Science

Recent Questions

Science
Which foods are lipids found in, and what is their function in the body? A: lipids are found in sugars and starches and are the main source of energy for the body B: lipids are found in fats and oils and are an essential component of cell membranes C: lipids are found and fats...

Science
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
Is the gene for sickle cell anemia more likely to be dominant or recessive?

English
What is the warrant in this article? BOULDER, Colo. — JUST after Christmas, Veronica Rutledge of Blackfoot, Idaho, took her 2-year-old son to a Walmart store to spend holiday gift cards. As they strolled by the electronics section, according to news reports, the toddler ...

English
What is the claim, warrant, and grounds in this article? Smart Guns Save Lives. So Where Are They? BOULDER, Colo. — JUST after Christmas, Veronica Rutledge of Blackfoot, Idaho, took her 2-year-old son to a Walmart store to spend holiday gift cards. As they strolled by the ...

Science
A small fish in the Pacific Ocean watches a shark swim by a large rock a few meters away. Which of the following is the the reference point in this scenario? A. Shark B. Large rock C. Water D. Pacific Ocean Is the answer C? Thank you

science
how many milliliters of .2 M sodium hydroxide are needed to completely neutralize 25.0g of sulfuric acid

Science
What are 5 key accomplishments of Marie and/ or Pierre Curie?

science
An experienced mountaineer decided to climb mount everest using the same route in the same season and with similar materials and equipment used by a fatal 1924 expedition . The scientific purpose of such a climb would be to

Science
14. The speed of sound depends on (1 point) A.the loudness of the sound. B.the pitch of the sound. C.the source of the sound.*** D.the properties of the medium it travels through

Science
How does radioactivity make it possible to understand how Earth can be so old and still have a hot interior? (1 point) A.Radioactive elements trap heat from underground magma chambers. B.Radioactive elements absorb heat from the atmosphere and release it underground.*** C....

Science
Marie and Pierre Curie noticed burns on their fingers after handling test tubes containing radioactive substances. This observation led to (1 point) A.the discovery of natural fluorescence. B.the discovery of X-rays. C.the discovery of radiation therapy.*** D.the discovery of ...

Science
Henri Becquerel expected to see only weak images on the photographic plate containing the uranium salt because he thought (1 point) A.fluorescent minerals needed direct sunlight to produce radio waves. B.fluorescent minerals needed direct sunlight to produce X-rays.*** C....

Science
What is the principle role of a tower within a cellular system? (1 point) A.to track data usage*** B.to transmit signals C.to pinpoint locations D.to reduce line noise

Science
9. FM signals travel as changes in (1 point) A.the speed of the wave. B.the amplitude of the wave. C.the frequency of the wave.*** D.the loudness of the wave.

Science
8. Which of the following is true about all electromagnetic waves in a vacuum? (1 point) A.They all carry the same energy. B.They all travel at the same speed. C.They all have the same frequency. D.The all have the same wavelength.***

Science
7. Which of the following correctly describes a gamma ray? (1 point) A.long wavelength and low frequency B.long wavelength and high frequency C.short wavelength and low frequency D.short wavelength and high frequency***

Science
6. Sonar is used to inspect pipelines and bridge foundations. In this scenario, sonar takes advantage of the fact that (1 point) A.sound waves can reflect.*** B.sound waves can diffract. C.sound waves can spread out. D.sound waves can refract.

Science
5. The pitch of the siren of a moving fire truck changes from high to low as the fire truck passes by. What property of a sound wave changes as the fire truck goes by? (1 point) A.amplitude B.density C.temperature D. frequency***

Science
3. When the energy of a sound wave is transferred to a particle of a medium and causes it to vibrate and generate heat, the sound wave is (1 point) A.reflected. B.refracted. C.absorbed.*** D. Transmitted.

Science
2. Soundproof rooms take advantage of which property of waves? (1 point) A.absorption*** B.regular reflection C.Refraction D.diffuse reflection

Science
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength*** D.amplitude and frequency

science
Pepsin,which speeds up the breakdown of protein,is classified as

Science- urgent-review
what type of galaxy do astronomers consider to be the oldest? It's urgent because I am studying for a grade 9 exam but I don't know what this is.. please help.

blood/science
how are blood types determined? A. marker mocules marked on red blood cells B. Marker mocules marked on white blood cells C. Plasma fibrin's precense D. Blood available for transfusion

science
What is the blood type of a person whose plasma contains only anti-B clumping proteins? Is it blood type A?

Science
A certain species of grasshopper can have red stripes, yellow stripes, or red and yellow stripes. An RR grasshopper has red stripes, an YY grasshopper has yellow stripes, and an RY grasshopper has red and yellow stripes. Which type of inheritance is this an example of? ...

maths lit,business studies,life science economics
what can i study for or what career field i should follow?

maths lit,business studies,life science economics
what i can study after matric?what career field i should follow?

Science
A motor car of mass 800kg traveling at 20m/s brought to rest by break over 100m calculate the average breaking force required

Science
A sample of steam with a mass of 0.530g and at a temperature of 100 ∘C condenses into an insulated container holding 4.40g of water at 5.0∘C.( ΔH∘vap=40.7 kJ/mol, Cwater=4.18 J/g⋅∘C). What is the final temperature of the mixture, assuming no ...

