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December 22, 2014

Homework Help: Science

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Recent Science Questions

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computer science programming
Elements – sequence-series outputting Write a program that prints the following elements: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, (hereto referred to as elements) etc., up till a user-entered value. The program should not print more than 10 numbers per line. The last line ...
Thursday, October 9, 2014 at 6:05am

science
1.Darwin assumed that evolutionary change was always slow and gradual. What was the first evidence that suggested evolution change might happen fast sometimes? A. Homologous structures B. Fossils*** C. Reproduction rates D. DNA sequences 2.Which of the following provides ...
Thursday, October 9, 2014 at 1:42am

Science Physics
On the surface of the Moon an astronaut has a weight of Fg = 120 N. The radius of the Moon is Rm = 1.74 x 106 m, the gravitational constant is G = 6.67 x 10-11 N m2kg2 and the mass of the Moon is Mm = 7.35 x 1022 kg. Solve numerically for the mass of the astronaut ma in kg
Thursday, October 9, 2014 at 12:10am

Science
What is the genetic code? A. The order of amino acids in proteins makes up the genetic code. B. The order of amino acids in mRNA makes up the genetic code. C. The order of nitrogen bases in tRNA make up the genetic code. D. The order of nitrogen bases in DNA makes up the ...
Wednesday, October 8, 2014 at 10:38pm

science
The total energy of motion in the molecules is called POTENTIAL ENERGY. TEMPERATURE is the average amount of energy of motion in the molecules of a substance. A THERMOMETER is a thin glass tube with a bulb on one end that contains a liquid,usually mercury or colored alcohol. ...
Wednesday, October 8, 2014 at 10:16pm

Science
If one rabbit had brown fur and another has black fur, what conclusion can you draw about the rabbits' genetic codes? A. The order of bases in the section of DNA that codes for fur color in the brown rabbit cannot be read by mRNA. B. The genetic code of the rabbit with ...
Wednesday, October 8, 2014 at 10:15pm

Science
How do mRNA and tRNA work together to make proteins? A. tRNA carries the instructions coded in mRNA to the ribosomes where mRNA decodes DNA to make proteins. B. mRNA carries the instructions coded in tRNA to the ribosomes where mRNA decodes DNA to make proteins. C. mRNA ...
Wednesday, October 8, 2014 at 10:00pm

science
How is a single replacement reaction different from a double replacement reaction? I am having trouble telling which on is which.
Wednesday, October 8, 2014 at 9:57pm

Science
What is the genetic code? A. The order of amino acids in proteins makes up the genetic code. B. The order of amino acids in mRNA makes up the genetic code. C. The order of nitrogen bases in tRNA make up the genetic code. D. The order of nitrogen bases in DNA makes up the ...
Wednesday, October 8, 2014 at 9:37pm

science
The total energy of motion in the molecules of a substance is called? ?is the average amount of energy of motion in the molecules of a substance. A ? Is a thin glass tube with a bulb on one end that contains a liquid usually mercury or a colored alcohol. The energy transferred...
Wednesday, October 8, 2014 at 9:06pm

science
A 3.70 L sample of neon at 11.24 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 5.24 atm after the neon is added, what was the original pressure (in atm) of argon in the cylinder?
Wednesday, October 8, 2014 at 8:11pm

science
what is paper chromatography
Wednesday, October 8, 2014 at 5:52pm

Science
Cottage roof timber from Ireland. Date: 906 ± 35 years. What is the BP Date?
Wednesday, October 8, 2014 at 5:50pm

Science
Pleistocene mammoth bone from La Brea Tar Pits of Los Angeles, California. Age: 12,200 ± 35 years. What the BP Date?
Wednesday, October 8, 2014 at 5:48pm

Science
How does DNA determine a trait such as eye color? A. DNA codes for proteins that determine eye color. B. DNA code for mRNA that detemines eye color. C. DNA interacts with proteins to control eye color. D. DNA contains pigments which make up eye color. Is the answer D? Thanks a...
Wednesday, October 8, 2014 at 5:45pm

science
what is the centeraltheme of the ' As Cheap as Coal" portion in Section 8 . 1 of your text. (Point: 1 ) The cost of renewable energy is too high for massive adoption with U. S. The cost of renewable energy is currently about the same or less than traditional coal ...
Wednesday, October 8, 2014 at 3:04pm

SCIENCE
how is newton's first law used in everyday situations
Wednesday, October 8, 2014 at 1:37pm

