Science

Recent Questions

science
Felipe made a toy boat out of clay, but it kept sinking in water. He changed the boat's design by making it slightly wider than before. Why did Felipe's newly designed boat float on water? A. He decreased the density by increasing the volume. B. He decreased the density by ...

Science
In a expiriment to determine whether moment is conserved. You shoot a dart into a cart. You know both the mass of the dart and the distance between them. You also know the distance after the dart and cart joined together. The speed can be calculated both before and after the ...

science
A 0.1 M NaOH solution is used for holder 50, or ml of a 0.100 M solution of acetic acid. Calculate the pH of the solution after the addition of 50.0 ml of sodium hydroxide

political science
Which of the following is NOT a component of judicial review? The supremacy of local laws when they conflict with national laws or treaties. The power of the courts to declare national laws invalid if they violate the Constitution The supremacy of national laws or treaties ...

political science
On the spectrum of international ideologies, what group is most likely to oppose other nations monitoring human rights conditions in the U.S., and favor national tariffs, import quotes, and government subsidies to national businesses? International Communitarians International...

science
Calculate the pH of a solution of ammonium acetate (CH3COONH4) 0,85M knowing that for NH3 Kb = 1,79x10-5 and CH3COOH Ka = 1,76x10-5 and commented on the result obtained. Then calculate the percentage of acetic acid product at equilibrium

science
Calculate how many grams of NaOH must be added to 75.0 ml of H2SO4 1,000m to get a tampon that has pH = 1,920

6th Grade Science - Connections Academy
Asexual reproduction is common in _____. A. Mammals. B. Frogs. C. Fertilization. D. Bacteria.

science
A truck travelling down the hill at constent acceleration. If it teavell 300m in 15s calculate it acceleration

Science - Chemistry
1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of the ____. 2. The description of the structure of the atom is called the ___. 3. In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A _____ bond is...

Science Check answers
2) What phenomenon naturally warms Earth's lower atmosphere and surface? • the formation of sunspots • changes in the shape of Earth's orbit • global warming (MY ANSWER) • the greenhouse effect 3) Which of the following is an example of human impact on climate changes...

Science
Compare a desert ecosystem and forest ecosystem.

Science
Please chrck my answer! How does a galvanometer use a magnetic field to indicate the strength of an electric current? When a current is passed through a magnetic field, it goes through a coil and to a galvanometer.

Science
Please help?!? In figure 20-1, where is the field of each charge the strongest? The picture shows A. A postive charge with arrows facing out and B. A negative charge with the arrows pointing in. This is a short answer question, but I don't understand what kind of answer they ...

Science
Check this Compare renewable and nonrenewable energy sources, and discuss the effects of each on biodiversity. My answer Renewable resources are things like the wind and sun. You will never run out of these things. Nonrenewable resources are things like fossil fuels. We will ...

Science
Someone check this please Consider a wetland ecosystem similar to the one shown in the image below. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor....

science
A stone of mass 20g is projected vertically upward with a catapult whose rubber has a force constant of 72Nm-1. If the tension in the cord at the point of release is 36N, find (a) the velocity of projection of the stone (b) the maximum height attained by the stone

science
A 9-volt battery supplies 0.125 A of electrical current to a toy car. The car has a mass of 0.100 kg and the coefficient of friction between the tires and the ground is 0.4. If the car is 100% efficient, how far will the car travel in 10 seconds?

science
A 2 kg mass is hanging from a spring with a constant of 1500 N/m. What is the elongation of the spring?

Science
A 2 kg mass is hanging from a spring with a constant of 1500 N/m. The mass is pulled down a distance of 0.3 m and then released. If the specific heat capacity of the spring is 0.35 J/gK, the spring has a mass of 10 g and the initial temperature of the spring is 20 degrees ...

science help pls pls
One group of scientists has proposed a new theory on Adaptation. A majority of scientists worldwide agree with the theory. The theory is most likely biased. incomplete. accurate. unchangeable. is it accurate pls help me

Science
How does light traveling through different mediums change the angle of refraction?

