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August 1, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

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 by Anonymous

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 by baby boo

science
Which component of the technological system is achieved when an automobile airbag inflates?
Thursday, October 23, 2014 by yaya

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

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 by Casey

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 by Hank Hill

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

Science
What arrangement means in Science?...Thank you for your help.
Thursday, October 23, 2014 by Damian

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 by ren

Science
What arrangement means in Science?...Thank you for your help.
Thursday, October 23, 2014 by Damian

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 by Anonymous

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 by Anonymous

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 by Sylvia

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 by M

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 by M

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 by Stanley

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 by anonymous

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 by Lindsey

Physical Science
Explain the role friction plays in the conservation of energy.
Wednesday, October 22, 2014 by Lindsey

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 by Jess

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 by Jess

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 by Alex

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 by <3 <3

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 by Marylyn

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 by dani

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 by anonymous

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 by Junior

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 by Harry Potter

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 by ren

science
why are energy transformations important for an ecosystem's stability?? PLEASE HELP IT'S DUE TOMORROW!!!!!!!!!!!!!!!!! ;)
Wednesday, October 22, 2014 by Gege

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 by Sofia (bizz)

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 by sara

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 by blue

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 by Anonymous

science
Criminalists use DNA___ in crime investigations.
Tuesday, October 21, 2014 by Madie

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 by blue

Science
Similarities between decomposition and photosynthesis
Tuesday, October 21, 2014 by Sofia (bizz)

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 by Sofia (bizz)

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 by Bizz

Science
Suppose you were testing the boiling temperature of several liquids.how would you use numbers in your investigation?
Tuesday, October 21, 2014 by Katelynn

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 by blue

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 by LovelyCaity

Science
What arrangement means in Science?...Thank you for your help.
Tuesday, October 21, 2014 by Damian

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 by yoli

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 by Laya

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 by Edd

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 by Kenzie

science
1) a pea plant with yellow seeds is crossed with a pea plant with green seeds. all of the offsprings have yellow seeds. the allele for yellow sees is a. Dominate because all offspring have yellow seeds. b. Recessive because all of the offsprings have yellow seeds. c. dominant ...
Tuesday, October 21, 2014 by dani

Science Help
It’s the night of the BIG homecoming dance and you just can’t wait. You think you have everything planned perfectly! On your way to the dance though there is some slow driving JERK in front of you so you slam on the gas going from 30. mi/hr to 60. mi/hr. Luckily your...
Monday, October 20, 2014 by Micky

Science
1.) Robin hood shoots an arrow up in the night sky. What is the acceleration at the very top of its path? 2.) Juan's car has an acceleration = -2.76m/s^2 and a velocity = 43m/s. Is he slowing down or speeding up?
Monday, October 20, 2014 by Candy

science-chemistry
An aqueous solution of ammonium nitrite decomposes when heated to give off nitogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was colleced over water at 25˚C ...
Monday, October 20, 2014 by Sean

science
what does nuclear energy mean and can you give me a example of what it is?
Monday, October 20, 2014 by layla

Physical Science
A long distance swimmer, who is very cold, m=100 kg., 1000 kilocalories are supplied to warm them up. The specific heat for a human is 0.83. A) What will be the temperature change? B) If the original temperature is 85 degrees, find the final temperature.
Monday, October 20, 2014 by Bonni

Physical Science
A piece of aluminum, mass 40 kg. C= 0.2 kilocalories/kg.(degrees), change in temperature =20degrees, find Q, in kilocalories.
Monday, October 20, 2014 by Bonni

science
why is all Florida at risk for damage from hurricane winds?
Monday, October 20, 2014 by Eden S.