SCIENCE
IF THERE WAS A ZERO CHANGE IN EARTHS ECCENTRICTY, HOW MIGHT THAT AFFECT THE POSSIBILTY OF AN ICE AGE/

science
A soccer player applies an average force of 180 N during a kick. The kick accelerates a 0.45 kg soccer ball from rest to a speed of 18 m/s. What is the impulse imparted to the ball? What is the collision time?

Science
3. Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods NEED ANSWER FOR PRINCESS ANNA!!! She posted this ...

Earth Science
4.   Which statement best describes an igneous intrusion?       A. Magma is injected into surrounding rock forming an igneous intrusion.  B. Magma explodes to the surface and forms a smooth outer layer of rock.  C. Magma is exported to an open area and forms ...

Earth Science
1.   What measurement best describes the results of a scientific experiment regarding distance?  A. 57 miles B. 500 kilograms C. 523 inches D. 51 kilometers      My answer is D. Am I correct?   

Science
In the experiment water clock : what changes (independent variable) , how does it responds to the changes made(dependent variable), and what is being controlled (controlled variable). Pleas I really need this by today. And also my question for science fair is what part does ...

Earth Science - Please Check My Answer
Please help me with the following question: Please select the word from the list that best fits the definition Creates clouds, snow, sleet, rain and hail A. Radiation B. Conduction C. Convection D. Water Cycle I think the answer is mostly B, but I think it could be D as well. ...

SCIENCE
1. An environmental engineer might (1 point) Create mathematical models of what may happen to global temperatures in the future. Build and maintain a marine exhibit for an aquarium. Help an oil finery reduce its toxic gas emissions.*** Stock a lake with algae-eating fish. 2. ...

physical science
a diagram to show the maximum and minimum resultants

Science
Is "how did our planet form" a scientific question?

Science
How does cell differentiation connect to other branches of science or STEAM (science, technology, engineering, art, mathematics)

SCIENCE
1. An environmental engineer might (1 point) Create mathematical models of what may happen to global temperatures in the future. Build and maintain a marine exhibit for an aquarium. Help an oil finery reduce its toxic gas emissions. Stock a lake with algae-eating fish. Is it A...

Gen Science 2
lightning is actually an enormous display of the concept of? A) chemical heating B) solar energy C) magnetism D) groundind

science
How many litres of oxygen are needed to react completely with 25.0L of H2S at STP according to the following reaction: 2H2S + 3o2 --> 2so2 + 2H2O At STP temperature is 273 K pressure is 101.3 Kpa R is 8.314 so PV=nRT 101.3×25= n× 8.314× 273 n= 1.11 so using the molar ...

Science
How could genetic engineering of plants be useful to people? Give examples

Science
DNA can perhaps best be compared to a(n) A. secret code or B. electrical circuit

Science
What are the different evidences used to support the continental drift theory? Give at least four and provide examples for each.

Science, Chemistry
2) Find the temperature at which air posses a density equal to that of hydrogen at 0°C. Density of air at STP is 14.4. Ans: 3658.2 °C.

SCIENCE
An arrow is fired vertically up lands 8 seconds later.Find: [ A] Its maximum height. [B] Its initial speed.

Science/engineering
What part does gravity play in the function of the water clock? Explain.

Physical Science
how do i find the number of molecules in a packet of sweetners (splenda, equal, sweet & low).

Physical science
Is a chemical reaction the same as a chemical change i need to know so that i can plug it in to answer a question

science
explain an animal cell in your own words and two things each part does

science
when will the resultant of the two vectors be at a maximum

Life science,history,geography,math literacy
Is it possible to become a law while you are doing those subject

Science
guys, please give me any ideas for a investigatory project in physics ???

Science
Please help me to solve this equation. Than you for your time and efforts. Here is the question? Jupiter at its closest approach to earth is about 630,000,000 kilometers, the diameter of Jupiter is 140,000 km, calculate the angular diameter of Jupiter in arc seconds. 206,265 ...

science
Which constellations are visible from Canada in all seasons?

science
please draw an atomic diagram showing electrons in different energy levels LI + N = MG + F = NA + F = AL + O = LI + O = K + S = MG + O =

Physical science
Two forces of 5N and 7N respectively act on an object. When. will the resultant of the two vectors be at a maximum?

physical science
two force of 5n and 7n respectively act an object , when will the resultant of the two vectors be at a maximum

Math literacy,physical science,CAT,life science
Can I still be a doctor without pure Maths?

Psychology
If science depends on observation of empirical data, how can social scientists study nonobservable phenomena, such as thought patterns or imagery?

statistics
In a class of 100 students, 30 are computer science majors, 49 are mechaincal engineering majors, 13 are civil engineers and the rest are general engineering majors. Assume students only have one major. If a student is chosen at random what is the probability they are: a civil...

Science
The rock cycle suggests that A)rocks are always added to Earth's mass. B)rocks are continuously being recycled into different forms. C)rocks disappear from Earth as they go underground. D)rocks always stay in the same form. My answer is A... is that right??