Science
How would you prove that sodium hydroxide is a base without using a litmus paper to test? Give the equation for the reaction?

Science
Hello I just want to know how to calculate the velocity from the given infomation: there is a dart shot from a dart gun and is flying towards an object. For the dart to hit the object, it took 18 frames. There is 240 frames in one second. The distance is 45cm from where the ...

SCIENCE PLEASE HELP
•What are earthquakes? •Where do they occur most often? Why? •How likely is it that your area will experience an earthquake? •What are the types of seismic waves? Describe/explain each of them. •What instrument do seismologists use to measure/detect seismic waves...

Science
A solution contains 60g of sugar in 480g of water calculate the concentration of solution in terms of mass by mass percentage of the solution

Science
Name two types of evidence used to support the theory of evolution explain how scientists use each type of evidence to provide support for evolution. give one example of each

Science
Name two types of evidence used to support the theory if evolution. Explain how scientist use each type of evidence to provide support for evolution. Give one example of each

Science
The compound which will form the strongest dipole between CCl4;CO2;BF3;HCL;PF3

Army school science
What is intial velocity?

science
which of the following does not change when a car keeps a constant speed but changes direction

Science
In a series circuit if the circuit resistance is 560ohms and the inductive reactance is 1200ohms, what would be the voltage drop across the inductor

SCIENCE
Which of the following gases occupy the smallest volume at STP? a 4.032 g H2 b 1.000 mol of carbon dioxide c 6.022 × 1023 molecules of O2 d 35.45 g Cl2

Probability
Mr.Roy needs two students to help him with a science demonstration for his class of 18 girls and 12 boys. He randomly chooses one student who comes to the front of the room. He then chooses a second student from those still seated. What is the probability that both students ...

Re-post - Science - from Spitfireredhead
Posted by SpitFireRedHead on Wednesday, April 27, 2016 at 8:23am. Please check this. Thanks! 1. Which of the following shows fossils as evidence of continental drift? a. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in ...

science
how would you produce a pure sample of hexane

Science
Im sorry i am totally stumped What is the main difference between mechanical and electromagnetic waves A. Mechanical waves involve the transfer of energy; electromagnetic waves do not B. Mechanical waves require a medium to travel in; electromagnetic waves do not C. Mechanical...

physics
home / study / science / physics / questions and answers / a 10kg block slides towards the 3kg moving block ... Your question has been answered! Rate it below. Let us know if you got a helpful answer. Question A 10kg block slides towards the 3kg moving block to create a ...

physics
home / study / science / physics / questions and answers / a block of mass 3kg s sliding along the frictionless ... Question A block of mass 3kg s sliding along the frictionless horizontal surface with a speed of 2m/s. 1. What is the kinetic energy of the block? 2. A wedge is ...

Science
Which of the following statements is true about Earth's magnetic poles? A.They are located at earths geographic poles B.They are the areas where Earths magnetic field is weakest. C. They are the areas where Earths magneic field is strongest. D. Earth has one dominant magnetic ...

science
which of the following cellular organelles is responsible for realising the energy contained in food

Science "HELP"!
1.)A vacuum flask keeps its contents warmer or cooler than the surrounding environment for a length of time. It consists of two flasks, one inside the other, that connect at the neck. The space between the two flasks is COMPLETELY empty of air. A)- One flask is smaller than ...

