# Science

## Recent Questions

Maths literacy ,life science,history,geography
Which university or college take the subjects that i am doing

maths,geography,life science,history
explain in a short paragraph what can trgger spectator aggressive in sport

math lit,life science,geo and history
which careers require these subjects?

Science
A charge q1=7.00 x 10^-6 is placed 0.300m from a second charge q2=-5x10^-6 C. Find the magnitude the force between the two charges.

Science
A cord of negligible mass is wound around the rim of a flywheel of mass 20 kg and radius 20 cm. Steady pull of 25 N is applied in tue cord. The flywheel is mounted on a horizontal axis with frictionless bearings. Compute the angular acceleration of the wheel. Find the work ...

Science
An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.5 A, how much electrical energy is used by the bulb in 15 minutes?

Science
What is the force that results from a 3,000 kg car accelerating at 20.00 m/s2? A. 150.0 N B. 3,000 N C. 3,020 N D. 60,000 N** I think D

Science
How many valence electrons does magnesium (Mg) have? A. 12 B. six C. three D. two

Science
A 55 kilogram person and a 65 kilogram person climb 8 meters up a flight of stairs in 10 seconds. Compare power used by each person

Weight Is Force! Science
A space ship has a mass of 9000kg. the space ship is launched from Earth and lands on a distant planet where it has a mass of 390000 N. What is the acceleration of the gravity on this planet?

physical science
a symmetric projectile spends a total of 20 seconds in the air. it reaches a peak height of 8 meters. how long does it take to reach its peak height? the projectile has a range of 80 meters. what is its horizontal velocity? what is the projectile's horizontal acceleration? ...

physical science
a flower pot is dropped out a twentieth story window. how fast will it be moving after 7 seconds? how much is the acceleration 3 seconds after it falls?

Weight Is Force! Science
A space ship has a mass of 9000kg. The spaceship is launched from the Earth and lands on a distant planet where it has a weighted of 39000 N. What is the acceleration of gravity on this planet?

physical science
a piece of metal has a mass of 85 cg and a volume of 450L. What is its density in g/cm^3? What would be the mass of 300cm^3 of this metal? What would be the volume of 200 ounces of this metal?

physical science
how many centimeters long is the proverbial "10 foot pole?" show work

Science
A girl standing on a bridge throws a stone vertically downward with an intial velocity of 15.0 m/s into the river below. If the stone hit's the water 2.00 seconds later what is the height of the bridge above the water?

science help pls pls
The table below shows the average annual precipitation over a period of five years in three locations of Florida. Locations | Amount of precipitation 1 between 45- 65 inches 2 more than 96 inches 3 less than 8 inches Which of these statements is correct for the three locations...

science help pls pls
Which of these is an example of how the ocean plays an important role in climate change? The warm Gulf Stream helps maintain moderate temperature in coastal regions in southern Florida. Aquatic animals produce carbon dioxide during respiration which causes warming of ocean ...

science help pls pls
A student designed an experiment to demonstrate the interaction between Earth systems. The steps of the experiment are given below. *Take a pot full of dry soil. *Keep the pot in direct sunlight. *Do not water the soil for a week. *Observe cracks in the soil after a week. The ...

Science
Which of the following is not a benefit of wetlands? a) wetlands provide a place for exceptional weather to occur** b) wetlands provide a habitat for fish and wildlife c) wetlands clean and recharge water supplies d) wetlands reduce flooding risks 2. a wetland is to a ...