Science 8
How are Newton’s second and third laws of motion important to your everyday life? Please help me! I've looked everywhere and I can't seem to find an answer.
Wednesday, October 8, 2014 at 11:08am

science
1.)a basketball momentarily changes shapes as it bounces off the floor. this is due to balanced forces acting on the ball. True (answer) false 2.) a ball slowing down as it roles across the carpet is an example of what ? (1 point) a.)balanced force b.)friction ( answer ) c.)...
Wednesday, October 8, 2014 at 9:38am

Science
What kinds of materials tend to be conductors? Insulators?
Wednesday, October 8, 2014 at 9:24am

Science
Food and beverages examples for phosphoric acid?
Wednesday, October 8, 2014 at 4:03am

Soil Science, HELP!!
Given the following soil properties, find the % of water by weight at soil saturation with water: Moist sample weight: 202.16 Oven dry sample weight: 197.8 Bulk Volume:118.86 Particle Volume Density: 73.73 Soil bulk density: 1.66 soil particle density: 2.68 % pore space: 38.06...
Wednesday, October 8, 2014 at 2:21am

Soil Science!
Given the following soil properties, find the % of water by weight at soil saturation with water: Moist sample weight: 202.16 Oven dry sample weight: 197.8 Bulk Volume:118.86 Particle Volume Density: 73.73 Soil bulk density: 1.66 soil particle density: 2.68 % pore space: 38.06...
Tuesday, October 7, 2014 at 11:54pm

Science
How do you define a controlled experiment?
Tuesday, October 7, 2014 at 10:31pm

Math
Carter got the following scores on Science tests: 78,82,88,90,93. What is the mean deviation?
Tuesday, October 7, 2014 at 9:35pm

Earth Science
Unlike most road maps, topographic maps can be used to find 1: the best route to a town 20 km away. 2: the temperature at any place on the map 3:the elevation above sea level. 4:the distance between two locations
Tuesday, October 7, 2014 at 6:56pm

Science
make an observation of food waste occurring in your home and write at least two sentences describe the waste that has occurred.
Tuesday, October 7, 2014 at 6:48pm

Science
Identify the process that represents how organisms grow and replace old are damaged cells. My answer: This process is called mitosis. Am I correct?
Tuesday, October 7, 2014 at 5:42pm

Science--2 questions! asap!
During the processes of erosion and deposition, sediments that are the_____ in size will be carried the greatest distances before being deposited. Most___rocks form under conditions found a few kilometers under Earth's surface.
Tuesday, October 7, 2014 at 5:40pm

science
Astronomers think planets formed from interstellar dust and gases that clumped together in a process called _____. stellar evolution nebular aggregation planetary accretion nuclear fusion
Tuesday, October 7, 2014 at 2:54pm

science 1 question
A student measures a rectangular room to be 20.0m x 17.16m. Which of the numbers below represents the room's area with the correct number of significant figures? 340m^2 343m^2 343.2m^2 343.20m^2 the correct answer is c but it says sig fig so is it b??? im having trouble ...
Tuesday, October 7, 2014 at 2:48pm

Please help science
A scientist observes that termites are fed a certain antibiotic die a starvation after a few days. The scientist also notices that certain protists that live inside the termites guy are affected by the antibiotic in a peculiar way: although the protists continue to thrive , ...
Tuesday, October 7, 2014 at 10:42am

Science urgent help
A scientist observes that termites are fed a certain antibiotic die a starvation after a few days. The scientist also notices that certain protists that live inside the termites guy are affected by the antibiotic in a peculiar way: although the protists continue to thrive , ...
Tuesday, October 7, 2014 at 1:23am

physical science
using the cinetic theory explain what caused gas pressure
Monday, October 6, 2014 at 8:55pm

physical science
A piston applies a pressure of 5,000 N/m2 if the piston has a surface area of 0.1 m2 , how much for can the piston apply?
Monday, October 6, 2014 at 1:58pm

Science pplzzz!!
Which of the following is true about rocks? Rocks are composed of only one mineral. Rocks do not contain any nonmineral matter. Coal is not considered a true rock. Most rocks are a mixture of minerals. 2. If granite undergoes high temperatures and high pressures within Earth, ...
Monday, October 6, 2014 at 9:44am

environmental science
slogan about water conservation
Monday, October 6, 2014 at 5:59am

physical science
A 2-kg ball of putty moving to the right has a head-on inelastic collision with a 1-kg putty ball moving to the left. If the combined blob doesn’t move just after the collision, what can we conclude about the relative speeds of the balls before they collided?
Monday, October 6, 2014 at 2:03am

Science
Can you get results from observations? Can you still get results from doing only small amounts of experiments?
Sunday, October 5, 2014 at 10:10pm

