Wednesday
March 4, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

Post a New Question | Current Questions

Science
An object travles 10 m in 0.07s what is its speed?
Wednesday, October 29, 2014 at 9:17am

geography,maths literacy,life science,agriculture
What kinds of jobs for my subjects
Wednesday, October 29, 2014 at 2:26am

Science
Where does a clone recieve is DNA from? My guess is two parents
Tuesday, October 28, 2014 at 7:54pm

Science
How might genetically engineered crops help people in hash climates?
Tuesday, October 28, 2014 at 7:41pm

Science please help!!
To determine the atomic mass of an element, you would take a _________ average of the isotopes that make up that element
Tuesday, October 28, 2014 at 7:11pm

English
What do you have to do afer school? 1. I have to go to my academy and study hard until 11 p.m.. 2. I have to go to an academy to study math, English and science. 3. I have to go to the academy to study 5 subjects. 4. I have to wash clothes in the washing machine. 5. I have to ...
Tuesday, October 28, 2014 at 4:20pm

Science
According to the continental drift theory, which of the following land regions should show the greatest similarities in fossil types? (1 point) A) east coast of South America and west coast of Africa B) east coast of South and west coast of South America C) northern coast of ...
Tuesday, October 28, 2014 at 1:22pm

science
how did the discovery of the electron change the atomic model? A.it disproved the earlier idea of an indivisible atom. B. it confirmed that atoms are very tiny. C.it exposed fradulent experiments conducted by unqualified scientists. D. it proved that atoms are easier to see ...
Tuesday, October 28, 2014 at 12:18pm

computer science
I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double, or ...
Tuesday, October 28, 2014 at 7:56am

Social Science
I am confused, what is the difference between basic tribunal and war crime tribunal. Thank You
Monday, October 27, 2014 at 10:31pm

Science 10
Need examples of food for Chemistry Reactions 1. Synthesis 2. Decomposition 3.Single Replacement 3. Double Replacement So for synthesis ( A + B --> AB ) I did, Macaroni + Cheese --> Mac n Cheese For Decomposition ( AB --> A + B ) I did, Dough --> Wheat + Water ...
Monday, October 27, 2014 at 8:49pm

Science 10
Here are the results of the 3 trials of dissolving equal masses of marble in hydrochloric acid listed from fastest to the slowest. List concentration, surface area, and temperature in decreasing order of their important in increasing the rate of this reaction. Trial 1 = Dilute...
Monday, October 27, 2014 at 8:01pm

science
on the moon where g=1.62m/s2 would the pendulum clock on the moon run faster or slower
Monday, October 27, 2014 at 7:54pm

science
12. Convert 11.1 liters to centiliters. A. 1,110 centiliters B. 11,100 centiliters C. 111 centiliters D. 111,000 centiliters 13. Which of the following tasks should be performed before measuring the mass of any object on a triple-beam balance? A. Make sure that the balance pan...
Monday, October 27, 2014 at 7:50pm

science
4. Convert to centimeters: 6.8 meters A. 6,800 centimeters B. 68 centimeters C. 68,000 centimeters D. 680 centimeters 5. What is the difference between a theory and an opinion? A. A theory is supported by scientific evidence, while an opinion is not. B. An opinion is supported...
Monday, October 27, 2014 at 7:50pm

science
1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original ...
Monday, October 27, 2014 at 7:49pm

Science
occurs when the moon passes between the sun and the earth, and the shadow of the moon falls on earth.
Monday, October 27, 2014 at 7:13pm

Physics Science
(a) Find the total force on the bottom of a cylindrical gasoline storage tank 15.0 m high with radius 23.0 m. (b) Find the total force on the side of the tank.
Monday, October 27, 2014 at 6:30pm

Science Physics
A pile driver falls a distance of 1.75 m before hitting a pile. Find its velocity as it hits the pile. So its 1.75x9.80=17.15?
Monday, October 27, 2014 at 5:48pm

science
1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original...
Monday, October 27, 2014 at 5:32pm

science
1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original ...
Monday, October 27, 2014 at 5:00pm

Physical Science
A 5.00 kg block of ice at –25 oC is converted to steam at 125 oC. How much energy (in kilojoules) is expended in this process? The following data are provided: a. Specific heat of ice = 2.092 J/g oC b. Latent heat of fusion = 334.72 J/g c. Specific heat of water = 4.184 J...
Monday, October 27, 2014 at 4:44pm

science
which of the following is true about the magnetic field diagram below
Monday, October 27, 2014 at 4:41pm