Physical Science
The sand on the beach heats up faster each day than the water does. You know this because when you walk on the beach in the early morning, your feet are cool. By noon, the beach is so hot, you cannot walk on it in bare feet . The ocean, however stays cool. Which one has the ...
Monday, October 20, 2014 by Bonni

PS.225 SCIENCE
NARRATIVE DNA
Monday, October 20, 2014 by KOMOLA

Science
Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. 61,103 = _____ 6.11 x 104 6.1103 x 104 6 x 104
Monday, October 20, 2014 by Harry Potter

Science
The number 7.325 rounded off to three significant figures is 7.32 7.30 7.33
Monday, October 20, 2014 by isaac clarke

PLZ HELP.( INT. SCIENCE)
Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. 0.01325 = _____ 1.325 x 10-2 1.0 x 10-2 1.3 x 10-2
Monday, October 20, 2014 by isaac clarke

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 would ...
Monday, October 20, 2014 by anonymous

int.science
Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. (1.8 x 10-2) ÷ (9 x 102) = _____ 2 x 10-5 2.0 x 10-5 0.2 x 10-4
Monday, October 20, 2014 by isaac clarke

science
How to do an outline investigation plan?
Monday, October 20, 2014 by anonymous

science
You are running from a zombie with a velocity of 2.5 m / s. If you run for 1500 meters and have a mass of 61.4 kg, how much work have you done?
Sunday, October 19, 2014 by connie

Math/Science
Three bullets are fired simultaneously by three guns aimed toward the center of a circle where the bullets mash into a stationary lump. The angle between the guns is 120°. Two of the bullets have a mass of 9.30 10-3 kg and are fired with a speed of 440 m/s. The third ...
Sunday, October 19, 2014 by Anonymous

Physics
In a science fiction novel two enemies, Bonzo and Ender, are fighting in outer spce. From stationary positions, they push against each other. Bonzo flies off with a velocity of +2.2 m/s, while Ender recoils with a velocity of -2.9 m/s. Determine the ratio mBonzo/mEnder of the ...
Sunday, October 19, 2014 by Sanz

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 would ...
Sunday, October 19, 2014 by anonymous

science
What is the visual reaction when CuSO4 and NaCO3 is combined? I know what to do, I just forgot the info at school and I need this done by tomorrow. I would prefer to figure it out on my own but I don't have the chemicals at my house and I can't find anything online to ...
Sunday, October 19, 2014 by Anonymous

science
I did the work for this lab but forgot to record the data. It was a double displacement of CuSO4 and NaCO3. If someone could help me with the visual reaction that would help me out a lot. I know what to do I just don't remember what happens.
Sunday, October 19, 2014 by Teegan

science
what force is applied by Andre if he does 250 J of work as he pushes a box 19 M along the ground ?
Sunday, October 19, 2014 by anna

Science Help
1.) A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10-2 s, but in that time it goes from rest to a velocity of 4.00×103 m/s. What is the ...
Saturday, October 18, 2014 by Kenny

Computer Science
Write a program to compute an employee’s weekly pay and produce a pay slip showing name, gross pay (i.e. pay before deductions), deductions, and net pay (i.e., pay after deductions).
Saturday, October 18, 2014 by Christopher

science
all alkalies are bases but all bases are not alkalies
Saturday, October 18, 2014 by brad

Materials Science
A hollow cylinder with outer radius r0 and inner radius ri is loaded by a uniformly distributed load q across its length L. The beam is supported by a roller at its left end and a pin L5 from its right end. What is the maximum bending moment in the beam? Express your answer in...
Friday, October 17, 2014 by qwerty

Materials Science
A 4-point bending test is performed on the same beam, with symmetric loads of 5kN separated by 2m. Draw the bending moment and shear force diagrams for the beam. Then answer the following questions about the shear force V and bending moment M. What is the shear force in the ...
Friday, October 17, 2014 by qwerty

Materials Science
A 3-point bending test is performed on a simply supported beam of length L=4m and of rectangular cross-section, with width b and height h. For a central load of 10kN, draw the bending moment and shear force diagrams for the beam. Then answer the following questions about the ...
Friday, October 17, 2014 by qwerty

science
The muscular system is essential because it allows our bones to A. Strength B. Contract C. Lengthen D. Move Is the answer is D? Thanks.
Friday, October 17, 2014 by blue

Science
Which of the following best explains why it is necessary for the body to eliminate waste?
Friday, October 17, 2014 by Caitie Cat

