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July 22, 2014

Homework Help: Science

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Recent Science Questions

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Science help!!!!
A______________________ is a tool used to capture the energy in sunlight. Recycling aluminum cans and taking shorter showers are two ways to practice the ________________________ of natural resources. Some plastics are made from corn. These plastics are biodegradable. This ...
Saturday, April 12, 2014 at 3:50pm

science
Identify and discuss the main safety legislation applicable to the installation, commissioning operating and maintaining the tube swaging machine.
Saturday, April 12, 2014 at 9:55am

Life science, tourism, geography, and maths litera
what careers can i do with this subject
Saturday, April 12, 2014 at 12:34am

World Civilization
1. In 1789, the National Assembly revoked the privileges of the aristocracy. This occurred in reaction to A. a peasant uprising. B. Louis XVI's withdrawal of troops from Paris. C. discontent among the poor people of Paris. D. the storming of the Bastille 2. What was ...
Friday, April 11, 2014 at 5:14pm

World History
1. In 1964, a loose union of Palestine refugees led to the formation of the Palestine Liberation Organization (PLO) under Yasir Arafat. What was the aim of the PLO? A. Driving Israel from East Jerusalem B. Establishing a Pan-Arab League C. Evicting Israel from Palestine D. ...
Friday, April 11, 2014 at 4:56pm

Science help!?
. If a kestrel eats a mouse that eats grass, the kestrel is a (1 point)producer. second-level consumer. first-level consumer. decomposer. 2. Which of the following best explains why a species of lizard is able to live in the desert but not in tundra regions? (1 point)High ...
Friday, April 11, 2014 at 4:53pm

Science
Problem: What are parts of a cell and how are animal cells different from plant cells? Hypothesis: Can someone help me get a hypothesis?
Friday, April 11, 2014 at 2:42pm

science
what is the momentum of a 20.0 kg scooter traveling at 5.00 m/s?
Friday, April 11, 2014 at 1:34am

Chemistry, Science
Write the balanced chemical equation for each of these reactions. Include phases. When aqueous sodium hydroxide is added to a solution containing lead(II) nitrate, a solid precipitate forms. However, when additional aqueous hydroxide is added the precipitate redissolves ...
Thursday, April 10, 2014 at 9:33pm

Science
Your are studying an evergreen tree that produces cones. The tree is an? -Angiosperm -Gymnosperm -Gametophyte -Monocot
Thursday, April 10, 2014 at 5:33pm

science
When a 30 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.8. Calculate the amount of acetic acid (in g) to be added to 0.5 L of this sodium acetate solution in order to bring its pH to the target value of 5.00.
Thursday, April 10, 2014 at 3:38pm

Science
Explain how gravitational, electrical, and magnetic forces act on a maglev train?
Thursday, April 10, 2014 at 12:33pm

science
Resultant of 2 vectors P and Q is inclined at 30 either of them. What is the magnitude of resultant vector?
Thursday, April 10, 2014 at 3:35am

science
Resultant of 2 vectors P and Q is inclined at 45 either of them. What is the magnitude of resultant vector?
Thursday, April 10, 2014 at 3:34am

science
Resultant of 2 vectors P & Q is inclined at 45 to either of them. What is the magnitude of resultant vector?
Thursday, April 10, 2014 at 3:32am

Science
A television contains a receiver that accepts visual and audio signals. True
Wednesday, April 9, 2014 at 9:39pm

Science
One pixel represents A.) A temperature range of 10-15 degrees. B.) A wind speed of 10 kilometers per hour. C.) A land area of 30 by 30 meters. D.) Various colors depending on their size. I think it is D. Thank You.
Wednesday, April 9, 2014 at 6:24pm

science
which is the good conclusion for verifiying the conserved linear momentum in a similated collision
Wednesday, April 9, 2014 at 4:43pm