Physical Science
Lead is a soft, dense metal with a specific heat of 0.117 J/goC, a melting point of 328.0 oC, and a heat of fusion of 23012 J/g. How much heat (in kilojoules) must be provided to melt a 350.0 kg sample of lead that is initially at 20 oC?
Monday, October 27, 2014 at 4:37pm

Physical Science
Jill walks 1 mile everyday for exercise, leaving her front porch at 9:00 A.M. and returning to her front porch at 9:25 A.M. What is the total displacement of Jill's walk?
Monday, October 27, 2014 at 3:50pm

science
'Imagine there is a tank of unknown gas that contains 53.31% carbon, 11.18% hydrogen, and 35.51% oxygen by mass. At 35.0 °C and 0.455 bar, 2.00 L of the gas has a mass of 3.20 g. Using this information, answer the following questions. a.) What is the empirical formula ...
Monday, October 27, 2014 at 2:41pm

Science 8A Electromagnetism
Hi, Umm, can someone give me an example because I'm kind of confused. I need help! Please help me! For this portfolio, you will design an experiment to investigate the relationship between the number of coil loops and a strength of a solenoid. Once you have an experimental...
Monday, October 27, 2014 at 12:56pm

Physical Science
A hockey puck moving at 28 m/s is caught by an 80.00 kg man who was at rest. The man and the puck move together after the collision. The pucks mass is 0.16 kg. What is the final velocity?
Monday, October 27, 2014 at 10:08am

science-gen chem
if 0.969 g of CaCl2 is mixed with 1.111 g of KlO3 how many grams of solid Ca(IO3)2 can theoretically be made? CaCl2(aq) + 2KlO3(aq) ===> 2Kcl(aq) + Ca(lO3)2 (s)
Monday, October 27, 2014 at 5:35am

PLEASE HELP! SCIENCE
The system of blocks shown in the diagram below is being accelerated to the right at 4.4 m/s2 What is the applied force Small box mass- 0.10 kg Big box mass - 0.20 kg Acceleration - 4.4 m/s2 Coefficient kinetic - 0.35
Sunday, October 26, 2014 at 8:48pm

Physics(Science)
Waves on a 5.0 m rope travel at a speed of 92 m/s. If the tension in the rope is 497 N, what is the mass of the rope?
Sunday, October 26, 2014 at 3:32pm

science (Need FAST FEEDBACK!!!)
Is a density bottle the same as a pycnometer?
Sunday, October 26, 2014 at 11:05am

Science
I have a solid dissolved in water, both the same temp, and when it's put in the temperature drops. I have the heat capacity it of the solution, and need to the molar heat of the solution of the solid that was dissolved. Right now I've got: Mass of water x heat capacity...
Saturday, October 25, 2014 at 9:59pm

Science HELP!
When diving into water, it is important to look before diving to avoid (blank)damage your nervous system. A. Deep water B. Underwater hazards C. living creatures D. Water toys Is the answer B? Thanks
Saturday, October 25, 2014 at 9:27pm

Science HELP!
The part of the brain that controls movement and balance is the A. Cerbrum B. Cerebellum C. Brain stem D. Frontal lobe Is the answer B? Thanks
Saturday, October 25, 2014 at 9:23pm

Science HELP!
The body's reaction to information is to send these to the brain. A. Neurons B. Impulses C. Dendrites D. Synapse Is the answer B? Thanks
Saturday, October 25, 2014 at 9:20pm

science
what is the different between escape velocity & orbital velocity ???
Saturday, October 25, 2014 at 9:09pm

science
How many grams of CaO must be added to 50.0 mL of water to make the temperature increase from 25.0 ¡ÆC to 48.81 ¡ÆC? The reaction is CaO(s) + H2O(l) ¡ê Ca(OH)2(aq) -- ¥ÄH = -83.7 kJ Assume the heat capacity of the solution is the ...
Saturday, October 25, 2014 at 9:04pm

science
Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not
Friday, October 24, 2014 at 7:00pm

