Science

Recent Questions

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...

science
what do yo mean by 'ISA'relationship? explain showing its use in E-R model.

science
Lamont has a dark container. He knows that the container has a mass of 2.0 g when it is empty. He cannot see inside the container. However, he is able to use a balance to determine that the container has a mass of 2.7 g. What can Lamont conclude about the container? It ...

science
Amanda is holding a compass and notices that the north pole of the compass points toward the north pole of the Earth. She is confused because she knows from her science classes that the north poles of two magnets will repel each other. How can she explain this phenomenon? The ...

science
A boy is riding a skateboard. Why does the skateboard have the ability to do work? because it can slow down because the force applied by the rider acts in the opposite direction as the motion of the skateboard because it can change direction because the force applied by the ...

science
cite samples of lesson plan for elementary students

PHI 103
25. <21{8[1(07)95]}> Political science professor: Many people insist that the Internet is revolutionizing the political process. They argue that Internet debates and online political polls and chat rooms give people greater access to political information. And they’re ...

science: chemistry
How many moles of NaOH must be added to 1.0 L of 2.6 M HC3H5O3 to produce a solution buffered at each pH? 1)pH= 4.28 2)pH=pKa

Maths literacy and life science
Can i become an pathologist

science: chemistry
A buffered solution is made by adding 47.4 g C2H5NH3Cl to 1.00 L of a 0.68 M solution of C2H5NH2. Calculate the pH of the final solution. (Assume no volume change. Assume that all solutions are at 25°C.)

History life science geograhy maths literacy and languages
Which career should i follow? Please help

science
satlelite that monitor the ozoone hole

Science
36kg of some material undergoes a process in a piston-cylinder apparatus starting with an initial volume of .057m^3 and pressure of 680kPa. The final volume is twice the initial. Compute the work done by the substance for the following processes: (a) Pressure times volume is ...

Science
Final of geography

math lictracy,life science,geography,tourism,isizulu,english,life orantation.
please tell me the job i can do while im study that subjects?

English
We had to read Kennedy's Inaugural Speech: Vice President Johnson, Mr. Speaker, Mr. Chief Justice, President Eisenhower, Vice president Nixon, President Truman, Reverend Clergy, fellow citizens: We observe today not a victory of party but a celebration of freedom--symbolizing ...

Science Thermochemistry
How much heat would be liberated by the combustion of 2.5 moles of C. Delta Hc C=94600 cal

life science
what features do African ape share with humans

science, chemistry
"You run out of brown sugar and decide to use only granulated sugar instead. The cookies come out much thinner than usual. Design a controlled experiment to test your hypothesis *, describing how you would interpret your results. Please limit your response to one paragraph." ...

science
You run out of brown sugar and decide to use 1.5 cups granulated sugar instead. The cookies come out much thinner than usual. Design a controlled experiment to test your hypothesis, describing how you would interpret your results. Please limit your response to one paragraph.

blue bells model school
Science physics A ball A moving with kinetic energy E makes a head on elastic collision with a stationary ball with mass n times that as A . What is the potential enery stored during collision ?

science
The focal length of a concave mirror, that produces four times larger real image of an object placed at 5 cm distance from the mirror, is------

science
The focal length of a concave mirror, that produces four times larger real image of an object placed at 5 cm distance from the mirror, is------

science
. If you dissolve 70.0g of KNO3 at a temperature of 60.0°C, would the resulting solution be unsaturated, saturated, or supersaturated?

science
How food travels through various compartments

science
A concave mirror having a radius of curvature 40 cm is placed in front of an illuminated point source at a distance of 30 cm from it.Find the location of the image.

math
In a science experiment, the temperature of a glass of water rose 18.24 degrees after six hours. If the temperature rose the same number of degrees per hour, then how many degrees did the water increase per hour?

science
write aout chemistry

rearabilwe
i am doing Economics,life science, maths lit, agriculture,english,lo and Setswana i want to know what careers are possible with this subjects

Physical Science
A hot iron ball is dropped into 200.0 g of cooler water. The water temperature increases by +2.0°C and the temperature of the ball decreases by -18.6°C. What is the mass of the iron ball?

science,
A force of 4400 N is exerted on a piston that has an area of 0.020 m2. What force is exerted on a second piston that has an area of 0.040 m2?

ramatau senior secondary school
life science,geography,life science,history,mathematical literacy,english,sepedi,life orientation

science
Some say that the hot air balloons with which the Montgolfier brothers performed their first flight had a volume of 1700 cubic metres and could lift 780 kilograms (that includes the balloon, basket and payload). Assume that the balloon took off on a day when the sea level ...

Science
If the specific heat of a marshmallow is 2 J/g, how much heat is given off when it cools from room temp (25C) to its liquid nitrogen bath. Weight of the marshmallow 7.4g

science
what is the probability that if each parent has one brown eye gene and one blue eye gene will have one chance in four that there children will get two blue eye genes?please help.

Setlhwane
Maths lit,life science,agricultural science,geography.....can i qualify for law school with this high school subjects?

science
The greenhouse effect is caused by the burning of fossil fuels and deforestation

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