Science

Recent Questions

BHEKISISA
ENGLISH.ISIZULU.LIFE SCIENCE. LIFE ORIENTATION.MATH LITERACY.HISTORY ND GEOGRAPHY. am doing grade 11 so has am doing this subject iwant to know which career i must task when i pass my matric plz help me

Science
do radioactive elements occur naturally on earth

Science
does the air in our atmosphere contains elements that we breathe with every breath

u.s. history
Use the quote below to answer the following question. “[T]hese Powers . . . are so distributed among the Legislative, Executive, and Judicial Branches, into which the general Government is arranged, that it can never be in danger of degenerating into a monarchy, an Oligarchy...

Science
The lesion is located in the right thorax just lateral to the mid-saggital plane

Science
How is 0.00069 written in scientific notation? A)69 x 10^–5 B)6.9 x 10^4 C)0.69 x 10^–3 D)6.9 x 10^–4 My Choice is A

science
An ant travelled along the vector a whose magnitude is 10 meters and direction is 45 degree to horizontal and then moved along vector b whose magnitude is 9 meters and direction is 0 degree with horizontal . Find its displacement

life science
Two breaking tubes,two drnking staws,clear lime water

science
A combination of two prism one of flint &other of crown glass produces dispersion without deviation.The angle of the flint glass prism is 15degree . Calculate the angle of crown glass prism & the dispersion separation of red & violet rays an emergence from spectroscope.refra. ...

Science
There can be several controlled variables. If an experiment is to be useful, only one variable at a time can be manipulated intentionally. All other variables must be controlled throughout all parts of the experiment. If more than one variable is altered, the results of an ...

Computer science
use a modular approach and pseudo- code to design a suitable program to solve it. Allow the user to enter a series of temperatures in degrees Celsius (C) termi- nated by the input of −999. For each one, find the corresponding tempera- ture in degrees Fahrenheit (F). The ...

life science
what is the removal of trees without adequate replanting?

University, subject science
What is the difference between plasmid and chromosomal DNA? What is Mutant bacteriophage?

science
an automobile of mass 1800kg takes a turn of radius 270m. If the force on the tyres to maintain the motion along the curve is not to exceed 630n, the limiting speed of the vehicle assuming no banking will be

Science
You have 75.0 mL of a 2.50 M solution of Na2CrO4 (aq). You also have 125 mL of a 2.15 M solution of AgNO3 (aq). Calculate the concentration of NO3 when the two solutions are added together.

Science
How to find the volume of the solvent that is added to a diluted solution.

science
Hey im doing grade 11 at 2012 but I drop out at June but I have the results at March report.so how do I do to get a matric or finish school?

science`
When doing an experiment, it is important to follow all of the procedures EXCEPT ______________. Question 1 options: wearing protective goggles arranging and organizing the work space neatly understanding the meaning of the safety precautions using smaller beakers before using...

Science
Give the scientific terminology for each discription 1The chemical synthesis process in plants in which CO2 plays a vital role 2Manure that comes from plants that are planted,but not harvested 3The name of the first step in the ostwald process

science cbse school
6.66m/s2

Science
In a scientific experiment, facts, figures, and other evidence gathered through observations are called? A. Data(?) B. Manipulated Variables C. Responding Variables D. Laws

Science
I have 8 questions and 1 question in the end that I don't need help with. Identify possible variables in the following situations. What variables can affect the sprouting of a bean seed? I think (I didn't answer yet so I'll just go with what I think oh and these aren't multi ...

Life Science
determing whether expired air contains CO2. 1.Formulate hypothesis 2.Aim 3. a) idependent V, dependent and controlled variables 4. methods step by step 5. observation

science
I need help with an acrostic poems or name fororn for lab sa

physical science
zinc electrode is placed in a solution of lead nitrate.write a balanced equation

Math (Probability)
In a random poll of science students, it was determined that 90% of students submitted tests before the deadline. In a random sample of 75, what is the probability that exactly 10 submitted after the deadline? What is the probability that less than 10 submitted after the ...