Science
What conclusion can be drawn about the relationship between the arrangement of elements on the periodic table and the patterns observed in their priorities? A. Properties of elements are related to atomic numbers. B. Properties of elements are related to ductility. C. ...
Friday, October 17, 2014 by blue

science
how fast is mach 1 ?
Friday, October 17, 2014 by kenneth

Science PLEASE HELP!
Why is Lithium more reactive than Neon? I honestly do not understand this.
Friday, October 17, 2014 by Bayleigh C

science
Would somebody be so kind and help me with my homework,please?Explain, how a substance will dissolve differently if the temperature changes. Thank you for help.
Friday, October 17, 2014 by Damian

science
an elephant of mass 500kg stands with all four feet on the ground. each foot has an area of 0.08m^2.calculate the pressure exerted on the ground.[g=10m/s^2]
Friday, October 17, 2014 by kwame

science
can you tell me the relationship between water treatment and geckos
Friday, October 17, 2014 by mark

Science
Two football players collide head-on in midair while chasing a pass. The first player has a 100 kg mass and an initial velocity of 4.00 m/s in the positive x direction, while the second player has a 130 kg mass and initial velocity of 3.30 m/s in the negative x direction. What...
Thursday, October 16, 2014 by Anonymous

science
what are 3 examples for sodium
Thursday, October 16, 2014 by t aylor

Science Help Urgent!!!!!
A particular neutral uranium atom has 92 protons, 143 neutrons, and an atomic mass of 235. How many electons does the atom have? a. 92 b. 143 c. 235 d. 337 Is the answer A?
Thursday, October 16, 2014 by Frazzled

science help
A praticular neutral uranium atom has 92 protons,143 neutrons, and an atomic mass of 235. How many electrons does the atom have? A. 92 B. 143 C. 235 D. 337 Is the answer D? Thanks
Thursday, October 16, 2014 by happy

science help
What would happen to the current model of the atom if new information about its structure is discovered in the future? A. The current atomic model would be revised. B. The current atomic model would be strengthened. C. The current atomic model would be proven. D. The current ...
Thursday, October 16, 2014 by happy

Materials Science
Calculate the ratio of the moments of inertia I1I2 of two beams of rectangular cross section of the same width, one with a height h and the other, made up of three thinner beams of height h/3. I1/I2 = ?
Thursday, October 16, 2014 by qwerty

Materials Science
A 3m long balance beam is simply supported with an overhang at each end of a=0.5m. A gymnast weighing 50kg is standing a distance c to the right of support A and a distance b to the left of support B. How does the maximum bending moment in the beam depend on the distance c? ...
Thursday, October 16, 2014 by qwerty

Science-Physics
A fireworks rocket explodes at height h, the peak of its vertical trajectory. It throws out burning fragments in all directions, but all at the same speed v. Pellets of solidified metal fall to the ground without air resistance. Find the smallest angle that the final velocity ...
Thursday, October 16, 2014 by Anonymous

Science
Explain the forms of energy: radiant, chemical,mechanical,electrical, and thermal
Thursday, October 16, 2014 by Bizz

Science
What is energy. Give short definition and give an example
Thursday, October 16, 2014 by Bizz

science help
Chromosone pairs contain diffrent versions of genes, which are called? A.alleles B.chromosome C.mitosis D.DNA E.RNA F.diploid G.meiosis H.phenotype Is the answer A??
Thursday, October 16, 2014 by happy

Science
.Define the following terms and provide a example of each: -atom, - compound, - element, -energy, - photosynthesis, -matter, - decomposition. Write it in your own words. . Explain the forms of energy: radiant, chemical, mechanical, electrical, thermal. . What is a food chain...
Thursday, October 16, 2014 by Taylor

science
If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred at 0 years on the horizontal axis? Graph: the vertical axis is showing the percentage of radioactive element remaining. The values on the vertical axis are 0 (origin), 25, 50, ...
Thursday, October 16, 2014 by SkatingDJ

Science
Would somebody be so kind and help me with my homework,please?Explain, how a substance will dissolve differently if the temperature changes. Thank you for help.Kinga
Thursday, October 16, 2014 by Kinga M.

Science
Explain, how a substance will dissolve differently if the temperature changes. Thank you for help.Kinga
Thursday, October 16, 2014 by Kinga M.

Science-Physics
A car is moving at a constant 19.3m/s, and rain is falling at 8.9 m/s straight down. What angle does the rain make with respect to the horizontally observed by the driver?
Thursday, October 16, 2014 by Anonymous

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