Physical Science
Consider lead, in what state will it be at each of the following temperatures? a) 4000 degrees Celsius, b) 40 degrees Celsius, c) 400 degrees Celsius, d) 327 degrees Celsius.
Friday, October 24, 2014 at 4:05pm

science
How are Newton’s second and third laws of motion important to your everyday life?
Friday, October 24, 2014 at 3:33pm

science
a horticultural wants a plant that produces flowers with a certain size color and fragrance but it now aware of any one plant having all of these traits. the quickest way she could achieve her goal would be to apply the process of_____________
Friday, October 24, 2014 at 12:42pm

science
Can anyone help me out fill in the blanks. Here are the words that will complete the whole thing: -birth -body -control -development -eggs -endocrine glands -growth -hormones -milk -production -sperm uterus contractions The pituitary gland secretes______ which____ other____ ...
Friday, October 24, 2014 at 12:10pm

science
a ladder is at rest with its upper end against a wall and the lower end on the ground .Is the ladder more likely to slip,when a man stands on it at the bottom or at the top?gove reason.
Thursday, October 23, 2014 at 11:37pm

Science
A straight line with a positive slope on a velocity-time graph indicates which of the following? no movement constant acceleration toward the reference constant velocity away from the reference constant acceleration away from the reference
Thursday, October 23, 2014 at 9:25pm

SCIENCE FOR 7TH GRADE
i need to conduct a scientific investigation and i need some ideas. Ex. " how does the amount of sunlight affect a plants growth" I need something like what is listed above. Thank you
Thursday, October 23, 2014 at 6:07pm

science
is this an example of potential energy with household item? t.v
Thursday, October 23, 2014 at 4:16pm

science
how do the instincts of migration and hibernation help animals to survive
Thursday, October 23, 2014 at 4:13pm

science
what is kinetic energy and potential energy? Can u give me an example. thank you.
Thursday, October 23, 2014 at 4:01pm

science!!
A couple has just learned that their daughter has hemophilia. They already have a son who does not have the disease. What are the genotypes of the couple? Explain your reasoning. ---------------- The gene for hemophilia is sex-linked, a recessive on the X-chromosome. The ...
Thursday, October 23, 2014 at 3:55pm

Science
A cell starts with 12 chromosomes, then goes through mitosis. How many cells are produced at the end of mitosis? How many chromosomes are in each of the cells at the end of mitoses? A cell starts with 12 chromosomes, then goes through meiosis. How many cells are produced at ...
Thursday, October 23, 2014 at 3:00pm

Int.science
An inverse relationship can be represented by: a straight line a bar chart
Thursday, October 23, 2014 at 2:23pm

science
Ralph has the same mass of 72.6 kg, and his maximum velocity is still 7.3 m/s on the swing. What is the maximum height that Ralph reaches on his swing?
Thursday, October 23, 2014 at 1:59pm

science
Ralph is also swinging at the park. He has a mass of 72.6 kg, and his maximum velocity at the lowest point in his swing is 7.3 m/s. What is Ralph’s maximum kinetic energy?
Thursday, October 23, 2014 at 1:54pm

science
Ralph is also swinging at the park. He has a mass of 72.6 kg, and his maximum velocity at the lowest point in his swing is 7.3 m/s. What is Ralph’s maximum kinetic energy?
Thursday, October 23, 2014 at 1:53pm

science
Which component of the technological system is achieved when an automobile airbag inflates?
Thursday, October 23, 2014 at 1:36pm

Int.science
The rate at which a candle burns in millimeters per minute is: qualitative theoretical quantitative hypothetical
Thursday, October 23, 2014 at 12:33pm

Int.science
The size of the chosen symbols on a graph may be used to indicate the: location of the data coordinates of the data uncertainty of the data relationship of the variables
Thursday, October 23, 2014 at 12:09pm

Int.science
The size of the chosen symbols on a graph may be used to indicate the: location of the data coordinates of the data uncertainty of the data relationship of the variables
Thursday, October 23, 2014 at 10:51am

Int.science
The rate at which a candle burns in millimeters per minute is: qualitative theoretical quantitative hypothetical
Thursday, October 23, 2014 at 10:46am

Science
What arrangement means in Science?...Thank you for your help.
Thursday, October 23, 2014 at 9:35am

Science Project: Teeth
What can I write in the discussion center of my paper in APA Style? Before doing an experiment?
Thursday, October 23, 2014 at 4:14am

