Science

Recent Questions

Life science,maths lit, history,geography
Can i become a nurse if i study those subjects?

science
A student adds 3 spoons of salt to 100 ml of water. The solution is clear with nothing on the bottom of the cup. One spoon of the salt has a mass of 5g. What is the mass of the solution? After the water evaporates what is the mass of the solid remaining in the cup?

science
a student adds 3 spoons of salt to 100 ml of water. the solution is clear, with nothing on the bottom of the cup. one spoon of the slat ha a mass of 5g. what is the mass of the solution? after the water evaporates, what is the mass of the solid remaining in the cup?

Science
A skier squats low and races down a 13 ◦ ski slope. During a 7 s interval, the skier accelerates at 4.2 m/s 2 .What is the vertical component of the skier’s acceleration? Answer in units of m/s 2

science
I want to do my msc project in clown fish. But i did not select an exact topic. Can you help me to select the topic?

science
Which physical properties are characteristics of metals? Choose all that apply. -brittle -high luster -malleable -ductile -not very reactive 1, 2, and 5?

Science
Can you Describe what happens when a roller coaster rolls downhill in terms of velocity and acceleration. Is the roller coaster increasing in velocity? Is the roller coaster accelerating?

Science
Footprints and trails are examples of trace fossils. True*** False

Math
Salon an was told the written paper on his science experiment should express measurements in liters. Which shows how to calculate the number of liters he used if he used 5 cups of water

Science
I need help understanding this. I keep re-reading and I'm still confused. Can you help me by re writing it in a way that I can understand? The pressure law states that for a constant volume of gas in a sealed container the temperature of the gas is directly proportional to its...

science
does the liver have exocrine and endocrine functions? if so, what the functions? I don't think the liver has both exocrine and endocrine functions. I could be wrong. Someone kindly explain?

science
In photosynthesis is carbon dioxide reduced to glucose while water is oxidized to oxygen? am I correct? If not, can someone explain what's reduced into what and what's oxidized into what? thanx =]

science
The bonds that holds atoms together in a molecule are a form of a. potential energy b. ionization energy c. kinetic energy d. thermal energy A?

science
True or False Mutation of germ cells can be inherited. True?

science
concentration of PbI ions in SLN saturated with PbI solid containing dissolved I- with a concentration of 0.085M

science
The modern atomic model includes electrons orbiting the nucleus. Which of the following parts of Dalton's atomic model was disproved by the discovery of the electron? - Atoms are tiny particles. - Atoms cannot be divided into smaller parts . - Atoms have specific mass and size...

Physical Science
how much energy must be removed from 1 L of water at 25 C and turn it to ice at -10 C?

math,science,algebra,geography
does any1 know a website that I can find answers to every subject asap?

Science
A 100kg block rests on a table. The area of contact between the block and the table is 4m2. Calculate the pressure.

Science
What is/are the main factor(s) that determine(s) that your plants will grow into bean plants (or other fast-growing plants that you used for your experiment) and not some other type of plant (genetics, environment, or both)? Explain your answer

science
A body is projected vertically upwards from the ground such that its speed at half the maximum height is 20m/s. Find the maximum height attained by it.

Science
What is/are the main factor(s) that determine(s) that your plants will grow into bean plants (or other fast-growing plants that you used for your experiment) and not some other type of plant (genetics, environment, or both)? Explain your answer

Science
Plants continue to grow throughout their lives by producing new plant material. Photosynthesis is required for this process to occur. True or false? And explain why.

science
What is the volume of a cardboard box that is 11 inches long, 3 inches wide, and 7 inches high.

science
Describe how you would find the mass of 250mL of water

science
Help me please looked everywhere T- the skeletal system consists of 206 bones H- helps protects the body E- S-support K- E- L-ligaments E- T-tendons A- L- S-skeleton Y- S-shape and structure T- E-exercise M-

Science
A scientist was studying the effects of oil contamination on ocean seaweed. He thought that oil runoff from storm drains would keep seaweed from growing normally so he decided to do an experiment. He filled two tanks of equal size with water and monitored the dissolved oxygen ...

Science
In the space below, write a paragraph describing the work of a chemical engineer. Include a description of the different industries that they work in and the skills they need to be successful Need Help!!!!

Science
A scientist was studying the effects of oil contamination on ocean seaweed. He thought that oil runoff from storm drains would keep seaweed from growing normally so he decided to do an experiment. He filled two tanks of equal size with water and monitored the dissolved oxygen ...

AP Environmental Science
Why is it necessary to eliminate absolutely all invasive fire ant colonies to eradicate the invasive population? A)Every colony has a major impact on native flora and fauna. B)Because the last colony found is the one housing the invasion’s queen. C)Even a single remaining ...

Science Can You Please Check
1. DNA is found in ____ cells. sex sperm all* no 2. A ____ is part of the DNA code on a chromosome. gene* genotype phenotype gender 3. ____ is defined as either male or female except for rare species that have the ability to change sex. Competition Phenotype Genotype Gender*

science
preparation of 600ppm sodium ions from sodium carbonate

Science Project suggestions??
I cannot think of an original science project idea. I would really like an original one instead of the online ones which have already have their own procedures and stuff. I would like to do a science project that is has to do with chemistry or computer science. Please help!

