Science

Recent Questions

Science
What were five accomplishments of marie curie?

Science
I have several questions 4: The image above shows particles in a medium. Which of the following shows the best conditions for a sound wave to travel? a, b, c, d----My answer is C 12. Which letter shows the type of wave that can be seen by the human eye? a. b. c. d----my answer...

science
Suppose a scientist found a new fossil that indicated it was a primitive mammal. Relative dating techniques place the age of this fossil at a much earlier time than mammals were thought to exist. What effect will this finding have on understanding of the history of life? a. ...

Science
1.)The sporophyte generation produces spores that grow into a A.)Gametophyte B.)Gymnosperm C.)Angiosperm D.)Pupa 2.)Placental mammals develop A.)In leg an egg laid in water B.)In a pouch on the mother's body C.)Inside the mother's body D.)Inside an amniotic egg 3.)Angiosperms ...

Science
How to high-tides change? How do Low-tides change? I would figure it would be the moon and sun, but I want other people's answers. (I thank all who answer)

science
1. which of the following must occur for speciation to take place? a. a population must be physically separated into groups b. harsh environmental conditions must be imposed on a population c. competition must occur between members of a populations d. some event must occur ...

science
A dolphin swimming in seawater at a temperature of 25degree Celsius emits a sound directed toward the bottom of the ocean 150 meters below. what period of time passes befor it hears an echo?

Science
What two words do these letters spell that relates to laboratory work? aaeerrdddugictlysn

science (BIO)
Assume that two pigments, red and blue, mix to give the normal purple color of petunia petal. Separate biochemical pathways synthesize the two pigments, as shown in the top two rows of the accompanying diagram. "White" refers to compounds that are not pigments. (Total lack of ...

science
will a 19.2 bock float in water? i need help please!

Science
A gene is to a chromosome as.... a) a pea is to a pod b) a front is to a back c) a bike is to a car d) a building is to a window

Science
1.)Seahorse change color & swim together in predetermined ways before mating. these behaviors are called? A.)Asexual reproduction B.)Sexual Reproduction C.)Courtship Rituals D.)Budding 2.)A male peacock displays his colorful tail feathers in order to A.)Increase the success ...

science
1. which of the following must occur for speciation to take place? a. a population must be physically separated into groups b. harsh environmental conditions must be imposed on a population c. competition must occur between members of a populations d. some event must occur ...

Science
What is the difference between isobars and isotherm?? Thanks!!

Math in Science
Estimate the thickness of plant matter that produced a bed of coal 0.6 m thick. About how much coal would have been produced from a layer of plant matter 0.50 m thick.

science
WHAT MEASUREMENTS BEST DESCRIBES THE RESULTS OF A SCIENTIFIC EXPERIMENT REGARDING DISTANCE?

science
1. which of the following is not part of theory of evolution. a. organisms end to produce more offspring than can survive to reproductive age. b. organisms can acquire changes during their lifetime.*** c. organisms that do not survive to reproduce do not pass on their traits d...

science
1.a population of snails on an island is disrupted during a violent storm. portions of the population are carried by the storm surge to two new islands, while a portion remains on the original island creating three separate populations. conditions on one of the new island are ...

Science
What is the 5% rule for y-intercepts?

science
which of the following characteristics would you look for a piece of sandstone

Science
1. Which component of the technological system is achieved when an automobile airbag inflates? A. Input B. feedback C. process D. output I think the answer is D. Output. Possibly C. Process. Please help. It will be greatly appreciated. Thank you for your time!!!

science
Two converging lenses are separated by 50 cm, and have focal lengths of f1 = 20 cm and f2 = 10 cm, as illustrated in Figure 2. An object is placed on the left of Lens 1. The final image formed by the two lenses is located at 26.0 cm to the right of Lens 1. (a) Determine the ...

Science
CaCo3 _____ CaO+CO 2 From this eqn caculate the amount of Carbon dioxide in grams liberated by heating 25g of calcium carbonate ?

Eligugu high school science
5 kg of steel is immersed in water at 2 degrees Celsius. what mass of water is required if the final temperature is 40 degrees Celsius?