Science
Explain some modifiable risk factors as well as some actions you can take to avoid dying from a lifestyle disease.
Wednesday, April 9, 2014 at 4:43pm

science
which is the good conclusion for verifiying the conserved linear momentum in a similated collision
Wednesday, April 9, 2014 at 4:40pm

Science
Suppose you make an electromagnet with a copper wire and a battery by putting the two ends of the wire on the two ends of the battery. If you switch the side of the battery, are you changing the magnetic poles of the wire?
Wednesday, April 9, 2014 at 4:38pm

Science
How do lifestyle diseases differ from other diseases?
Wednesday, April 9, 2014 at 4:32pm

Science
What happens to resistance when voltage increases but current is constant?
Wednesday, April 9, 2014 at 1:55pm

SCIENCE PLEASE HELP ME!!!!!!!! ASAP PLEASE PLEASE
Which chemical equation is balanced? (1 point) H20 H2 + 2O2 2H20 2H2 + O2 2H2O H2 + 2O2 H20 2H2 + 2O2 i think its c
Wednesday, April 9, 2014 at 12:22pm

Science
Sports teams always have instant cold packs stored in their first aid kits. Two chemicals are separated by a barrier inside the bag. Based on what you now know, explain how this cold pack gets cold without ice and what type of reaction is formed here? Please help! I do not ...
Wednesday, April 9, 2014 at 11:47am

science
In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. what is the Father's genotype, mother's genotype?
Wednesday, April 9, 2014 at 5:43am

science
The primary color of pigments ANSWER ARE Are the same as the secondary color of light Combine in equal amount to produce black All of above Thank You
Wednesday, April 9, 2014 at 12:10am

Science
What energy change occurs during condensation?
Tuesday, April 8, 2014 at 7:07pm

science
Describe DNA replication in prokaryotes. Include the major steps for origins of replication, unwinding DNA, and synthesis of new strands. Include at least 1 simplified diagram.
Tuesday, April 8, 2014 at 4:59pm

science
Using your knowledge of physiology, genes and evolution, discuss organism adaptations to the environment using clear and specific examples.
Tuesday, April 8, 2014 at 4:59pm

science
22. Given that humans thermoregulate, explain why your skin is cooler than your body core.
Tuesday, April 8, 2014 at 4:58pm

HELP!!! SCIENCE!!!
What are three key accomplishments of Marie and/or Pierre Curie?
Tuesday, April 8, 2014 at 4:17pm

Language Arts ~CHECK MY ANSWERS~
Are these answer are correct? Please be 100% correct / honest. Directions: For questions 7–15, rewrite each sentence, adding commas where needed. 7) While I was researching skateboards, I found an interesting old newspaper. 8) In the June 29, 1999 edition of the Mercury ...
Tuesday, April 8, 2014 at 4:06pm

science
A wave has a wavelength of 10mm and a frequency of 5 hertz what is the speed Answer Are 55 mm/s 50 hertz 2 mm/s thank you
Tuesday, April 8, 2014 at 2:53pm

Science Help????????????????
. A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? • frequency and wavelength • amplitude and wavelength • amplitude and frequency . Soundproof rooms take ...
Tuesday, April 8, 2014 at 2:51pm

Science Help PLEASE!! FAST
1. What happens to the levels of surface water and groundwater during a drought? Surface water and groundwater levels increase during drought. Surface water and groundwater levels decrease during drought. There is no change in the levels of surface water and groundwater during...
Tuesday, April 8, 2014 at 2:14pm

Science
Hey guys! If you could help me with a few of these question (they are fill in the blanks), that would be much appreciated. 1. Fertilizers and pesticides pplied to farm fields in Pennsylvania have made their way down into the Chesapeake Bay in Maryland. This is an example of ...
Tuesday, April 8, 2014 at 2:04pm

science
Compare and contrast gametogenesis in human males and females.
Tuesday, April 8, 2014 at 12:51pm

science
Describe DNA replication in prokaryotes. Include the major steps for origins of replication, unwinding DNA, and synthesis of new strands. Include at least 1 simplified diagram.
Tuesday, April 8, 2014 at 12:50pm

science
discuss organism adaptations to the environment using clear and specific examples.
Tuesday, April 8, 2014 at 12:50pm

science
Given that humans thermoregulate, explain why your skin is cooler than your body core.
Tuesday, April 8, 2014 at 12:50pm

