Science

Recent Questions

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 ...

Science
Hey I need help with my science paper I have to write a page or two on birth defects but I don't know any birth defects.

Science
A cat is walking down a sidewalk and spots a dog in a nearby yard. The cat starts to run in the opposit direction and then quickly climbs a tree. Which of the following changes most accurately describes the movement of the cat? A. Change in speed B. Cange in distance C. Change...

Science
1.A model train traveling at a constant speed around a circular trak has a constant velocity. True False**** 2.Which of the following would be affected if a soaring eagle changes direction but remained at a constant speed? A. Acceleration only B. Velocity only**** C. ...

science
One way the modern atomic model differs from Thomson’s atomic model is that electrons are no longer scattered throughout an atom’s positive matter like chocolate chips in cookie dough. Instead, each electron is outside of the nucleus occupying a specific... If new info ...

Science
I am really having a hard time completing this question.. Punctuated equilibrium occurs over a relatively ______ period of time, usually as a result of a ________.

physica science
when will the resultant of the two vectors be at maximum when two forces of 5n and 7n act on an object?

Science
Why are phosphates rocks useful?

Science
how is radiation different from convection and conduction? Radiation can travel through solids is what i'm thinking.

science
What is Eugenics and what were the goals and policies of the American Eugenics movement?

science
In the past, what makes someone or a group of people considered to be "unfit" members of society?

Science
Describe genetic engineering on a cellular level. In other words, what exactly takes place during genetic engineering that inserts a trait into an organism that did not have that trait before? Give an example

Science
In the past, what makes someone or a group of people considered to be "unfit" members of society?

science
which statement is true about the following molecule

science
homozygous line of normal-hearing dogs was crossed with a homozygous line of deaf dogs. F1 and F2 generations were produced. What percent of F1 generation is expected to have normal hearing? What is a phenoeyeic ratio of the F2 generation?

Science
a common recessive trait in dogs is deafness. homozygous line of normal-hearing dogs was crossed with a homozygous line of deaf dogs. F1 and F2 generations were produced. What % of F1 generation is expected to have normal hearing? What is a phenoeyeic ratio of the F2 generation?

Math
It takes Jaiden 5 and 3/4 hours to do her homework each week. It takes her 2 and 3/4 hours to complete her science and 1 and 1/2 hours to complete her math homework. How long does it take her to complete Social Studies homework? Use the numbers and symbols, listed below, to ...

science
Which systems move the human body? I heard there were the skeletal, nervous, and muscular system. ??

Science
If I push a book 1.5 m across the table using a constant for of 10 N, how much work do I do on the book?

Science
2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? A. An airplane flying acroos the sky. B. A car traveling next to you at the same speed you are traveling. C. A car traveling next to you at a faster speed than ...

science
Can you explain to me what happens to the energy when you do work? thanks

Science
Kilometers per hour describes the speed of an object. True False Is the answer True? Thank you

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