Science

Recent Questions

Science
Sometime ago Ununseptum was discovered. However, why was element 117 not considered an element at that time?

science (chemistry)
How does salt affect the boiling point of water? (in simple words)

science
What is the name for the coil of wire around a ferromagnetic material?

science
if your doing an experiment about if sugar or salt will caused fermentation within the yeast.and you have Cup 1 with warm water ;yeast and sugar than cup 2 contains warm water:salt and yeast Finally cup 3 you have warm water and yeast will cup 3 be the control group or will ...

Science 5
The path that energy & nutrients follow is an ecosytem is called an

engineering science
calculate the work done required to push a car for 420 meters up an melon the force required to push the car is equal to 615n

Science
Which of the following is not an atom found in household bleach (Na0CL)? 1) Sodium (Na) 2) Chlorine (Cl) 3) Hydrogen (H) 4) Oxygen (O) My answer it's 4 correct me

Science
Which of the following is pure substance? Chocolates milk Orange juice Seawater Hydrogen peroxide I'm not sure what's the right answer!!

Science
A 0.44 kg mass at the end of a horizontal spring is displaced 1.5 m and released, then moves in SHM at the end of the spring of force constant 2 N/m. Find the potential energy of the system when the spring is stretched 0.9 m. The acceleration of gravity is 9.8 m/s2 . Answer in...

science
The length of an aluminium bar of length 80 cm increases by 1 mm on heating.What is the final temperature of the bar if it was initially at temperature 20 degree Celsius? (coefficient of linear expansion of aluminium =25*10-6/degree Celsius)

science
the length of an aluminium bar of length 80 cm increases by 1 mm on heating. What is the final temperature of the bar if it was initially at temperature 20 degree celsius? coefficient of linear expansion of aluminium =25*10-6/ degree celsius

management science
strasse investors buys real state , develops it,and ressels it for a profit. a new property is available ,and bud strassel, the presedent and owner of strassel investors, believes it can be sold for $160,000

Science
A 0.44 kg mass at the end of a horizontal spring is displaced 1.5 m and released, then moves in SHM at the end of the spring of force constant 2 N/m. Find the potential energy of the system when the spring is stretched 0.9 m. The acceleration of gravity is 9.8 m/s2 . Answer in...

Science
A space probe on the surface of Mars sends a radio signal back to earth a distance of 8.66x0^7 km. Radio waves travel at the speed of light (3:00x10^8 m/s . How many seconds does it take the signal to reach earth

Science
1. Glucose is a simple sugar made up of carbon, hydrogen, and oxygen. What kind of molecule is glucose? A) Glucose is protein B) Glucose is a nucleic acid*** C) Glucose is an organic molecule D) Glucose is an inorganic molecule 2. Glucose is a simple sugar. It would most ...

Science help
Is a solar powered water filter considered a innovation a solution or what?

Science
A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth

Science
Describe how changes in society's attitude toward people in wheelchairs may have led changes in the wheelchair available to people who need them.Were these changes made using science or technology or both? Thank you.

Science
How science has been used to improve the vehicles that we drive today?

Science
Which is not part of your immune system's response to a disease-causing organism? Answers: A. Vaccination B. Recognition C. Disposal D. Immunity My answer: D

science
i was ask to make an insulator cold how do i do that

science
how do i make use of matter to make an insluator

Science
I would really appreciate help! Compare renewable and nonrenewable energy sources, and discus the effects of each on biodiversity. (I need about 6 sentences) (I have tried thinking about it and cannot seem to figure it out)

science
find the gravitational force exerted by the sun on a 70 kg man located at the earth's equator a)at noon when the man is closest to the sun. b)at midnight when he is futherst from the sun. c)calculate the diferrence in gravitational acceleration due to the sun between noon (a) ...

Science
I am doing an experiment at school to make magnesium chloride. We are using Bunsen Burners, HCl acid and I am using magnesium carbonate. Would the only control variables in the experiment be the volume of acid, the acid type and the base type? Pls help asap :D

Science
Miss sue can you check these thanks. which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists...

SCIENCE ASAP HELP PLEASE
which of the following features make earth and venus similar to each other ? A . their size and mass b. their rates of rotation c. their atmospheres d. their directions of rotation****

science
How do animals find their shelter?

science
how many ml of 6M HCl solution are required to bring the pH of 10 ml of a 4M NaOH solution to 2.0

Science physic
What is the magnitude of the average force thet the athele exterts on a landing pad if it's 1.5 m high and deforms by 0.5 Mass of athele= 60kg Centre of mass is 1m

Science
What are some similarities and differences between spider food chains and snakes food chains?

science
Part A Draw a picture of an object that might impact a planet. Part B What evidence is there that these objects collide with planets and moons?

