Science

Recent Questions

Science
2.Which of the following is NOT a model? A. An ant farm B. A bicycle C. An atlas D. A plastic human skeleton

Science
Two cars started off the race with accelerations 3 m/ s² and 8 m/ s². Find the time after which the separation between them is 64 km

Science
Explanation of if the cell undergoes mitosis every 6 hours,how many cells will there be in all after 4 hours

Science-Chemistry
How would I figure out how far the distance in kilometers between the sun and earth be if it takes 8.3 minutes for light to travel?

History
How did humanist philosophy affect people’s perceptions during the Renaissance? people abandoned agricultural in favor of factories and industry to earn a living people began to question government and hereditary rule of monarchs humanist philosophy altered people in the ...

Science
When you measure the boiling point of mercury, you are investigating a ____? 1)chemical change 2)chemical property 3)physical change 4)physical property I think #3. This is a practice but want to make sure. Thanks,

Science
What is Casein Plastic?

Science
Moving from upstream to downstream, channels tend to be _____ confined. a)more b)less c)equally

Science
Check my answers, please. 1. A prion is an infectious, self-reproducing protein structure. (1 point) True X False 2. As one organism eats another, toxins can be spread throughout the food chain. True False X 3. The problem with DDT in the environment is that it decomposes ...

Ela and this is my last question
At the Earth’s Core Edgar Rice Burroughs 1 “Let’s have a look beyond that door, David,” he cried. 2 Together we stepped out to stand in silent contemplation of a landscape at once weird and beautiful. Before us a low and level shore stretched down to a silent sea. As ...

science
Special telescopes, such as the Chandra x-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-rays give off a spectrum of light that tell astronomers what elements make up individual stars. • X-...

Science
A body rises vertically from the earth according to the law s = 64t – 16t2. If it has lost k times its velocity in its 48 ft rise, then k =

science
how to prepare 1L OF 0.5N HCl

Environmental Science
1. A prion is an infectious, self-reproducing protein structure. True X False 2. As one organism eats another, toxins can be spread throughout the food chain. True False x 3. The problem with DDT in the environment is that it decomposes quickly. True False x 4. The Bald Eagle...

science
Special telescopes, such as the Chandra x-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-rays give off a spectrum of light that tell astronomers what elements make up individual stars. • X-...

science
Special telescopes, such as the Chandra x-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-rays give off a spectrum of light that tell astronomers what elements make up individual stars. • X-...

Science
How does that contribute to the continuous and ongoing nature of science? In other words, why is science a never-ending process?

Science
Why do scientific theories change over time?

science
the current atomic model would be revised if 1)better microscopes were being used to study its structure. 2)better microscopes are invented in the future. 3)new information about an atoms structure is discovered.*** 4) a new element is discovered in the future.

Science
A motorcycle and a bus are moving with the same momentum.Which of them have greater kinetic energy ?

Science
Assume that two pigments, red and blue, mix to give the normal purple color of petunia petal. Separate biochemical pathways synthesize the two pigments, as shown in the top two rows of the accompanying diagram. "White" refers to compounds that are not pigments. (Total lack of ...

Science
How the invasive/ keystone species directly effects at least 3 other species within the community. My invasive species: west indian mongoose My keystone species: hummingbird My biome: tropical rainforest

science
Woman weighs= 55 kg cup of coffee = 94 mg of caffeine LDL = 400 mg/ kg Cup of coffee ( 8 oz) How many cups would it take to reach the LDL?

Science
1, How does sea-floor spreading occur? A, New materials are being added to the asthenosphere. B, Earthquakes break apart the ocean floor. C, Sediments accumulate at the area of spreading. D, Molten material beneath Earth's crust rises to the surface. •• 2, Which features ...

Science
Do prokaryotes or eukaryotes have cell Wall?

Science
Look at the border of the Amoeba. What is unique about it? Why do you think it might be important to the cell?

earth science
What are the long-term effects of banning plastic bags, and who is impacted by this issue or problem?

science
Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up individual stars. *** • ...

Science
Calculate the no:of moles of a gas in 44.28L at STP

science
GHOST's are on the earth (yes& no)?

Science
IF 8.5g of KOH powder are placed in 100g of water at room temperature of 20degree Celsius, what is the final temperature of the solution. KOH K+OH H=-57.61 KJ/MOL KOH

science
Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up individual stars. *** • ...

science
Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up individual stars. *** • ...

Science- bio- Please help!!
Pretend you are a medical professional and it your job to make an I.V. solution for a patient that has a total cellular solute count of 1.19%. What would be the perfect I.V. solution to administer to your patient?

Marine Science
Describe the phases of the nitrogen cycle, in the marine environment, starting with the death of a fish. Could someone help me with this? I just need it explained to me, I've watched and read many articles.. but still do not understand very well

Science
Lesson 10:introduction to genetics unit test science 8A unit 2: introduction to genetics Connexus Wht are the awnsers any1:P 👍

Science
1. What is the response of cells in the collecting tubules in the nephrons when antidiuretic hormone AHD is secreted? a. The tubules become impermeable to water b. Serum potassium retention increases c. Large quantities of dilute urine are formed d. Water is reabsorbed from ...