SOC 101
Checking my Answers: 1. The Sociological insight can provide which of the following: (Points : 1) Knowledge of group behavior Insight into individual behavior Increased understanding of differences *All of these choices Question 2. 2. Which is the best type of literature for ...
Sunday, October 5, 2014 at 8:12pm

Science
We are having a debate in Science class. We are each given two questions to debate each other. 1. The Climate is mainly influenced the by the sun? 2. The earth has been warmer in the past?
Sunday, October 5, 2014 at 4:33pm

Science--3 questions.
1. Which of the following is not considered to be a rock? coal sandstone pumice lava 2. Which of the following is not one of the three types of rock? igneous magma sedimentary metamorphic 3. The three types of rocks are classified by _____. color grain size chemical ...
Sunday, October 5, 2014 at 3:13pm

Science help!
Compounds with high melting points have _____. covalent bonds metallic bonds ionic bonds no chemical bonds 4. Which of the following is NOT a characteristic of minerals? crystalline structure formed by inorganic processes definite chemical composition either liquid or solid
Sunday, October 5, 2014 at 2:42pm

science
During the process of photosynthesis, plants capture the kinetic energy of moving photons and transform it into potential energy in the form of Select one: a. pyruvate. b. chemical bonds. c. stroma. d. thylakoid disks.
Sunday, October 5, 2014 at 2:37pm

science
The muscles of a very active organism would contain more mitochondria than the muscles of a less active organism. Select one: True False
Sunday, October 5, 2014 at 2:30pm

science
The outcome of the Calvin Cycle is A)synthesis of sugars B)Production of pyruvate C)Capture of energy from sunlight D)Breakdown of complex molecules and the subsequent release of energy
Sunday, October 5, 2014 at 2:28pm

science
Krebs Circle produces A)NADH and Carbon Dioxide B)ADP and NADP C)Acytol CoA and sugars D)Water and Carbon Dioxide
Sunday, October 5, 2014 at 2:19pm

science
what is a adaptation
Sunday, October 5, 2014 at 3:59am

science
An electron drop to what energy level is likely to emit a photon in the infrared region?
Saturday, October 4, 2014 at 11:01pm

science
a base jumper jumps from a height of 2500m, after 2.5s how fast was he traveling
Saturday, October 4, 2014 at 10:19pm

Science
When you see lightning strike, you probably wil see thunder soon. Is this theory or law? I think its theory, what do you think
Saturday, October 4, 2014 at 4:26pm

HELP!
is nursing a science major?
Saturday, October 4, 2014 at 3:37pm

Science
How fast will A 0.15kg baseball accelerate if a batter hits the ball with a force of 420Newtons?
Saturday, October 4, 2014 at 2:10pm

Intro to Physical Science
Lucy the elephant jumps straight up from ground level with a speed of 6 meters/second. With what speed will she have just before she reaches the ground on her way back down? With no friction and then with friction.
Saturday, October 4, 2014 at 11:46am

science
A “Set” within quantitative theory represents…?
Saturday, October 4, 2014 at 1:07am

Science
Which of the following is not part of the cell theory? (1 point) Cells are the building blocks of life. All living things are made up of cells. All cells are created from other cells through cell division. The nucleus is the control center of the cell. 3. Dust mites are ...
Saturday, October 4, 2014 at 12:38am

science
An object of mass m is thrown vertically upwards.At what rate will its momentum change?
Saturday, October 4, 2014 at 12:20am

Science
which term best describes the role carbon plays in the structure of compounds present in living things? A- a somewhat important role B- a fundamental role C- a minimal role I think it B.
Friday, October 3, 2014 at 11:01pm

Science
What best explains why carbon is present in so many kinds of molecules? A- It is abundant on earth B- It can form four covalent bonds C- It has valence electrons D- It can become ion I think it is B, however, I am unsure!
Friday, October 3, 2014 at 10:44pm

Int. science
Jose times how long sugar takes to dissolve in warm water. He conducts four trials of his experiment. What should he conclude from his data? Time: trial 1 30 seconds trial 2 32 seconds trial 3 10 seconds trial 4 29 seconds Sugar does not dissolve in water. The time recorded ...
Friday, October 3, 2014 at 10:33am

programing
1. Elements – sequence-series outputting Write a program that prints the following elements: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, (hereto referred to as elements) etc., up till a user-entered value. The program should not print more than 10 numbers per line. The last line ...
Friday, October 3, 2014 at 3:47am

Science
why is burning magnesium an irreversible reaction?
Friday, October 3, 2014 at 1:54am

