Science

Recent Questions

math lit, geography, life science,business studies
hey there! what career can do with math lit, geography, life science and business studies?

Science
According to Newton's third law of motion, if a rolling ball collides with a wall and exerts a force of 3 N on that wall, how much force does the wall exert back on the ball? A. 0 N B. 3 N C. 6 N D. 9 N Is the answer b?

Science
Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s? A. A 71 kg lion running at 10 m/s. B. A 45 kg zebra running at 13 m/s. C. A 5,000 kg elephant walking at 1 m/s. D. A 61 kg zebra running at 8.0 m/s. Is the answer C? Thank you

Science
Jellyfish sometimes squeeze the sides of their bodies. This pushes a stream of water from the back end of their bodies. According to Newton's third law of motion, how will this behavior affect the movement of the jellyfish? A. The jellyfish will move forward. B. The inertia of...

Science Project on African Elephant
What are the physical and behavioural adaptations of an african elephant with the danger and extinction of the african elephants????

Science
Which of the following describes the relationship between friction and inertia? When there is more friction, there is less inertia. When there is less friction, there is more inertia. When there is more friction, there is more inertia. When there is no friction, there is more ...

Science
long wings are dominant to short wings in fruit flies. make a punnett square to show the predicted outcome of a cross between two parents that have both alleles for wing length. what is the ratio of flies produced?

Science
What is the momentum of a 20.0 kg scooter traveling at 5.0 m/s? A. 4.00 kg m/s B. 20.0 kg m/s C. 25.0 kg m/s D. 100 kg m/s Is the answer D? Thank you

Science Fair Project
Please help any tutors around, i really need help on what topic to choose, and my science fair is in February 16, 2015!!!!!! I just want to get a really good mark so i get an A in Science again this year in my report card. From a Student in need!!!Wimbika

Science
Suppose the total momentum of two masses before a collision is 100 kg m/s. What is the total momentum of the two masses after they collide? A. 0 kg m/s B. 50 kg m/s C. 100 kg m/s D. 200 kg m/s Is the answer D? Thank you

Physical Science
Identify these functions galvanometer step-up transformer electric motor generator electromagnet step-down transformer commutator

science subject
write the structural formula of 2-methylpropane.2,2-dimethylpropane.1,2-​dichloroethane.2-chloro-3-methylpentane.​2-chloro-2-iodopropane.3,4,4-trimethyl-5​-proplynon-2-ene.

science 1 question
In which way does the circulatory system rely on the skeletal system? A. Glucose is secreted by compact bone as an energy source for blood. B. Spongy bone stores minerals needed by blood cells. C. Bones provide a source of oxygen to blood. D. Blood cells are produced in bone ...

Earth Science
1.   What term is used to describe the process by which agents are carried from one place to another because of erosion?  A. Disposition B. Deposition C. Reposition D. Transplantation B?

Science
Two forces of 5N and 12N respectivley act on the same point. Show how you would determine the Magnitude of the resultant by using the Tail to head and Tail ti Tail methods and pythagoras theoram (13N)

Computers
1. What does the term "fair-use exception" mean? (1 point) to use only material that has never been published the ability to use material made by others for educational purposes an exception to copyright restrictions for images only Educational material is no longer under ...

science
Define buoyancy.state the factors on which buoyant force depends?

science
Give five reasons to prove that labio rohita (rohu) is a chordate.

science
'classification of life forms is closely related to their evolution'.justify this statment with the help of examples.

science
With the help of a labeled diagram describe in brief the rutherford's alpha particle scattering experment. Write three important conclusions drawn frm the expirment.

science
In a water tank,on throwing a stone 20 full ripples are produced in 1 sec.the distance a crest and a through is 10 cm.calculate: (a) the wavelength of ripple (b) frequncy of ripple (c) velocity of the ripples.

science
Define the following and give sl unit each: (a) power (b) work done (c) kinetic energy

science
Shubham lives in avillage,where drinking water facilites are very limited.they collect drinking water from a pond people also bathe and wash their clothes in that pond.he observed the most of the people are suffering from diarrhoea he advised people to use chlorine tablets in ...