Science
When an electric current passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183 degrees Celsius and the other has a boiling point of -253 degrees Celsius. Has a physical or a chemical change occurred? Explain.

Science
1) What subatomic particles are located in the nucleus and have no effect on the charge of the atom? a) Protons and neutrons b) Electrons c) Neutrons d) Protons 2) The electron can be found in what location of an atom? a) Orbit b) Center c) Attached to protons d) Both the ...

science
need answers for introduction for science unit test

Science
What are the three types of plate boundaries? Can you please not give me the answer, just a website! Thanks!

science
this system gives the body its shape

Science
Rate of change in velocity is known as

science
in the kidney what is the correct sequence of formation of urine involves the following processes? a). glomerular filtration, reabsorption, tubular secretion b). reabsorption. filtration, secretion c). filtration, secretion, reabsorption d). reabsorption, secretion, filtration

Science
Given the parent genotype AaBbCCDDEe, what is the probability of each of these gametes forming? a) ABCDE b) either ABCDE or abCDE Would the answer for a) be 1/8 and for b) be 1/2?

Science Help!
How does sea-floor spreading occur? A)New materials are being added to the asthenosphere B) Earthquakes break apart the ocean floor C)Sediments accumulate at the areas of the spreading D)Molten material beneath Earth's crust rises to the surface

Science
Explain the value or importance of using the International System of Units when describing motion. Provide an example that supports your reasoning.

science
Interpret Data. write the chemical equation for the following reaction: The elements sodium and chlorine combine to yield the compound sodium chloride. need help any help answer or a link idc

Computer Science
You want to buy a new car, and you are thinking about two alternatives, car A and car B. You like both cars, and you are considering keeping whichever one you buy for many years to come. As a result, you want to evaluate the total cost of ownership of both cars over many years...

science
Balance the equations. AI+CuO-->AI2O3=Cu Fe2O3=C-->Fe=CO2 SO2=O2-->So3 i need help please

Computer Science
You want to buy a new car, and you are thinking about two alternatives, car A and car B. You like both cars, and you are considering keeping whichever one you buy for many years to come. As a result, you want to evaluate the total cost of ownership of both cars over many years...

history
What were some differences between the Byzantine and Arab Empires? (Select all that apply.) the byzantine empire forbade trade with Visigoth and Frankish nations, whereas the arab empire encouraged seagoing trade. the byzantine empire had great regard for science and ...

science
A body fired vertically up reaches a maximum heigh H where is kinetic energy 75% of potential energy

Science Portfolio
1st Safety Rule What you should before you start a lab 2nd Safety Rule What you can/should do DURING the Lab 3rd Safety Rule Of what you can/should do After a lab

Science
How did the indicator of barium hydroxide appear in the absence of carbon dioxide by yeast cell

Science help
identify the terms or phrases that are paired together correctly a. deserts and dwarf trees b. temperate and deciduous forest and evergreen trees c. subarctic taiga and moss d. tundra and permafrost (my answer) In which bione would you find the main types of plant life to be ...

Science
Explain why science is a continuous progression of study. No, I'm not trying to plagiarize, I just want an example of what you would write, so I can figure out what I'll write in my own words. I learned that plagiarism has consequences the hard way.

Science
An animal that has body parts arranged around a central point has: A.bilateral symmetry. B.radial symmetry. C.asymmetry. D.a distinct head and tail end.

Science
If don't mind could you check my answers for environmental science 1.The interdisciplinary study of humanity’s relationship with other organisms and the non-living physical environment is termed: a) ecology b) sociology c) political science d) risk analysis e) ...

Science
Using a complete sentence, state what would mostly likely to happen to the production of oxygen by duckweed plants if the intensity and duration of exposure to light were increased

Science
If don't mind could you check my answers for environmental science 1.The interdisciplinary study of humanity’s relationship with other organisms and the non-living physical environment is termed: a) ecology b) sociology c) political science d) risk analysis e) environmental ...

Science
how are carbon atoms incorporated into organic molecules by plants?

Science
Explain what the difference is between a scientific law and a scientific theory. My answer: A scientific theory predicts why something might happen and when more information goes into the theory it can better predict. But a law is something that no matter what will always be ...

Science check my answers please
1. Convert 4.0 kilometers (km) to meters (m). (1 point) 0.04 m 40 m 400 m 4,000 m (my answer) 2. For his science project, Austin wants to determine if the pH of standing rainwater changes over time. He collects a jar of rainwater and places it indoors in a spot that does not ...

science
A bullet m9ving at a speed of 10m/s strikes a wooden plank . The bullet penetrates the plank 2cm deep and remains embedded in it . The acceleration of the bullet is?

Science
Earth's aatmosphere, oceans, and continents began to form during the first several hundred million years of..... A.Precambrian time. B.The Paleozoic era. C.The Mesozoic era. D. The Cenozoic era.