Science
How much longer will it take for sound in air to travel 10km than in water

physical science ,maths ,life science,geography
Which marks I must get to become a doctor?

Science
In humans the allele for curly hair and the allele for straight hair show incomplete dominance. If two people with wavy hair have offspring, what percentage of their offspring would you expect to have wavy hair? A.) 100% B.) 75% C.) 50% D.) 25% Would it be 50%?!

Science
1.which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the natural world a well-...

maths and science
The first term of a geometric sequence is 125÷4,the last term is 2, and the sum of the associated series is 203÷4. What is the common ratio and how many terms are there in the series?

Science
1.)Check My Answers, please? Which of the following planets is considered a rocky, or terrestrial, planet? A.)Venus **** B.)Neptune C.)Saturn D.)Uranus 2.)Which of the following statements about the beginning of the solar system is true? A.)The planets that formed closest to ...

science
If the net force on an object is 0 N, the forces are considered unbalanced. True or false?

Physical science
The density of lead is 11.35 g.cm .what will be the mass in kilograms of a 2dm sample of lead?

science
find the rotational inertia about the symmetry of axis of a thick cylinder of mass M.take the inner radius to be R1 and the outer radius to be R2

science
what kind of movement is exhibited by gas molecules

Math
A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment a. 70 ML of the 50% solution and 35 ML of the 80% solution*** b. 35 ML of ...

Health and science
What problems could a solar powered pond water filter solve and what impact would it have on people?

Health and science
Explains the science, technology, engineering and/or mathematics behind a solar cooker that work day and night and how could a solar cooker that works day ajd night both address the everyday problems and have a broader impact locally or globally.

Science
In my US History Unit test number 15 says how do layers B & D compare in age if rock layers between be and D have eroded away what is the boundary between be and D called? I cannot find a graph related to this question

Science
Which of the following best describes the result of using a catalyst in a chemical reaction? A. The yield of product is increased. B. A more desirable product is often formed. C. A greater amount of heat energy is released by the reaction. D. The reaction is completed in a ...

please help
The chart below shows the highest quiz score Cynthia received in four of her classes. Class Highest Quiz Score English 13 out of 14 correct Science 93% Math 25/27 History 0.93- In which class did she have the highest score?

Science.
Think about renewable sources of energy that are avaible. Which renable energy sources will you use: A. To heat or cool? B. To provide hot water in your home? C.to provide electricity in your home? Can you give a site on renable sources or help me understand? Because Im ...

i dont know how to solve this
The chart below shows the highest quiz score Cynthia received in four of her classes. Class Highest Quiz Score English 13 out of 14 correct Science 93% Math 25/27 History 0.93- In which class did she have the highest score?

Pure maths, Life science, tourism and geography
What are the careers that i might be able to do after school?

Science
the description of the structure of the atom is called the....

Science
I have a exam coming up,my final grade is 67% and I was wondering what would my mark have to be on my exam to overall pass with atleast 75%?

science
What would be the volume of hydrogen(2g/mol) needed in a balloon to lift a 50kg man? Assume that the temperature is 300K pressure is 1atm and air has average mass of 29 g/mol and that both gases behave ideally.

Science(physics)
A spring 20cm long is stretched to 25cm by a load of 50N. What will be its length when stretched by 100N assuming that the elastic limit is not reached? I want the answer abd solving to this question and also the formula for young modulus of elasticity

health
what education is required for dentist? Do i put answer like math, science what certain certificate do you need for this job? Do i put Bachelor's Degree?

History,life science,maths lit and geography
I wanna knw if ican become a FIRE FIGHTER with dic sub

Science
The length of an aluminium bar of lenth 80cm increase by 1mm on heating. What is the final temperature of the bar if it was initially at temperature 20°C? ( given: coefficient of linear expansion of aluminium = 25×10-6/° C)

Science
The speed of light in a plastic material is 1.4 x 10^8. What is the index of refraction of the material?

Science
Why are gender roles considered socially constructed, according to the text? (Points : 1)

philosophy
Russell is arguing that philosophy is valuable. You'll want to think about his argument using his own key ideas: •How does he think philosophy is different from science? •Does he think philosophy is different from science in a good or bad sense, like one is better than the...

Science Help
What happens to the density of the air in the balloon as it is heated?

Maths lit, geography ,agricultural science. Life science
Hi i am a grade 11 learner at khumbula senior high school , i want to know which career path do i take with this subjects ?

