Science

Recent Questions

Science
2.)A car driver accelerates to a speed of 35 mph and then takes her foot of the gas pedal.Even though she does not press the brake pedal at any time,she eventually rolls to a stop.which of the following most likely causes the car to come to a stop? A.kinetic energy is ...

math,economics,geography and life science
what courses can i apply for with the following subjects Math Geography Economics Life science

Science
4.)which of the following is the best example of transforming electromagnetic energy into thermal energy? A.when trees absorb sunlight for photosynthesis. B.when the interior of a car absorbs sunlight and warms up.*** C.when a solar panel absorbs sunlight to make electricity (...

science (URGENT!! CORRECT PLEASE))
(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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ My answer: D ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (2) Which foods are lipids found in...

Science
3.)Shoe companies imbed unique designs on bottom of the sneakers they manufacture.what is the made n purpose? A.)to increase potential energy B.)to decrease friction C.)increase friction D.)to decrease potential energy C?

Science
2.)A car driver accelerates to a speed of 35 mph and then takes her foot of the gas pedal.Even though she does not press the brake pedal at any time,she eventually rolls to a stop.which of the following most likely causes the car to come to a stop? A.kinetic energy is ...

Science
when you turn on a battery powered flashlight, you transform A - Heat energy into light and chemical energy. B - Chemical energy into electrical energy and light.*** C - Heat energy into chemical energy and light D - Electrical energy and light energy into chemical energy. B?

science
I believe the angle of refraction will be ___________ when it goes from a ________ to a _______________ because ____________________________________. I have this on a question and I'm not sure how to answer it. Help?

Science chemestry
calculate the average rate of a reaction. He placed 10.00 g piece of aluminium into 6.0 M HCl. After 20 s. he found that 4.50 g of unreacted magnesium remained. Calculate the average rate at which magnesium was consumed by the acid. #not I really do not understand the ...

Science
I want answer for force at a distance examples

Science
Starting with 100 grams of uranium-238, after one half life has gone by, how many grams of uranium-238 will remain?

Science
Calculate the number of g-atoms in 3.5g nitrogen

Science
You observed light passing through lenses and through a set of prisms. Why does refraction occur? Include your lab observations in your answer. Respond to at least two other posts and evaluate the thoroughness and accuracy of each response. Can you please explain this or break...

political science
One of the main differences in passing a bill is that the House has a _____ which the Senate does not. rule committee lower requirement for passage veto power fast-track committee its the veto power?

political science
Which of the following is NOT considered a critical election? William McKinley (1896) Theodore Roosevelt (1904) Abraham Lincoln (1860) Franklin Roosevelt (1932)

political science
As US ambassador to the United Nations, Samantha Power has what rank compared to other members of the executive administration? cabinet committee sub-committee sub-cabinet

political science
During the 2nd Party System in American politics, parties moved from a ______ in Congress to a _______ in order to pick candidates and develop a party platform. caucus; national convention informal poll; direct primary caucus; direct primary random selection; direct primary

science
What effect does green filter have on pink flowers??please help me now.I am waiting.thank you

Science
A car is traveling 20m/s brakes and takes 3 s to stop.What is the acceleration in m/s

science
If you place a green filter in front of a white light and shine it on a pink flower,what colour will it change into.what effect did the green filter have on the pink flower.Explain the reason for the change in colour..THANK YOU:-)

science
Explain the reasons for the change in colours

science
What effect did the green filter have on the pink flower

science
a car with two passengers travelling at 15m/s collides with a tree. one of the passengers who is not wearing a seat belt strikes the windshield head first and comes to rest in 0.03 s. the area of contact between the head and the windshield is approximately 5 X 10 to the power ...

physical science
When a rocket is 3km above the ground,it has an upward velocity of 10 m.s^-1.A booster rockect is fired downward,resulting in a net force of 6000 N being exerted upward on the shuttle.The time it takes the booster to leave the shuttle after being fired is 2,5 seconds.if the ...

Computer science
Is computer a system?

