the cause of a problem a process of carrying out specific, well controlled tests in order to ...

science
The temperature in the room is rising because the explosion is releasing _____ energy into the air, increasing the speed of the air molecules in the room.

science
For the human body to function correctly, the right amount of sugar must be present in the blood. Several hormones are produced by the body as part of a mechanism to counteract changes in blood sugar so that the amount of sugar remains relatively constant. Which characteristic...

science
What was the big Bang theory? How did scientist learn about it? Why is it so important today?

English
Subject names at school are as follows. math,science, social studies, computer science,etc. ----------------------------------------​----------- Can we use 'information' instead of 'computer science' as a subject name?

Science
#3) A person with trisomy 21 has an extra copy of chromosome 21. What happened during meiosis that caused the person to get three, instead of two, copies of chromosome 21? A) nondisjunction B) genetic recombination C) Binary fission D) Crossing Over I'm thinking that sounds ...

Science
Calculate the POH of a solution when H+ and PH is given

Science
An ideal solution made up of benzene C6H6 and toluene C6H5CH3 has mole fraction of benzene as 0.025,0.5,0.75,1.0 at various concentration. calculate the molar fraction of toluene Calculate the total vapour pressure of the solution at these concentration??

science
find the acceleration due gravity on the surface of Neptune. given that mass of Neptune is 16.7 times that of the earth and the radius of Neptune is 3.89 times that of the earth (Re = 6380 km )

Science
Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 m above earth's surface is it c object's acceleration due to gravity is less on the moon

Science
Acetic acid(CH3O2H) reacts with isopentyl alcohol (C5H12O) to yield isopentyl acetate acetic acid with isopentyl alcohol is 45%,how many grams of isopentyl acetate are formed from 3.5g of accetic acid and 4.75g of isopentyl alcohol? The reaction is ;

Science
A 50.0ml of volume silver nitrate solution contains 0.0285 moles of silver nitrate, what is the molarity of silver nitrate

Science
A simple of oxygen gas at room temperature and 1.03atm occupies a volume of 22dm³. Find the volume of the oxygen gas at STP?

Science, chemistry
Electrophilic substitutions reaction of pyrrole

Science
I am a world of five letter People eats me If u remove my first letter i will be a form of energy If u remove my 2nd i will be needed 4 living If u remove my 3rd letter i will be a preposition If u remove my 4th letter i will be frink 4 u Ans if u r mastermind !

science
A boy moves 100m towards North then 70 my towards East then what is its displacement

English
At the end of "Science and the Sense of Wonder," Asimov notes that everything he has described was discovered after Walt Whitman's time. Imagine that Whitman had known about all those discoveries. Would he have felt differently about astronomy? In a paragraph, respond to that ...

Science
a machine must be driven at 100 r/s from a belt pulley of 600 mm diameter revolving at 72 r/s . the maximum tensile force on the belt must not exceed 3000n .assume that the ratio of the tensile force is 2,5:1. A Diameter of the driven pulley. B the power in kW that can be ...

Science
a machine must be driven at 100 r/s from a belt pulley of 600 mm diameter revolving at 72 r/s . the maximum tensile force on the belt must not exceed 3000n .assume that the ratio of the tensile force is 2,5:1

science
1 which of the following gases was most likely present in earths earliest atmosphere 1.b 2.b 3.a 4.b 5.b 6.true 7.false

Science Help
Place the following words into the illustration below gametes, sporophyte, gametophyte, and zygote. Explain how the terms are related. MY ANSWER 1. sporohyte 2. gametes 3. gametophyte 4. zygote I just need to explain my answer but I do not know how to. Please help me!!!

science
I need help with finding some sources of error! My experiment is that there is one candle lit and five different sizes of beakers being upside down onto the candle (one at a time) and seeing how long it takes for the candle to burn out for each beaker. I already have one but ...

Science
What would you do to measure the volume of a baseball? I've checked my notes and even opened my book! Please help! (I don't think I need a formula yet, I'm not being taught them in Science)

English
We were brought up together; there was not quite a year difference in our ages. I need not say that we were strangers to any species of disunion or dispute. Harmony was the soul of our companionship, and the diversity and contrast that subsisted in our characters drew us ...

Science
How is velocity different from speed?

Science
Which of the following is true about the atom shown? Choose all that apply. its unstable it is stable it belongs to group 10 it belongs to group 18

Science help
1.The current atom model would be revised if a.better microscopes were being used to study* b.better microscopes are invented in the future c.new information about atoms are discovered d.a new element is discovered in the future

Science help
I really need help on the chemical reactions unit test 8b unit 1

Science
I’m really confused on the Lesson 10: Structures and Properties of Matter Unit Test for 6th grade. Can anyone explain it to me?

Science (Last question of these)
Ball A, with a mass of 10kg, is moving to the right at 20 m/s. Ball B is moving to the left at 20 m/s. Upon collision, Ball B comes to a standstill, and Ball A moves to the left at twice its original speed. What is the mass of ball B? How do I do this?

Science
Ball B, with a mass of 30kg, is moving to the left at 10 m/s. With what velocity should Ball A, with a mass of 10kg, move to the right and collide with 2, so that ball A rebounds with a velocity of 30 m/s, and Ball B with velocity of 10 m/s, after the collision? Assume the ...

Science
The earth is in constant motion. It rotates and revolves. Which of the following is NOT TRUE of the Earth's motion? A Due to the revolution of the Earth, we experience seasons. B The Earth rotates on its axis once every 24 hours. This causes day and night. C The rotation of ...

science
Why must not the condensed water drip into the flask?

