Science

Recent Questions

Science
1. Massive amounts of destructive energy are released when a nuclear fission bomb explodes. Where does that energy come from? a) A chain reaction occurs when uranium atoms split, releasing nuclear energy. b) Molecules break down, releasing chemical energy. c) Hydrogen atoms ...

Science (chemistry)
If 1mile of methane(CH4) is releases 890 kJ/mole, how much energy is released per gram of methane?

science
1 evaluate the market failure in south Africa 2 base your argument on south african context and also outline its effects thereof 3 evaluate at least four types of market failure and also how the government should correct the market failure 4 use appropriate examples, pictures ...

science
a body is thrown upward with velocity v . the height at which P.E is one third of K.E is ? answer is in terms of v

Science
If too much of an unsaturated fat is added to bromine water, could this affect decolourisation of bromine water? All help is appreciated... > C >

Science
The moon is about 384000 km the earth and its paths around earth is circular. The moon taken 24hr to complete one orbit. The speed at which the moon orbits the earth in km/ hour is

Science
Calculate the density of a 45g nickel weight and a volume of 22 cubic centimeters.

Advance Math,Science
The solubility of sodium chloride is 35.4g of water at room temperature. What mass of sodium chloride can be dissolved in 1kg of water at room temperature?

Science
What happens to your speed velocity and acceleration as you run circular laps?

SCIENCE
A BOX HAS A BASE SURFACE AREA OF25cm2 AND THE WEIGHT OF 100N.CALCULATE THE PRESSURE IT EXERTS ON THE GROUND.

science
Write a structural program to calculate the average of 10 students in 3 courses. Hint score < 40 fail

science
give five application of Doppler effects

Life science, Life science and History
I want to be a doctor (immunologist) I'm not sure about the last subject should it be history or Geography

Science
A density bottle weigh 0.25and0.75 when filled with water and 0.65N when filled with alcohol . Calculate the volume of water and alcohol

Science
What eletromagnet wave not used for coumintcation plz help

science
write a formula for this compound potassium nitrate

science
Calculate the kinetic energy in joules of a body of mass 30kg at a velocity of 3ms-1

science
Which kind of energy transformation occurs when a skater's board falls back to the ramp?

comprehension science
how can a cyclist minimize friction as he or she rides?

science
what is the length of a simple pendulum that has a period of 2.8 seconds (g=10)

Science-Physics
As shown below, a 2.00 kg mass is connected to an unknown mass m via a massless rope and a massless, frictionless pulley. The mass m is on a ramp angled 20 degrees above the horizontal. The coefficients of kinetic and static friction are μk=0.35 and μs=0.45, ...

science 4th grade
What is the property of matter that keeps a moving object in a straight line called

Science
If 100 mL of hydrogen peroxide decomposes how many liters of O2 is formed

Science
The human egg cell above is magnified using a 10´ ocular lens and a 40´ high power objective lens. (a) Calculate the overall magnification. (b) If the field of view at high-power magnification is 400 mm, calculate the size of the field of view when the magnification is ...

6th Grade Science - Connections Academy
Why is it important to understand how an ecosystem is organized? (essay)

science
a structure holds a baby. TRUE or FALSE. Explain. Show your work. Doublecheck and be patient.

Science
Where is most of the surface water on earth found? a) as freshwater in rivers b) as frozen water near the pole c) as groundwater under the surface d) as salt water in oceans I think its either A or D. Am I correct?

science
Calculate the ratio of kinetic energies of 3gms of hydrogen and 4gms of oxygen at a given temperature

Science
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.

Science
Compare the pH of CH3 COOH and Hcl.

Science
Give the reagents that can be used to prepare Kcl

Science
Give the reagents that can be used to prepare CucO4

science-chemistry
The extent of ionisation in a 0.75M solution of a monoprotic acid is 0.040. calculate Ka

science
Explain how you would prepare a sulphuric acid solution.

Science
If you are in a spacecraft that has been launched into space, your weight would A) Increase because gravitational force is increasing. B) Increase because gravitational force is decreasing. C) Decrease because gravitational force is decreasing. D) Decrease because ...

science
Why are rainforests the most diverse ecosystems? 1: they are near bodys of water 2: They have a favoritable climate 3: they are surrounded by mountains 4: they have more pollutants than any other ecosystem I think its 2 Am i right?

science
what is inertia?

science
A ball is thrown upwards and reaches the ground once again after 4 sec: (a)calculate the height that the ball reaches (b)the total distance covered by the ball (c)the velocity with which the ball hits the ground

science
If a bungee rope has a spring constant of 60 N/m. How far will it extend (stretch) if a person who weighs 600N (60Kg) is placed on it?