Science
Which solution will best allow the movers to achieve their goal? A) Change the width of the ramp from 4 meters to 3 meters. B) Change the length of the ramp from 4 meters to 5 meters. C) Change the height of the ramp from 3 meters to 4 meters. D) Change the length of the ramp...

science !!
1. how do scientists classify stars? by size distance and color by size distance and brightness by color brightness and distance by size brightness and temperature 2. which of The following factors determines how long is Star will live a stars color stars mass the stars ...

science
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. Melinda...

science
if the mass of the earth is 598*10 to the power of 22km and the mass moon is 7.36*10 to the power of 22kg. calculate the difference in their masses, what is the answer in scientific notation

maths lit,life science, geography and economics
Which career should I follow with those subjects I don't know what to do

Science.
2. Select 3 terms that belong together. To do this, pick one term from each of the 3 sets. Set 1: intertidal zone, neritic zone, deep zone Set 2: moderate light levels, freshwater, temperature fluctuations Set 3: clams, squid, beavers. A. intertidal zone, temperature ...

Science
1. Which of the following explains why sunlight is important to the aquatic ecosystems? A. Sunlight provides a source of heat and energy to increase water temperatures. B. Sunlight keeps harmful bacteria from taking over aquatic ecosystems. C. Sunlight makes it possible for ...

science
A car moves 3 kph. Car B which is 50 m ahead of Car A is moving at 6 kph. If car A accelerates by 5m/s/s, determine if the cars will collide

Science
Kilograms divided by Newton?

Science
How do you do kilograms multiplied by Newton?

Science
You are walking on a moving sidewalk (moving at a speed of 2 mph).if you are walking in the same direction as the sidewalk at a speed of 4 mph what is your velocity relative to the ground what would be your velocity if you were walking in the opposite direction as the moving ...

Science
Tomorrow I have the midterm (Lab-Earth Science) on 1 Minerals Igneous Rocks Sedimentary Rocks 2 Topographic Maps 3 Geologic Time Help with this, please.

science ms.sue or mr.reed plz help me
why does the design of the vacuum flask minimize heat transfer by conduction

Science
Describe how the meteorite collision at the end of the Mesozoic affected the atmosphere and the biosphere.

science
Can scientists use radiocarbon dating to find the age of a very tall, old redwood tree living in an old growth forest?

Science
1.)Which of the following are chemical changes? A.)Boiling Of Water B.)Melting A Cube of ice C.)Dissolving 10 grams of salt in water D.)Splitting water into hydrogen and oxygen 2) What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen? (1 ...

Science
Describe ozone creation and loss in the ozone layer. Does one occur more than the other?

physcal science
If the velocity of the car is increased to 45 km/hour, what is its kinetic energy?

science
nickel complexes(ethylenediamine) with graph of absorbance vs wavelength

science
A cylinder of length 5cm and uniform cross section area 50.24cm^2 is suspended from a spring balance and totally immersed in water.If the density of the material of the cylinder is 1.25g/m^3. Determine the upthrust on the cylinder. Take g=10m/s^2 density of water=1000kg/m^3

Science
what is the role of malic acid in the reproduction of fern plant

science
A 34.0-kg crate is being pushed across a floor. The net horizontal force on the crate is 80.0N. Starting from rest, the crate is pushed over a distance of 4.4m. What is the final speed of the crate?

I NEED HELP! Science
What happens when particles of a material move father apart?

Mathematics, geography, agricultural science, life science, English, Life orientation And sepedi
I'm doing grade 11 but still I don't know what or which kind of job careers that needs these subjects Agricultural science, Geography, life science, mathematics (pure), Sepedi, English, And lastly life orientation..Help me please and appreciation will bless you.

Science
If you began with 36 grams of water how many hydrogen and oxygen can you produce in a decomposition reaction

Earth Science
How does altitude affect climate (beyond just temperature)?

Science
A row of elements on a periodic table is called a(n) A: group *** B: Period C: valence D: orbital Is this right?

computer science
a memory's addressibility is 64 bits what does tell you about the size of the MAR and MDR?

science
a car reduced it's velocity uniformly from 21m/s to14m/s in 10seconds (A) find the retardation (B) the distance cover in this time

History
What is taxonomy? a subgroup of organisms (I also feel like its this one also) the classification of plants based on their medical uses an organisms's evolutionary history the science of classification (my answer)

1: Which of the following is the minimum level of structure needed to perform the function of waste removal? A: Body System B: Tissue C: Cell*** D: Organ 2: Which two systems work with the muscular system to allow the body to move? A: Digestive and Urinary systems B: Skeletal ...

