Science

Recent Questions

history,geography,life science,maths literacy
what are the admission repuirement for traffic?

history,geography,life science,maths literacy
what is the description of the traffic

history,geography,life science,maths literacy
provide two reasons why you find this a suitable course for each choice

science
how can I prepare 5 micromolar solution of Fe(NO3)3.9H2O? plz guide me as soon as possible

science
A piece of metal has a mass of 120 grams.if its volume is 8 cm3.what is its density?

Science
a ball is rolled off the edge of a dining table 1.5 m high with a horizontal velocity of 2.2 m/s with what velocity does it strike the ground? How far from the edge of the table did it land on the floor?

Science
The height of the tropopause increases near the equator. What does this say about the thickness of the atmosphere?

Science
The ratio of Secondary Turns to Primary In a Transformer is 3 if the EMF In the Secondary Coil Is 600Volts Find The EMF Of Primary

science
how does high speed space travel affect time?

science
what is the scientific name of the big dipper?

science
Ammonium nitrate breaks down into Dinitrogen monoxide and dihydrogen monoxide

Science Please Help!
Some constellations, such as Ursa Minor, are visible in the sky year-round; other constellations appear for only part of the year. Explain why this happens. I've been trying to figure it out but I can't please help me!

Science
Which reaction is exothermic? A. Cellular respiration B. Photosynthesis C. Baking soda + vinegar D. Melting Ice***

Science!
1) Which of the following is true about photosynthesis? A. it is an exothermic reaction B. it is an endothermic reaction C. It produces carbon dioxide D. it occurs in animals I think it's A.

science
What dose a wildlife corridor help prevent? 1. habitat fragmentation 2.habitat loss 3.habitat competition 4.habitat creation I choose (2) is this correct?

Science
a fireman 50 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 30 degrees above the horizontal. If the speed of the stream is 40m/s , at what height will the stream of water strike the building?

Science
About what percent of all of Earth's fresh water is found in ground water, streams, lakes, and rivers?

maths and science
Three courses or study field you are interested in following after grade 12 and provide three reasons

science
Ann is driving down a street at 50 km/h. suddenly a child runs into the street. if it takes ann .75 seconds to react and apply the brakes. how many meters will ann have moved before she begins to slow down? If she slows down at a rate of 1.5m/s^2, how long will it take her to ...

life science ,cat,maths lit and english
What can i become with maths lit ,cat,life science and geography

Science
4.)When two or more atoms of the same of the same element are in a chemical bond, the substance is called a(n)________ A.)Compound B.)Molecule C.)Nucleus D.)Particle*** Am I'm correct? BUT My mom disagree's and says C?, isn't she wrong?

Science
2.)Which of the following are pure substances? A.)Chocolate Milk B.)Orange Juice C.)Sea Water*** D.)Hydrogen Peroxide (H2O2) C?

science
A cylinder contains a moles of hydrogen at 0 degree celsius and 76cmHg.calculate the amount of heat require to raise the temperature of hudrogen to 50 degree celcius.keeping the pressure constant and what is the volume of hydrogen when at 0 degree celsius.

Science
Physics question -A driver of a car travelling at 72km/h, applying brakes and accelerates uniformly in opposite direction at the rate of 5m/s2. How long will the car take to come into rest ? How far will the car covered a distance after applying bra

science help
A scientific question should be vague creative non-testable non-repeating

science help
A scientific question should be vague creative non-testable non-repeating is it b

science help
A scientist uses a computer model to understand a widely accepted theory about Earth's surface. The computer model would most likely help the scientist to... A. reduce the intensity of earthquakes B. discover new facts about the theory C. stop the creation of faults during ...

science help
Four groups of students, in different parts of the world, are investigating the reason why the shape of the moon changes from time to time. If the results of their investigations are considered valid, they would most likely be A) complex B) identical C) non-testable D) ...

science help check
Which of these is an example of an experiment? plant growth is affected by temperature leaves may change color due to temperature add different quantities of water to three potted plants the plant which gets the most sunlight grows the fastest is it c

Science
Calculate the amount of heat required to completely convert 1kg of water at 0°C to the boiling point at 100°C?

science help
A scientist plans to find out the percent of teenagers who like science. She interviews 500 teenagers leaving a science museum and finds that 450 of them like science. The scientist concludes that 90 percent of teenagers like science. Why is the scientist's conclusion most ...

