Science

Recent Questions

Science
Which of the following represents a heterogeneous mixture? 1)saltwater 2)air 3)bleach and water 4)chicken noodle soup I think #3 Thank you.

science
Hi! My heartful request to explain thé photosystem and blackmans law of limiting factor in simple and understandable word as possible.

Science
Aggression that develops when the animal is confused about what the owner wants is _______ aggression. A. territorial B. conflict-related C. pain-induced D. fear I am stuck in between A and B please help me

Environmental science
Assume the biomass of the organism at the bottom of the trophic is 5,000 lbs. predict the approximate mass of each of the remaining levels, explain why the mass is changing.

Environmental science
If anyone doesn't mind could they explain the biogeochemical cycle. What are the sinks? How do they work ? How do humans affect them?

Science
Bullet of mass 30g travels at a speed of 1500m/s,calculate its kinetic energy.

science
Goose grass grows tightly around other plants such as hawthorn bushes. suggest two reasons why this method of growth is an advantage for the goose grass.

science question
Calculate the number of mole in 65.5 ug of carbon and 7.9mg of Ca

science
Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth around the Sun - ...

Science
CORRECT THIS ANSWER PLS: Liz is examining a plant cell under a microscope. She sees many small green organelles inside the cell. Her teacher explains that the process of photosynthesis takes place inside these organelles. What type of organelle is Liz looking at? A....

Science
What is the relationship between drainage density and a) Rainfall b) Vegetation c) Soil Erodibility

science
Caculate the mass of photon with wavelength 3.6 A^

science
Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth around the Sun - ...

Science, Maths
A block and tackle of 5 pulleys is used to raise a load of 5o kgf steadily through a height of 20m. The work against friction is 2000J.Calculate the work done by effort, efficiency and mechanical advantage.

Science
A diver curls up when he performs a stunt. Explain. Calculate the angular momentum of a body rotating with 20rpm and M.I 4kg m²

science
Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth around the Sun - ...

science
The main cause of the changing location of the tides on earth is -rotation of the Earth on its' own axis - magnetic forces of the Moon - the revolution of the Moon around the Earth *** -the position of the Sun

BASIC SCIENCE
DRAWING OF A CELL

science
He many isomers can be obtained from C4H10

Science -Physics
The shaker cart,shown in the figure,is the latest extreme sport craze.You stand inside of a small cart attached to a heavy-duty spring,the spring is compressed and released,and you shake back and forth,attempting to maintain your balance. Note that there is also a sandbag in ...

Science-physics
A mass of 0•5 kg is attached to a spring. The mass is then displaced from its equilibrium position by 5cm and released. It's speed as it passes the equilibrium position is 50cm/s. A)calculate the spring constant of the spring. B)calculate the maximum acceleration of the ...

Science
Draw picture graph of the above question?

Science
Suppose three seeds were kept at 30c and sprouted in 6,5 and 4 days. What is the average number of days that these seeds took to sprout?

Science
Is the South American Plate and African Plate convergent continent to continent boundary?

Physical Science
Hello! Thanks for checking my question out! ____ 3. During a phase change, the temperature of a substance (1 point) a) increases. b) decreases. c) does not change. d) increases or decreases. My Answer: C Could someone please check my answer? Thanks! - Da Fash

Physical Science
Hello! Thanks for checking my question out! ____ 5. If the volume of a cylinder is reduced from 8.0 liters to 4.0 liters, the pressure of the gas in the cylinder will change from 70 kilopascals to (1 point) a) 35 kilopascals. b) 105 kilopascals. c) 140 kilopascals. d) 560 ...

Physical Science
Hello! Thanks for checking my question out! ____ 2. Which of the following is NOT a clue that a chemical change has occurred? (1 point) a) change in color b) production of a gas c) formation of a precipitate d) change in shape My Answer: D Could someone please check my answer...