Eligugu high school physical science
A cannon with a mass of 10 tons fires a bullet horizontally with a mass of 50kg. The velocity of the bullet when it leaves the barrel of the cannon is 800 m / s. calculate the recoil velocity of the cannon.

Tourism Life Science History Maths Literacy
I'm doing this subject but in the mean time I want to go to Collage and right now I don't know what to choose time is running out becouse I'm in Grade Eleven

science
How to cal. The range of π+arcsin(3x-4x^3).give the whole solution step wise

science
calculate the ratio of momentrum when (a) velocity of an object is doubled (b) mass of an object is halved (c) both mass and velocity are increased by three times

science
23g of salt is dissolved in 100g of water at 23 k. what is the concentrarion of solution at this temperarure.

science
to find the height of a bridge over a river. a stone is dropped freely in the river from the bridge.the stone takes 2s to touch the water surface of the river. calculate the height of the bridge from the water surface (g=9.8 m/s

science
why does (second ) square occurs in the unit of acceleration

science
what is the mometum of a mass 75 kg when he moves with a velocity of 2m/s

science
combination of which two tissue. is responcible for movement in humans

Science
If 5gm KClO3 is decomposed to form KCl and O2. What is the percentage yield of reaction if 1.25 gm of O2 is produced??

Science
I need some help, this is fairly confusing to me. ______ Allows traits favorable for survival to be passed from parents to offspring. I could not find the answer to this in my textbook, any help?

physical science
Approximately how long would it take a radio signal to reach the International Space Station (ISS) at an orbital altitude of 350km?

science
What would you estimate to be the speed of a galaxy located 60 million light-years away?

Science
Connexusacadamy unit test. identify the choice that best completes the statement or answers the question. 1.Studies conducted in England during the Industrial Revolution have shown that children born to poor families were, on average, shorter than those born to wealthier ...

Agriculture,life science,maths literacy,geography
After finishing matric ,will i qualify to be lawyer,geologist,IT,police or teacher?

science
A rope is stretched between two boats at rest. A sailor in the first boat pulls the rope with a constant force of 100 N. First boat with the sailor has a mass of 250 kg whereas the mass of second boat is double of this mass. If the initial distance between the boats was 30 m, ...

Physical science
Help tires rated for 60,000 miles and tread depth of 3/8" Hoe do I estimate how much tread is worn off for every mile driven?

Science
According to the law of conservation of mass, what should the product side of this single replacement reaction look like ? A. H2 ZnCl2 B. H2 + Zn + Cl2 C. H2 + ZnCl2 D. Zncl2

Science
How do binomial or 2 part names compare with early versions of scientific names? shorter longer descriptive in English my answer is descriptive

Science
What is the total displacement of two trips one 10km north and the other 24km east

Science
The relative age of a rock is ? 1. its age based on how much carbon-14 it contains 2. its age compared with the ages of other rocks 3. less than the age of the fossils it contains 4. the number of years since it formed my answer is D

Science
which of the following is an example of a chemical change? A)Iron changes when heated B)Gas bubbles form in boiling water C) Balls of wax form when melted wax is poured into ice water. D)A gas forms when vinegar and baking soda are mixed My Choice D

Science
I am writing a mock biotechnology research proposal for class and I don't know what I should make this research plan about. What are some of the most breaking scientific news, or diseases and issues in this field(biology preferred, or chemistry) that are currently having an ...

Math,Science,Algebra,Geography
Beryl Really Likes taking care of all the details needed to finish up a project. Her Belbin Team Role is? A.)Computers/Finisher B.)Resource/Investigate C.)Sharper D.)Plant

science
1.the modern atomic model includes orbiting the nucleus. which of the following parts of dalton's 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 atoms have specific chemical ...

