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October 26, 2014

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science
two parallel plates are separated by a dielectric of thickness 2mm and a dielectric of constant 6.if the area of each plate is 40cm2 and p.d between them is 1.5kv,find the capacitance,the energy stored by the capacitor and the ratio of the capacitance if the dielectric is ...
Friday, October 10, 2014 at 5:04pm

Science
Cottage roof timber from Ireland. Date: 906 ± 35 years. What is the BP Date?
Friday, October 10, 2014 at 2:14pm

Materials Science
A thin-wall cylindrical tank has radius R, wall thickness t≪R and is subjected to an internal pressure p. The cylindrical wall of the tank is constructed by welding steel plates along 45∘ seams, Consider a small element of the cylindrical wall, and define local ...
Friday, October 10, 2014 at 2:22am

Materials Science
At a point in a plate subjected to plane stress loading along its surface, the cartesian stress components acting on the x-face of an element oriented along the (x,y) frame are σx=40MPa and τxy=70MPa, The maximum allowable shear stress, to prevent yielding of the ...
Friday, October 10, 2014 at 2:18am

Materials Science
In this problem, you will construct the 2D Mohr's circle for two plane stress states defined in terms of the Cartesian components of the stress tensor in the x,y reference frame: [ σx,σy,τxy]. For each of these stress states, you must construct and use the ...
Friday, October 10, 2014 at 2:17am

Materials Science
A compression bar, having a square cross section of side length b, must support a compressive load of magnitude W, uniformly distributed over the bar cross section. The bar is made of two segments connected by a glued joint along plane pq, which is at an angle α to the ...
Friday, October 10, 2014 at 2:13am

Science
How does a mutation in the DNA affect the way proteins are made? A. A mutation in the DNA results in misshapen tRNA molecules that do not fit inside the ribosomes. B. A mutation in the DNA results in a change in the mRNA and, ultimately, to a different protein structure. C. A ...
Thursday, October 9, 2014 at 9:01pm

Science
A person who has cystic fibrosis? A. Inherited two normal alleles from a parent. B. Inherited one mutated allele and one normal allele from each parent. C. Inherited two mutated alleles, one from each parent. D. Inherited two mutated alleles from a parent. Is the answer C? Thanks
Thursday, October 9, 2014 at 8:41pm

Algebra
Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th Grade 7th Grade 8th Grade High School 9th Grade ...
Thursday, October 9, 2014 at 8:35pm

Science
A mutation in a gene that controls mitosis in cells may cause? A. Cancer B. Cystic fibrosis C. Albinism D. Meiosis. Is the answer B? Thanks
Thursday, October 9, 2014 at 8:33pm

Science
How does a mutation in the DNA affect the way proteins are made? A. A mutation in the DNA results in misshapen tRNA molecules that do not fit inside the ribosomes. B. A mutation in the DNA results in a change in the mRNA and, ultimately, to a different protein structure. C. A ...
Thursday, October 9, 2014 at 8:27pm

Science- Physics
A young girl (m= 30 kg) rides a skateboard (m= 3.2 kg) at a speed of 4.2 m/s. (a) How much work does the girl have to do to bring herself to a stop? (b) How far does she travel if it takes 6.0 s to stop? (c) What is the magnitude of the stopping force? So I know W=Fd, but I ...
Thursday, October 9, 2014 at 7:33pm

Science
What is a genetic mutation? A. The process of decreasing chromosomes numbers to half of what the parent cell has B. The copying of DNA to form identical daughter cells C. A permanent change in an organisms genetic code D. a fusion of egg and sperm cell to produce a new ...
Thursday, October 9, 2014 at 5:55pm

science
if the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky, to be in august? A. 66 degrees F B. 83 degrees F C. 103 degrees F D. 125 degrees F please help!
Thursday, October 9, 2014 at 5:12pm

Science: Plate Techtonics (giving out medals)
Hey there! I need help with some answers 1. Why do earthquakes occur along the San Andreas fault line? 2. Which of the following causes Earth's plates to move continuously? 3. Which of the following physical features are not caused by plate tectonics? PLEASE HELP! giving ...
Thursday, October 9, 2014 at 4:57pm

Science
1. When evolution was first proposed, which of the following was used as evidence to support the idea? A. observations of nature B. laboratory experiments C. extensive fossil collections D. genetic sequences 2. How did Darwin and Lamarck differ in their thinking about change ...
Thursday, October 9, 2014 at 1:25pm

College Science
A chandelier is suspended by two identical, vertical chains side by side. The chandelier's mass is m = 5.3 kg. A. If the tension in one chain is represented by T, write an expression for this tension in terms of m and g, the gravitational acceleration on the Earth's ...
Thursday, October 9, 2014 at 1:17pm

science
1. True or False: If the net force of an object is 0 N, the forces are considered unbalanced. (True) 2. Which of the following forces causes a feather to fall slower than a blowing ball? gravity ← rolling friction sliding friction air resistance 3. A small fish in the ...
Thursday, October 9, 2014 at 11:15am

science
3.If a gap in the fossil record exists between ancient and modern forms of a species, which of the following is the most appropriate conclusion? A. The gap indicates that gradualism must have occurred for the species to evolve from ancient to modern form.*** B. The gap ...
Thursday, October 9, 2014 at 10:00am

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

environmental science
slogan about soil conservation
Monday, October 6, 2014 at 5:58am

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

Science
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 children’s’ playground...
Friday, October 3, 2014 at 10:47am

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

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