Science
Calculate the frequency of rotation of the second hand clock

Science Please Help!!!
State how matter moves through the biosphere. State how energy moves through the biosphere. Explain each statement using examples to illustrate your explanation. What are some examples of each way of movement through the biosphere? Can someone please help??? Thanks! (=

Science
A fossil for an extinct organism is found in layer B. A fossil for another extinct organism, very similar to the first, is found in layer C. What might be the relationship between these two organisms. Im so confused, can someone help.

Math, science
in 2009 an earthquake of magnitude 6.7 shook the kermadec islands off the coast of new zealand. also in 2009 an earthquake of magnitude 5.1 occured in the alaska peninsula. How many times stronger was the kermadec earthquake. Use formula log (I1/I2)=m1-m2 A.39.811 B.20.593 C.5...

maths,science,agriculture
What requirements are going to be needed for studying VET at tertiary institution

science
need to make a silent proof box 15,000 cubic centimeters. What is the dimensions? I am having a hard time figuring it out.

Science
Two pellets, each with a charge of 1.5 microcoulomb (1.5×10−6 C ), are located 2.8 cm (2.8×10−2 m ) apart. Part A Find the electric force between them.Part B What would be the mass of an object that would experience this same force in Earth's gravitational field...

math, science, hindi, english, sst
In triangle ABC, AB=4cm, AC=8cm and AM=3cm. AM is the median which meets BC and M. Then, BC is equal to

Maths Lit,English Fal,IsiZulu,L.o,Agricultural science,Geography,Life science
wich university i could fit in with this subject? and how many point do i need?

physical science
A car starts from rest and accelerates uniformly for 250 meters. It then moves with a constant velocity for 500 meters and slows down to rest in 300 meters. The whole trip takes 50 seconds. How long did the car move at constant velocity?

Physical Science
Please check my answer!! I would be great if you could explain this to me a little as well... To find the amplitude, measure_____ a. the horizontal distance between consecutive positions b. the horizontal distance between a consecutive crest and trough c. vertical distance ...

Science
What is one condition that is necessary for a hurricane to form? Warm Ocean Water A strong Cold Front Cold ocean Water A strong warm front I think it's C but I want to make sure...

Science Please help ASAP
which geologic feature is most likely to form at a mid-ocean ridge? Peninsula Volcano Delta Plateau Thanks!

Science
A chemistry teacher needs to prepare 750 ml of a 2.5M solution of Potassium iodide for a lab. How many grams of potassium iodide will be needed to make the solution?

Science
potassium metal reacts with water to give potassium hydroxide and hydrogen gas How to balance this equation with proper steps?

science
a rectangular piece of wood measuring 20cm by5cm by3cm weighs 900kg.find the greatest pressure the piece of wood can exert if placed on a table

Pure Science
What Happens(in terms of floatation and sinking )When A Solid Object e.g a stone is placed in a liquid like water if they both have equal densities?

science
What does the surface temperature of the water affect?

science
according to wegeners hypothesis of continental drift ? A. Earths surface B. The continents C. Earth is slowly cooling and shrinking D. The continents joined

science
describe the function of each of the above organelles. in addition, compare each organelle to something else (examples: the nucleus is like a boss because both are in control of something larger

science
if sulfur is in excess then production of 2 moles of ferrous sulfide requires how many gram of iron?

Science
What are the basic points of Lewis and langmiur theory of electrovalency

science
a 600 g pool ball moving at 2.0m/s hits a second pool of the same mass at rest. the first ball moves off at 1.5m/s at an angle of 30 degrees from the original direction. assume the surface of the pool table to b frictionless find the angle at which the second ball moves off ...

Chemistry of Life Science
1. In the introduction to this experiment, it states that you reacted 2.5 grams of salicylic acid with an excess of acetic anhydride, meaning that there would be a higher number of moles of acetic anhydride then salicylic acid, proportionally. Assuming the density of acetic ...

math
In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 degrees Fahrenheit at an average rate of -12 degrees per hour. Over how many hours does the change take place?

science (9th grade)
A form of 18 karat white gold contains 75% gold and 25% palladium. What type of solution is this? Specify which element is the solute and which is the solvent. help???