Math,science and technology
I need some help in a weekly reader

Science
Does the MidAtlantic Ridge have gabbro and peridotite rocks?

science
Both a globe and flat world map can model features of Earth. Give an example of when you would use each of these models.

Science
What caused the outer planets to have surfaces of liquids and gases

To Chemistry students
Our primary chemistry tutor has gone on a trip for about a week and a half. In the meantime, you should make good use of the tutorials here: https://www.khanacademy.org/ Once there, you can make an account for yourself if you wish. You don't have to, but you can. This is an ...

science
If a man weighs 194 pounds and is 69 inches tall where is his center of gravity?

phisical science
On a winter day the temperature drops from –15°C to –25°C overnight. If a pan sitting outside contains 0.20 kg of ice, how much heat is removed from the ice for this temperature change?

Science
What is the density of a book whose mass is 1,800 g and whose volume is 300 cm3? *My Answer*You want to identify the numbers first, density = mass ÷ volume. Which would give you, 1800g ÷ 300 cm³ = 6 g/cm³. *Cant Figure Out *What is the mass of a ball whose density is 0.250...

Earth Science
Minerals are classified into groups based on _______. Characteristics?

Science
Why was the tert. Butyl chloride finally washed with water,?

Science
How does a higher heat capacity affect the amount of time it takes for an object’s temperature to change?

Science
Why do scientists use models? a: Scientists use models to learn about things that are too small, too large, or too complex to observe directly. < b:Scientists use models because doing so is always part of the scientific method. c:Scientists use models because they always ...

science
What mass of NaNO3 can be formed by 0.20 grams of NaSO4.3H20?

Science
Definition of Critical Thinking The first reading contained the following definition of critical thinking: According to the article, Critical Thinking as Defined by the National Council for Excellence in Critical Thinking, Critical thinking is the intellectually disciplined ...

Science
Eight Elements of Thought and Reasoning There are eight elements of thought in reasoning. We often use more than one element at the same time. For example, your Point of View includes Assumptions. Therefore, we can assume that these elements are two aspects of the same thing. ...

Science
Fair-Minded Qualities After reading this week’s lectures on the qualities of a Fair-Minded Thinker, select one quality you feel you possess and describe how you embody this quality. Next, select two qualities you feel you need to improve upon. Using the five step decision ...

Science:Earth Science
Explain how energy conservation can help with decreasing air, water and land pollution. This is an essay question. This is my answer. Answer: Energy conservation can help with decreasing air, water, and land pollution because of the different alternatives we have for energy. ...

Science
a biologist diluted a blood sample with distilled water. While observing the sample with a microscope, she noted that the red blood cells had burst. This bursting is most likely the result of which process?

Science
animals with bilateral symmetry

Science
Use your periodic table of elements. Take any element of your choosing (from period 4 or above) and answer the following questions: What is the element's name and symbol? Is it a metal, nonmetal, or metalloid? Which family does it belong to? How many protons, neutrons, and ...

Science
what is Ti(HPO4)2 Titanium Hydrogen Phosphate? Does it occur naturally in soil material? if yes in what state does it occur?

Physical Science
How do you find the mass if they give you the joules and the velocity? Please help me! I'm really confused...

Physical Science
Two objects were lifted by a machine. One object had a mas of 2 kilograms, and was lifted at a speed of 2 m/sec. The other had a mass of 4 kilogram was lifted at a rate of 3 m/sec. ----------------------------------------​--- a) Which object had more kinetic energy being...

Physical Science
The potential energy of an apple is 6.00 joules. The apple is 3.00-meters high. What is the mass of the apple? Please help! I have no idea how to solve this. :(

science
Kelly needs to separate a mixture of sand and sawdust. She tried using tweezers to pick out the pieces of sawdust, but that didn’t work. Her grandfather suggested she use water. How will water help Kelly separate the mixture?

Science
Why must organisms reproduce? A. Organisms must reproduce to maintain genetic similarity in the species. B. Organisms must reproduce to continue to build genetic diversity into the species. C. Organisms must reproduce to continue the species.*** D. Organisms must reproduce to ...

Science
1 the term used to describe how light is reflected from a minerals surface is A.glow. B.streak. C. Density. D.luster.

science
what is the substrate for primase ?

science
do we just breathe with oxygen or oxygen is mix with other gases.

math
Three subjects Geography, Science and English in the library are in the ratio of 5:7:8 which they had increased by 20%,40% and 50%. Find the ratio of increased books # Please guys can you assist me this question#

math
Three subjects Geography, Science and English in the library are in the ratio of 5:7:8 which they had increased by 20%,40% and 50%. Find the ratio of increased books # Please guys can you assist me this question#

Science
When 2-propanol was used as the developing solvent, two substances moved with the solvent front (Rf = 1) during TLC analysis on a silica gel plate. Can you conclude that they are identical? If not, what additional experiment would you perform?

science
what is the substrate for primase ?

English
They watch science programs in their spare time! Instructions: Select the correct answer. My answers are with capital letter 1. Jason wanted to pass on ... A. something who he had been told. B. SOMETHING, WHICH HE HAD BEEN TOLD. C. something that he had been told. D. something...

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