Friday
July 31, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

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.
Friday, July 31, 2015 by Anonymous

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 ...
Thursday, July 30, 2015 by Nour

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 ...
Thursday, July 30, 2015 by Nour

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"); } }
Thursday, July 30, 2015 by Jake

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 ...
Thursday, July 30, 2015 by Diwije

Computer Science
I got an assignment to write all prime numbers up to 100 in java. This is what I've got: public class PrimeNumbers { public static void main(String[] args) { int x ; for(int i=1;i<x;i++); { if(x%i==0) return false; else if for(int i=1;i<x;i++) { if(n%i==1) return ...
Thursday, July 30, 2015 by Jake

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
Thursday, July 30, 2015 by keegan

science
How are moon observations from space different from moon observations made on Earth? I think there is no deifference.
Wednesday, July 29, 2015 by Nour

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
Wednesday, July 29, 2015 by Diwije

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
Wednesday, July 29, 2015 by Diwije

Maths,history,andriculture,life science
What my career if i'm doing this subject maths,life scienc,history,agriculture
Wednesday, July 29, 2015 by Lusanda

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 ...
Wednesday, July 29, 2015 by mpho

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 ...
Tuesday, July 28, 2015 by Nour

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
Tuesday, July 28, 2015 by earica

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&#...
Tuesday, July 28, 2015 by Nour

science
what do yo mean by 'ISA'relationship? explain showing its use in E-R model.
Tuesday, July 28, 2015 by nakul

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 ...
Monday, July 27, 2015 by Nour

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 ...
Monday, July 27, 2015 by Nour

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 ...
Sunday, July 26, 2015 by Nour

science
cite samples of lesson plan for elementary students
Sunday, July 26, 2015 by tina

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’...
Saturday, July 25, 2015 by Anonymous

Maths literacy,sepedi,life science,Lo,english,geography and agriculture
Which job can i get when i studied those subjects?
Friday, July 24, 2015 by Makoma

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
Thursday, July 23, 2015 by Julie

Maths literacy and life science
Can i become an pathologist
Thursday, July 23, 2015 by Bonolo

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.)
Thursday, July 23, 2015 by Julie

History life science geograhy maths literacy and languages
Which career should i follow? Please help
Thursday, July 23, 2015 by Davido setshele

science
satlelite that monitor the ozoone hole
Tuesday, July 21, 2015 by xious

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 ...
Monday, July 20, 2015 by J.T.

Science
Final of geography
Monday, July 20, 2015 by Anonymous

math lictracy,life science,geography,tourism,isizulu,english,life orantation.
please tell me the job i can do while im study that subjects?
Monday, July 20, 2015 by thembekile zulu

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--...
Monday, July 20, 2015 by Grace

Science Thermochemistry
How much heat would be liberated by the combustion of 2.5 moles of C. Delta Hc C=94600 cal
Sunday, July 19, 2015 by Bryan Molina

life science
what features do African ape share with humans
Sunday, July 19, 2015 by xonolo

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 ...
Sunday, July 19, 2015 by llau

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.
Sunday, July 19, 2015 by llau

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 ?
Sunday, July 19, 2015 by kanika

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------
Sunday, July 19, 2015 by sanjay

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------
Saturday, July 18, 2015 by sanjay

science
. If you dissolve 70.0g of KNO3 at a temperature of 60.0°C, would the resulting solution be unsaturated, saturated, or supersaturated?
Friday, July 17, 2015 by joulie

science
How food travels through various compartment
Friday, July 17, 2015 by neha

science
How food travels through various compartments
Friday, July 17, 2015 by neha

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.
Thursday, July 16, 2015 by tiger

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?
Thursday, July 16, 2015 by veronica

science
write aout chemistry
Thursday, July 16, 2015 by bhawana bhusal

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
Thursday, July 16, 2015 by BOPHELO

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?
Wednesday, July 15, 2015 by elise