Physical Science
When sodium metal combines with chlorine gas, solid sodium chloride forms. is this a physical or chemical change?

science
Which of the following would decrease the magnetic field around a wire? A) Decreasing the current (MY ANSWER) B) reversing the poles of the wire C) looping a section of the wire into a solenoid D) increasing the current

science
A string with mass per unit length 0.0065 kg/m is used to suspend a 30 kg mass over a pulley. A transverse wave with wavelength 40 cm and amplitude 2.5 mm moves along the string. Determine the maximum speed of a particle on the string.

Science - Please Check
Consider a wetland ecosystem. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor. Suppose that the local temperature changes in favor of greater oxygen ...

Mpindweni s.s.s science
A rocket of mass 5000kg is launched vertically upwards into the sky at an acceleration of 2om/s. The magnitude of the force due to gravity on the rocket is 49000 N calculate the magnitude and diretion of the force of the rocket's engine.

Science
3. Which of the following small bodies are the hardest to tell apart because they are made of similar materials? dwarf planets and comets asteroids and comets comets and meteoroids asteroids and meteoroids** A scientist examines a sample of an object from the solar system. ...

Science
1. How do scientists classify small objects in the solar system? by size by shape by size, shape, and temperature by size, shape, and composition** 2.Which of the following categories of small bodies in the solar system does Ceres belong to? dwarf planets** comets meteoroids ...

science
Ki reacts with kio3 to give i2 then find mass ofkio3required to completely react with 83gram of ki???

Science
I want to determine how fast can the engine be lifted up!

Science
1.) How does natural gas have a impact on our economy by? 2). How does coal have a impact on our economy by? 3). How dies nuclear electric power have a impact on our economy by?

Life science,,maths lit,economic,business study
Which career field i have to follow?

Maths lit, life science,business study,economic
Wich career i have to choose

science
How did student , most probably measure the volume of 10 glass marbles?

pysical science
An automobile with a mass of 1258 kg accelerates at a rate of 5 m/s² in the forward direction. What is the net force acting on the automobile?

science
what is the enthalphy change for the formation of 1.00 gram of waater vapour from hydrogen and oxygen

Science
A banana turning brown when exposed to air is an example of. And the options for me are. A heterogeneous mixture, vaporization, a chemical change, an amorphous solid.

science
A mass of o.8 kg water at 25c is mixed with m kg of boiling water.The resultant temperature is 40c.Then find m is

Maths lit, life science, economics, geography
hey, I want to do medicine and civil engineering is this subjects are right? If not please tell me which career i can go to with this subjects after my matric? Thanks

Science
What is vectors?

science
Can somebody help me understand batteries? I'll explain what I know, then, you can tell me if I'm right or wrong. I know that a battery consists of three main parts: the anode, the cathode, and an electrolyte. The anode is electropositive and the cathode is electronegative. ...

Science
Is it fair that one athlete could beat another because of the kind of clothes he or she is wearing? Why?why not?

Science
Arrange the steps required to focus a compound light microscope on low power in the correct order. Then write the numbers for the steps in the blanks. 1. Viewing from the side, raise the stage so that the slide almost touches the lens. 2. Move the low power objective lens ...

science
What is the pathaway and processes of ingestion involved when a person has eaten a buttered polony sandwish?

science
When I push on my refrigerator, there is a force acting on it that wasn't there before. That means it should be experiencing an unbalanced force and begin to move. Why doesn't it?

science
When I push on my refrigerator, there is a force acting on it that wasn't there before. That means it should be experiencing an unbalanced force and begin to move. Why doesn't it?

Science PLEASE CHECK ALL
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. *** C. A living thing dies and its skeleton is left exposed...

science
Three year ago, Tom brought $750 worth if stock in a software company. Since then the value of his purchase has been increasing at an average rate of 123/5% per year. How much is the stock worth now? 0.126 x 750 ?