Science
Refrigerators requires a lot of electricity and uses the most electrical energy in most households. Why do refrigerators require so much energy to be operated?
Tuesday, April 8, 2014 at 12:45pm

Science
In a(n) ___, the particles form a regular, repeating pattern. Answerlist: viscous liquid melting liquid amorphous solid or crystalline solid
Tuesday, April 8, 2014 at 4:39am

Science
Please Check my Work:pls check my work asap! 1. A ___ has a definite shape and a definite volume. (1 point) 1. solid (My Choice) 2. liquid 3. gas 4. molecule 2. Why is a gas able to flow? (1 point) 1. Its particles have melted and can move around. 2. Its particles have high ...
Tuesday, April 8, 2014 at 4:26am

science
a 1.0 kg metal head of a geology hammer strikes a solid rock with a speed of 3.9 m/s. assuming all the energy was retained by the hammer head, how much will its temperature increase?
Tuesday, April 8, 2014 at 12:35am

Science
Because we can't see through a gas cloud, we would not use optical telescopes which collect visible light to form images of stars inside a gas cloud. Which type of telescope would we use to study new stars inside the giant gas cloud and why? My thoughts are Infrared and ...
Monday, April 7, 2014 at 10:54pm

Science
Optical telescopes are designed to collect and create images from: A. White or visible light**** B. x-rays C. infra red radiation D. gamma rays My answer is A???? Thank you in advance
Monday, April 7, 2014 at 10:51pm

Science
Astronomers believe that background radiation is left over noise from the big bang. This noise can be collected and studied using a RADIO telescope. my answer: radio
Monday, April 7, 2014 at 10:50pm

Science
A gas sample in a sealed vial originally at 0.6 atm and 300 K, was heated to 450 K. What other property of the gas has changed? What is the value of this property after heating?
Monday, April 7, 2014 at 10:22pm

Single Room, Earth View by Sally Ride--Help!
This regards the story "Single Room, Earth View" by Sally Ride. Choose one of the following quotations; then in a few paragraphs, discuss how Sally Ride's observations support or refute the quotation. Quotations: 1. "Observation is a passive science, ...
Monday, April 7, 2014 at 10:07pm

Science
a) How much lime and what volume of CO2 at NTP will be obtained from 10 kg of limestone? b) How much ferrous sulphide will be required to obtain 1.12 g of gas at NTP by chemical reaction between ferrous sulphide and very dil.Sulphuric acid?
Monday, April 7, 2014 at 8:45pm

science/math
1. A light ray strikes a mirror at an angle of 42° from the surface of the mirror. What angle does the reflected ray make with the normal Ans. 42° 2. A ray of light hits a mirror at 27° from the normal. What is the angle between the reflected ray and the normal. ...
Monday, April 7, 2014 at 8:08pm

Science
explain how a microclimate can affect crop production I need someone to explain this to me because i don't get it
Monday, April 7, 2014 at 6:52pm

Science
Describe how a large water body can affect the amount of snowfall a region receives in the winter.?
Monday, April 7, 2014 at 6:11pm

Science
Use Newton’s first law of motion to explain how wearing a seat belt in a moving car could help prevent injury.
Monday, April 7, 2014 at 4:57pm

Science
You are given 10 µL of a DNA stock solution that has 1.0 µg target DNA/µL. The target DNA molecule is 2.9 kb in length. Describe a set of serial dilutions that would yield a standard curve with the following concentrations: 2 x10^7 copies/µL, 2x10^6 ...
Monday, April 7, 2014 at 4:34pm

Science
1.) Use Newton’s first law of motion to explain how wearing a seat belt in a moving car could help prevent injury. 2.) A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and after he or she ...
Monday, April 7, 2014 at 3:53pm