Science (please check Ms. Sue)
Please check this. Thanks! 1. Which of the following shows fossils as evidence of continental drift? a. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in Scotland’s highlands. b. Mesosaursus, an ancient reptile, had been...

science
The angle between incident ray and the mirror is 30° a. What is the angle of incidence b. What is the angle of reflection?

science
What is the Biosphere ?

science
Give five application of Doppler Effect in science

SCIENCE PLZ HELP YES OR NO ANSWER
DOES THE GALAXY ANDROMEDA HAVE A SUN? I THINK IT DOESN'T BUT IM NOT SURE PLZ HELP THX! ~Sparkles_01

Science
if you had a real thermometer that was accurate how could you modify your experimental thermometer to read actual temperatures

Science
2.)you had a real thermometer that was accurate, how could you modify your experimental thermometer to read actual temperatures?

science
how can I discuss how Mendeleev's periodic table relates with the modern one

Science
how does changing temperature affect inland and coastal areas? Please give me a brief explanation.

science
Calculate the emf of the cell CR|Cr3+(0.1M)||Fe2+(0.1M)Fe Given, E°Cr3+|CR = -0.75v E°Fe2+|Fe = -0.45v Cell reactn 2Cr(s)+3Fe2+(aq) -> 2Cr3+(aq)+3Fe(s)

science
Calculate the EMF of the cell CR|Cr3+(0.1M)||Fe2+(0.1M)|Fe Cell reaction- 2Cr(s)+3Fe2+(aq)->2Cr3+(aq)+3Fe(s)

Science
An organisms particular role in its habitat is or when and how it survives is called its what? A.carrying capacity

Science help ASAP
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

science (URGENT!! CORRECT PLEASE))
(1) The inputs for cellular respiration are: A) Nutrients and carbon dioxide B) Energy and carbon dioxide C) Nutrients and oxygen D) Energy and oxygen ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ My Answer: B ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (2) The outputs for cellular respiration are A) ...

Computer science
I want to make my traffic lights run automatically without any user input. I have created this code so far but the images don't show up please help. My code: <!DOCTYPE html> <html> <head> <script type="text/javascript"> var lights=["red.jpg","redamber....

SCIENCE
I mix 300.0ml of the barium nitrate solution from 1c with 100ml of a 1.50M lithium phosphate solution. The reaction produces solid barium phosphate a. Write a balanced equation for the reaction. b. Which is my limiting reagent? c. How much barium phosphate may be produced in ...

computer science
Internet Service Provider An Internet service provider has three different subscription packages for its customers: Package A: For $9.95 per month 10 hours of access are provided. Additional hours are $2.00 per hour. Package B: For $13.95 per month 20 hours of access are ...

Science
100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. Ans is 0.227M

Science
25 g of Iron (II) Oxide reacts with 25 g of Chloric acid to produce Iron (II) chlorate and water. a. Determine the limiting reactant b. Determine the excess reactant c. Determine the theoretical yield of water d. Determine how much excess reactant is left e. Determine the ...

Science
18 g of hydrochloric acid reacts with 15 g of calcium hydroxide produce calcium chloride and water.

Science
A sphere of mass 30.0 kg and radius 0.150 m is attached to a point on a smooth vertical wall by a string of length 0.150 m which runs from a point on the surface of the sphere to the point on the wall. Find the tension in the string and the horizontal force applied to the ...

Science
I need help on an I am poem for sodium can you help me ? Thank you for you time :)

science
The engine of 300kg dragster exerts an average of forward of 53000N over the first 20m of it's race.the dragster takes 0,8 sec to cover the first 20m calculate the work done by the engine

science
when solid aluminum is heated with chromium(II) oxide, solid chromium and aluminum oxide are produced. If you are using 125 g of aluminum and 225 g of chromium (II) oxide, how many grams of chromium are produced. If you actually collect 110g of chromium wht is the percent yield?

Science
A jar contains 100 mL or a 4.0 M silver nitrate solution. What mass of solid copper would you add to bring all the silver out of the solutions as a solid?

life science
Define the 2 concepts: fraud and corruption and and give examples of each

Science
Two charges +1C and -1C are placed at distance 1m apart ,each having masses 2kg respectively are released.what is the type of collision they experience?