Physical Science
Why do molecules in a cup of water move at a variety of speeds?

Political Science
Can states choose to ignore federal speed limit and other safety requirements if they are willing to forego federal funding for highways and roads?

science
Many chemical salts come as hydrated crystals. That is, there is a specific ratio of water molecules associated with the salt crystals e.g. MgSO4.7H2O (called Magnesium sulphate heptahydrate FW = 246.5) has 7 water molecules to every Mg2+ and SO42- ion pair. But it is also ...

, science,
GOT STUCK PLEASE HELP LOOKED AT EVERY WEBSITE T- the skeletal system consists of 206 bones H- helps protects the body E- S-support K- E- L-ligaments E- T-tendons A- L- S-skeleton Y- S-shape and structure T- E-exercise M-

, science,
HELP ME FISNSH MY POEM PLEASE T- H- E- S-support K- E-energy support L-ligaments E- T-tendons A- L- S-skeleton Y- S-shape and structure T- E-exercise M-

science
acrostic poem for "THE NERVOUS SYSTEM" please help been trying all day can get it

science
I need help on a acrostic poem for nervous system. Anyone please do tomorrow

Science
The solubility of a compound in water is 6.8g/100ml at 25°C.. Calculate the amount of water required to crystallize 10g of the compound. If the pure compound is collected at 25°C what is the maximum possible yield percent.

science
Show that 9300 cal is required to change 15g of 20C water to 100C steam

science
chemistry Science.what can be deduced from the temperature change during the different reaction?

sofunda
science chemistry..investigate the reaction of a number of elements and compound with water and classify the reaction as exothermic or endothermic.

Science
A vitamin C tablet was dissolved in 50.0 mL of water. The resulting solution was titrated to the equivalence point with 28.5 mL of 0.100 M I3− solution. What is the starting mass of the tablet assuming the tablet is 100% vitamin C? I found the moles in I3- to be .00285. ...

integrated science
with all other factors equal, if you double the balanced force on an abject of a given mass the acceleration will be?

Science
In the following total ionic equation which ions are spectator ions? 2 Na+ (aq) + 2 Cl−(aq) + Pb2+(aq) + 2 NO3−(aq) ¨ PbCl2 (s) + 2 Na+ (aq) + 2NO3− (aq) I think the answer is all of them because I DO NOT see any that cancel from one side to the other?

Science
Suppose that a sample of gas occupies 119 mL of volume at 25◦C and a pressure of 221 torr. What would be the volume if the pressure were changed to 647 torr at 25◦C? This is boyle's law right? p1v1 = p2v2 Since I'm looking for v2 I rearranged it to be v2 = p1v1 / ...

Science
Please help!!! You mix 100 millimeters of 10 degrees Celsius water and 100 millimeters of 90 degrees Celsius water. What is the final temperature?

science
Consider the diprotic acid H2A with K1 =1.00 X 10-4 and K2 = 1.00 X 10-8 . Find the pH and concentrations of H2A, HA- , and A2- in: (a) 0.100 M H2A; (b) 0.100 M NaHA; (c) 0.100 M Na2A.

science
How is ethyl alcohol convert into chloroform?

science
How is 2-iodopropane convert into 2,3-dimethyl?

Science
The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of runway required for the plane to take off if there is a 13 knots head wind? The runway at the Tallahassee Regional Airport has a length of 8000 ft. ...

Science
How long does a mHz take to travel?

science
How fast does a kHz travel per second?

jules
Science

Science
If the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky, to be in August? A. 66F B. 83F** C. 103F D. 125F I don't know how to give you think link. Any ideas?

science
You have a different rock with a volume of 30m3 and a mass of 60 g

Science- Physics
Two plane mirrors, A and B, are separated by 30.0 cm facing each other. An object is placed 20 cm from mirror A. Locate the first two nearest image formed by each mirror.

Science- Physics
A plane mirror is mounted at the back of the truck that is moving at 25 km/h. How fast does the image of a man standing on the road seem to be moving away from him?

Science
How can you evaluate scientific claims? NEED HELP!

earth science
Stellar evolution is the life cycle of a star. A cycle suggests that upon death of a star, another star is born. How is this possible? Stars never really die. The death is a black dwarf star. This type of death triggers the birth of a new star. The death is a red giant. This ...

science
need to about cells HEL:P

Science
how can models help in science, why they are important, what and some examples of models.

7th Grade Science Help Please
For his science project, Austin wants to determine if the pH of standing rainwater and places it indoors in a spot that does not receive a lot of sunlight to limit evaporation. Using a pH testing kit, he measures the pH of the water once a day for 20 days. What is the ...

