Wednesday
July 1, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

science
Two identical masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass compare to the other? a. The faster object has the same kinetic energy as the slower object. b. The faster object has less kinetic ...
Monday, May 4, 2015 by Anonymous

Ms. Sue PLZ HELP!!!(science)
A portion of the amino acid sequence of an enzyme from a worm is shown below: -Q-Q-Q-Q-N-N-N-C-C Analyze the same potion of the same enzyme taken from several other organisms. Place them in order from most closely related to the worm to most distantly related to the worm. -Q-...
Monday, May 4, 2015 by Anonymous

Science
How does the C horizon form? Rainwater washes clay minerals from the A horizon to the C horizon Plant roots weather pieces of rock plants add organic material to the soil bedrock weathers, and breaks up into soil particles.** What makes up soil besides rock particles, minerals...
Monday, May 4, 2015 by Levi Ackerman

Science 6 th grade
Can you plz check this :0 True/False 1. Kilometers per hour describes the speed of an object. (1 point) true false * Multiple Choice 2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? (1 point) an airplane flying...
Monday, May 4, 2015 by Stephanie

science
In commercial/industrial life, most AC apparatus (e.g. lifts, lights, machinery, air conditioning, motors and so on) take more from the electricity supply source than they actually need. Power Factor Correction (PFC) is an energy saving technology that is used to improve the ...
Monday, May 4, 2015 by azad

science
hey is there anybody to talk to out there like ms sue
Monday, May 4, 2015 by alyssa

science
What is the major difference between how water and nutrients are carried in a plant and how water and nutrients are carried in the human body?
Sunday, May 3, 2015 by Fayt

Earth Science
the magnification of a telescope is changed by changing what? my answer is the eyepiece
Sunday, May 3, 2015 by Steve

science
750N diver does a triple somersault off a 10m platform. If it takes 1.5sec. to hit the water. What is the diver's power?
Sunday, May 3, 2015 by sandra

science
The mass of a beaker containing a sample of sodium dichromate was determined to be 68.9 g. After transferring a sample it weighed 56.424 g.Determine the mass (g) of sodium dichromate transferred to the correct number of decimal places
Sunday, May 3, 2015 by Diana

Science
There are 2 high and 2 low tides each day. Why do this many tides occur each day?
Sunday, May 3, 2015 by Mark

Science
On what sides does a "bulge" in the earth's oceans appear on the earth?
Sunday, May 3, 2015 by Kim

Science
How does the sun's gravitational attraction to the earth compare to that of the moon?
Sunday, May 3, 2015 by Robert

science
A 80 kg firefighter climbs flight of stairs 6 meter high in 10 seconds. How much work is required by the firefighter?
Sunday, May 3, 2015 by andro

Science
Give an example of something that uses all third of Newton's Law.
Sunday, May 3, 2015 by Anonymus

Science
An existing cord that you use for a lamp is much thinner than an extension cord recommended for use with large appliances. if u plugged in a refrigerator using a lamp extension cord, the plastic coating of the cord could melt and perhaps start a fire. why does this occur? how ...
Sunday, May 3, 2015 by Albert Einstein

science
The blocks shown are released from rest with the spring unstretched. The pulley and the horizontal surface are frictionless. If k = 427.1 N/m and M = 4.5 kg, what is the maximum extension of the spring?
Sunday, May 3, 2015 by haddad

Language Arts
which of the following are you most likely to find in a science fiction novel such as The Giver? A. People living in a futuristic environment where rules lead them to act differently than is commonly accepted now. B. Characters from the distant past achieving great things and ...
Friday, May 1, 2015 by Dove

Math
ack's science teacher gave each student in his class 15.0 grams of an unknown substance to identify. Each student was required to verify the mass of their substance by taking four measurements. Which of Zack's measurement was the most accurate of the four recorded?
Friday, May 1, 2015 by Chasidy

science
How does the structure of epithelial tissue protect from dehydration
Friday, May 1, 2015 by lilly

Science
Which of the following is a renewable source of energy? A. gasoline B. wind C. natural gas D. coal I am not fully understanding these sources and energy thing...
Friday, May 1, 2015 by Giana

science
to study and change of current due to variation of resistance in an electric circut?
Thursday, April 30, 2015 by vincent d