Physical Science
Hello! Thanks for checking my question out! ____ Fill in the Blank 10. The _______________ theory of matter states that all particles of matter are in constant motion. (1 point) My Answer: kinetic Could someone please check my answer? Thanks! - Da Fash

Physical Science
Hello! Thanks for checking my question out! ____ Fill in the Blank 9. Materials can be classified as solids, liquids, or gases based on whether their shapes and _______________ are definite or variable. (1 point) My Answer: volumes Can someone please check my answer? Thanks...

Science
How would you experiment to find out how much this plant type needs for optimal growth? I am not sure how to answer this question.

Science
I need 2 types of systems for an essay questions (not answers please)

Products of science: Technology
Plz help me Products of science: Technology 1. What is the goal of technology? A) to understand the natural world B) to improve how devices operate C) to improve how people live D) to understand how systems operate 2. What is a factor that limits a technological design? A) a ...

science
Which of the following statements the aim of the person who threw darts shown the picture? A The person's aim was both precise and accurate B The person's aim was precise,but it was not accurate. C The person's aim was accurate,but it was not precise. D The person's aim was ...

Science helpppp
1. Students planted three bean seeds. After several days, they observed that the seeds’ roots were growing downward into the soil. Which type of tropism were the roots displaying? (1 point) A) geotropism **** B) thigmotropism C) phototropism D) photoperiodism 2. Which of the...

Science
What original colors are a plant cell????? I looked it up and it said different colors for each part like the cell wall, and the other parts

Physical science
In a recipe for lemonade it gives the ingredients as 1 cup of water,1.5 tablespoons lemon juice, plus sugar and salt.Not taking into account the sugar and salt, what is the concentration of lemon juice in the mixture as a percentage by volume? 16 tablespoons = 1 cup. Please ...

Physical Science
Hello! Thanks for checking my question out! ____ 4. Water is a compound because it (1 point) a) can be broken down into simpler substances. b) always has two hydrogen atoms for each oxygen atom. c) is made of water atoms joined together. d) both the first and second choices ...

Physical Science
Hello! Thanks for checking my question out! ____ 2. Milk is an example of a (1 point) a) solution. b) homogenous mixture. c) colloid. d) compound. My Answer: C Could someone please check if I'm right? Thanks! - Da Fash

computer science
what is the value of the variable? double dNum= 6.23 A. 6 B. 6.0 C. 6.23 D. 0.0 E. error: possible loss of precision

computer science
what is the value of the variable int iNum= 2.02 A. 2 B. 2.0 C. 2.02 D. 0.0 E. error:possble loss of precision please help and explain

science
a framed picture of weight 15N is to be hung on a wall using a price of string . the end of the string are tied to two points ,0.60m apart on the same horizontal level ,on the back of the picture .Find the tension in the string if the string is (a) 1.0 m long (b)0.66m long

Physical Science
Hello! Thanks for checking my question out! ____ 10. How many significant figures should the product 62.25 * 37.4 have? a) 2 b) 3 c) 4 d) 7 My Answer: B Could someone please check my answer? Thanks! - Da Fash

Physical Science
Hello! Thanks for checking my question out! ____ Fill in the Blank 14. In an experiment, if doubling the manipulated variable results in a doubling of the responding variable, the relationship between the variables is a(n) _________________________. (1 point) My Answer: direct...

computer science
what is the value of the variable? double dNum= 6.23 A. 6 B. 6.0 C. 6.23 D. 0.0 E. error: possible loss of precision

Science
I am doing an acrostic on eukaryotic, I can find anything for A and T. Please help me

science
I need an acrostic on the word eukaryotic

computer science
what is the value of the valuable double dNum=5 A. 5 B. 5.0 C. 0 D. 0.0 E. error: possible loss of precision please help and explain

Last science questions I promise please help me
Which of the following organelles coverts light energy into food? lysosome chloroplast*** nucleus ribosome Which of the following shows the correct order of cell organization starting from the least complex Tissue, Organ System, Cell, Organ Organ System, Organ, Tissue, Cell ...