science
In a chemical reaction,10.g of sodium carbonate reacted with 12 g of ethanoic acid.the poducts were 4.4g carbon dioxide,1.8g of water and 16.4g of sodium ethanoate. (a) write a word equation ,clearly showing the reactants and products as given above. (b) also show that this ...

science
Istopes are useful in many ways.write any three applications of istopes in various fields.

science
Number of electrons in the outermost m shell of an element is 3.find its atomic number.

science
A sample of certain mass of a gas was collected and it was found that the number of atoms and the nuber of molecules in the collected sample are equal.find this observation infer the type of molecules of the gas.

science
A sample of certain mass of a gas was collected and it was fond that the number of atoms and the number of molecules in the collected sample are equal.from this observation infer the type of molecules of gas.

science
A solid of relative density 1.25 is found to weigh 12 g in water.find its weight in air.

science
Using your reaction time, estimate the diestance a car would travel at 20m/s (45 mi/h) before you could apply the brakes. To get the deistance in meters you multiply the speed in m/s by your reaction time in seconds

science
is it possible for an object's weight to change while it's mass remains constant?

physical science
What amount of iron may react with 36gm of water vapour?

Science
Which of the following are structures that rely on capillaries for exchange or movement of small molecules? A. teeth, aorta, ureter B. cartilage, epidermis, larynx C. nephron, villi, alveoli D. leukocytes, atrium, bronchi Which of the following are structures that rely on ...

Science
1. Suppose a patient comes in to see a physician. This patient lacks the ability to keep warm and needs to wear heavy clothing even during mild temperatures. Which system of this patient’s body should the physician be concerned about? A. integumentary B. Skeletal C. ...

science
What part of a nerve cell receive the nerve impulse? Dendrite, Synapse or the Axon?

science 7th
A piece of copper is 1 meter long and has a density of 8.8g. If you cut the wire exactly in half, what is the density of one of the pieces

science
When a nerve impulse reaches a synapse, a nerve cell transfers the impulse to the next nerve cell by releasing D.electric currents. C.chemicals B.heat. A.pressure. Is it D?

Science
The current population in the United States is 318,968,000. The rate is .72. What will the population be in the United States in 10 years? Show work please.

Physical Science
Henry Heavyweight weighs 1200N and stands on a pair of bathroom scales so that one scale reads twice as much as the other. What are the scale reading?

science
Which statement is true regarding nuclear energy? (Points : 1) Nuclear power produces no greenhouse gasses and thus poses no environmental threats. Nuclear plants rely on a massive industrial infrastructure using fossil fuels. Due to strict safety regulations, nuclear power ...

Science
Two cannons are set up next to each other. Cannon A is set to fire at an angle of 50 degrees and B at 40 degrees. Prove that the range will be the same for both cannons.

science
A mixture of sugar and water can be separated by ______________. Choose ALL that apply. (2 points) Box 1. using a magnet Box 2. boiling the mixture Box 3. evaporating the mixture Box 4. using a filter I picked "Box 2" and "Box 3"

Science
A Block rests on a horizontal surface.The normal force is 20 N.The coefficient of static friction between the block and the surface is 0,40 and the coefficient of dynamic friction is 0,20. What Is the magnitude of the frictional force exerted on the block while the block is at...

Science
A swimmer that pushes the water back with feet and arms What will happen to the movement of the swimmer as they push the water back?

science
Which of the following represents a heterogeneous mixture? A.saltwater B.air C.bleach and water D.chicken noodle soup I think the answer is D. Chicken noodle soup. I don't know exactly.

Science
A swimmer that pushes the water back with feet and arms 1. What will happen to the movement of the swimmer as they push the water back? 2. If the swimmer exerts 5 n of force on the water how much force does the water exert back on swimmer? Please help

Science
Which of the following is true about producers? A.They are helpful to some ecosystems and not essential to any ecosystems. B.They are helpful to all ecosystems but not essential to any ecosystems. C.They are essential to some ecosystems D.They are essential to all ecosystems

Science
What physical features are caused by plate tectonics?

