Science

Recent Questions

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

science
a baby pushes a toy across the floor with a force of 5 newtons inertia balanced force unbalanced force velocity

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 ...

Science
use the idea of energy to explain how energy flows through food chains in the rock pool

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.

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

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 ...

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?

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?

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 ...

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 ...

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 will ...

science
What volume of hydrogen is evolved at STP when 2.7g aluminium. Reaches with aq NaOH???

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 ...

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 ...

science
Once we touch mimosa plant is it possible That it will regain it's original position?

science
Is it true that Synapse and Ranvier nod are same?

Science
Scientists who study abnormal animal behavior would probably know much about A. Astronomy B. biology C. Geography D. History

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

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

science
what is the KE of a 0.2kg rolling ball travelling at a speed of 5m/s

science
determine the time of evaporation of 250 ml of water in different envionmental conditions such as at room temperature

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 updated ten ...

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?

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 ...

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.

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?

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?

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 ...

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 can...

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 the ...

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?

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

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

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

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[]) { ...

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.The ...

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

Science
whats the difference between average speed and instantaneous speed?

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...

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[]) { ...

science
how many liters of water do u need to mix with a 250 grams of steric acid

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?

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?

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.

Science
which of the following is not scalar quantity. 0.20m 5.0m/s 10.0m/s[E] 110km/h

Science
What is the difference between convex and concave lenses??

Science
Water flows out horizontalmy at the end of a pipe at a height of 52 cm from the floor.If the horizontal distance before it hits the floor is 100 cm,calculate the velocity of the water at the instant it leaves the pipes?

Science
Water also travels through living reservoirs. Which of the following organisms does not function as a living reservoir for water? - Squirrels - Wolves - Plums - All of above are living reservoirs for water

Life science
What is food fad?

math
A reading list contains 3 historical books and 4 science-fiction books. What is the probability that Tena will randomly choose a historical book for her first report and a science-fiction book for her second?

Science
What is the difference between alcohol and phenol? Respond in detail.Thanks

Science
Can we have ph=0? Will this be considered acidic. My book says ph 1 to 7 is acidic. I wanted to make sure if ph can equal to 0 or no?

Science
At 0°c and 760mm hg pressure, a gas occupies a volume of 100cm cube. The Kelvin temperature of the gas is increased by one - fifth while the pressure is increased one and a half times. Calculate the final volume of the gas.

science
Fan can accelerate from the starting blocks to running 11 m/s down the track in 5 seconds. What is her acceleration?

Utlwanang Barolong secondary school
physical science it is found that 40 ml of a 0.5mol.dm^-3 sodium hydroxide solution is needed to neutralise 20mol of the vinegar. calculate the pH of the sodium hydroxide solution

science 207
4. What can be done to prevent mine drainage from damaging the ecosystem? Utilize at least one scholarly resource to support your suggestions.

Science
What are the reasons why human being is considered the most intelligent animal in the earth?

Science
What are the reasons why human being is considered the most intelligent animal in the whole universe?

Science
Deduce Dalton's law of partial pressure from kinetic theory

Science
if 0.75 mole of helium gas occupies a volume of 1.5. what volume will 1.2 mole helium occupy at the same teperature and pressure?

Science
0.02 mole of urea is dissolved in 250ml of solution. if density of solution is 1.10 g/ml . calculate percentage weight by weight and percentage weight by volume ?

Science
what happens to the brain as an individual grows older? a. what happens to the billions of nerve cells in the cortex as one becomes older? b. will the dead neurons be replaced? c. why is memory affected as one grows old?

Science
Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the ...

science
Design a controlled experiment to test your hypothesis, describing how you would interpret your results. Please limit your response to one paragraph

  1. Pages:
  2. <<Prev
  3. 65
  4. 66
  5. 67
  6. 68
  7. 69
  8. 70
  9. 71
  10. 72
  11. 73
  12. 74
  13. 75
  14. 76
  15. 77
  16. 78
  17. 79
  18. Next>>