Science
How does the structure of epithelial tissue function to prevent dehydration?
Thursday, April 30, 2015 by Anonymous

Science
What type of tissue do you think the wall of the villi is made from? Is it connective tissue or maybe epithelial tissue?
Thursday, April 30, 2015 by Anonymous

Science
Does the circulatory system make hormones, or merely distribute them after they are made in endocrine tissues?
Thursday, April 30, 2015 by Anonymous

Science
why might an ecologist use a food chain for one study and a food web for another study
Thursday, April 30, 2015 by M

Discrete Math
12 A computer science department has a probability of 0.35 that a senior receives a job offer in IT before graduation. Random select 8 senior students • What is the probability that 5 students received offers before graduation? • What is the probability only 1 ...
Thursday, April 30, 2015 by Peace

Science Plzz Help Ms sue
explain how genetic variation and environmental pressures can lead to a change in the characteristics of a population.
Thursday, April 30, 2015 by Leighla

Science/Conversion
Please help me with this How do I convert 10ug/mL to: 1) 100ng/ul 2) 100ng/100ul Thanks
Thursday, April 30, 2015 by Venice

Earth Science
What are some factors that make it difficult for geologist to learn about the Precambrian era?? Please Explain
Thursday, April 30, 2015 by Blue42

Science please check answers
In a particular breed of cattle, a black coat is dominant over a red coat. If a cow with a red coat is crossed with a black bull that is heterozygous for coat color, what percentage of their offspring would you expect to be black? 25 50 75*** 100 A scientist is studying a ...
Thursday, April 30, 2015 by Caleidoscope

science
A car owner pushes a car with a force of 80 N. The car does not move. Which of the following best describes the force that the car exerts on the car owner?
Wednesday, April 29, 2015 by dejif

science
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
Wednesday, April 29, 2015 by Amanda

science
A new organism is introduced into a ecosystem. it gets its nutrients from a dead tree. can this organism be described as a scavenger or decomposer
Wednesday, April 29, 2015 by Angelina

science
Could you please check my answers? Question one: When evolution was first proposed, which of the following was used as evidence as support? A. Observations of nature. B. lab experiments. C. extensive fossil collections, D. genetic sequences. I chose answer C. Second Question: ...
Wednesday, April 29, 2015 by kyle

Science Please help Ms. Sue!!!
Which of the following does not reduce water pollution? a) cleaning up oil and gasoline spills. b) reducing pollutants such as pesticides and fertilizers. c) increasing the use of gasoline.*** d) properly treating waste water Can you please check my answer?
Wednesday, April 29, 2015 by Sarah

physical science
A baseball diamond has 90 feet between bases. A player hits the ball and runs to 1st, 2nd and stops at 3rd base. The player's displacement is
Wednesday, April 29, 2015 by Anonymous

Physcial Science
Standing on top of a tall building a student drops their physical science book. How far has the book fallen at 5 s?
Wednesday, April 29, 2015 by Anonymous

science
The aquarium was sealed and placed at a bright corner. After two weeks, both the number of water plants and water snails increased. (a) Besides their gaseous needs, state one other way in which the water snail and the water plant are interdependent.
Wednesday, April 29, 2015 by emily

Science
Can you give me examples of palatable inorganic acids other than phosphoric acid?
Wednesday, April 29, 2015 by Kumaresh

science
A uniform plank of a seesaw is 5 meter long and supported at its centre.a boy weighing 40kgf sits at a distance 1.5meter from one end of the seesaw.where must a girl weighing 25kgf sit on the other end of the seesaw so as to balance the boy.
Tuesday, April 28, 2015 by nitesh srivastava

computer
17. Which of the following sources likely has the most reliable information? A. A graduate student's blog that was updated ten months ago B. A company-sponsored website with detailed citations C. A computer science textbook written by an expert in the field in the early ...
Tuesday, April 28, 2015 by Tina

science
Jenny is doing an experiment to see if students in her class like apples or oranges best. She will offer each student an apple or an orange. Then she will record how many students took each kind of fruit.What is a valid prediction Jenny could make about the results of her ...
Tuesday, April 28, 2015 by angel

science
HIV. B. Reed-Sternberg cells. C. Epstein-Barr virus. D. ARC
Tuesday, April 28, 2015 by yogita