science help
Which of these questions can be answered through science? What is the best water sport? Why should we value honesty? Why does water change into steam? What is the most important thing in life? is it c

science
A cylinder contains a moles of hydrogen at 0 degree celsius and 76cmHg.calculate the amount of heat require to raise the temperature of hudrogen to 50 degree celcius.keeping the pressure constant and what is the volume of hydrogen when at 0 degree celsius.

science
P +HNO3 gives HPO3 + NO Balance the chemical equation by oxidation no. method

math literacy,life science ,history ,design
What career can I choose with these subjects

life science
Biological term for: the presence of definite upper and lower surfaces in animals

English
1. He is a social science teacher. 2. He is a SS teacher. 3. She is a home economics teacher. 4. She is a HE teacher. 5. She is a technical arts and homemaking teacher. 6. She is a TAH teacher. 7. She is a healthe education teacher. 8. She is a HE teacher. 9. He is a technical...

Science
A rope is used to host an object with a mass of 1,3 tons vertically through a distance of 100m. The mass of the rope is 2kg per metre. Determine: the work done.the average tension in the rope and the power used if it takes 2minutes to host the object.

Science
Why is UTC used for astronomical calculations?

science
what is the balanced product of Pb(NO3)2 + Li(SO4)?

science
What is the pH of a mixture of 5ml of 0.1mol/litre sodium acetate and 4ml of 0.1mol/litre acetic acid? pKa= 4.76.... What is the pH on adding 1ml of 0?1mol/litre HCl to the mixture abouc

Science
Mohan travels at 20m/s from home and returns back at 25m/s.Find his average velocity for the entire journey?

Science
Why are there so many different species on earth today?

English
Help, Please! I don't quite understand what is asking in this assignment (Essay) Task: Write an essay that compares Frankenstein and his creation to a modern zombie story with the focus on how a monster might be used as a metaphor for science or scientific advances and/or how ...

Science
A 2 N and 6 N force pull on an object to the right and a 4 N force pulls to the left a o 5 kg object. what is the net force on the object?

psych
What is the Importance of Research in Behavioral Science?

English
Help, Please! I don't quite understand what is asking in this assignment (Essay) Task: Write an essay that compares Frankenstein and his creation to a modern zombie story with the focus on how a monster might be used as a metaphor for science or scientific advances and/or how ...

physical science
a crate of cooldrinks with a mass of 15kg over a smooth horizontal surface by exerting a force of 80N at 30° to the horizontal. Draw a diagram and aswers the following 1. Draw a force diagram showing and labelling all the forces acting on the crate. 2. Calculate the vertical ...

Earth Science
Why are there so many different species on Earth today?

science
This type of auto-immune disease occurs when the immune system attacks the layer of insulation that surrounds the nerves and slows nerve impulses.

science
a 2,8kg trolley is moving to the right with a speed of 0,45m.s^-1. A 1.9kg brick is dropped from rest and lands on the trolley. the trolley and bRick move together across the horizontal surface. Assume an isolated system. determine the change in momentum of the trolley

science
In the diagram above, the arrows represent momentum. A larger arrow indicates more momentum. Which of the following best describes how the balls will move after ball A collides with ball B? (1 point) 1. Ball A will bounce off of ball B and roll to the left, and ball B will ...

science/bioligy
How would a scientist use DNA or protein sequences from three different organisms to construct a cladogram? need help!!! how do I do this??

science/biology (cladogram)
How would a scientist use DNA or protein sequences from three different organisms to construct a cladogram? don't understand this how do I write this???? help!!!!

engineering science
A solid cylinder rolls from rest down an incline 6m high without slipping. calculate the linear velocity at the foot of the plane

science
How can I prepare a acid with a specific concentration and volume. Example how can I prepare o.5M of HCl

6th Grade Science
In the ____ temperatures can increase up to 1,700˚C.

accelerated science
what is the energy level of visible light, infrared, and radio waves in joules?

science
Why is fresh water considered a limited resource?

Science
In pea plants, yellow seeds are dominant over green seeds. Round peas are dominant over wrinkled peas. Cross two pea plants that are heyerozygous for both traits.

Science
A plane flies 118 km at 15 degrees south of east and then flies 118 km at 35 degrees west of north. Find the magnitude and direction of the total displacement of the plane?

Physical science
a balloon has a volume of 0.5 L at 20 degrees celsius. what will the volume be if the balloon heated to 150 degrees celsius? assume constant pressure and mass. I got 0.7218 L.

SCIENCE PLZ HELP
when are tides in earths oceans the highest? during the moons waning gibbous phase during the moons waxing gibbous phase when the moon is at the right angle of the sun when the sun, Earth, and moon are in a line.

science
which term describes the main process in the water cycle

science
why is water a limited rescource

science
when whould electric current flow through a conductor

Science
If a cell undergoes mitosis every six hours, how many cells will there be in all after seven days?