Science
Arrange the steps required to focus a compound light microscope on low power in the correct order. Then write the numbers for the steps in the blanks. 1. Viewing from the side, raise the stage so that the slide almost touches the lens. 2. Move the low power objective lens into...

Science
What effect does colored filter has on red,yellow and pink flowers?

Science
So I did a science experiment and I have to wrap a coil wire around a nail and tap the other end to a battery. Then see how many paper clips will stick to the nail, and I had to wrap more coil wire around the nail over time and stuff and record the data. Now I must choose the ...

Science
Together, satellites and ground receivers enable people using ______ to pinpoint their geographic location.

Science
What effects does Coloured Filters have on Red,Yellow and pink flowers?

Science
A particle moves along the parabola y = x^2 such that the x-component of velocity is always 2m/s. The acceleration of the particle is

Science
What is vector?

science
Find the initied valocity it which stop in 25 second the retidation produce in atrain is 1.2metersqure

Science
I have the 1st part of final tomorrow, how can I study it'll be a multiple choice test. Need help asap!

science
Calculate the no of neutrons present in 12x10^25 atoms of oxygen (8O^17)?

Science CHECK ALL
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. *** C. A living thing dies and its skeleton is left exposed...

Science
A squirrel drops an acorn from a tree.How does potential energy of the acorn compare to its kinetic energy just before the acorn hits the ground

Science
What do astronauts take to space/what materials do they need and use? Plz help ASAP i cant find enough information and i need 40 bulletpoints by tomorrow!

Check my answers? Science
The order of events and ages of rocks by examining positions is *relative dating*. Gaps in rock layers are called *unconformities*. What uses properties of atoms to find ages of rocks? *Absolute Dating*. A life form in Precambrian Time was *Cyanobacteria*. What signaled the ...

math,science
A car traveling at 22 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is its acceleration?

physical science
A car traveling at 22 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is its acceleration?

science
A wire of length 1m has resistance of 10 ohm.if its length become 2m by stretching it then what is new value of resistance?

science
How are continental glaciers different from valley glaciers

Science
Based on the density of the wood V=15.625 m=10.00 D=.64g/cm3, would the wood float or sink if it is placed in a bowl of water? Explain your answer. Remember that the density of liquid water is 1.00 g/cm3.

science
how many electrons are trasfered if a liquid has a on 7,5×10-19C

science
two forces each of magnitude 10newton act in opposite direction at the end of the table if the length of the table is 50centimeter calculate.The resultant force and moment acting on the table.

science
the density of o2 at NTP is 1.429g/l.calculate standard molar volume of the gas?

science
Imagine that you are standing in the shallow end of a swimming pool, you look ahead at the bottom of the pool and see a coin, Describe the difference between where the coin appears to be and where it actually is. a clear plastic cube, with exactly the same index of refraction ...

Science one question dont understand plz help ASAP
What will my instruments need to do? (You don’t have to have special names. If you know what kind of data you want to collect, you’ll know what the instruments need to do. Don’t forget that you may need to store samples or other information and find a way to get it (we ...

science
calculate number of oxygen atom in 2 mol sulphuric acid.

science
The measured density oe He at NTP is 0.1784g/l.what is the weight of one mole?

science
The density of o2 at NTP is 1.429g/l.calcute standard molar volume of gas?

science
How does graphite burn in air to give carbondioxide

maths,science,geography and life science
What is restorative justice intention in process of human rights?

Computer science
How is creating a virtual ecosystem similar from the real world?

Science
A cyclist of total mass 85 kg maintains a constant speed up an inclined plane. the plane is inclined at 20 degrees to the horizontal. with frictional force of 120 N. the cyclist covers a distance of 50 m along the inclined plane in 20 s. 1. Calculate the work done by the ...

Science
I'm writina a speech about a mythical character/legendary whom you admire

Computer science (please help)
How is a creating a virtual ecosystem different from the real world?

PHYSICAL SCIENCE
A BALL IS DROPPED (V=0) FROM A TOWER 7 M HIGH. HOW FAR WILL THE BALL HAVE FALLEN AFTER AA TIME T1=1 S, T2=2S AND T3 = 3S.

  1. Pages:
  2. <<Prev
  3. 29
  4. 30
  5. 31
  6. 32
  7. 33
  8. 34
  9. 35
  10. 36
  11. 37
  12. 38
  13. 39
  14. 40
  15. 41
  16. 42
  17. 43
  18. Next>>