Science

Recent Questions

BMB/Science
How would you know if free fatty acids neutralized all the NaOH in creating soap?

Science
A soccer star is travelling with a car of a mass of 880kg on a horizontal road at a velocity of 30m/s. He immediately applies the brakes so as to stop 50m away. The resistance to motion on the horizontal road is 295N. Calculate the deceleration of the car and the braking force

Science
which of the following summarizes the function of the respiratory system? 1) transport oxygen to cells and wastes away from ells. 2)to protect the organs in the chest cavity. 3)to move oxygen from the air into the body and carbon dioxide from the body into the air 4) to ...

Science
Both fossil fuels and rocks are natural resources.How do these resources differ in how they are used by people

Science
Which of the following describes the path of blood between the heart and the lungs? 1)heart-capillaries-veins-arteries-heart​ 2)heart-arteries-veins-capillaries-heart​ 3)heart-arteries-capillaries-veins-heart​ 4)heart-veins-capillaries-arteries-heart​ I...

Science
1. One of the ways humans can preserve biodiversity is (blank). A. habitat destruction B. habitat preservation C. habitat fragmentation D. poaching There are other questions (19 others) but I cant type the rest at the moment.

science
Name the parts of the flower

science
Name all type of machine

science
Which of the following shows complex machine. A.truck,sewing machine B.broom, screw C.wheel barrow ,broom D.shovel, broom

science
A body was moving with a velocity 60km/hour. It is brought to rest by applying a force of 200newton.Find the mass of body in5sec

Science Help
Can someone give a short summary of the difference between Mitosis and meiosis? I can't tell the difference.

science
The ionization energies for the removal of the first electrons in Silicon 780,Phosphorous 1060,Sulphur 1005,Chlorine 1225.

Science
Why are molecular models important in the understanding of molecules? (Select all that apply.) A. They can offer a perfect visual image of the compound. B. They provide a visual of arrangement of atoms, bonds, and valence electrons in the compound. C. They can identify the ...

Science
Review the information. In Compound A, Element W has an electronegativity of 2.8, and Element X has an electronegativity of 2.5. In Compound B, Element Y has an electronegativity of 2.0, and Element Z has an electronegativity of 3.8. Which statement correctly identifies the ...

science
I need a reason the land forms canyons and volcanoes are similar thank you

Science
A pelican flying drops a fish from a height of 10.1m. The fish travels 8.5m horizontally before hitting the ground. What was the pelican's speed?

pol science
True or False: "Framing" an issue (by the news media, for example) means giving the issue a particular slant.

Science Help
I am very confused on what I am supposed to do. I have to make a powerpoint about all the steps of mitosis and meiosis in order and explain how they replace old or broken cells. I don't know the steps or if there are four steps or five. Please help!

Science
Which of the following body systems does the immune system rely on to provide the first line of defense against pathogens. A. Integumentary system B. Nervous system C. circulatory system D. endocrine system I think it is C

Science
silicon sodium krypton potassium which element has the LEAST metallic character. A) silicon B) sodium C) krypton D) potassium

Science
Does anyone know the answer to the science quiz Energy Unit Test for lesson 12 unit 3? please help...

Computer Architecture
home / study / engineering / computer science / computer science questions and answers / 4.7 problems in this exercise assume that the logic blocks used to implement a processor’s ... Question: 4.7 Problems in this exercise assume that the logic blocks used to implement a ...

science
which of the following describe radio waves. Along wavelength with high frequency, b long wave length with short frequencies or low wave length with low frequencies

Science
Which of the following best describes the particles in potato chips and lemonade? The particles are able to flow in both. The particles are locked in position in both. The particles are locked in position in lemonade and able to flow in potato chips. The particles are locked ...

Science
Three people hiked to the top of the hill represented by the following topographic map. Each hiker started at the same elevation but at different locations around the hill. Use this map for questions 4 - 6. (All of them are at a elevation of 180 meters and the top is 264 ...