Science
Why is a gas able to flow? It's particles have melted and can move around. It's particles have high viscosity and can move around. It's particles have enough energy to move around. It's particles have enough pressure to move around.** not sure of the answer. please help :)

science
apparent change in wavelength of sound waves is 2.5cm when the source of sound is approaching stationary listener with velocity 8cm/s.

Science
What is anything that has mass and takes up space? 1) Weight 2) Volume 3) Density 4) Matter When you measure the boiling point of mercury, you are investigating a ____. 1) Chemical change 2) Chemical property 3) Physical change 4) Physical property Ab object weighing 90 N has ...

science
7, 2g of sodium carbonate, Na2Co3.nH2O is strongly heated and a residue of 2.7g are produced..... Calculate the nber of moles of water

Science
Hi do you guys know Lesson 2: Natural Selection Unit 3: Natural Selection and Adaptation in connexus 7th grade the portfolio. please I need help

math,science,tourism,geography
First option i want to be a social worker.sec option to be a police.last option is be a tourism management. Where do i go to further my study and what are the reguirement for this courses?

Science PLZ HELP NOW!
hi,can someone check my science work...and please label like this 1.right 2.wrong thank you 1.which of the following could be true of two different species that have a competive relationship in the same ecosystem? A.one species preys on the other B .the relationship is ...

science
apparent change in wavelength of sound waves is 2.5cm when the source of sound is approaching stationary listener with velocity 8cm/s.Apparent decrease in the frequency of source when observer recedes from the same source at rest with a velocity of 30m/s is (velocity of sound...

science:chemistry
magnesium trioxocarbonate (IV) decomposed according to the equation MgCO3(s) -MgO2(s) + CO2(g).if 6.0g of magnesium trioxocarbonate (IV) is completely decomposed ,calculate :i. the mass of carbon (IV) oxide produced

Science
If you find a mysterious organism, how can you figure out whether or not it is a plant?

science
Rocky (terrestrial) refers to the

science help pls pls
Which of the following is a myth about water conservation? An important part of water conservation is preventing water pollution. Buying bottled water conserves more water than drinking from the tap. Air-drying clothes conserves more water than using an electric clothes dryer...

science help pls pls
Which of the following best explains how water conservation can reduce waterborne diseases in a community? More people will have clean water to drink and bathe in. More people will drink bottled water imported from faraway springs. More people will be encouraged to visit the ...

science
im doing a powerpoint on valleys and i need some facts if there some websites you can send me too that wood be graet

science
What is the density of a copper sample that has a mass 90.0g and volume of 10g

Science
Compare renewable and nonrenewable energy sources, and discuss the effects of each on biodiversity.

body science
I have to do this for an open ended question on my unit test and i am not sure if i did it right can you please check my answers? It is fill in the blank. And the choices are: Arteries,Artium,Body,Carbon Dioxide,Lungs,Veins,Ventricle. You may youse these words more than once. ...

Science
what volume of air containing 20% O2 will be required to burn completely 10cm3 each of methane and acetylene?

science
A pistol that fires a signal flare gives the flare an initial speed of 180m/s. Air resistance is ignored. (a)If the flare is fired at an angle of 55° above the horizontal, what is the horizontal range? (b)If the flare is fired at the same angle over the flat of sea ...

Science
.a sodium atom has the following distribution of electrons in its energy cells: shell1: 2 electrons shell2: 8 electrons shell3: 1 electron I think its shell 2

science
density of gold is 19.32 g/cm^3.A piece of gold leaf is 2.50 cm on each side and 0.100 mm thick,How many atoms of gold are in this piece of gold leaf?

Science
If you find a mysterious organism, how can you figure out whether or not it is a plant?

Science
Is all light energy Solar energy?

science
why does nicotine make it difficult for a smoker to quit using cigarettes it helps with weight loss for for many people it makes people sleep long hours many people experience intense headaches the cost of nicotine is very affordable for teens

Science
Why do scientists study images made with parts of the electromagnetic spectrum other than visible light? A)These images are the only way to observe galaxies beyond our own. B)These images reveal information that visible light does not show. C)These images show important data ...