Physical science
The bullet strikes a stationary of 5kg wooden block fixed to a flat,horizontal table.the bulletis brought to the rest after travelling a distance of 0,4m into the block.calculate the magnitude of the average force exerted by the block on the bullet

science
How many hydrogen atoms are present in 32 grams of methane?

Science
1. Which of the following could be an engineering project that could better protect the planet? -finding a new landfill site -designing a better trash compacter -deciding which product can be recycled*** -growing microbes that eat oil 2. Engineers who are working to find ...

science
explain why the surface tension of water is greater than that of methylated spirit?

Science
In which statement is the tanning me supporting facts and examples being used . A( … It was countries and then individual cities that had collections of exotic animals for people to come and see and they were no longer reserved for the wealthy rulers B( The zoo should be ...

Science
Which one of following could be the molecular formula of vitamin A? Options C20H30O , C12H18N4Cl2OS, C17H20N4O6, C9H17O5N.

science 6th grade
1.the nose diaphragm and lungs are part of the_________system circulatory excretory nervous respiratory(my answer)

Science
What is the velocity of a block of wood 3.0 cm on each side that has a mass of 27g? Will it float on water?

math
Julian spent 45 minutes doing his math homework. He spent 35 minutes doing his science homework. Afterward, he did his reading homework. He ended up studying for 2 hours and 15 minutes altogether. How long did it take him to do his reading homework?

Science
what is the nature of mixture when 10gram ice is mixed at -20degree centigrade us mixed with 50gram at 120 degree centigrade?

Science
A man has a mass of 70 kg on earth .Calculate its mass and weight on moon

Science - Chemistry
Calculate the amount of energy a woman takes in during a year on a 2200kcal a day diet (1 calorie = 4.18J). Calculate the amount of energy she spends in driving 5000 miles a year at 40 miles to the gallon of octane, given 1 gallon of octane weighs 3.12 kg, and standard ...

Science- Density
I'm having difficulty understanding density. I am trying to relate the concept of density to brownies. Should a brownie with baking soda have a higher or lower density compared to a brownie with no baking soda? Does a thick brownie mean a high or low density? When it says high...

Science
Why is it important for the substances to start at the same temperature??

Science
I am doing an extension to get into the AP Biology course offered by my school. This particular extension asked me to use vinegar and baking soda aswell as some basic scientific tools to find the concentration of acetic acid in vinegar. I wanted to know what a procedure for ...

mathslit accounting life science tourism
what am I become with these sub guys help plz

Science
Four equal point charges each 16 microcoulomb are placed on the four corners of square of side 0.2m.Calculate the force on any one of the charge.

science
An athlete runs along a circular track of radius 20m.Calculate the distance and displacement covered by him after completing one and a half round.

science
A 5 C charged is placed on the 0 cm mark of a meter stick and a - 4 C charged is placed on the 50 cm mark what is the electric field at the 30 cm mark

science
H2SO4 is labeled 93.2% and density 1.94g/cm3. Find moles in H2SO4?

Science
What is conductor

science
what is the function of pore in a cell membrane

Natural science
What happens to the level of the salt solution in the distilling flask ? Explain why this happens

Computer science
How do I count how many arrays there is - what do I add to the code? I have managed to create 2 buttons and the top button works and changes the fruits into alphabetical order but the second button doesn't work - please help! <!DOCTYPE html> <html> <body> <...

life science, maths lit,agric,geography, life orie
Criticality discuss six way that human Rights violation influence individually, groups and broader south African community

science
6co2(aq)+ 12h2o(l) c6h12o6(aq)+6o2(aq)+602(a90 q)+6h2o

Science/Math
A car is travelling at a speed of 30.0m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop at -4.0m/s^2

Science
An atom has a mass number 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.

science
describe fully the image of a candle flame located 10 cm from a concave spherical mirror with a radius of curvature of 16 cm

H/science
What Is Health Science

science
What will happen when titanium reacts with oxygen?

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