Science
What arrangement means in Science?...Thank you for your help.
Thursday, October 23, 2014 at 3:38am

science
suppose some natural disaster occurs and a species of finch is forced to relocate from its original island where us dined on cactus flowers ti ab adjacent island with many fewer cacti but an overabundance of orchids. what would be the immediate consequences to the species in ...
Wednesday, October 22, 2014 at 9:54pm

science
Two toy ducks attached to each other by a string, are being pulled by a child. The front duck is m1= 5.0 kg and the back duck is m2= 2.0 kg. The happy guy pulls them with a force of 10 N and friction exists. The toys are moving with constant velocity. A) if the coefficient of ...
Wednesday, October 22, 2014 at 8:29pm

Physical Science
Beginning at rest, you accelerate at a rate of 2.5 m/s^2 for 12 seconds. What is your final velocity?
Wednesday, October 22, 2014 at 8:28pm

Science
Pleasant Beach is two meters above sea level at its highest point. If the ocean waves along the shore increase to a height of five meters, then the elevation of Pleasant Beach will most likely A.decrease to nearly zero meters B.increase to more than two meters C.decrease ...
Wednesday, October 22, 2014 at 8:07pm

Science
Contour lines that are close together always indicate steeper slopes than contour lines which are spaced farther apart Do you agree or disagree explain? I agree but I don't know how to explain
Wednesday, October 22, 2014 at 8:06pm

science
A 25mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added until the indicator changed colour. It was found that 28mL of the alkali was used. What colour was the solution in the flask at the start of ...
Wednesday, October 22, 2014 at 7:34pm

science
1. radioactive decay occurs when atoms A- lose mass * B- join with atoms of another element C- break down to form atoms of another element D- are exposed to chemical weathering 2. if you want to consult the geologic time scale for when the first vertebrates evolved, where ...
Wednesday, October 22, 2014 at 6:03pm

Physical Science
why is the kinetic energy of the lumber higher on the truck during the delivery than when it drops from the carpenter's shoulder?
Wednesday, October 22, 2014 at 5:17pm

Physical Science
Explain the role friction plays in the conservation of energy.
Wednesday, October 22, 2014 at 5:04pm

Science Density
Water has a density of 1.0g/cm3. Aperson sits in a bath 150cm in length and 90 cm width. Thw water had a depth of 60cm befor the person sat in the bath. after sitting in the bath the water level rose to 68cm. Calculate the mass of the person, giving your answer in kg.
Wednesday, October 22, 2014 at 4:47pm

Science -Density
gold has a density of 19.30 g/cm3 . What si the mass of a bar of gold 15 cm x5 cm x 8 cm
Wednesday, October 22, 2014 at 4:40pm

Science
Carbon monoxide, CO, and hydrogen, H2, react according to the reaction below. 4 CO(g)+ 9 H2(g)--> C4H10(g)+ 4 H2O(g) What volume of the excess reactant remains if 19.6 L CO and 27.2 L H2 are allowed to react. Assume that the volumes of both gases are measured at 713oC and 1...
Wednesday, October 22, 2014 at 4:34pm

Science ONE QUESTION!
Suppose the total momentum of two masses before a collision is 100 k m/s. what is the total momentum of the two masses after they collided.
Wednesday, October 22, 2014 at 4:26pm

science
Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens.
Wednesday, October 22, 2014 at 4:07pm

science
1. The process in which the chromosomes in sex cells are reproduced by half is called _____________. 2. A white mouse is crossed with a black mouse. all of the offspring were grey. The genes for fur color in mice show _________. 3. Genes are specific sections of __________. 13...
Wednesday, October 22, 2014 at 3:23pm

science
1. radioactive decay occurs when atoms A- lose mass * B- join with atoms of another element C- break down to form atoms of another element D- are exposed to chemical weathering 2. if you want to consult the geologic time scale for when the first vertebrates evolved, where ...
Wednesday, October 22, 2014 at 2:34pm

Science- Astronomy
Suppose we find a planet in another solar system that has an earth like atmosphere with plentiful oxygen but no life of any kind. Question= Is this discovery considered reasonable or surprising can you please explain? Thank you
Wednesday, October 22, 2014 at 10:30am

int.science
Which of the following is not the same as 0.00684 kg? 0.0684 dkg 6.84 g 684 cg 6,840 mg
Wednesday, October 22, 2014 at 9:03am