Science/Biology
the vessels that contain the largest volume in the vascular system are? I think Arteries

Science
A 20 kg mass slides down an inclined plane which is at an angle of 60 degrees to the horizontal 1. Horizontal component of weight force 2. Vertical component of weight force 3. Angle 4. Normal force 5. Net fx 6. Acceleration along incline I really do not get how to do this, I ...

science
if mass of a body is 8g and volume is 10cm3 what is density

science (physics)
A copper wire with cross sectional area 0.00030cm^2 is to be used in lifting a 100g object.How fast can the object be accelerated if the wire is to stretch not more than 0.10%? What i know is that first find the elongation & then that will help to find acceleration..

science
Physic. You can walk at the average speed of 2.5 m /s. How long will it take to reach your school 1km away?

Science (Physics)
Air becomes a conductor when the electric field strength exceeds 3.00 × 106 N/C. Determine the maximum amount of charge that can be carried by a metal sphere 8.5 m in radius. The value of the Coulomb constant is8.99×109 N·m2/C2. Answer in units of C. I have the equations E=...

Science
A. alleles B. mitosis C. DNA D. phenotype E.chromosome F. codominance G. diploid H. meiosis I. incomplete dominance J. centromere K. reproduce L. RNA 8. Chromosome pairs contain different versions of genes, which are called __________________. (1 point) alleles 9. The process ...

science
Who goes to connections? I would like to get answers to questions from the cyber school that im going to

Science
Air pollution can be controlled by? A. permitting more storm runoff B. burning more coal C. eliminating sewage D. putting scrubbers on power plants I think it is B

science
if A-B=2C,A+B=4C and C=3i+4j, then what are A and B?

Science/biology
A 62 year old man experiences sudden onset of difficulty breathing, followed by double vision, and later by abnormal kidney and liver function tests. Of the following conditions, which is most likely the cause of his problems? A. Vasculitis​​ B. Raynaud's ...

Science
1.) when might preserved remains of an entire organism form? A.) when sediment buries the hard part of an organism B.) when an event such as a quick burial or freezing preserves an entire organism ******* C.) when minerals replace parts of an organism D.) when a thin layer ...

science
nitrogen and hydrogen combined in the ratio 14:3 by mass to form amonia molecule.find the formula of amonia molecule by calculating the molar mass (atomic mass of nitrogen = 144.4).

Science
Lightning is actually van enormous display of the concept of ?

science
Calculate the amount of h2so4 required for preparing 500ml of 2MH2so4 solution.

science
An incident Ray makes 60 degrees angle with the surface of the plane mirror, what is the angle of refraction. Options are...a 60 b 90 c 30 d 0....this is a question in a guide is it correct

science
Which of the following are psychological characteristics that Beatrice Whiting and John Whiting found to crosscut cultural boundaries

SCIENCE
jamal's neighbor tells him that there are more bacterial cells than human cells in his body. which of these is the best reason that jamal should question his neighbors statement? a. jamal is older than his neighbor b. jamal does not like his neighbor very much. c. his neighbor...

Science Help
jamal's neighbor tells him that there are more bacterial cells than human cells in his body. which of these is the best reason that jamal should question his neighbors statement? a. jamal is older than his neighbor b. jamal does not like his neighbor very much. c. his neighbor...

Science /bio
Any foods or fruits highest in glucose?

Science
A coconut of mass 2kg is on a tree of 5m tall; determine the potential energy of this height Take g=10ms^-2.

science
a man has a mass of 80,0 kg is standing on the surface of the earth. a )calculate the magnitude of the attractive force (gravity) that the earth exerts on the man.(784n) b)how does your answer in a) compare to the magnitude of the force that the man exerts on earth? c)use your...