Science Please help me Ms. Sue?!?!?!?
1) Forests and fisheries are examples of A. abiotic factors B. energy factors C. renewable resources*** D. nonrenewable resources 2) How has the human population changed during the last 50 years? A. The human population has increased exponentially*** B. The human population ...
Tuesday, April 28, 2015 by Olivia

science
how many of its photons are required to ionize atomic hydrogen? Einstein quote for Lenard’s measurement of the “largest effective wavelength for air”=190 nm,, For this problem, take the energy of the ground state of the hydrogen atom to be −0.99946650834R...
Tuesday, April 28, 2015 by nnn

science
How much heat is added to 10 g of water when you start from room temperature and heat it to its boiling point?
Monday, April 27, 2015 by Alex

science
When comparing the flow of lymph in the lymphatic system with the flow of blood in the circulatory system, it can be said that the lymphatic system also A. contains fluid that travels in a closed circuit. B. uses a pump. C. contains fluid that travels in only one direction. D...
Monday, April 27, 2015 by yogita

SCIENCE HELP! Ms.Sue
Check my answers! In the 1930s, windmills were widely used to generate electricity on most farms in the united states. which kind of energy resource is used in windmills? A. Recyclable energy B. Nonrenewable energy C. Renewable energy**** D. Potential energy The amount of land...
Monday, April 27, 2015 by Anon101

Computer science(Information Retrieval Architectur
Given the following three items where w2, w4, etc. all represent different words. Compare how well the shingle process works in determining which items are near duplicates by looking at the shingles composed of 3 words versus shingles composed of 6 words. Use the rolling ...
Monday, April 27, 2015 by Nany

Computer science(Information Retrieval Architectur
9. Given the following documents determine the weights for Naïve Bayesian category for document to be about “Trees”. Given the new document listed determine if it should be given the category or not. (14 points) Doc1 Oak, Plum, rose, Oak, Oak, Plum, ash, ash, ...
Monday, April 27, 2015 by Nany

Computer science(Information Retrieval Architectur
9. Given the following documents determine the weights for Naïve Bayesian category for document to be about “Trees”. Given the new document listed determine if it should be given the category or not. (14 points) Doc1 Oak, Plum, rose, Oak, Oak, Plum, ash, ash, ...
Monday, April 27, 2015 by Nany

Computer science(Information Retrieval Architectur
PATRICIA TREE: a. Create the PATRICIA Tree and Reduced PATRICIA for the following 01010101010110 to 8 levels of sistrings (level 1 is original string). b. Assuming a search term of 01010101111 calculate the number of comparisons needed for the PAT tree and the reduced PAT tree.
Monday, April 27, 2015 by Nany

Computer science(Information Retrieval Architectur
Stemming: a. Compare advantages and disadvantages of Porter Stemming algorithm, Dictionary stemming algorithm and Success Variety stemming algorithm. b. Create the symbol tree for the following words (canopy, cars, cabony, cabossy, cabort, cabins, cabity, cabiry) Using ...
Monday, April 27, 2015 by Nany

Computer science(Information Retrieval Architectur
A. Why are inverted files the most typical structure used for search systems? How does n-grams modify the inversion list approach? B. Discuss the similarities and differences between N-gram and PATRICIA TREE approach to indexing.
Monday, April 27, 2015 by Nany

Computer science(Information Retrieval Architectur
a. Describe how the statement that “language is the largest inhibitor to good communications” applies to Information Retrieval Systems. b. Relate this to the challenges in information retrieval that make it difficult to find the information a user is looking for. c. ...
Monday, April 27, 2015 by Nany

Computer science(Information Retrieval Architectur
Consider the use of entity identification and categorization. a. What problems are they trying to solve – what are they trying to do. b. How do they affect the list of processing tokens in an item? c. How do they affect the Document Vector for the item?
Monday, April 27, 2015 by Nany

science
A harmonic wave is traveling along a rope. The oscillator that generates the wave completes 49.0 vibrations in 20.8 s. A given crest of the wave travels 402 cm along the rope in a time period of 14.9 s. What is the wavelength?
Sunday, April 26, 2015 by Desia

science help
Explain how the hooves of the camel are adapted to move in the dessert.
Sunday, April 26, 2015 by Kayla

science
1.Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A.One species preys on the other. B.The relationship is mutually beneficial. C.They share the same niche. D.One species benefits, while the other is ...
Saturday, April 25, 2015 by Anonymous