Science: Teeth
I'm doing a science project on how various acids affect tooth enamel. I'm planning to put the teeths in separate containers and fill 5 containers with coca cola, and 5 others with a citric acid drink. I'm also planning for two weeks to examine the teeths. What can ...
Wednesday, October 22, 2014 at 2:50am

science
why are energy transformations important for an ecosystem's stability?? PLEASE HELP IT'S DUE TOMORROW!!!!!!!!!!!!!!!!! ;)
Wednesday, October 22, 2014 at 12:05am

Need help pleas (science)
. Why are energy transformation important for an ecosystem's stability? . What is the role of photosynthesis I'm making energy "usable" for life? . What is the link between decomposition and photosynthesis? . What is the connection of energy flow through ...
Tuesday, October 21, 2014 at 11:19pm

physical science
calculate the force output by the larger piston of a hydraulic lift when a force of 700 newtons is excerted on the smaller piston and the areas of the two pistons are 20cm and 950cm squared.
Tuesday, October 21, 2014 at 10:34pm

Science!
Ernest Rutherford's atomic model included a nucleus comprised of positive particles called protons. Later, James Chadwick discovered neutrons. How did Chadwick's discovery change the atomic model? A. The new model showed a negatively charged nucleus. B. The new model ...
Tuesday, October 21, 2014 at 9:59pm

science
What is true about the element francium(Fr,atomic number 87)? Choose all that apply. a. it has 7 valence electrons b. it is likely to form ionic bonds c. it is a nonmetal d. it is in period 7 e. it is a metal Is the answer a,d,e?
Tuesday, October 21, 2014 at 9:51pm

science
Criminalists use DNA___ in crime investigations.
Tuesday, October 21, 2014 at 9:37pm

Science!
To form an oxygen molecule (O little 2) two oxygen atoms share two pairs of electrons. What kind of bonds shown below by the electron dot diagram of O little 2? Choose all that apply. Diagram . . . . O = O . . . . A. Covalent bond B. Ionic bond C. Single bond D. Double bond E...
Tuesday, October 21, 2014 at 9:35pm

Science
Similarities between decomposition and photosynthesis
Tuesday, October 21, 2014 at 8:22pm

Science
. Why are energy transformation important for an ecosystem's stability? . What is the role of photosynthesis I'm making energy "usable" for life? . What is the link between decomposition and photosynthesis? . What is the connection of energy flow through ...
Tuesday, October 21, 2014 at 7:35pm

Science
. Why are energy transformation important for an ecosystem's stability? . What is the role of photosynthesis I'm making energy "usable" for life? . What is the link between decomposition and photosynthesis? . What is the connection of energy flow through ...
Tuesday, October 21, 2014 at 5:03pm

Science
Suppose you were testing the boiling temperature of several liquids.how would you use numbers in your investigation?
Tuesday, October 21, 2014 at 4:56pm

Science!
Which is most likely to be part of an ionic bond? A. An atom with no valence electrons B. An atom with one valence electron C. An atom with two valence electrons D. An atom with three valence electrons Is the answer B?
Tuesday, October 21, 2014 at 4:39pm

science
Which of the following statements is true? A. An object that is accelerating is always changing direction. B. An object that is accelerating is always changing speed. C. An object at rest has an instantaneous acceleration of zero. D. Instantaneous acceleration is always ...
Tuesday, October 21, 2014 at 2:18pm

Science
What arrangement means in Science?...Thank you for your help.
Tuesday, October 21, 2014 at 2:06pm

science
Which one of the following games would most readily flow along the ground if accidentally released? 1.chlorine 2.ethyne 3.helium 4.hydrogen 5.nitrogen
Tuesday, October 21, 2014 at 1:51pm

Homework (Science)
A ball is thrown straight upwards at a speed of 32.5 m/s and from a height of 1 m above the ground. How long before it hits the ground?
Tuesday, October 21, 2014 at 9:06am

Science
Science project ideas for science fair. I need to prepare a model for science fair. But I need some ideas about the major problems facing today's world. So that I can get idea for improvement in any area and to show this in science fair. Please get me know about the ...
Tuesday, October 21, 2014 at 4:20am

Science
1. How might sexual reproduction decrease an organism’s chance of survival? A)If the offspring inherits a genetic combination that includes a harmful trait, it could decrease the organism’s chance of survival. ***** B)If the offspring inherits the exact same genetic ...
Tuesday, October 21, 2014 at 3:54am

Pages: <<Prev | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | Next>>

Post a New Question | Current Questions

Members