Computer Science/Pseudo Code Python
Hi, I'm confused about an assignment. I'm not sure what to do and would like some help. An example: Write a program that obtains two integer numbers from the user. It will print out the sum of those numbers. Pseudo code: Prompt user to enter first integer number Validate user ...

Science
What is g efeective?elustrate an example.

Science
1. How does nanotechnology how engineers make products for the future? A. By changing a materials atomic structure, it can be made from elements that are easier to obtain. B. By changing a materials atomic structure, it's physical properties can also be changed. C. By changing...

Science - Ms. Sue plz
Which structures on the ocean floor are equivalent to mountains on land? Thanks.

SCIENCE
a body at rest is given an innital uniform acceleration of 8.0m/s-2 for 30s,acceleration reduce to 5.0m/s-2 for d next twenty sec.body mentains speed ten for 60s after brought to rest in 20s draw in graph 1.using d graph to calculate 2.maximum speed attain in motion 3.total ...

science
How can i prepare a 100ml, 0.1M phosphate buffer solution (pH = 7) out of Na2HPO4 and NaH2PO4

Science
How many grams of sodium hydroxide are needed to react with 50 grams of phosphoric acid?

Chemistry
I have to summarize 10 articles relating to the topics we had covered in class. However, there are 3 sources out of the 10 that I don't understand. Could someone possibly go through the sources and summarize them. 1.) This article covers Nuclear Chemistry (Nuclear Reactors) to...

Science HELP PLS
how are earth and venus similar? how is venus different from earth? provide two similarities and two differences

science
An electric lamp rated at 48w,12-v supply. Calculate the current flowing in the lamp and the resistance

In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the  A. cathode. B. deflecting plate. C. anode. D. grid. ? The part of the atom that accounts for electricity is the  A. nucleus. B. electron. C. neutron. D. proton. B?

science
a bike weighs 200 n. if it starts from rest and travels 100 m in 5 s undergoing constant acceleration, what net force is causing the acceleration

Science
Jawless fishes and salamanders are alike in that both types of animals A. are amphibians B. have backbones C. have fins D. are smooth skinned organisms B or D

Science
Physical properties of silver carbonate.

Math
Wanda wants to have a test average of 90 her four science tests. On the first three tests, she got scores of 84, 96, and 85. What does she need on her last test to reach her goal?

science help
Which of the following is typically associated with a reduction in photosynthesizing plants in a water supply? An increase in dissolved oxygen A decrease in dissolved oxygen An increase in phosphates A decrease in phosphates is it d

science help PLS
Which of the following is the most likely way for bacteria and viruses to enter a water supply? Increased photosynthesis releases bacteria and viruses Poor sanitation habits cause water to mix with sewage Water from a burst dam sweeps particulate matter into a nearby river ...

science
show that the moment of inertia of a solid cylinder with radius R, mass M, and length L is 1/2(MR^2)

Science
A microwave oven supplies 1.000kj per second.how many min should be set on the microwave in order to heat 250.g of water from 24.3 degrees c to its boiling point?

science
show that the moment of inertia of a uniform rod of length L and mass M about an axis perpendicular to the rod and passing through its center of mass is 1/12(ML^2)

Science
Which of the following would likely be part of an ionic bond? Choose all that apply (2 points) A. K+1 B. Cl2 C. F-1 D. Ne

Science
How many valence electrons does an atom of rubidium have?

science
Two forces whose resultants is 100N are perpendicular to each other. If one of them makes an angle of 60 degree with the horinzontal. Calculate its magnitude

Science
What is the reproduction rate of the bacteria species Vibrio Cholerae?

Science
Johnny left a glass of milk on his bedside table for week, and it spoiled. At the end of the weel, the glass contained a yellow liquid with lumpy white chunks, and there was a terrible odor. What can be concluded? A. The milk has undergone a physical change B. The mass of the ...

life science,mathematics,agricultural,tourism
which study fields I should take?

history,geography,life science,maths literacy
provide three possible financial sources for assistance that you can access for funding your studies and indicate the financial obligations you will have if you choose each of these options