Science

Recent Questions

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 ...

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...

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?

science
what is paper chromatography

Science
Cottage roof timber from Ireland. Date: 906 ± 35 years. What is the BP Date?

Science
Pleistocene mammoth bone from La Brea Tar Pits of Los Angeles, California. Age: 12,200 ± 35 years. What the BP Date?

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...

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 generated ...

SCIENCE
how is newton's first law used in everyday situations

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.

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.)...

Science
What kinds of materials tend to be conductors? Insulators?

Science
Food and beverages examples for phosphoric acid?

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...

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...

Science
How do you define a controlled experiment?

Math
Carter got the following scores on Science tests: 78,82,88,90,93. What is the mean deviation?

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

Science
make an observation of food waste occurring in your home and write at least two sentences describe the waste that has occurred.

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?

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.

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

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 with ...

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 , ...

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 , ...

physical science
using the cinetic theory explain what caused gas pressure

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?

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, ...

environmental science
slogan about water conservation

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?

Science
Can you get results from observations? Can you still get results from doing only small amounts of experiments?

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 ...

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?

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 ...

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

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.

science
The muscles of a very active organism would contain more mitochondria than the muscles of a less active organism. Select one: True False

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

science
Krebs Circle produces A)NADH and Carbon Dioxide B)ADP and NADP C)Acytol CoA and sugars D)Water and Carbon Dioxide

science
what is a adaptation

science
An electron drop to what energy level is likely to emit a photon in the infrared region?

science
a base jumper jumps from a height of 2500m, after 2.5s how fast was he traveling

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

HELP!
is nursing a science major?

Science
How fast will A 0.15kg baseball accelerate if a batter hits the ball with a force of 420Newtons?

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.

science
A “Set” within quantitative theory represents…?

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 ...

science
An object of mass m is thrown vertically upwards.At what rate will its momentum change?

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.

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!

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 ...

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 ...

Science
why is burning magnesium an irreversible reaction?

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 ...

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. ...

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

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?

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 ...

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

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

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 ...

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 ...

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 ...

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 ...

Science help?
On the global grid, the prime meridian is at _____. 0 degrees latitude 90 degrees latitude 0 degrees longitude 90 degrees longitude

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

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

Int. science
The creation of graphs usually occurs during _____. data analysis data collection observation questioning I think it might be B

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

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 dehydrated ...

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?

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?

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?

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...

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?

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...

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 = (100mM)(x) Solve...

Science quick question
bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless

Science
Describe the changing definitions of an element?

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 ...

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 required ...

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 ...

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 ...

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 the ...

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): Poisson's ratio ν: Shear ...

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, ...

Science quick question urgent check my answer
bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless My answer: spores?

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

Science
What is an indicator and how are they useful to scientists?

Science quick question
bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless My answer: spores?

Science 1 quick question
Suppose monerans lost the ability to fix nitrogen. How would this affect other organisms?

Science
Vocabulary Write a brief paragraph using the terms sedimentary rock,metamorphic rock,and rock cycle.

science
What is the speed in meters per second of a boat traveling at a speed of 16.1 knots?

Science
... During dry weather, does the water level in a small pond drop because of runoff? If not then what is it?

Science
May you please tell me if these are true or false, if they are false then can I have the true statement, thank you In the water cycle, water returns to Earth as (condensation) usually in the form of rain or snow During dry weather, the water level in a small pond drops because...

science
an astronaut has a mass of 60 kilograms on earth. what would her mass be on mars? what would her weight be on mars? the strength of gravity o mars is 3.7 m/s^2.... am having a slow moment, please help

science
what is background information mean?

science
So the question is write down three examples of science in your everyday life. This was my answer: sound- compression wave, Baked goods- chemical reaction, Looking at mountains or ocean- earth science Please check my answer and see if this is good thank you

science
what are examples of science in your everyday life please help

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