Science
Explain the following quote: ... it was several weeks before an emigrant from Earth could adapt to it. On the Moon the human body had to learn a whole set of reflexes. It had, for the first time, to distinguish between mass and weight. A man who weighed one hundred eighty ...
Thursday, October 2, 2014 at 10:45pm

Earth Science - Please Check 4 Answers
Please help me with the following questions: 2. Which type of information is best represented by a chart? A. the sequence of chemical reactions in photosynthesis B. the percentage composition of gases in car exhaust C. the rate of carbon dioxide production during exercise D. ...
Thursday, October 2, 2014 at 7:12pm

Science
Find the mean time for each ramp length Mean 3.6s Find the ball's acceleration for each mean time using the equation below where D is distance or ramp length and T is time Acceleration=2D/T^2 1.5m(Distance) Use 3.6
Thursday, October 2, 2014 at 7:01pm

Science
A 2kg ball at rest experiences two forces The force on the left is 13.2 N and the force on the right is 15.4 N Calculate the net force in newtons on the ball as it moves to the left. Subtract 15.4 and 13.2?
Thursday, October 2, 2014 at 6:40pm

Science
glass bottles in a recycling plant move along a conveyor belt up to a crushing machine at a constant speed of 0.5 what statement is true about the net force on the bottles as they move A. The force on the bottles are balanced B.The forces on the bottles are unbalanced C.The ...
Thursday, October 2, 2014 at 6:29pm

Science
Calculate What is the net force on the box if it's 15N going to the left and 10N going to the right? HOw will the unbalanced forces change the direction of the box
Thursday, October 2, 2014 at 6:21pm

Science
When a nonzero net force acts on an object the force A.changes the motion of the object B.Must be greater than the reaction force C.Does not change the motion of the object D.is equal to the weight of the object
Thursday, October 2, 2014 at 6:20pm

Earth Science - Please Check My Answer
Please help with the following: Dani wants to measure the volume of a pebble. Which tool will give the most accurate measurement? A. a ruler B. a tablespoon C. a measuring cup D. a graduated cylinder I think the answer is mostly D. Is this correct? Please help me by checking ...
Thursday, October 2, 2014 at 6:03pm

Sociology
Societies norms, values and beliefs are enforced through internalization and sanctions (Points : 2) true or false An example of a positive informal sanction is when a parent gives a student praise for doing well on a test. (Points : 2) true or false Emile Durkheim was ...
Thursday, October 2, 2014 at 3:39pm

Science--3 questions? :c
15. The___hypothesis suggests that our solar system evolved from a huge rotating cloud of dust and gas. 16. Lines of____are used to measure distances east or west of the prime meridian in degrees. 17. The major difference between a topographic map and other maps is that a ...
Thursday, October 2, 2014 at 2:46pm

Science
1.)When evaluation was first processed which of the following was used as evidence to suport the idea (1 point) a.)observations of nature**** b.)laboratory experiments c.)extensive fossil collections b.)genetic sequence 2.)a farmer sprays insecticide on his crops and notices ...
Thursday, October 2, 2014 at 2:33pm

Science help?
On the global grid, the prime meridian is at _____. 0 degrees latitude 90 degrees latitude 0 degrees longitude 90 degrees longitude
Thursday, October 2, 2014 at 2:30pm

science
please check my answers:)1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of ...
Thursday, October 2, 2014 at 12:01pm

science
A hypothesis _____. must be tested is supported by large amounts of data is accepted by the scientific community must be proven true for an experiment to be worthwhile
Thursday, October 2, 2014 at 11:24am

Int.science
Which of the following statements is true? A hypothesis is created at the end of an experiment. The dependent variable is changed by the experimenter. The best hypotheses are written as answers to a question. Observations are often used to form questions about the world
Thursday, October 2, 2014 at 11:14am

Int. science
The creation of graphs usually occurs during _____. data analysis data collection observation questioning I think it might be B
Thursday, October 2, 2014 at 10:44am

Int. science
Which of the following is an example of a cycle theme in science? seasons electrons and protons the solar system relationship between plants and animals
Thursday, October 2, 2014 at 10:37am

science
The chemical formula for copper sulfate pentahydrate is CuS4°H2O. Based on your observations, what do you think happens to this formula when the crystals are heated? In assuming that the answer has something to do with the h2o because when it's heated it becomes ...
Thursday, October 2, 2014 at 10:21am

Intro to Physical Science
A diver (mass 100kg.)drops from a height of 12 meters and reaches the pool below at ground level. 3550 joules of heat energy are generated due to friction. With what speed will the diver hit the water?
Thursday, October 2, 2014 at 9:57am