Science-Physics
From what height was a brick dropped if it hit the ground with a speed of 4.3 m/s?
Saturday, April 25, 2015 by Desirae

Science
How much force is exerted to lift 750 kg of water in the well against the force of gravity? How much work is done to lift this water .05m? How does this compart to hte work done byt he man in teh treadmill?
Saturday, April 25, 2015 by Megan

physical education
For science fair project interview from an expert: 1. How much should my time improve in 30 days running a mile? 2. Will the type of shoe I wear affect my running time? 3. How will the weather affect my time? 4. Do different track surfaces affect my time? 5 What can I do to ...
Friday, April 24, 2015 by Mason

Science help
Which of the following illustrates conduction as a mode of heat transfer? a) A microwave oven produces electromagnetic waves that transfer to the food in the form of heat*** b) leaving a metal spoon in a bowl of hot soup will make the spoon hot as well c) Pasta rises and falls...
Friday, April 24, 2015 by Destiny

Science
Which evidence from the sea floor shows that tectonic plates move? a) the sea floor is youngest near a mid-ocean ridge and older farther away b) The sea floor is much older than the continents c) mid-ocean ridges form the longest range of mountains on earth d) The sea floor is...
Friday, April 24, 2015 by Destiny

Please Help, I REALLY need it btw-science
1. which of the following is not a method by which minerals form? a) crystallization b) decrystallization c) water evaporation from a solution d) cooling of magma or lava (more will be listed)
Friday, April 24, 2015 by Destiny

Computer Science
What are the types of errors that can be encountered in programs?
Friday, April 24, 2015 by Wenwen

Science
uppose 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 ...
Friday, April 24, 2015 by Student

Science
A gardener plants several flowering plants of the same species and notices that about 10% of the plants produce larger flowers than the others. He keeps track of the distribution of flower sizes over several years as shown in the table below. What explains these observations? ...
Friday, April 24, 2015 by Anonymous

science
Which of the following is not a characteristic of igneous rocks? a. Igneous rocks are formed when molten rock cools and hardens. b. Igneous rocks have crystal grains. c. Igneous rocks are larger in size because the rock cooled more slowly after the hot lava came out from the ...
Friday, April 24, 2015 by basketball&batman

science
__________ rocks forms when a rock is changed by heart,pressure, or chemical reactions. a) Igneous b) Sedimentary c) Metamorphic d) Chemical i think its c
Friday, April 24, 2015 by basketball&batman

physical education
For science fair project interview from an expert: 1. How much should my time improve in 30 days running a mile? 2. Will the type of shoe I wear affect my running time? 3. How will the weather affect my time? 4. Do different track surfaces affect my time? 5 What can I do to ...
Friday, April 24, 2015 by Mason

science
Are BEVs or hydrogen fuel cell vehicles a more promising transportation technology for the future? (This is question #3 from p. 608.) Should car companies be required to produce electric cars?
Thursday, April 23, 2015 by Abby

Some research questions
I missed this week until today, and my science professor told me I have until tomorrow to do at least 50% of this project. Project: A 20 slide power point presentation over economy and environmental issues in Bolivia. Must include pictures, extra points for sound. Country ...
Thursday, April 23, 2015 by Kattliveslife

science
Infer how zebra mussels change the biotic conditions in an aquatic ecosystem. How could the changes affect the biodiversity of the ecosystem?
Thursday, April 23, 2015 by thi

Science
What are some home appliances that can cause phase changes?
Thursday, April 23, 2015 by Mariam

math
in a science experiment the temperature of a liquid dropped 30 degrees over 6 hours what integer shows the average hourly temperature change of the liquid
Thursday, April 23, 2015 by steven carpenter

Science
the force of gravity on jupiter is much stronger than the force of gravity on earth. which of the following explains why this is true. A. Jupiter's orbit is farther away from the Sun and Earths orbit B. Jupiter has more mass than Earth C. Jupiter's orbit is closer to ...
Thursday, April 23, 2015 by Abby

Science
if 225 ml of 0.25M HCL and 25ml of 2.5M NaOH was used what is the limiting reagent in this experiment?
Thursday, April 23, 2015 by Pat

Science Check
This is the question Consider a wetland ecosystem similar to the one shown in the image below. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor.Suppose...
Thursday, April 23, 2015 by Kareemah