Science
Explain how you would design an experiment to text your hypothesis.it's about my pet birds.

Science
Explain how you would design an experiment to text your hypothesis.

Science
The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound? Molar mass of CO2= 44.01 Molar mass of H20= 18.01 2.58g/44.01=0.586 mol CO2 .53g/18.01=.0294 mol H2O I Don't know where I went wrong?

math, science, everything else for 10th grader
If sec x = 17/8; verify that 3 - 4sin^2x /4cos^2x -3 = 3- tan^2x / 1-3tan^2x.. I have used x in place of theta. It isn't multiplication symbol.. ^2 means to the power 2. Pls help

Science
4. Which geographic feature marks the last natural obstacle for Georgia's rivers on their way to the Atlantic Ocean? A) the Floridian Aquifer B) the Vally and Ridge region C) the fall line D) the Marshes of Glynn I got A but I'm not sure if it's right

science
Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways? A. Until disproved, an explanation for an observation is valid. B. Certain concepts cannot be subjected to direct experimentation. C. A hypothesis ...

science
Which of the following nitrogenous bases is found exclusively in DNA? A. Adenine B. Cytosine C. Guanine D. Thymine i think it's D

Science
what are the effects of oxygen on medal.

science
Should designers of Olympic medals use oxygen (O) to make an Olympic medal?

science
An eagle is a carnivore. It MOST LIKELY gets the energy it needs to reproduce from A) oxygen. B) plants. C) the sun.--------- D) rodents.

science
31. Two students collect information about the number of dandelions in a park. Based on their sampling, they estimate that there are 900 dandelions in the 300-square-meter city park. To determine the accuracy of their estimate, which of the following questions is necessary? A...

science
Which of the following chemicals is insoluble in water? A. C6H6 {benzene) B. HCI (hydrochloric acid) C. NH3 (ammonia) D. NaHC03 (sodium bicarbonate)

Science
Consider 3 identical metal spheres A,B and C. A carries a charge of +5q b carries a charge of -q and C carries no net charge. Sphere A and B are touched together and then separated. C is then touched to A and separated from it.

physical science
the elevators in the landmark tower yokohama japan are among the fastest in the world. they accelerate upward at 3.125 m/s2 for 4.0 seconds to reach their final speed. if these elevators start at rest what is their final speed?

Science
victoria discovered a new way to keep her hands warm on a cold day. what scientific attitude is this an example A. Creativity ********* B. skepticism C. Honesty D. Good ethics Please help thanks :)

science
Giraffes have long necks that allow them to reach more food sources in their habitat. The long neck trait is an example of A. selection. B. adaptation. C. radiation. D. homology.

science
Darren says that he weighs 50 kg. Can you measure weight in kg?

science
A 5.3-g bullet is fired horizontally into a 3.6-kg block of wood suspended by a rope from the ceiling. The block swings in an arc, rising 5.4 mm above its lowest position. The velocity of the bullet was:

science
A 64-kg woman stands on friction less level ice with a 0.9-kg stone at her feet. She kicks the stone with her foot so that she acquires a velocity of 9.2 cm/s in the forward direction. The speed acquired by the stone is:

science
A 6.4-N object is traveling at 9.9 m/s. It strikes an 2.1-N object, which is stationary. The two objects stick together. Their common final speed is:

science
A 3.4 kg-object moving at 9.9 m/s perpendicular to a wall rebounds from the wall at 4.5 m/s. The magnitude of the change in the momentum of the ball is:

science
A 3.00-g bullet traveling horizontally at 500 m/s hits a 4.8-kg wooden block, which is initially at rest on a smooth horizontal table. The bullet buries itself in the block without passing through. The speed of the block after the collision is:

Physical science
Ball A attracts B and repels C. Ball D attracts B and has no effect on E. A negatively charged rod attracts both A and E. What are the charges,if any,on each ball?

Life science
Explain the scientific interpretation of the fossils found in the cradle of humankind.

Science
How does water acts as an insulator and a shock absorber?

Hwiti High School
Which career path i can follow with the following subjects:geography,history,maths literacy,life science,english,sepedi ans life orientation?