Science
A ball slowing down as it rolls across a carpet is an example of A. Balances force. B. Friction C. Interia D. Zero net force Is the answer B? Thank you

Science
A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. True False Is the answer False? Thank you

science
Which cells identify as the ones most likely to hold the key to increased human longevity and vitality and how might this work? Describe one alternative to cloning

science
What are some arguments against extending human life? Please describe at least one objection and one objection from your research and experience.

SCIENCE
From the following data ,calculate the percentage of KCl in sample of chloride weight of the sample 0.1865, volume of AgNOS required 26.50mL and Ag of AgNO3 =0.008700gram

science
a box weighs 200 N. If you push on the box with a force of 15 N and the box does not move, how much work did you do? A) 0 J B) 15 J C) 15 N or D) 3000J

Science (Chemistry)
Identify the manipulated and responding variables in this testable question: "Does orange juice transform from a solid to a gas at the same exact rate as water?" My question is, what will you be changing in this lab (MV) and what are you measuring (RV)?

5th grade science
How might the history of the United states be different if the first European settlements had occurred on the west coast instead of the east coast

science
sound travels in theses from its source

science fifthgrade
FORCE AND MOTION. wHAT GOES INTO DESIGNING Vehicle? can u tell me any science sites

math/science
the melting point of the element bromine is about 19 grades F this is about 57 grades F more than the melting point of mercury. What is the melting point of mercury?

how concepts develop
Which of the following is the crux of the interrelationship between mathematics and science? A. About half of the basic math concepts are related to science concepts. B. The basic concepts of mathematics are the basic process skills of science. C. Basic mathematics process ...

Science
What is the genetic code? A. The order of amino acids in proteins makes up the genetic code. B. The order of amino acids in mRNA makes up the genetic code. C. The order of nitrogen bases in tRNA makes up the genetic code. D. The order of nitrogen bases in DNA makes up the ...

science
How might the history of the US be different if the first European settlements had occurred on the west coast instead of the east coast

Science
How many atoms are in LiBr2 show in the reaction side? LiCl (22g) + Br2 (30g)

Science HELP!!!
What happens after genes are injected into an organism?

science
Fertilizers and pesticides applied to farm fields in Pennsylvania have made their way to Chesapeake Bay Maryland, this is an example of _____________ pollution.

science 1 question
Explain how a scientist would use DNA or protein sequences taken from three different organisms to construct a cladogram. I know what a cladogram is but I have no clue about the DNA or protien thing. Anything would be helpful. Please help! Thanks.

physical science
Determine the resultant of the forces using an accurate tail-to-head vcector diagram. Use a scale of 10mm:1N

Science
Which of the following is not a characteristic of igneous rocks? Igneous rocks are formed when molten rock cools and hardens. Igneous rocks have crystal grains. Igneous rocks are larger in size because the rock cooled more slowly after the hot lava came out from the ground. ...

physical science
Force1 of 3,5N acts on an object to the right and force2 of 4,5N acts on the object towards the left. Determine the resultant of the forces using an accurate tail-to-head vector diagram,use the scale 10mm:1N

Science
When (blank) forces act on an object, they cause the object to move. A. Balanced B. Unbalanced C. Friction D. Net Is the answer B?

5th science help
Convert 3.8 m/s to km/h I got 13.68 but I got it wrong, can someone help me know why?

mathematics,science,physics,agriculture and geograph.
which work i surpose to do?caus geograph confuse me!

Science HELP!!!
What happens after genes are injected into an organism?

Science Ms. Sue?
Why did the following change occur? The snow that covered the ground all winter began to melt, temperatures rose, and flowers started to bloom. A. days became shorter B. the Earth tilted away from the sun C. the sun's rays became more concentrated D. Earth completed one ...

SCIENCE
ALuminum can be determined gravimetricaly by the reaction with solution of 8-hydroxyquinoline (C9H7NO3).The net ionic equation . A mass of 0.1248g of Al(C9H6NO)3 WAS obtained by precipitating all of the the Al3+ from a solution prepared by dissolving 1.8571g of a mineral. what...

science
How much latent heat is needed to completely melt 368 gram ice cube?

Science
What genetic changes would you make to your food

science
what is the concentration of a solution made by mixing 22.0 g of salt with 200 mL of water? assume that the volume of the water does not change when the salt is added

science
I grand daughter has this fill in the blank: Electically__________ objects push or _____________ on other electrically charged objects. This produces___________. Please fill in the blanks please. Because we don't know... Thanks!!!!

science Help
How did the discovery of the electron change the atomic model? A.it disaproved the earlier idea of an indivisible atom. B.it confirm that atom are very tiny. C. It exposed fraudulent experiments conducted by unqualified scientists. D. It proved that atom are easier to see than...

Science
I need to know how much of a 2g sample of Technetium-99 would be left after 12 hours. The half life of Technetium-99 is 6 hours

Science
According to the fossil record shown, how did the Bighorn Basin environment change from 55.85 to 55.75 million years ago? Highlight the correct answer choice. (1 point) A. Over time, less plant life covered the basin. B. Over time, more plant life covered the basin. C. Over ...

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