Science
Explain a metal power/laundry line which hang droop on a very warm day

science
an arrow is fired directly horizontal off a cliff that is 10.0 meters tall with a velocity of 65.5 m/san arrow is fired directly horizontal off a cliff that is 10.0 meters tall with a velocity of 65.5 m/s. How long is the arrow in the air?

life science,geography,maths litracy,tourism
What job will i do if i am doing the above subject

Science
When a truck and a small car both traveling at 50 miles/ hour collide with each other 1. which vehicle has more momentum before the collision and why? 2. Which vehicle will be more effected by the collision and why? 3. Which vehicle will have more momentum after the collision...

Science
Please help A swimmer that pushes the water back with feet and arms What will happen to the movement of the swimmer as they push the water back? If the swimmer exerts 5 n of force on the water how much force does the water exert back on swimmer?

Science
A swimmer that pushes the water back with feet and arms what is the reaction force? What is the action force?

Science
How is mass and inertia alike

Science
A swimmer that pushes the water back with feet and arms what is the reaction force? What is the action force? What will happen to the movement of the swimmer as they push the water back? If the swimmer exerts 5 n of force on the water how much force does the water exert back ...

Science
How are mass and inertia related? How do you calculate momentum? Please help

Science
Hello please help me with another question! - One fruit fly is heterozygous for long wings, and another fruit fly is homozygous for short wings. Long wings are dominant to short wings. Using a punnett square, find out what percent of the offspring are expected to have short ...

Science
suppose a male mouse is Bb and a female is bb. What percent of the mice offspring from these two mice would you expect to have black fur?

science
Calculate the molarity of a solution which contains 6.456g of Na2CO3 dissolved in 250.0 ml of solution.

science
On a frictionless air track, cart A hits cart B moving at a velocity of 2 miles per second to the right. Which answer predicts what will happen?

Political Science
In Gibbons v. Ogden, the Supreme Court held that?

Political Science
If the Supreme Court were to rule that gay marriage is a fundamental right, under the Equal Protection Clause of the Fourteenth Amendment, that would mean?

Political Science
In Marbury v. Madison, the Supreme Court established the principle of constitutional review by? I am seconding guessing myself on my answer so can you point me the right direction is it: claiming that Section 13 of the 1789 Judiciary Act providing that the Supreme Court will ...

Mixture science help
Which type of mixture has the largest particles? Explain how you know.

Political Science
In Gibbons v. Ogden, the Supreme Court held that? In Chapter 7 Federal Authority and the Limits to State Authority. If I am understanding right that the 10th Amendment trumps the Interstate Commerce Clause. I am I right?

science
An astronaut visits a moon of Saturn, and decides to measure the accel. of gravity. He ties a rock (m=2 kg) to a rope (1.25 m), pulls the rock back 10 degrees, and releases it into simple harmonic motion. What is the accel due to gravity on the moon? I have no idea where to ...

8th grade Science please help
Why is soda in an unopened bottle a homogenous mixture?

fundamental concept and skills
Which approach to literacy best connects mathematics and science to the real world? A. Balanced reading B. Phonics C. Whole language D. Structured reading c.

science answer fast please!
Could a molecule contain only one atom? Explain your answer.

science
Why is graphite considered an element?

Science
jellyfish sometime squeeze in the size of their bodies. this pushes a stream of water from the back end of their bodies. according to newtons third law of motion, how will this behavior affect the movement of the jellyfish? a. The jellyfish will move forward b. The inertia of ...

Pure math,Life science,Geography and History
Hi I'm grade10 and I was wondering if you's could help Me to get a career examples after matric because my school took away our Physics for unknown reasons so insted of Physics or another subject that would help you in the future they gave us History please help me with a ...

Natural science
What is vegetative reproduction?

Science
What is the central theme of the “As Cheap as Coal” portion in Section 8.1 of your text? (Points : 1)

Science
geologist finds fossils of a lizard-like dinosaur and a fern-like tree in layers that are 1.0 m and 1.5 m deep. However, in a layer that is 2.0 m deep, he finds fossils of bony fish and shellfish. Which explains? 1. The continent shifted to a polar region. 2. The ancient land...