Science really need help
Which of the following distinguishes living things from nonliving things? Living things are made up of cells; nonliving things are not*** Living things are made up atoms; nonliving things are not Living things are made up elements; nonliving things are not Living things are ...

science helpppppp again!!
the cell theory was developed by Robert hooke*** developed before microscopes were invented developed only after electron microscopes became widely used developed by many scientists over the years Most Bacteria are unicellular eukaryotes unicellular prokaryotes**** ...

Science Please helpppp me!!
(1) in order for an organism to develop specialized tissues the organism must be which of the following A) A Plant B) An Animal C) Unicellular D) Multicellular*** (2) Which foods are lipids found in, and what is their function in the body? A) lipids are found in sugars and ...

Marine Science (Check my answers?)
3. What feeding strategy and adaptation would an organism that lived in the abyssopelagic zone most likely use in order to survive, and why? A. Scavenge dead matter on the ocean floor because it is difficult to find prey in the darkness. B. Use bioluminescence to scare away ...

Science
What is the goal of technology to understand the natural world to improve how devices operate to improve how people live THIS ONE to understand how systems operate What is a factor that limits a technological design a prototype a trade-off a constraint THIS ONE a patent After ...

Science
Why the weight of an object varies from planet to planet

physical science
two cars are headed straight for each other, each at a constant speed of 40mph. A. do the two cars have the same speed? b. do the two cars have the same velocity? c. what is the acceleration of each car while moving at a constant speed

science
what is the metric SI unit used for measuring lengths

Science
water is flowing through a horizontal pipe of varying cross section at any two places the diameters of the tube are 4cm and 2cm if the pressure difference between these

Science
A controlled experiment is designed to test a ___.

Science
Say you had a pond that initial had 30 fish. There was 3 fisherman collecting at least 2 fish to feed their family, They fish for 3 seasons ? At the end of the day you would double the fish whatever you had left. $5 a fish What happened to amount of food and money each person ...

science
how can you differentiate a peptide bond and covalent bond and wher will you find the covalent bond ?

Science
What are two examples of a physical system designed by peaple

science
Which one of the following is a chemical change?

Computer science
Create an algorithm and flow chart for adding 37 and 64.

science {chemistry)
30ml of 0.1M of sodium hydroxide is added to 100Ml of 0.1M of acetic acid, then what is the pH of the buffer solution, where (Ka =1.85 ×10*-10 for acetic acid.)

Science
five types of microscopes in order from lowest resolution to highest

Science helppp
Oxygen moving from the bloodstream into a cell down a concentration gradient is a form of A: osmosis B: endocytosis C: Active transport D: passive transport Is the answer D? •

science
How does earth science overlap with life science?

science(chemistry) @
Some of 0.2M of acetic acid are mixed wit 50ml of 0.2 sodium acetate solution, what will be the pH of the mixture?? (Ka=1.85 ×10*-10 for acetic acid).

help with my science test 7th grade connection
True or false Scientific inquiry incorporated many scientific methods.

help with my science test 7th grade connection
Which of the following is an example of a model. A.the solar system B.a globe C.a planet D.a padlock

help with my science test 7th grade connection
11. Several studies link cigarette smoke to health problems have resulted in the banning of smoking in many public places.this is an example of A.ways scientific theories become scientific laws. B.ways a scientists communicate results C.ways science influences society. D.ways ...

mathematics(pure), life science, business,tourism
Hi i need help with career choice. I am currrently Grade 9. I choice the subjects Life Science, Buisness,Tourism and Mathematics(pure) Where can this lead me into? And what College/university can i study at? Please help if any potions available. Thnx

help with my science test 7th grade connection
10. Creating a prototype and troubleshooting are steps in the development of? A.a new scientific theory B.a new experiment C.a new scientific law D.a new technology

help with my science test 7th grade connection
4.How is a scientific theory different from a hypothesis A.A theory is an explanation of a single phenomenon ;a hypothesis is a question that can be tested B.A theory is a well tested explanation ; a hypothesis is a possible answer that needs to be tested C.A theory and a ...