Science
What is the difference between a scientific theory and a scientific law? A. A scientific theory describes a pattern of observations, while a scientific law is an educated guess based on observation. B. A scientific theory is based on a few experiments, while a scientific law ...

Math
In a science competition with ten problems, a student gets 5 points for a correct answer and loses 2 points for an incorrect answer. If Alice answered every problem and her score was 29, how many correct answers did she have?

Algebra
In a science competition with ten problems, a student gets 5 points for a correct answer and loses 2 points for an incorrect answer. If Alice answered every problem and her score was 29, how many correct answers did she have? i'm thinking you have to set up an equation but i'm...

Physical Science- Atomic Structure
An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1? 2 eV 4 eV 8 eV 12 eV

science
what are the different daily observations in seed germination. What are the factors and its effect on germination? Data Chart: Cup #1 Seeds with water and sunlight Cup #2 Seeds with water and no sunlight Cup #3 Seeds with sunlight and no water OBSERVATION Cup #1 / Cup #2/ Cup...

science
C respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). 'A' dissolved 50 g of NaOH in 100 ml of water B dissolved 50g of NaOH in 100g of water while C dissolved 50g of NaOH in water to make 100ml of ...

phyiscal science
calculate the height a block of ice at -25 deg C must be dropped in order to completely melt on impact. No air resistance and all energy goes into melting the ice.

nsikayethu secondary comprehensive school
physical science (chemistry).place them in order Which liquid will evaporates faster between ethanol, nail porish remover, methylated spirits and water

Science
Having trouble with the independent and dependent variable in an if then statement. "If root growth is related to gravity, then roots will always turn toward the earth regardless of a seed's orientation."

lot mashiane secondry school
if I choose maths literacy, history, geography and life science which job I'd related to this subject

science
Name the elements present in Sulphuric acid?

engineering physics 1-science
A crate of mass m(=32 kg) rides on the bed of a truck attached by a cord to the back of the cab . The cord can withstand a maximum tension of 68N before breaking. Neglecting friction between the crate and the truck bed, find the maximum acceleration the truck can have before ...

science
a body is pulled towards the west by the force of 10N making an angle 30 degree with the south. What are the magnitude of the south and west direction component of the force?

science
Whar are two longest wavelength in frequency 1kghz and 200kghz

Science
Balance this equation using oxidation method:I2+HNO3---->HIO3+NO2+H2O

integrated science
Why was NaOH used in an Biuret test to run a experiment

science
A hawk flies in a horizontal arc of radius 12.0 m at a constant speed of 5.4 m/s. It continues to fly along the same horizontal arc but increases its speed at the rate of 2.8 m/s2. Find the acceleration magnitude under these conditions.

science
A straight wire with a length of 0,20m move at a constant speed of 3,3m.s at right angle to a magnetic field of flux density 0,,15T..calculate the emf induced across the ends of the wire?

DPS sub: science ( chemistry)
an element 'x' react with water to form a solution which turns phenolphthalein indicator pink .The element 'x' is most likely a) sulphur b) sodium c) carbon d) silicon

management science
A company manufacture two products x snd y by means of two processes A and B .The maxinum capacity of processes A is 1750hours snd of process B 400.each unit of product X require 3 hours in A and 2hours in B while each unit of product Y requires 1 hour in A and 4 hours in B ....

science
a family wants to begin saving for s trip to paris the trip is planned for three years from now and the family wants to accumulate one million shilling for the trip.if twelve deposit are made quartely to an account which earns interest at the rate of 8 percent per year ...

Physical Science
Four forces of 10N,8N,6N and 4N act at the same point of an object on bearing 0 degrees,90 degrees,135 degrees and 270 degrees respectively

science
calculate the osmotic pressure at 18.5 degree celcuis of a suspension containing 30g/L of solid particles. each particle weighs 10^-9g.

science
The scientist came to the conclusion that the hypothesis was incorrect. Why is the scientist's conclusion flawed

science
The scientist came to the conclusion that the hypothesis was incorrect. Why is the scientist's conclusion flawed

Science
If an experiment disproves a scientist's hypothesis, what should the scientist do next?