Science
How does dilution of a substance effects the endpoint of tritation? Like if you dilute a 50 mL of .5 M acid to a 100 mL concentrated .5 M acid, what would be the endpoint? Would it be twice the ending since you need more moles or the same, since you are only adding nonreactive...

science
A powerpoint about four landforms

Science
1. what is a single replacement reaction A. A reaction in which two or more substances react to form a single substance*** B. A reaction in which one element takes place the place of another element in a compound. C. A reaction in which a compound breaks down into two or more ...

Physical Science
Hi! Thanks for checking my question out! ____ 1. Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction? (1 point) a) CH4 + O --> H2O + CO2 b) CH4 + 4O --> 2H2O + CO2 c) CH4 + O2 --> H2O + ...

science
At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids? aThe particles in the liquid have greater kinetic energy than the particles in the gas. bThe particles in ...

science
When 9.6 grams of NaBr are dissolved in enough water to create a 165-gram solution, what is the solution's concentration, expressed as a percent by mass? 4.8% NaBr 5.5% NaBr 5.8% NaBr 6.2% NaBr

science
1. The breaking down or disintegration of substances such as rocks and minerals by physical, chemical, or biological processes is called- A Erosion B Weathering*** C Climate D Deposition 2. When particles carried by water, ice, or wind are dropped in another location it is ...

SCIENCE
When 9.6 grams of NaBr are dissolved in enough water to create a 165-gram solution, what is the solution's concentration, expressed as a percent by mass? 4.8% NaBr 5.5% NaBr 5.8% NaBr 6.2% NaBr

science
When 9.6 grams of NaBr are dissolved in enough water to create a 165-gram solution, what is the solution's concentration, expressed as a percent by mass? 4.8% NaBr 5.5% NaBr 5.8% NaBr 6.2% NaBr

Science
If a substance is a mineral, how could you identify what type of mineral it is? help me!!

Science
Which of the following functions like a fulcrum in a lever? A:tendons connecting a muscle to a bone at a joint. B:ligaments connecting bones at a joint. C:two muscles working as a pair to move a joint. D: two bones meeting at a joint. I think the answer is B. Thank you.

science
as magma cool,it forms ? rock by the process of ?.

Science
Which of the following statements describes the conservation of a natural resource? A. A timber company only cuts some trees down and replaces them with new trees. B. A solar energy company harvests energy from sunlight. C. A timber company cuts down all of the trees on a ...

English
What does "interactive effect" mean (in science)? I am a bit confused with this phrase, but how I interpreted it is that it involves examining the effects of two independent variables on a dependent variable. For instance, examining the effect of different percent strengths of...

Science
Which statements show how a chemical bond is formed? (Select all that apply.) a. The valance electrons of an atom are emitted from an atom’s orbital. b. The valence electrons of a metal transfer to the valence shell of a nonmetal to stabilize both atoms. c. The valence ...

Environmental Science
Need a tutor that can help me with an online assignment

Science
Kawaii~chan needs help with Science can someone help kawaii~chan 2 Witch term refers to the diffusion of the water through a membrane A Osmosis B Engulifing C active transport D Facilitated

Science
Kawaii~chan needs help with Science can someone help kawaii~chan 1 What happens in the phloem A Water moves up from roots B Food moves down from leaves C Food moves up from roots D Water moves down to roots

Science
a. Draw the structural formula for a hydrogen molecule (H2) and an oxygen molecule (O2). Remember that each line represents an electron pair being shared.

science
the seperation between hydrogen and chlorine atoms in the hydrogen chloride molecule is about 0.13 mm. the distance of center of mass of HCL molecule from hydrogen is

Science
i need a bit of help finding out how to do this problem. just tell me how and ill take it from there. Q.A compound containing carbon, hydrogen, and Oxygen is found to be 40% carbon and 6.7% hydrogen by mass. the molar mass of this compound is between 115 g / mol. determine the...

Discrete Mathematics
Students at Apollo Elementary School receive ribbons at the end of each year at a school-wide awards ceremony. This year 120 students receive gold stars for perfect attendance, 180 receive certificates for participating in the science fair, and 80 students receive blue ribbons...