Science
which conditions characterize a high-pressure area? 1. low density, low humidity 2. high density, high humidity 3. high density, low humidity** 4. low density, high humidity

Science
Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between t he Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.?

environmental science
Its a request:(answer sincerely and think like you're in a pageant) If you were crowned tonight, what can you contribute to heal the wounds of Mother Nature?

Science
In humans, the allele for curly hair and the allele for straight hair show incomplete dominance. The offspring of a curly-haired person and a straight-haired person will have... I think it is curly and straight hair. Help please ?

Science
How can an offspring inherit a recessive trait ? Is it when both parents carry that trait? In the plant shown (plant is an orchid with equal numbers of small white and purple specs on each petal) , the allele for the purple flower color is most likely: Dominant, recessive, ...

environmental science
This is a request: Can you share your opinion about drought and what can you do about it?

Science
What factors will be important in deciding the future use of energy resources?

science
Explain how the chemical compounds that were once in a piece of granite exposed on the top of a mountain may today be found in a piece of basalt.

Mowat Park High School
History, geography, life science and math litrecy what career choice do or career field do I go to with these subjects

science
what is the central theme of the "As Cheap as Coal" portion in Section 8.1 of your text?

Science:Physics
Nilo drives is van with an average velocity of 45.0 km/h along the North Expressway. How long will it take him to drive 350 km on a perfectly straight highway

Science
2. why is gas able to flow? a) Its particles have melted and can move around b) Its particles have high viscosity and can move around c) Its particles have enough energy to move around d) Its particles have enough pressure to move around 3. Which of the following is true about...

7th grade science
Can you help me with genetics questions? Directions: In each set, tell which word does not fit with the others. Then explain why you think it does not. You must mention all words. 1. Aa, Heterozygous, Hybrid, Homozygous Ans: Homozygous doesn't belong because letters are mixed...

Science
Which type of climate receives the most intense solar energy? A. grasslands climate B. tropical climate** C. polar climate D. temperate climate

Science
In terms of density and humidity, which conditions characterize a high-pressure area? A. low density, low humidity B. high density, high humidity C. high density, low humidity** D. low density, high humidity

Science
Which type of weather is most likely produced by a cold front? A. light to moderate precipitation B. moderate to heavy precipitation C. no precipitation** D. heavy precipitation and thunderstorms

Science
A geologist finds a layer of rock that is made of medium-grained sands and is porous. What type of rock did the geologist find? A. sandstone** B. conglomerate C. coquina D. limestone

Science
How would a geologist identify an igneous rock as intrusive? A. An intrusive rock has coarse grains because it cooled more slowly on the surface of the earth. B. An intrusive rock has coarse grains because it cooled more slowly beneath the surface of the earth.** C. An ...

Science
How do plants produce chemical weathering? A. They secrete carbon dioxide that combines with water on the rocks and dissolves the minerals in the rocks. B. They secrete chemicals that freeze the water within the cracks of the rocks and break down the rocks. C. They secrete ...

Science
Which explains how climate data were used as evidence to develop the theory of continental drift? A. Similar glacial deposits and sediments were found on areas of the same continent that are now thousands of miles apart. B. Different glacial deposits and sediments were found ...

Science
Earthquakes occur on the earth today, so we can assume they occurred in the past. Which important geologic principle does this sentence support? A. original horizontality B. faunal succession C. superposition D. uniformitarianism**

Science
According to the theory of plate tectonics, how do two plates interact to form coastal volcanic ranges? A. A continental plate slides along an oceanic plate at a convergent boundary. B. A continental plate collides with another continental plate at a convergent boundary. C. An...

Science
A mineral breaks into flat sheets when struck with a rock hammer. Which property of a mineral is being measured? A. hardness B. cleavage** C. streak D. color

Science
Which explains the greenhouse effect? A. Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back into space. B. Greenhouse gases like water vapor and carbon dioxide release heat in the atmosphere, thereby radiating ...

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