Maths lit, geography ,agricultural science. Life science
Hi i am a grade 11 learner at khumbula senior high school , i want to know which career path do i take with this subjects ?

math literacy,english,afrikaans,l.o,l.s,bus
Can you become a social worker with the following subjects maths literacy, english,afrikaans,life orientation,life science,business and history are can you tell u what can you become with that subjects above

science
a runner travels 3 kilometers in 30 minutes. what is the speed of the runner

maths literacy,life science,history,agricultural science
people can you plz help me what can I study after matric,anyone who could help me?

science
A cannon, mass 500kg, fires a bullet, mass 100kg, horizontally so that the velocity of the bullet is 100m.s^-1 to the right. calculate the recoil velocity of the bullet

physical science
what will the velocity be if the momentum is 60000 kg m/s and the mass of the car is 2000kg

science
A gas at atmospheric pressure is compressed isothermally to one third of its volume. What is final pressure?

computer science visual basic
I need help Application: Create a GeneratedNumber application that stores in an array with indexes 1 through 100 numbers generated by the index values when Generate is clicked. Generate the number to be stored at each index by summing the index and it's individual digits. For ...

Science
A boy moves on a skateboard at a constant velocity of 3m.s . The combined mass of the boy and the skateboard is 40kg. He catches a bag of flour of mass 5kg that is thrown to him horizontally at 6m.s . Determine the velocity of the boy after catching the bag of flour.

maths literacy, history, grography, life science
What are careers of general geography?

earth science
During the early Paleozoic era, South America, Africa, Australia, Antarctica, India, and perhaps China comprised the vast southern continent of _____. (1 point) Europe Gondwana Laurasia Pangaea

Science (physics)
How does temperature affect the gas in a balloon?

SCIENCE HELP PLS
The density of gas particles in a section of Earth’s atmosphere decreases. Which of the following is the most likely explanation for this event? The air pressure in that section of Earth’s atmosphere decreased. The air pressure in that section of Earth’s atmosphere ...

science
The following forces act on a body:f1=5,3N upwards;f2=2,2N upwards and f3=10,7N downwards.determine the resultant of the three forces using vector addition

Science
a simple machine that only changes the direction of the applied force?

Pure Maths, Life Science, CAT, Business Studies
I would like to know that with these subjects what can I study at University , so can you please help me with that?

Maths literacy and tourism,life science,geography
Hi help me I do not know what job I can do with these subjects

science
On heating 10grams copper sulphate crystals (CuSO4.5H2O),6.4 grams anhydrous sulphate was left .Find the value of X .

science
what wt. of hno3 is required to make 1lt. if 2N solution to be used as an oxidising agent 3cu+8HNO3=3cuno3+2NO+4H2O

Math literacy, Geography, Life science, Agriculture
Which career path can i follow with the subject above

science
I really need help, I don't understand the question from my science assignment. If anyone is available that would be great.

science
How much energy would be required to raise the temperature of 1.25g of water from 17 to 31 degree celsius.

Science help please.....
What happens to the density of the air in the balloon as it is heated? Also, based on this question.... What would be the Independent variable, Depended Variable, controlled Variab

science
which of the following is a constant, or control variable, in this experiment?

science
Does carbon dioxide or water have a higher boiling point and why?

Science
Without this system in the body, you would get really sick because toxins and waste would build up? (A) Cardiovascular (B) Excretory (C) Integumentary (D) Muscular I think its A, I really need this answered.

Science
What will happen when the sun is exposed to oxygen

science
Na+H2o->NaOH+H2

Science
Which of the following determines the type of biome classification that will be made for a particular region? Climate Size Mineral deposits Number of human settlements Think about how the amount of energy changes as you move stepwise from producers to primary consumers to ...

Science
Which of the following can be used to explain why fossils of the same kind of organisms can be found in different regions of the world? Biogeography Adaptation Continental drif Dispersal Which of the following would best explain why a species of wildflower native to ...

Science
Certain seismic waves travel as.. A) electromagnetic and transverse waves. B) visible light and longitudinal waves. C) longitudinal and transverse waves. D) compression and visible light waves. I have no idea I never learned this:(

Science
When the energy of a light wave is transferred to a particle and causes it to vibrate and generate heat, the energy of the light wave is.. A) absorbed B) reflected C) refracted D) transmitted D?

science
When_____forces act on an object, they cause the object to move. A. Balanced B. Unbalanced C. friction D net B?

science
Which direction will the box move in the diagram below? (Its a square in the middle and it has a long arrow pointing to it on the left side which is 5 N and then on the right side theirs a short arrow pointing to it which is 3 N) A. It will move to the left. B. It will move to...

physical science
When will the resultant of the two vectors be at a maximum?

Science
Hi if you know about static electricity can you explain how lightning strikes form? Can you think about when lightning occurs to formulate your answer to my question please. Thank you so much!!!

Physical science and math
2a^2*3a^3*b^0

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