Science
Refracting telescopes use lenses. Reflecting telescopes use mirrors. However, both types of telescopes have something in common. How are both types of telescopes similar? A)They both magnify tiny nearby objects. B)They both reflect light that enters the telescope. C)They both ...

Science
Karen is studying types of spacecraft. Which of these spacecraft can people use to travel to and from orbits close to Earth? A)space probe B)space shuttle C)space station D)space telescope I think the answer is C.

Science
What is the best explanation for why scientific theories are modified? A)Theories more than ten years old are usually out of date. B)Scientists want to prove that the work of other scientists is wrong. C)New evidence that supports a revision prompts scientists to modify the ...

Science
PLEASE HELP 1. Katie is bowling. She starts with the ball in her right hand and her arm as far back as it will go. She swings the ball forward, applying a force of 78 Newtons the whole time. When her hand has traveled through a path of 0.9 meters, she releases the ball, and it...

Science
A boat moves at a speed of 15 km/h in still water. The river it is traveling in flows at a rate of 3 km/h downstream. What is the velocity of the boat if it travels downstream? What is the velocity of the boat if it travels upstream?

Science
The compound KCIO3 decomposes according to the following equation 2KCIO3- 2KCI + 3O2

science
The reaction H 2 CO 3 + H 2 O ↔ H 3 O + + HCO 3 – takes place in water. What happens to the equilibrium when the pressure is increased ? A-It favors formation of reactants. B-It favors formation of products. C-It does not change. *** D- It is conserved.

Engineering science
2. A wooden block slides directly down an inclined plane, at a constant velocity of 6 m/s. a. How large is the coefficient of kinetic friction if the plane makes an angle of 25 degrees with the horizontal? b. If the angle of incline is changed to 10º, how long far will the ...

Science
which of the following statements best describes the energy of a waterfall? A) The water has Kinetic energy because of its position at the top of the water fall B)potential Energy changes to Kinetic Energy as the waterfalls. C)kinetic energy changes to potential energy as the ...

science help PLS
Which of the following is a sign of poor quality water? Zero turbidity A pH of 7.0 High phosphate content High dissolved oxygen

science help pls pls
Which of the following is typically associated with a large amount of organic material in a water supply? Lower turbidity Higher phosphates Fecal coliform High dissolved oxygen is it c pls help

science
Magnesium can react with aqueous nitric acid, HNO3, to form hydrogen gas and magnesium nitrate. Write down the balanced chemical equation for this reaction, remembering to use the state symbols.

Physical science 7th grade
What is the internal structure of the cavefish and the minnow suggest common ancestry?

science
the mean weight of 500 males students at a certain college is 151 lb and standard deviation is 15lb .assuming the weights are normally distributed, find how many students weigh between 120 and 155 lb ..ii) more than 185 lb

computer science
how to write c++ program to compute to display natural number between 1 and 30 which are divisible by 12

Computer science
Is computer a system?

Science
A transformer with 1890 turns in its primary coil has to decrease the voltage from 4620 V to 220 V for home use. How many turns should there be on the secondary coil?

science
How do everyday activities like driving a car and using electricity led to global warming?

maths lit, life science,History,English,Afrikaans,
I want to become an astronomer so I was wondering if it's possible to study for one or wht help me plz ???

SCIENCE
HOW MANY TERMS OF GP 1,2,4,8..... GIVE A SUM GREATER THAN 500.

science
calculate the velocity of a car increases from 54km 1hr to 72 km/hr if the mass of the car is 1500kg find the work done to increase the velocity

Science
What is the relationship between number of loops on an electromagnet and the strength of the magnet? Can you help e or break this down for me please? @Ms.Sue thank you

Science
Provide three statements that demonstrate the importance of units when describing motion. (3 points) Can anyone help me with this? I don't understand what they want

Science
The ratio of numbers of moles of butane to the number of moles of oxygen necessary for a complete of butane is

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