Math,Science,Algebra,geography
The 3 Letter code that summaries your 3 strongest career types is called your? A.)Holland-Code B.)Myers-Briggs Type C.)Teamwork Profile D.)Beblin Code

Math,Science,Algebra,Geography
the personality type theory that gives people codes based on their levels of four traits, including sensing-intuition or making of thinking-feeling is called the? A.)Holland Code B.)Myers-briggs C.)Beblin Roles D.)Team Work Profiles

Science
The spin of an object on its own axis is called

science
What is the rarest element?

chemsitry
home / study / questions and answers / science / chemistry / make sure to answer both parts: 1)balance the following ... Your question has been posted. We'll notify you when a Chegg Expert has answered. Post another question. . Question Edit question make sure to answer both ...

ap chemistry
home / study / questions and answers / science / chemistry / balance the following example of a heterogeneous ... Your question has been answered! Rate it below. Let us know if you got a helpful answer. . Question Balance the following example of a heterogeneous equilibrium ...

science
what is the half-life of the nuclide

Science please check my answer
Which of the following fossil types is best described as forming when minerals replace all or part of an organism's body? A) A mold B) A petrified fossil*** C) A cast D) A trace fossil

Science
What has the study of fossils allowed scientists to do? A) Describe the past environments and the history of life. B) Study present ocean temperatures at different depths C) Analyze the chemical compositions of sedimentary rocks and minerals. *** D) Predict which organisms ...

Science
Please help: Observations can lead to hypotheses. Hypotheses can lead to new experimentation. Which best describes an observation and hypothesis that might lead to new experimentation? A. Dr. Sattler discovers a new plant that grows near underwater volcanoes. She thinks the ...

Science 1 question
A researcher, studying dolphins in the wild, made the following sketch. Each dot on the map represents one dolphin. The area surveyed by the scientist was 1 km ^2. Based on the researcher's data, how many dolphins would you estimate to be in a 3 km ^2 area? 3 7 14 21 SORRY! ...

Science
Hydrogen gas(H2) and chlorine gas (CL2) react to form hydrocloric acid (HCL). What is the correct balanced chemical equation for this reaction? A-2H2+2CL2->HCL B-H2+CL2->2HCL C-2H2+CL2->2HCL D-H2+CL2->HCL I think C Pls Help me

science
a satellite in force free space sweeps stationary interplanetary dust at a rate of dM/dt=alpha v, where M is mass and v is speed of satellite and alpha is a constant. the tangential acceleration of satellite

Science
Many stems hold leaves high. Higher leaves are more likely to get sunlight. How is this helpful to a plant? I don't understand

Physics
I am in 8th Grade G/T Science, and I had a question in an online test I didn't understand: An object is traveling at 8.1 m/s. Over the course of 5.3 seconds, it accelerates at a rate of 2.8 m/s2. What is its final velocity (in m/s)? Can you please help me answer this question...

H S Algebra
Kelly made a 94 and an 80 on the first two science tests. What does she need to make on the third test to have at least a 90 average in the class?

English
Identify the choice that best describes the word "sometimes" I sometimes read the science section of the Sunday Newspaper. article adjective proper adjective adverb*** *** - My Answer

English
Identify the choice that best describes the word "strongly" However, when a science article is about something that strongly appeals to me, such as snowflakes, I become interested. article adjective*** proper adjective*** adverb *** - My Answer Not sure whether adjective or ...

English
Identify the choice that best describes the word "reassuring" Although I do not pretend to understand the science behind it, this is reassuring to me. adverb*** adjective article compound adjective *** - My Answer

Science
Three major branches of earth science: Meteorology Geology Oceanography

SCIENCE
which of the following allows a plant's vascular system to work as a transport system? A. a plant's vascular system is made up of specialized cells that move around the plants as it grows. B. a plant's vascular system is made up of specialized cells that are covered in a thick...

Science
a gummy bear experiment a solution of hot water and acid is used to see which solute would make the gummy bear dissolve faster. What is the dependent variable? Gummy bear Independent variable: hot water, and acid

Science
What are the advantages and disadvantages of Mathematical model - disadvantage: it often cannot account for all possible factors Advantage to a mathematical model is it can be applied to categories of any size and can predict complex events Physical Model - Disadvantage: they ...