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?
Wednesday, July 15, 2015 by cristopher

ramatau senior secondary school
life science,geography,life science,history,mathematical literacy,english,sepedi,life orientation
Wednesday, July 15, 2015 by shai lucia kamogelo motlanalo

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 ...
Wednesday, July 15, 2015 by sakthi

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
Tuesday, July 14, 2015 by Jon

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.
Tuesday, July 14, 2015 by abibirty

Setlhwane
Maths lit,life science,agricultural science,geography.....can i qualify for law school with this high school subjects?
Tuesday, July 14, 2015 by Rebecca

science
The greenhouse effect is caused by the burning of fossil fuels and deforestation
Monday, July 13, 2015 by seirra

science
a baby pushes a toy across the floor with a force of 5 newtons inertia balanced force unbalanced force velocity
Monday, July 13, 2015 by christina

science
A 1,59 block of wood is placed on the edge of a table 1,2m above the floor.the block is stuck by a bullet,mass 0,01kg,moving @an unknown,horizontal velocity.After the impact,the bullet is embedded in the block,which falls to the floor.the block strikes the floor with a speed ...
Sunday, July 12, 2015 by Karabo

Science
use the idea of energy to explain how energy flows through food chains in the rock pool
Sunday, July 12, 2015 by Mimi

science
with the aid of a test cross, analyze the human situation where albinism a) is recessive to normal coloring (A) and explain how two parents with normal coloring could produce a child who is an albino.
Saturday, July 11, 2015 by Assatu

cjc
Science A batsman hits a cricket ball from ground level. It is caught 1.8 seconds later by the third man standing 43.4 m from the bat. The ball leaves the bat at a speed of 26m/s. Calculate how high above the ground it is caught
Saturday, July 11, 2015 by musa

Science
A man enters an elevator holding two boxes-one on top of the other. The top has a mass of 6.0 kg and the buttom box has a mass of 8.0 kg. The man sets the two boxes on a metric scale registers a value of 166N; this is the upward force upon the bottom box. Determine the ...
Saturday, July 11, 2015 by Charlotte

Science
An unbanked curve has a radius of 80.0 m. What is the naximum speed at which a car can make the turn if the coefficient of static friction is 0.8?
Saturday, July 11, 2015 by Charlotte

science
A particle starts from the origin with a velocity of 10 m/s and moves with a constant acceleration till the velocity increases to 50 m/s. At that instant the acceleration is suddenly reversed. What will be the velocity of the particle, when it returns to the starting point?
Friday, July 10, 2015 by ASSIGNMENT

maths literacy, history, travel and tourism, agric
what careers can I do with these subjects. maths lit, history, travel and tourism, life science
Friday, July 10, 2015 by mandisa

maths lit,business study,geography,english,sepedi,life science,life orientation
due to all those subjects what course can i do whn i go to university am good at all those subjects
Friday, July 10, 2015 by matome

Science
The rate law for the reaction NO + O2 > NO2 is R=k[NO][O2]. what will be the effect on the reaction rate if the partial pressure of NO is doubled? What will the effect be if the partial pressure of O2 is tripled? My answer: More NO2 would be produced if NO was doubled. If ...
Thursday, July 9, 2015 by Anonymous

Science
The combustion of methane in a laboratory burner is represented by the following equation: CH4 + 2 O2 > CO2 + 2 H2O Given the following three thermochemical equations: C + H2 > CH4 H=-74.87kJ C + O2 > CO2 H= -393.5 2 H2 + O2 > 2 H2O H=-571.6 a) Determine the molar ...
Thursday, July 9, 2015 by Mike

Science
The enthalpy change for the reaction 2 H2 + O2 > 2 H20 is -571.6 kJ. Determine the enthalpy change for the decomposition of 24.0g H2O. My Process -571.6 is the enthalpy of 2 mols of H2O. So the enthalpy of 1 mol of H2O will be -285.8. Since it's decomposition, -285.8 ...
Thursday, July 9, 2015 by Mike

science
What volume of hydrogen is evolved at STP when 2.7g aluminium. Reaches with aq NaOH???
Thursday, July 9, 2015 by Gagan sharma