Science - Check my answers please (6th grade)
When are tides in Earths oceans the highest? 1. during the moon's waning gibbous phase 2. during the moon's waxing gibbous phase 3. when the moon is at a right angle to the sun 4. When the sun, Earth, and moon are in a line.
Monday, April 7, 2014 at 12:50pm

Science
Refrigerators requires a lot of electricity and uses the most electrical energy in most household. May anyone tell me why it is so expensive to operate?
Monday, April 7, 2014 at 12:03pm

Science - Check my answers please (6th grade)
earth and the moon are kept in their respective orbits due to the influence of ? a) inertia b) gravity c) both inertia and gravity d) neither inertia and gravity Is it c) both inertia and gravity?
Monday, April 7, 2014 at 11:41am

science
In cat, the gene for black coat is dominant to the gene for white coat. A heterozygous black cat is crossed with a white cat. which of the following is true about the ratio of the offspring from the cross? Black coat, White coat A. 1,3 B. 3,1 C.4,1 D.4,0 can you please give me...
Monday, April 7, 2014 at 3:56am

Science
Please help !! Look at my other question on science plzzzzzzzzzzzz
Sunday, April 6, 2014 at 10:41pm

Science
When did Gregor Mendel publish his results ? When did people notice how important his work was ?
Sunday, April 6, 2014 at 10:25pm

science
Im researching a disease caused by a cellular organelle that does not function properly. My topic is "cardiamuscle disease" and its organelle is the cytoskeleton. Ive searched google but cant seem to find a website to help me begin
Sunday, April 6, 2014 at 9:38pm

science
What Develop hypotheses would you predicting the efficiency of solar energy from direct sunlight against the 4 variables tested?
Sunday, April 6, 2014 at 8:13pm

Physical Science
13. Why can convex mirrors only produce virtual images? Sadly, I can't find this answer in my book. :( Any help would be appreciated, please and thank you!
Sunday, April 6, 2014 at 6:27pm

science -heredity
there are about 100,000 genes in each cell. Why would it be important scientists to identify what every one of these genes does? I put Genes will describe a trait of a person, example, it will determine if a person will be small or tall; blue or brown eyes and brown or blond ...
Sunday, April 6, 2014 at 6:14pm

Science
What are ten observations made by Charles Darwin on his voyage and what are their significance?
Sunday, April 6, 2014 at 4:57pm

Science
How many mole of magnesium atoms are present in 0.50g of manesium (mg=24)
Sunday, April 6, 2014 at 2:06pm

science
2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this.
Sunday, April 6, 2014 at 8:17am

science
1. Develop hypotheses predicting the efficiency of solar energy from direct sunlight against the 4 variables tested?
Sunday, April 6, 2014 at 8:16am

science
4. How could you increase the electricity generated by a solar cell during the day, when the sun’s angle is constantly changin
Sunday, April 6, 2014 at 7:21am

science
A uniform AB 2m long Rod which exerts a downwards force of 60N at its centre is placed on a knife egde support position 0.8m from A determine the vertical downward force required at A to prevent rotation of the Rod.
Sunday, April 6, 2014 at 1:13am

Science
Give 2 examples for sources of electricity?
Saturday, April 5, 2014 at 4:18pm

6th Grade Science - Help
Which of Earth's spheres has the most mass? 1. atmosphere 2. hydrosphere 3. geosphere 4. biosphere Is it Biosphere?
Saturday, April 5, 2014 at 10:12am

physical science
Provide three statements that demonstrate the importance of units when describing motion.
Saturday, April 5, 2014 at 6:09am

science
which of the following examples does not demonstrate a change in velocity? an elevator coming to a stop as it reaches the top floor a cruise ship heading west at a constant speed a soccer ball passed across the field a train remains at a constant speed as it goes around a bend...
Friday, April 4, 2014 at 9:45pm