Science
Ball A, with a mass of 20 kg, is moving to the right at 20 m/s. At what velocity should Ball B, with a mass of 40 kg, move so that they both come to a standstill upon collision? How do I solve this?

history
Which of the following best describes Muslim medicine during the Middle Ages? A. Muslim medicine was based on superstitions rather that science. B. Muslim doctors used the same procedures used by the ancient Greeks. C. It was much more advanced than the medicine practiced by ...

Science
Is the Yacca Mountain facility currently in use? Why or why not?

Science
I don't know anything to put for "Y" for Eukaryote. Help please.

Skills for success science
Plz help due tomorrow would of done it but I had a lot of school work but here the question which of the following factors drives all the weather on Earth, including large-scale storms and local weather systems? Plz help not asking for answers but help plz and thank you

science
how does mass and aceleration affect force???

Science
Choose all of the chemical reactions which correctly show that chemical reactions must obey the Law of Conservation of Matter. a. CH4 + 2O2 → CO2 + H2O b. H2 + O2 → H2O *** c. C6H12O6 + 6O2 → 6CO2 + 6H2O d. 2CO + O2 → 2CO2 *** e. 4P + O2 P4O10

Science
1) What unit is speed measured in? 2) Why is it important to include units when describing motion? I've read this entire lesson. I just can't seem to find these answers.

Science
How do external factors (such as stirring or shaking) determine whether a mixture will become a mechanical mixture or a solution?

Science
Is it possible for a substance (e.g. sugar and water) to be both a mechanical mixture and solution? Why or why not?

ED Tech. Help
Hey I'm having trouble with this Which of the following is a clue that a website is inappropriate? A. It is created by a reputable source such as the National Science Foundation B. It is a gambling site (I picked this) C. It is a social networking site. D. It allows ...

Math
Isaac and Sakura are both doing a science experiment where they are measuring the temperature of a liquid over time. Graphs that represent each of their data are shown below. mc003-1.jpg mc003-2.jpg Which statement is correct? The slope of the graph that represents Isaac’s ...

science plzzz help
From inside to out, describe the components of an atom. What makes one element's atoms differ from another element's atoms?

science
which of the following is an example of recycling a renewable resource? a turning food scraps to compost b washing plastic forks and use them again. need help please only right stuff

Connexus Science
What is the salinity of seawater? 1.5 percent 3.5 percent*** 5.5 percent 10 percent What is the most abundant salt in the sea? calcuim chloride magnesium chloride potassium chloride sodium chloride***

Science
1.) A 2OL Of gas is found to exert 3.5atm at 25°C what would the pressure be if the temperature is changed to 30°C.

Science
If a hawk eats the gopher snake and the gopher snake eats the squirrel and the squirrel eats the pine nuts then the gopher snake is: a.)the producer. b.)the primary consumer. c.)the secondary consumer. d.)the tertiary consumer. e.)the decomposer

Science
Which of the following is true about bacteria? a.)Bacteria are eukaryotic. b.)Each bacteria is an individual organism. c.)They have a nucleus with a nuclear membrane. d.)They do not reproduce without an energy source. e.)They are the newest class of organisms on Earth

Science
Birds called Oxpeckers eat ticks from the Black Rhinoceros.In return, sitting on the Black Rhinoceros protects the Oxpeckers from larger birds.The relationship between the bird and the rhinoceros is an example of: a.) mutualism b.) parasitism c.) commensalism d.) synergism e...

Science
A population of rabbits competes within their population for the same grasses.This is called: a.) interspecific competition b.) intraspecific competition c.) edge effects d.) ecological fitness e.) all out bunny warfare

Science
When affected by Environmental Change an indicator species will: a.) generally show a decline in population. b.) stabilize in population. c.) take over the ecosystem. d.) change its trophic level. e.) post on its Facebook Page.

Science
In order to survive the owls have become more selective and just eat mice at night, whereas the hawks are feeding on ground squirrels in the day.This is an example of: a.) intraspecific competition b.) interspecific competition c.) resource partitioning d.) commensalism e.) ...

Science
Why can't we use static electricity to accomplish certain things, such as activate or charge an electric instrument?

Science
1.Carrying capacity is the maximum number of_________ that an ecosystem can support. A - different species B - Individuals in a population C - habitats D - limiting factors 2. end an island ecosystem, a species of beetle feeds on the leaves of a Shrubbery plant. A species of ...

Science
Because the tilt of Earth's axis always points in the same direction, the seasons in the Northern and Southern Hemispheres are always _______ Options: A : Same B : Opposite C : three months apart. D : six months apart. PLEASE HELP ME ASAP

Science
You will be designing and carrying out your own experiment to investigate the effect different forces have on an object’s motion. The experiment you design should test at least one of the forces that affect motion that you have learned about in this unit. It should be ...

Science
Carrying capacity is the maximum number of_________ that an ecosystem can support. A - different species B - Individuals in a population C - habitats D - limiting factors 2. end an island ecosystem, a species of beetle feeds on the leaves of a Shrubbery plant. A species of ...

Science
Can someone check my answer? ____ is anything that has mass and volume. My answer: matter. Is that correct?

Physical Science
Has anyone done the Physical Science B Virtual Momentum Lab that has day 1 and day 2? I'm really struggling and need someones help thats done it before.

Science plz help
does anyone know the answers for science 7b unit 1 lesson 9 chemical reactions unit test from connexus plzzzz help

Math / geometery
A science museum has a spherical model of the earth with a diameter of 6.5 m. What is the volume of the model to the nearest cubic meter? Show your work.

science
A driver takes off with a speed of 10m/s from a 5m high diing board at 30° above the horizontal how much later doesh she strike the water A rescue plaNe carries a package of emergency supply to be dropped at a point that is very close to a target the plane travels with a ...

  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. Next>>