Science
9. The Pleistocene Epoch, from 1.7 million years ago to 10 000 years ago, was marked by A. a lack of oxygen B. the presence of warm, tropical seas C. the southern movement of the North American continent D. the formation of glaciers that covered parts of the Northern ...
Thursday, July 9, 2015 by Emmanuel

Science
Given the following equation: N2 + Cl2 > @ NCL3 H=+230 kJ a) What mass of N2 would absorb 96.5 kJ of heat as it reacts? b) What volume of Cl2 at STP would be required to react with the N2 in part (a)? I do not know how to solve this problem. My mindset is that it involves ...
Thursday, July 9, 2015 by Anonymous

science
Once we touch mimosa plant is it possible That it will regain it's original position?
Thursday, July 9, 2015 by sanjay

science
Is it true that Synapse and Ranvier nod are same?
Thursday, July 9, 2015 by sanjay

Science
Scientists who study abnormal animal behavior would probably know much about A. Astronomy B. biology C. Geography D. History
Wednesday, July 8, 2015 by Kimberly

science
Net force of 10 newton produces an acceleration of 2mts/sec2 in a body moving over a horizontal surface . What is the mass of the body
Wednesday, July 8, 2015 by Joseph

science
Calculate the energy required to vaporize 50g of water initially at 80¡ãC. ( specific heat capacity of water- 12jgk, specific heat of vaporization- 220jk
Tuesday, July 7, 2015 by Elvis

science
what is the KE of a 0.2kg rolling ball travelling at a speed of 5m/s
Tuesday, July 7, 2015 by dianne

science
determine the time of evaporation of 250 ml of water in different envionmental conditions such as at room temperature
Tuesday, July 7, 2015 by allied school muhammad campus

Information literacy lesson 2
Which of the following sources likely has the most reliable information? A. A computer science textbook written by an expert in the field in the early 2000s B. An article in last month's issue of a peer-reviewed trade journal C. A graduate student's blog that was ...
Monday, July 6, 2015 by Bern

Science
Two balls of mass 10kgs and 100kgs are thrown vertically up at the same speed which ball will pass the point of projection in their downward direction with greater speed?
Monday, July 6, 2015 by Adithya

Science
A car runs off the road and hits a stationery rock. Some glass pieces from the windscreen are projected forward and were found at an average distance of 15 meters from the car. The average height of the windscreen is 1.5 meters. Calculate the speed of the car at the time of ...
Monday, July 6, 2015 by Jimmy

Science
Einstein put forward the mass-energy equation E=mc2. Can anybody explain why c is squared(2)?Also derive the equation give above.Thanks.
Monday, July 6, 2015 by Genius

science
A student needs to mix 50 ml. of glycine with 950 ml. of distilled water. This student has only a 25 ml. graduated cylinder. How many times will the student have to use the cylinder both glycine and water to prepare the solution?
Sunday, July 5, 2015 by BB

science
a train is moving along a horizontal track. A pendulum suspended from the roof makes an angle 4 degree with the vertical. obtain the acceleration of train?
Sunday, July 5, 2015 by aman

Computer Science
How would I put this into one program? These are the directions: Write a method that takes two parameters. If the first parameter is equal to second parameter. Multiply both and print result. If the first parameter is less than the second parameter, add the two and print the ...
Sunday, July 5, 2015 by Jake

Computer Science
I posted this question before. The assignment was: write a Java method if the first parameter is less than the second parameter add the two and print the result ten times. How do I write the result 10 times as a loop? This is what I've got but I have a ton of errors that I...
Saturday, July 4, 2015 by Trish Goal

science 207 lab wk 5
1. Which water cycle processes are represented in this model and by what components? Answer = 2. Which water cycle processes are not represented? How could the model be altered to include each of these processes? Answer = 3. How would the “weather” be affected if ...
Saturday, July 4, 2015 by Lisa