Science
Expression for bernaulli theorem

science
Express the value of time in s.I units 2hours 35 seconds I tried multiplying but gave me wrong answers and objectives are 7200 3600 9300 2100

Science
What impact does storage of elastic energy have on the efficiency of hopping?

Science
There is generally more life found in the sunlit part of the ocean closer to the continents than there is in the open sea farther from the continents. Therefore, the open sea is sometimes called the blue dessert. Why is this? Thanks.

Science - Characteristics of the Ocean Floor
If you could drop Mt. Everest (height:8848m) to the bottom of an ocean trench, would its summit(top) reach the level of the ocean's abyssal plains? Why or why not? Thanks.

Science - Ms. Sue plz
Would you expect to find plant like organisms below 1,000 meters in the ocean? Why or why not? Thanks.

PHYSICAL SCIENCE
Imagine two billiard balls on a pool table. Ball A has a mass of 2 kilograms and ball B has a mass of 3 kilograms. The initial velocity of ball A is 9 meters per second to the right, and the initial velocity of the ball B is 6 meters per second to the left. The final velocity ...

Science
If you could drop Mt. Everest (height: 8848meters) to the bottom of an ocean trench, would its summit (top) reach the level of the ocean's abyssal plains? Please help me with this question. Thanks. :D

Science
I need an example or suggestion for a Controlled Experiment for a science presentation

Science
Are plant like organisms below 1,000 meters in the ocean? Thanks.

Science
A stone wirelesd at the rope 30cm long makes 10 complete revolution in 25 second

computer science
Assume a computer has the capacity to hold up to 4 memory modules, with each module containing 512M bytes. How many total bits are needed in the memory address?

science
950ml of a gas at pressure of 1.5atm is compressed to 473ml. what is the new pressure of the gas

science
freezing point of pure solvent remains constant whereas the freezing point of a solution continues to decrease with time

Science
Al+(Cr2O7)2- = Al3+ + Cr3+ [al3+]=0.01M [(cr2o7)2-]= 0.1M [cr3+]=0.001M find the E cell if we add Naoh to each electrode until al(oh)3 precipitates pH=8 KPT of al(oh)3=5 * 10 -33 Eal=-1.66 V Ecr=1.33V

general science
A car mass 500 kg accelerates 1m/s sqare the force due to eng is 600N the average frictional force is

Earth science
Why didn't the early geologic time scale include the number of years ago that events happened?

Science
The half-life of randon-222 is 8 days. What was the original mass if 6 grams remains after 24 days?

Physical Science
Suppose the jumbo jet of mass 30000 kg flies against an air resistance of 82000 N while the thrust of all four engines is 100000 N. Find the acceleration

Science
Actively dividing cells can be found in? meristems. xylem tissue. epidermal tissue. center of stems. phloem tissue. help

science
which kind of reproductive structure is not within the fungi? is it anthers

geography,life science, business and maths lit
What career can I use as an option after my matric??????

Earth Science
why didn't the early geologic time scale include the number of years ago that events happened?

science
why didn't the early geologic time scale include the number of years ago that events happened?

science
Iron is produced in a single displacement reaction with iron II cyanide and tin. How many grams of iron are produced when you use 1.98 g of tin?

Science
Why are sedimentary rocks more useful than metamorphic or igneous rocks in establishing the relative ages of rock?

Math
A science class planted a tree in the school courtyard that was 6 inches tall. It is growing 4 inches each week. Write a function rule for the height, h, of the tree based on the weeks, w, since it was planted. h = 6w + 4. h = 4w + 6. (MY ANSWER) h = 4w. h = 4w – 6.

science
3 Nitroglycerine is used as an explosive. The equation for the explosion reaction is: 4C3H5(NO3)3 ( l ) 12CO2 ( g) 1 10H2O ( l ) 1 6N2 ( g) 1 O2 ( g) a How many moles does the equation show for: i nitroglycerine? ii gas molecules produced? b How many moles of gas molecules are...

science
why echo is weaker than original sound

science
You burn 6 grams of carbon in plenty of air: C ( s) + O2 ( g) = CO2 ( g) a What volume of gas will form (at rtp)? b What volume of oxygen will be used up?

science
Why it is important to know the history of science in 300 words?

Science
Does anyone know the answer to this? 2.50mL Fe =? atoms Fe, Dfe =7.87 g/mL

science
why did a portion of the table top get cold when Natasha placed her cold drink on the table

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