Science
Find the gravitational acceleration if a spaceship at a distance equal to double of earth's radius from the centre of the earth (g on earth is 9.8 m/s)

Science
If the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky , to be in August? Please respond as soon as you can, Thanks!

science
Which of the following is not a possible cause of mass extinction? A. Geographic isolation B. Failure to evolve C. Meteorite impact D. Temperature reduction i say A

science
When a 2.00 g sample of Al2(SO4)3·xH2O is heated to remove all water, a mass of 1.03 g remains. Determine the value of x.

science
20 gm of ice and 20 gm of hot water are mixed. When the ice is melted the temperature of the mixture was found to be 0'C, the temperature of hot taken should be (L=80cal/gm)-

science
What is not present in animal cell if nucleus is absent

Science
A science teacher was curious to see whether offering money for good grades would increase student performance on a test. The teacher offered half of the students in the class $5.00 if they got an A on their next test. The other half of the class was not offered any money. ...

Science
A student mistakenly used an ethanol solution containing an unknown ionic compound in part C of the experiment. How would this affect the Van't Hoff factor determined experimentally? Justify your answer with an explanation.

Science
If an experiment disproves a scientist’s hypothesis, what should the scientist do next? Develop a testable question. Revise the hypothesis and try the experiment again.*** Develop a theory based on the data gathered in the experiment. Change the dependent variable.

Science
In general, what would a scientist do after forming a testable question? Design an experiment. Develop a hypothesis**. Draw a conclusion. Analyze data.

Science
John took 45 minutes to bicycle to his grandmother's house, a total of four kilometers. What was his velocity in km/hr?

Science
A car travels at a constant speed of 30.0 m/s for 0.80h. Find te total distance traveled in km.

physical science(elecrostatics)
A(-9x10^-9 C) 20mm B(5x10^-9 C) (a)calculate the force between the charges (b)if A comes in contact with B Calculate the new charge on A and B

science
a tennis ball of mass m strikes the massive wall with velocity v and traces the same path.calculate the change in momentum

science
How many grams of sodium hydroxide will be produced when 23 gram of sodium reacts with wates at ordinary temperature ?

Science
How do I write the correct dissolution reaction for BaCl2

Science
How many grams should be to taken to make 0.5 molar sodium bicarbonate in 100ml soiution.

chemistry
science

science!
i want you to review the (3)descriptions and the (4)questions and correct my answers of this worksheet called Scientific Method Bikini Bottom Experiments. tank you tutors for reviewing the descriptions and questions and correcting my answers. The Bikini Bottom gang loves ...

science
we brought a block of un sliced of cheese on the same day, and isn't moldy at all

science
A scientist makes the measurements shown in the data table below. She needs to know the total volume of her other samples. which of the following shows the total volume reported with the correct number of digits and units. Samole A 12.14 ML Sample B 3.400 ML Sample c 0.7 ML A...

science
if a car travels at 93 km\h, what rate is it traveling in km\min? we haven't used km yet and i am pretty confused

science
What is an example of physical science? I know it is movement but can you give an example in a sentance and explain please?

science
1.)Which of the following identifies a measurement its si unit, and the tool most commonly used to measure it ? A.)length,meter,ruler B.)temperature, degrees Fahrenheit, thermometer C.)Weight, gram , scale D.)volume, millimeter, meniscus

science
I had objects that I had to find the source energy then what it was converted to. Please check my answers: battery Powered Drill chemical--> mechanical and thermal Lava Lamp Electrical--> thermal and nuclear

Science Energy
My assignment was to give drawn examples of the 7 forms of energy. I am having trouble with Chemical and Nuclear. My science teacher used a plant as an example for chemical energy but I don't know what she meant. Also I can't think of an example for nuclear. Would a nuclear ...

science
A box weighing 180 newtons is hanging by rope as shown in the figure. Find the tension T¿.

science
Two workers pull horizontally on a heavy box, but one pulls twice as hard as the other. The larger pull is directed at 25.0 ∘ west of north, and the resultant of these two pulls is 530.0 N directly northward. Part A Use vector components to find the magnitude of each of ...

Science
In general what would a scientist do after forming a testable questions? -Design an experiment**** -Develop a hypothesis -Draw a conclusion -Analyze data

Science
A farmer wants to determine if a new fertilizer gives her a better crop yield than her old fertilizer. She spreads the old fertilizer in field A, which has a brand new irrigation system. She spreads the new fertilizer in field B, which has an irrigation system that will be ...

Science
Hoy can i name the entire physical universe?

School of Natural and Physical Science
Why is tert. butyl chloride being washed with aqueous sodium hydrogen carbonate

physical science
Which of the following statements is NOT true? A. You are exposed to nuclear radiation every day. B. Most of the nuclear radiation you are exposed to occurs naturally in the environment. C. Naturally occurring nuclear radiation is called background radiation. D. All natural ...

Physical Science
A 144 kg park bench made of iron sits in the sun and its temperature increases from 25 degrees celsius to 35 degrees celsius. How many kilojoules of energy does the bench absorb?

science
What are 3 ways plants can reproduce? I think it is asexual and sexual but I can't figure out what the third way would be.

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