Science 9
The energy each organism obtains from another organism? Food or is it chemical energy

science
A uniform force of 30N acts on a mass 2.5kg initially at rest for 5seconds then it withdrawn and a retarding force F now acted on the mass in the direction of the motion to reduce its velocity to 12 m/s.( calculate the momentum of mass before the retarding force starts to cut ...

Math
To help raise funding for attending a science competition out of town, John and his three friends sell candies in their neighborhood. The average of each person’s sale is $200. John’s sale is 1/3 of Steve’s sale, Steve’s sale is 1/4 of Paul’s sale, and Charlie's’ ...

Science. Might Be eays for you, i dont know
What is gravity? How does gravity effect weight? How do people take advantage of gravity?

Science
Which type of radiation emits particles of helium nuclei? alpha radiation beta radiation induced radiation gamma radiation I think a or d

Science
What is the raw materials of metamorphic rocks?

science
which of the following children's playground equipment can be used to model and explain the movement of matter in the biosphere? (1 point) Slide Merry Go Round Swing Seesaw

Science
How much sugar can be dissolved in 250g of water is heated to 80°c?

Physical Science
Describe/draw the process and steps of an electron emitting light.

Writing
write an annotated bibliography on Franco, L. M., Bennett, S., & Kanfer, R. (2002). Health sector reform and public sector health worker motivation: a conceptual framework. Social Science & Medicine,54(8), 1255-1266

Science HELP
Although the Amazon Basin receives more than 80 inches of rain per year, South America also has the driest place on Earth, known as A. Death Valley. B. Gobi Desert. C. Atacama Desert. D. the Caribbean.

science
If ozone mixing ratios are 0.24 ppmv and ROG mixing ratios are 1.7 ppmC, what is the best an most effective regulatory method of reducing ozone if only the effects of NOx(g)and ROGs on ozone are considered?

science
Why are the coldest temperatures at the 50 km height from the surface of the Earth, occur generally at tropical tropopause?

Science // Help
How did planetsmals form planets? They broke apart into smaller chunks. They collided and stuck together They cooled and pulled ice together They began to rotate If anyone took the assessment please help x

Science
Rates of soil erosion are ________ than they were before humans appeared? A.) about the same B.) faster * C.) slower

Science
A good business letter should A)Be printed and mailed B)Be professional and polite C)Demand actions from people in power D)Never be sent to people who are not interested in the topic. My answer B

Science Please Help
What are the similarities of the formation, appearance, and location of valleys, canyons, plains, and volcanoes?

Science
To create less waste in the first place is to a. reduce (?) b. reuse (?) c. recycle d. incinerate Hi. So, for this question, i completely understand what it's asking but i can't figure out which one it would be. Incinerate means to burn waste, but that wouldn't mean less waste...

science
how does a grassland follow conservation of mass

Science
Explain how osmosis across the membrane affects the size of the egg.

Physical Science ?
1. Cooking requires continuous addition of energy to the chemical reactions that are taking place. The chemical reactions involved in cooking can be described as _____. 2. Measuring how quickly a reactant disappears is one way to measure the _____ of the reaction. 3. A chunk ...

Science
I need an acrostic poem for the word waves.

Science
What kind of substance does the following, reflects light, warms up in my hand, flattens out if hit with a hammer, conducts electricity? 1)nonmetal 2)metal 3)metalloid I think #3

Science Please Help
What are the similarities and differences of valleys, canyons, plains, and volcanoes?

science
enzymes are important because they A contain water B speeds up chemical reactions C contain genetic material D helps the cell maintain its shape

Science
4: Which of the following is true of an object in a circular motion at a constant speed? A: The net force on the object is zero B: The object is not accelerating as the speed of the object remains the same C:the object is accelerating as the direction of the object is changing...