Science
which pair of terms correctly completes the diagram with (a) before "spores" and (b) after "spores"

Science
Angiosperms & Gymnosperms both produce? A.)Flowers B.)Cones C.)Spores D.)Seeds

Science
In ferns, the sporophyte produces(1 point) A.)CONES,WHICH GROW INTO A GAMETOPHYTE B.)GAMETES, WHICH GROW INTO A GAMETOPHYTE C.)SPORES, WHICH GROW INTO A GAMETOPHYTE D.)SEEDS, WHICH GROW INTO A GAMETOPHYTE ?

Science PLEASE help!
What is the difference between a scientific theory and a scientific law?

Science
A student measures a room to be 20.0m*17.16m. Which of the numbers below represents the room's area with the correct number of significant figures? A) 340 meters squared B) 343 meters squared C) 343.2 meters squared D)343.20 meters squared

Science
Why is the use of the inquiry process a practical way to approach science? 5 points My Answer: The inquiry process is a practical way to approach science because the inquiry process begins by asking questions and moving on from there. In science it is important to investigate ...

Computer science
Need help on how write this program. "The Eversoft Eraser Company has a list of its customers’ names (not necessarily in alphabetical order) and telephone numbers in a file named "customer" with records of the following form: last_name (String), first_name (String), ...

Science
Does Chewbacca have a human like wiener or is it one of those red rocket type deals? George Lucas won't answer my emails.

science- physics
A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.3 m/s/s.How much time elapses before the motorcycle is moving as fast as the car? How far is the motorcycle from the car when it...

science
titanium reacts with oxygen a chemical change or a physical change

Science PLEASE HELP
Could a mixture be made up of only elements and no compounds? Explain why or why not.

science
when an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183C degree and the other has a boiling point of -253C degree. Has a physical or chemical change occurred?

Science
Could a mixture be made up of only elements and no compounds? Explain why or why not.

Science
At a constant velocity, a 5kg bag of cement is pulled straight up a 7m wall. How much work is done by the puller? W(J)=F(N)*D(m) (Gravitational pull is 9.8m/s to the second power)

science
A system is a group of connected parts that work together as one to produce a particular result. Let’s say that you go to the Smoothie station and get a banana strawberry smoothie. Describe the main parts of this system- input, process, and output. ...

physical science
. You make the following measurements of an object: 22kg and 42m3. What would the object’s density be? Show your work for credit and include final units.

science
a stone is falled from a tower of height of 500 m into a pond water. When did we hear the sound of the stone, contact with water from the tower. If velocity of sound is 340m/s and accelaration of gravity is 10 m/s2

Computer Science
0 down vote favorite I have to print: Ain't no sunshine when she's gone It's not warm when she's away. Ain't no sunshine when she's gone And she's always gone too long Anytime she goes away. How would I used methods to print these no loops? Would it be something like this: ...

Mathematics in Science
Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 17.10 m wide by 13.0 m long. 17.10*13.0=222.3 m^2 is this right?

english composition
Biosocial science is a new area of science that has developed from recent discoveries. These discoveries include new information about the nature versus nurture debate, cultural determination, and genetic and behavioral tendencies. Researchers hope this new area of study will ...

science
Compare how your weight, mass, and the normal force exerted by the floor change when you are in an elevator that starts from rest and accelerates upward.

science
The net force on a rock with a mass of 2.0kg is 19.6N. What is the acceleration of the rock?

science
True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of particles must have the ...

Science
I have homework in which it asks "Describe the difference between elements, mixtures and compounds. (I have done the first sentence as it was fairly easy. Next is the part I don't understand) You need to draw their chemical formulae (for example KCl for potassium chloride) and...

Science
True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of particles must have the ...

physical science
How do I calculate this problem? How much water vapor is produced for each amount of propane burned. Mass of c3h8 reacted 44, mass of O2 reacted 160, mass of CO2 produces 132?

science
a student is observing a rock. which of the follwoinf is an observation 1. the rock is 55g in mass 2. the rock is over billions of years old

Science
I have two containers, one is 2ml and the other is 5ml. Which would fill both containers all the way. A.gas B.liquid C.solid D. a combination I believe its A. I am right

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