Science
5.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.10 M, where it remained constant. Then, the container volume was doubled and equilibrium was re-established. ...
Friday, April 4, 2014 at 8:31pm

physical science
Which of the following pairs of objects would have the strongest gravitational pull? two buildings in the same city ← two tall buildings in different cities two stars very far away from each other two stars very close to each other my answer is c
Friday, April 4, 2014 at 8:29pm

Science
1.) Use Newton’s first law of motion to explain how wearing a seat belt in a moving car could help prevent injury. 2.) A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and after he or she ...
Friday, April 4, 2014 at 8:02pm

SCIENCE HELP ASAP! :)
1.) Use Newton’s first law of motion to explain how wearing a seat belt in a moving car could help prevent injury. 2.) A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and after he or she ...
Friday, April 4, 2014 at 7:56pm

science
Which of the following pairs of objects would have the strongest gravitational pull? two buildings in the same city ← two tall buildings in different cities two stars very far away from each other two stars very close to each other my answer is c
Friday, April 4, 2014 at 6:44pm

science
Which of the following examples does not demonstrate a change in velocity? An elevator slows down in order to stop at the top floor ← A cruise ship travels west at a constant speed A soccer ball is passed across the field or ← A train remains at a constant speed ...
Friday, April 4, 2014 at 6:41pm

physical science
would 2 stars very far away from each other have a strong gravitational pull
Friday, April 4, 2014 at 5:26pm

physical science
is an elevator slowing down as it reaches the top floor a change in velocity?
Friday, April 4, 2014 at 5:17pm

science
Develop hypotheses predicting the effect of pyrite and coal on the acidity of water?
Friday, April 4, 2014 at 4:53pm

Science/Biology
Please check my answers: 1. Which of the following correctly states the relationship between monkeys and humans? A. Humans and monkeys evolved from apes. B. Humans evolved from monkeys. C. Humans and monkeys evolved from the same ancestor, which is now extinct. D. Humans ...
Friday, April 4, 2014 at 4:40pm

science
what doesn't have to be measured in order to describe motion
Friday, April 4, 2014 at 2:02pm

science
what type of friction does a maglev train reduce
Friday, April 4, 2014 at 1:58pm

science
When a basketball changes shape as it bounces off the floor is it because of balanced force acting on it?
Friday, April 4, 2014 at 1:10pm

science
how the structure of a virus correlates with its function.
Friday, April 4, 2014 at 12:46pm

Science
Discuss how the structure of a virus correlates with its function.
Friday, April 4, 2014 at 12:08pm

chemistry/science
Not sure if i posted this but Need help with my pH calculations? 0.10 mol of solid sodium hydrogen carbonate and 0.20 mol of solid sodium carbonate are dissolved in the same beaker of water, transferred to a volumetric flask and made to 250.0 mL. The Ka for HCO3 – ...
Friday, April 4, 2014 at 11:37am

Physics, science
An electric kettle contain 1.5kg of water at 100 degree and powered by a 2.0kw electric element. He the thermostat of the kettle falls to operate, approximately how long will the kettle boil dry? (take the specific latent heat of vaporization of water as 2000kJkg
Friday, April 4, 2014 at 10:02am

physical science
a model train moving at a constant speed around a circular track has a constant velocity?
Friday, April 4, 2014 at 8:56am

science
How can water cause both mechanical and chemical weathering?
Friday, April 4, 2014 at 1:02am

Physical science
1) how does the electric force between two oposite charges changes when the distance between the charges is tripled? 2)how does the electric force between two oposite charges changes when the amount of one charge is doubled?
Friday, April 4, 2014 at 12:32am

science
How does Newton's first law of motion explain the movement of your body when in a car in which you are riding stops suddenly?
Thursday, April 3, 2014 at 11:43pm

science
Suppose you were designing a statue to be placed outside your school. What materials would you use, and why?
Thursday, April 3, 2014 at 11:41pm

science
How can water cause both mechanical and chemical weathering?
Thursday, April 3, 2014 at 11:27pm

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