Science
1. The process of nitrogen fixation uses oxygen to produce carbon dioxide- false? 2. While a pyramid of numbers or biomass can be inverted, a pyramid of energy cannot- false? are my answers correct?
Thursday, October 2, 2014 at 3:04am

Political science
Given the concerns of national Republican leaders, why is immigration reform having such a hard time winning a majority of Republican votes in the House?
Wednesday, October 1, 2014 at 11:34pm

Political science
Given the concerns of national Republican leaders, why is immigration reform having such a hard time winning a majority of Republican votes in the House? We were supposed to use data we found - we had to find the population percentage of Latinos in every republican represented...
Wednesday, October 1, 2014 at 11:17pm

Science urgent help please:)
Compare the forms of locomotion used by the 4 phyla of animal like protists? Describe the process of conjunction . Is conjunction a form of reproduction? Explain In what ways are animal like protists helpful to other living things?
Wednesday, October 1, 2014 at 10:34pm

7th grade Science
Can you check my answer below, please? Elizabeth did an experiment to test the effect of salt water on rusting rate of a nail. She put 3 nails in the same bowl of salt for one week. How could she improve her experiment? Ans: 1) place each nail in a separate bowl with different...
Wednesday, October 1, 2014 at 10:16pm

science, chemistry, biotechnology
"You're creating a standard curve for pyruvate. You need to create a standard with 20 micromoles in a cuvette. How much 100 mM pyruvate would you need?" My understanding is to solve for VOLUME using the equation: micromoles = (mM)(volume in ml) 20 micromoles = (...
Wednesday, October 1, 2014 at 9:25pm

Science quick question
bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless
Wednesday, October 1, 2014 at 8:57pm

Science
Describe the changing definitions of an element?
Wednesday, October 1, 2014 at 5:51pm

science
1) Which of the following is a valid reason why a scientist might reject a scientific theory? (1point) Some people disagree with it. It covers too broad a topic. New evidence contradicts it.*** It is too old. 2) A scientific hypothesis must be (1point) Correct Able to be ...
Wednesday, October 1, 2014 at 2:11pm

Materials Science
A cube of the isotropic, linear elastic epoxy resin E=2GPa, ν=0.3, α=50×10−6K−1 at 20∘C is unloaded. It is then heated to 60∘C. What is the corresponding strain matrix? The temperature is held constant at 60∘C. What stress is ...
Wednesday, October 1, 2014 at 12:45pm

Materials Science
An isotropic epoxy resin (E=2GPa, ν=0.3) is reinforced by unidirectional glass fibers (Eglass=70GPa), aligned in the 2 direction, such that the fiber composite is transversely isotropic, with the 1-3 plane being the plane of isotropy. The elastic constants of the fiber ...
Wednesday, October 1, 2014 at 12:44pm

Materials Science
A linear elastic, isotropic epoxy resin with elastic modulus, E=2GPa, and Poisson’s ratio, ν=0.3, is loaded by the following stress state: σ=⎡⎣10 5 0 5 −20 0 0 0 0⎤⎦MPa Give numerical values for all strain components in the ...
Wednesday, October 1, 2014 at 12:43pm

Materials Science
Rubber particles, roughly 1mm in diameter, have been added to an epoxy resin to increase its resistance to crack growth. Estimate the Young's modulus of the composite, given that the Young's moduli of the epoxy and the rubber are, respectively, 2GPa and 10MPa, and that...
Wednesday, October 1, 2014 at 12:41pm

Materials Science
Aluminum is a cubic crystal, with S11=1.59×10−11 m2/N S12=−0.58×10−11 m2/N S44=3.52×10−11 m2/N What are the Young's modulus, Poisson's ratio and shear modulus, corresponding to these values? Young's modulus E (in GPa): ...
Wednesday, October 1, 2014 at 12:40pm

Materials Science
A cylindrical pressure vessel, with a diameter of 40cm and a wall thickness of 10mm is made of steel (isotropic, with Young’s modulus = 200GPa; Poisson’s ratio = 0.28) and is pressurized to 20MPa. The longitudinal and hoop stresses in the wall, σl and σh, ...
Wednesday, October 1, 2014 at 12:38pm

Science quick question urgent check my answer
bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless My answer: spores?
Wednesday, October 1, 2014 at 11:02am

Science
-Describe the zero sum rule -True of False: The formula for the nitride ion is N^(-3) -True of False: The stock system shows the charge on the negative ion Answer this Question
Wednesday, October 1, 2014 at 10:01am

Science
What is an indicator and how are they useful to scientists?
Wednesday, October 1, 2014 at 12:45am

Science quick question
bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless My answer: spores?
Tuesday, September 30, 2014 at 11:49pm

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