Science
What is the goal of technology A.to understand the natural world B.to improve how devices operate C.to improve how people live D.to understand how systems operate My answer A

Science
What is a factor that limits a technological design? A. a prototype B.a trade-off C.a constraint D.a patent

Science
What is the goal of technology A.to understand the natural world B.to improve how devices operate C.to improve how people live D.to understand how systems operate My answer A

Science
Which of the following is not needed to make a model of the water cycle? A. An energy source B. Water C. A closed container D. A drain D is correct

Science
Should existing structures build from CCA-treated wood be removed? Which argument did you find most convincing?

Science
Which organelle of a prokaryotic cell contain genetic information? a. cell membrane b. ribosomes c. nucleus d. nucleoid I think it is a.

Science
why do living things need food water and the ability to get rid of waste

Check answers
Environmental science Explain why the energy pyramind levels change in size? There is not enough energy to support the organisms that are higher up in the energy pyramid because too much energy gets lost. What is the ultimate source of energy for most food webs ? The sun ...

Environmental science
Why does the energy pyramid levels change in size ? What would happen to a food web if one of the primary consumers was removed from the system ?

Science (Biology)
The disease bullous pemphigoid results in the destruction of proteins within the basement membrane that hold the epidermis and dermis together. How would this likely affect the epidermis?

Biology
Which of the following best describes the relationship between science and society? A. Science influences society but society does not influence science.** B. Society influences science but science does not influence society. C. Science influences society and society ...

science
An empty truck wieght 4000N.its engine can produce a maximum acceleration 1m/s square .if truck is loaded with 2000N,find the maximum acceleration the engine can produce.i want watch video of this question.physic

Science
Which of the following is a pure substance? Choose all that apply. Choose 2. A)Fruit juice? B)nickel? C)saltwater? D)rust? (Fe2O3) I think it is A and C

science
The coefficient of static friction between 3.00 kg crate and the 35.0 incline is 0.300.what minimum force F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline

math/science
1. what type of failure occurs when we cut paper with scissors? 2. what type of failure occurs when you spread butter on toast? strength, stiffness, or stability

Science
How does salmon increase the chances of the survival of it species? a.lays a thousand eggs b.splits into two c.nurtures it young d.lays one egg I think it is a.

Science
In order to reproduce, flowering plants must do what? A. split into two cells B. release seeds C. regenerate D. mate I think the answer is b.

Science
How can the body of an animal stay healthy? a.fighting disease b.making food c.getting enough sunlight d. reproducing I think it is c.

Science
2. what is a factor that limits a technological design?

Science/Math
7. A student measures the mass of a paper clip. The student’s data table is shown below. The accepted value for the paper clip’s mass is 1.14 g. Trial # Mass 1 2.45 g 2 2.40 g 3 2.42 g Which of the following best describes the student’s measurements? (1 point) • The ...

Science
1. Which statement best describes the relationship between science and technology? >>A. The goal of science is to gain an understanding of the natural world, while the goal of technology is to use that understanding to improve people's lives.<< B. The goal of ...

Science/Math
6. A student measures a rectangular room to be 20.0 m × 17.16 m. Which of the numbers below represents the room’s area with the correct number of significant figures? (1 point) • 340 m2 • 343 m2 • 343.2 m2*** • 343.20 m2 Am I Correct?

Science, Example PLZ?
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life. Have Any Example? I Sure Dont Have Any... Can You Give Me An Example Or Two Since Im TOTALLY CLUELESS ...

science
c6h12o6(aq)+6o2(g)->6co2(g)+6h2o(l) ∆h=-2820kj c2h5oh(aq)+3o2(g)->2co2(g)+3h2o(l) ∆h=-1380kj hitunglah reaksi c6h12o6(aq)->2c2h5oh(aq)+2co2(g)

Science
Alice and Marge are studying the properties of matter. The girls cut some silver-colored magnesium sheets into 3-inch long strips and then put one strip each into test tubes: one containing water and one containing acid. Nothing happened when they added the magnesium to the ...

science
connexus academy make a project about Mitosis and Meiosis

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