Science
What type of scientific thinking did Wegner employ to develop his theory

NURSING ASAP
Is nursing considered a a science major because I'm taking this course called "CHEM 1001 Chemistry and the World Around Us?" and I studying nursing in college. Please be honest. Thank you! :)

life science
At high altitude the atmospheric pressure is lower and the air is less dense than at low altitude.this means that at high altitude there is less oxygen available for gaseous exchange thus gas exchange becomes less efficient. what conclusion can be made?what will happen to the ...

life science
Investigation to determine whether expired air contains carbon dioxide how should state the method,step by step for the experiment

Life science
Why are thesa fossils important discoveries?

science
what is the farenheit celsius kelvin of 300 ml of coffee . ?

Science
The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below: 2 1/4 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 1 cup butter or margarine, softened 3/4 cup granulated sugar 3/4 cup packed brown sugar 1 teaspoon ...

science
what is heat?

maths literacy,life science,agriculture,history
hi guys i would like you to help with this quation, I am doing grade11 and doing the above subjects .I am wodering what should i major in at varsity something intresting.

Science
The atmospheres of the planets in our solar system differ in their physical compositions. Which planet would you expect to have the thickest atmosphere? a planet with a hot atmosphere and strong gravity a planet with a cold atmosphere and strong gravity a planet with a cold ...

Science
The atmospheres of the planets in our solar system differ in their physical compositions. Which planet would you expect to have the thickest atmosphere? a planet with a hot atmosphere and strong gravity a planet with a cold atmosphere and strong gravity a planet with a cold ...

Computer Science
public class PrimeNumbers { public static void main(String[] args) { int x = 100; for(int i=2; i <= x; i++) { if(i%2==0) System.out.println("notprime"); System.out.println(i) ; if(i%1==1) System.out.println("prime"); } }

Science
1.A lift weighting 1000kg is moving upwards with an acceleration of 1m/s^2.The tension in the supporting cable is (a)980N (b)10800N (c)9800N (d)8800N 2.A person of mass 60kg is inside a lift of mass 940kg and presses the button on control panel.The starts moving upwards with ...

science
locate the position of the centre of mass of a system of particles of mass m1=1kg,m2=2kg and m3=3kg situated at the corner of an equilateral triangle of angle 60degres and side 1m

science
How are moon observations from space different from moon observations made on Earth? I think there is no deifference.

Science
{1}Discuss the parts of typical alimentary canal of multicellular organisms. {2}State the action of following enzyme in the process of digestion (a)Salivary amylase (b)Pepsin (c)Pancreatic enzyme (d)Trypsin (e)Lipase

Science
Consider a car moving along a straight horizontal road with a speed of 72km/h.If the coefficient of static friction between the tyres and the road is 0.5,the shortest distance in which the car can be stopped is(taking g=10m/s^2) (a)30m (b)40m (c)72m (d)20m

Maths,history,andriculture,life science
What my career if i'm doing this subject maths,life scienc,history,agriculture

science
The potential difference measured across a coil is 20 V when a direct current of 2 A is passed through it. With an alternating current of 2 A at 40 Hz, the p.d. across the coil is 140 V. If the coil is connected to a 230 V, 50 Hz supply, calculate: (a) the current; (b) the ...

Science
Minerals make up most of the rocks on Earth's surface. What are three changes that can cause minerals to form by metamorphism? pressure, temperature, melting temperature, melting, physical makeup temperature, pressure, chemical makeup pressure, physical makeup, melting I ...

science
water has a density of 1.0 g/ml, and a test liquid has a density of 1.1 g/ml. If you pour equal portions of the two liquids into a cup,what will happen(assuming that the substance do not mix or create a chemical reaction

science
Florida was once part of Gondwana, which was a supercontinent that later divided into Africa and South America. Which statement best describes this process? Africa and South America go through cycles of dividing and colliding. The continents have been moving throughout Earth's...

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