Physical Science
At 27 degrees Celsius and 750 mm Hg, a sample of hydrogen occupies 5.00 L. The space it occupies at STP = 4.49 L. Should the 4.49 L be rounded to 4.5 L? If not, is there a specific rule that explains rounding for this type of problem?
Thursday, April 23, 2015 by Doris

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Thursday, April 23, 2015 by Andrew

Science
Explain how a thermocouple works. What are thermocouples used for?
Wednesday, April 22, 2015 by Earl

Life science
A pure-breeding black coat cat was crossed with a hybrid black coat cat. (a)Represent the diagrammatically .(b)What percentage of the offspring
Wednesday, April 22, 2015 by Bandlalakhe Duma

science
4. A 70.0 g sample of water at 95.00°C is mixed with 50.0 g of water at 135.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. Remember that the heat gained by the cooler water is equal to the heat lost by the warmer water.
Wednesday, April 22, 2015 by Lilian

science
A 30.0 g sample of water at 280. K is mixed with 50.0 g of water at 330 K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. Remember that the heat gained by the cooler water is equal to the heat lost by the warmer water.
Wednesday, April 22, 2015 by Lilian

science
2. A 75.0 g sample of a metal is placed in boiling water until its temperature is 100.00C. A calorimeter contains 100.00 g of water at a temperature of 24.40C. The metal sample is removed from the boiling water and immediately place in water in the calorimeter. The final ...
Wednesday, April 22, 2015 by Lilian

Science- Earth's History- 1 question
Which of the following events occurred during the Mesozoic era? a. Dinosaurs became common on land. b. Whales and dolphins evolved in the oceans. c. Reptiles evolved on land. d. The supercontinent Pangaea formed. i think its c
Wednesday, April 22, 2015 by basketball&batman

science
the sun photosphere gives off radiation that reaches earth as what
Wednesday, April 22, 2015 by lawrence adams

Science
What is the equilibrium concentration of silver ions at 25 degrees C in a 1.0-L saturation solution of silver carbonate to which .20 mole of NaHCO3 has been added? The Ksp of Ag2CO3 is 8.1 x 10-12 at 25 degrees C
Tuesday, April 21, 2015 by Jade

Science
On an inclined plane, how much force will move a resistance of 30 kg? I know that 5 kg of force will move a resistance of 15 kg, but cannot see the connection between the two numbers to finish the rest of the examples.
Tuesday, April 21, 2015 by Marcia

Science
How do you think that a plane could initialize the dragging? (Think of the parts of the wing that move)
Tuesday, April 21, 2015 by Aimee

Science
The effect _______ explains how fast air moves across a surface, the ____ pressure that presses on that surface. In contrast, the more ____ that air moves, the more of _____ there will be. I'm sorry that it might not make sense, I translated it from French. I tried using ...
Tuesday, April 21, 2015 by Alex

Science
What are the four flight forces? Give a brief description of each.
Tuesday, April 21, 2015 by Sam

Science
If you lift a 15 °C unsaturated air bubble from the surface to 1 km height, what would be its final air temperature?
Tuesday, April 21, 2015 by Katelyn

Science
If you lift a 15 °C air bubble from the surface to 1 km height and the environmental temperature at 1 km is 10 °C, what stability does the atmosphere demonstrate at this level?
Tuesday, April 21, 2015 by Katelyn

science
Which of the following is called the "master gland"? A. Pancreas B. Adrenal C. Thyroid D. Pituitary
Tuesday, April 21, 2015 by yogita

science
Which of the following best describes the overall function of hormones? A. To control physiological processes in the body B. To stimulate the growth and maturation of body organs C. To provide a pathway for nerve messages D. To determine masculine or feminine reproductive traits
Tuesday, April 21, 2015 by yogita

science
A boy is pushing a lawn mower with a force of 200N.The force makes an angle of 20° with hprizontal . 1. determine the force applied to move the lawn mower forward 2. Maximum height reached by an object.
Tuesday, April 21, 2015 by Tshilidzi

Pysics science
The resultant of vectors A⃗ and B⃗ has a magnitude of 20 units. A⃗ has a magnitude of 8 units, and the angle between A⃗ and B⃗ is 40o . Calculate the magnitude of B⃗
Tuesday, April 21, 2015 by Sammmy

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