Science
Which of the following statements best describes the characteristics of a hypothesis,one of the steps of the scientific method? I think it is a scientific inquiry that cannot be tested.

home science-garment construction
describe how to attach a lace on the lower edge of a skirt using an overlaid seam

Science
A metal from group 1 and a nonmemtal from group 17 are A.not likely to bond B. Likely to form a covalent bond C. Likely to form a ionic bond** D. Likely to form a metalloid I think it's c am I right?

science
Which of these is an example of a chemical reaction that occurs at a very fast rate? A: Rotting wood. B: An explosion. C: Photosynthesis. D: Iron rusting. I personally think it's A, but I'm not completely sure of my answer, which is why I referred to posting this question.

Science
Give one example of a question that science would not be able to test. Then, explain how it could be changed into a testable question.

science
What caues acid rain

History
Which accurately describe ideological differences between Catholicism and humanism during the Renaissance? (Select all that apply.) a. Catholicism promoted the individual as the center of existence, whereas humanism promoted God as the center of existence. b. Catholicism ...

History
How did humanist philosophy affect people’s perceptions during the Renaissance? a. People began to question government and the hereditary rule of monarchs. b. Humanist philosophy caused people to favor superstition over science and reason. c. Humanist philosophy altered ...

science
enzymes are important because they _____

Science
A_______________ is a group of similar cells that perform a specific function in and organism ___________ are nerves cells that carry response information to muscles and organs Carbon dioxide and_________ are outputs of cellular respiration ________________Is essential to ...

Science, Please help, due very soon!!!
Describe how you would prepare the following two solutions. Be sure to include the type of glassware which you would use and as much detail as necessary for someone to actually prepare the solution using good laboratory technique. • 250 mLs of a 5% NaCl (w/v) from solid NaCl...

Science
Contrast mitochondria and chloroplasts. Please. Thanks.

Science
PLEASE HELP ITS URGENT contact lenses improve your lives. contact lenses are example of an______? A.skeptical B.experiment C.invention D.evidence E.inference F.prototype G.biased H.technology I.hypothesis

Environmental Science
1. Decibel is a measurement of the amount of pollution (True or False) 2. Non-Point-Source pollution can be traced to one specific source (True or False) 3. Point-Source pollution is pollution that comes from identifiable locations. (True or False) 4. Burning fossil fuels ...

science
Which molecule, or process, should be targeted by the new anti-cancer drugs under development to treat this type of leukemia? Type is T-Cell-Prolymphocytic-Leukema (T-PLL) Please help. Thank you

Science
How long will it take a shell fired from a cliff at an initial velocity of 800m/s at an angle 30 degrees below the horizontal to reach the ground 150m below?

Science
Which of following is not an igneous rock. Pumice Obsidion Or limestone

SCIENCE-PHYSICS
PLS CAN SOMEONE EXPLAIN "VECTOR"

science
tissuis are grouped together to form which type of structure?

science
what do you call a group of organs working together to perform a specific function?

Sensory Science
What are the pros and cons to using a sensory panel over an analytical measurement to evaluate the texture of a product?

Science
Which of the following explains why water is limited resource 1:water is present on earth in a fixed amount that does not change 2:water is degrading slowly with time 3:only water not present in oceans is available for living things to use 4:once it ends up as groundwater ...

Science I need a teacher's help
Why are capillaries and not arteries or veins found in the alveoli, nephrons, and villi. A. vessels must be small so that very little blood enters these tissues B. vessels must be narrow so that only very small molecules can reach these tissues C. vessel walls must be thin to ...

Science
Milk of magnesia has the chemical formula Mg(OH)2. what is the mass of 3.2 moles of milk of magnesia? The molar mass of magnesium is 24.3 grams per mole. The molar mass of hydrogen is 1.0 grams per mole. The molar mass of oxygen is 16.0 grams per mole. A. 132.2 g B. 135.4 g C...

Science
Two people are pushing a couch from opposite sides. One person is pushing to the right with a force of 3 N. The other person is pushing to left with a force of 4 N. Which of the following best describes the movement of the couch? A) The couch will move to the left with a force...

Science
A negatively charged metal ball of negligible mass is separated from a negatively charged rectangular block (assume the charge cannot escape) by an initial linear distance ‘d’. On the other side, the metal ball sits at the start of a semicircular loop of radius’R’, ...

Science
1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and is red. B Barnard’s...

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