Science
A skydiver steps out of a helicopter hovering thousands of metres above ground. After 3.5 s of free fall the skydiver pulls the rip cord. What is the skydiver’s displacement during the 3.5 s of free fall?
Saturday, July 4, 2015 by Emmanuel

Science
A baseball flew 19.6 m straight up into the air after being hit by a bat. How long should it take for the ball to return from its maximum height? A. 1.02 s B. 1.91 s C. 2.00 s D. 3.99 s
Saturday, July 4, 2015 by Emmanuel

Science Help Not sure
A traffic-safety engineer is designing a deceleration lane. She is basing the length of this lane on the distance needed to slow down from 126 km/h to 65 km/h in 8.0 s. How long will the deceleration lane be? A. 2.1 x 10^2 m B. 3.8 x 10^2 m C. 4.2 x 10^2 m D. 7.6 x 10^2 m
Saturday, July 4, 2015 by Emmanuel

Science
Starting from rest, an object rolls down a long ramp with a constant acceleration of 1.72 m/s2. After rolling for 4.75 s, what is the magnitude of the ball’s final velocity? A. 9.81 m/s B. 8.17 m/s C. 6.30 m/s D. 4.09 m/s
Saturday, July 4, 2015 by Emmanuel

Computer Science
This was the assignment: If the first parameter is less than the second parameter add the two and print the result 10 times. THIS PROGRAM IS IN JAVA. I did everything but I can't figure out how to print the result as a loop 10 times. public static void main(String args...
Saturday, July 4, 2015 by Trish Goal

Science Help Not sure
Within the Gaetz Lake Sanctuary in Red Deer, Alberta, is a looped trail that is 4 km long. Suppose a person walked all the way around the looped trail in 1 h, ending where he or she started. Which statement best describes this person’s motion over this time interval? A....
Saturday, July 4, 2015 by Emmanuel

science
A vehicle is travelling 1.0x10^2 km/h. what is the spped of the vehicle in metres per second? 28m/s 27.8m/s 3.6x10^2m/s 1.0x10^4m/s
Saturday, July 4, 2015 by Emmanuel

Science
whats the difference between average speed and instantaneous speed?
Saturday, July 4, 2015 by Emmanuel

Science
1.The sound from a bolt of lighting travelled 4.08km in 12.0s. whats was the spped of the sound in metres per second? 0.340m/s 49.0m/s 340m/s 343m/s 2.A vehicle is travelling 1.0x10^2 km/h. what is the spped of the vehicle in metres per second? 28m/s 27.8m/s 3.6x10^2m/s 1.0x10...
Saturday, July 4, 2015 by Emmanuel

Basic Computer Science
This was the assignment: If the first parameter is less than the second parameter add the two and print the result 10 times. THIS PROGRAM IS IN JAVA. I did everything but I can't figure out how to print the result as a loop 10 times. public static void main(String args...
Saturday, July 4, 2015 by Trish Goal

Basic Computer Science
This was the assignment: If the first parameter is less than the second parameter add the two and print the result 10 times. THIS PROGRAM IS IN JAVA. I did everything but I can't figure out how to print the result 10 times. public static void main(String args[]) { int x1;...
Saturday, July 4, 2015 by Trish Goal

science
how many liters of water do u need to mix with a 250 grams of steric acid
Saturday, July 4, 2015 by alfred

science
A bullet strikes a uniform plank with a speed of 400ms-¹ and comes out with the half the velocity . what would be the velocity if the plank were only half thick?
Saturday, July 4, 2015 by ronit

science
a car starting from rest acquired a speed of 25ms-¹ in 10sec,after which it maintain this speed for 10sec. find (a)the acceleration (b) distance traveled during acceleration (c)total distance traveled?
Saturday, July 4, 2015 by ronit

Basic Computer Science
Write a method in Java that takes two parameters. If the first parameter is equal to the second parameter multiply both and print the result. Thanks.
Friday, July 3, 2015 by Trish Goal

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