Monday
August 31, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

Science
A fishtank measures 11 ft X 18 ft X 12 ft in English dimensional units. If water weights 62.4 lbs/ft3, what is the weight in lbs of the water filling the tank?
Thursday, May 14, 2015 by Shaterri

Science
A fishtank with inside dimensions of 164 cm X 76 cm X 96 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms?
Thursday, May 14, 2015 by Angela

science
what is the change in momentum when a body dropped from a height of 20 m and hits the ground and rebounds with the same speed?
Thursday, May 14, 2015 by meena

science(physics)
The stream of a river is flowing with velocity 1 km/h.What should be the direction of a swimmer to cross the river straight if he can swim at the rate of 2 km/h in still water.
Wednesday, May 13, 2015 by Anonymous

Science: Space
I'm having trouble finding the answers to these fill-in-the-blank questions: Our understanding of the solar system has changed from an Earth-centered model of ____ and ____ to the sun centered model of _____ and _____. I was thinking for the first 2 blanks: rocks; oxygen ...
Wednesday, May 13, 2015 by Anonymous

Computer science
Write the pseudocode for a method that receives as input the cost of a meal, and then adds a 9% tax rate, and then outputs a 15% tip on top of the price+tax
Wednesday, May 13, 2015 by Alex

science please help
after the dna strands are separated, which of the following is the next step of DNA replication in the S phase of the cell cycle? Action of helicase formantion of RNa primer breaking go hydrogen bonds joining of nucleotides i think either B or D
Wednesday, May 13, 2015 by john

science please help
in evolutionary terms, RNA is thought to have preceded proteins and DNA. Which of the following observations provides the most convincing support for hypothesis? a) there are more types of RNA than there are DNA b) RNA contains combined catalytic, structural, and genetic ...
Wednesday, May 13, 2015 by john

SCIENCE: CONNEXUS HELP!
Lesson 12: Energy Unit test Unit 3:Energy 1.The diver has the least gravitational potential energy at position A-1 B-2 C-3 D-4 2. 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 ...
Wednesday, May 13, 2015 by MM

science please help
after the DNA strands are separated, which of the following is the next step of DNA replication in the S phase of the cell cycle? A) Action of helicase B) formation of RNA primer C) Breaking of hydrogen bonds D) joining of nucleotides i think it is either B or D
Wednesday, May 13, 2015 by john

science please help
Which of the following factors is the most likely explanation for an energy deficit that results in exercise-induced exhaustion? a. inefficient protein production b. insufficient mitochondrial function c. impaired urea elimination d. absence of oxygen transporters on the cell ...
Wednesday, May 13, 2015 by john

science @elena please help
it has been hypothesized that chloroplasts originated from photosynthetic cyanobacteria that became symbiotic inside a host cell. Which of the following observations provides the strongest evidence for this suggestion? A) microscopically, chloroplast appear similar to ...
Wednesday, May 13, 2015 by john

Science
How much heat is produced when the body metabolizes a gram of trioleylglycerol?
Wednesday, May 13, 2015 by Johnny

Science 6th Grade Please Help!
How does wind affect precipitation? a. Wind does not have any effect on precipitation. b. Winds that blow from over the land contain a lot of water vapor that will cause precipitation. c. Winds that blow inland from oceans or large lakes contain very little water vapor that ...
Wednesday, May 13, 2015 by Trr

4th grade science
imagine that the air temperature in your classroom increased by 10 degrees celsius. Would the relative humidity of the air in the room go up or down? Explain. Please help!!!!
Tuesday, May 12, 2015 by Yellow

science
How does molecules move throughout the water cycle? evaporation: They move freely in the air condensation:They lose energy and are cooled runoff; they move down to the water precipatation: they fall down to the earths surface im really not sure so if i have something wrong can...
Tuesday, May 12, 2015 by Mariam

Science
How do I create a cladogram using DNA or protein sequences taken from three different organisms?
Tuesday, May 12, 2015 by SnakeSpirit

science
science questions:Look around your house and make a list o different kinds of containers that use insulation to keep foods hot or cold. If possible, describe the type of insulators used in each container. I don't know which containers in my house that uses insulation. Can ...
Tuesday, May 12, 2015 by Mariam

Ms. Sue PLZ HELP!!!(science)
Study the amino acid sequences of the same protein taken from four different species of plants. Which pair of plants is most closely related? Species 1: -A-P-A-C-W- Species 2: -G-P-G-S-F- Species 3: -A-P-A-C-F- Species 4: -N-K-M-H-H- a. Species 2 and 4 b. Species 1 and 3*** c...
Tuesday, May 12, 2015 by Anonymous

Ms. Sue PLZ HELP!!!(science)
Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this? a. The antibiotic mutated the bacteria, which allowed resistance to develop. b...
Tuesday, May 12, 2015 by Anonymous

science(check answers)
Which of the following is a correct description of a tornado A.a large swirling low pressure system that forms over that forms over the warm atlantic ocean B.A winter strom with wind speeds of at least 56 km/h and low visibility C. A violently rotating column of air in contact...
Tuesday, May 12, 2015 by brake down tonight

Science
True or False. Winds usually move from areas of low pressure to areas of high pressure.
Monday, May 11, 2015 by Idk.

Science
Should the government establish a national park to preserve the tundra in Alaska?
Monday, May 11, 2015 by Jim

L.A Ms. Sue? or anybody?
1. Which of the following aspects of the setting is evidence that the giver is an example of science fiction A. Jonas rides a bike to school every day B. jonas's father works in a daycare center C. a loudspeaker makes announcements to the community. D. Jonas lives in a ...
Monday, May 11, 2015 by anonymous

Science
When a water wave with a positive amplitude of one meter meets another water wave with a negative amplitude of one meter, what will be the result? Explain.
Monday, May 11, 2015 by Alex

Science
What is the formula for the frequency of visible light? Using this formula, explain what will happen to the frequency when yellow light (580 nanometers) is slowed down slightly when it passes through a crystal.
Monday, May 11, 2015 by Alex

Science help urgent :/
What has been the general trend in human population growth? A.) The human population has decreased. b.) The human population has remained constant. C.) The human population has grown exponentially. d.) The human population has increased and then decreased significantly.
Monday, May 11, 2015 by Amanda Fire

Science
1.If the current (in amps) remains the same, but the voltage increases, what effect does this have on the power (in watts) consumed by some device? 2.How is the dimension of time different from the dimensions defining space?
Monday, May 11, 2015 by Leo

Science
Is sulfur a good conductor or poor conductor of heat and electricity?
Monday, May 11, 2015 by Day

Science
Can you plz check asp 1. Suppose the total momentum of two masses before a collision is 100 kg m/s. What is the total momentum of the two masses after they collide? (1 point) 0 kg m/s 50 kg m/s 100 kg m/s 200 kg m/s 2. What is the momentum of a 20.0 kg scooter traveling at 5....
Monday, May 11, 2015 by Stephanie

Science
A free proton and a free electron are placed in a uniform electric field. Which of the 2 will experience a greater acceleration?
Monday, May 11, 2015 by Krishna santhosh

Science
Plz check it fast or just improve advice 9. Provide three statements that demonstrate the importance of units when describing motion. (3 points) Three statements that demonstrate the importance of units when describing motion are 1.unit i m/s indicate it is in SI unit 2.It ...
Monday, May 11, 2015 by Stephanie

science
it has been hypothesized that chloroplasts originated from photosynthetic cyanobacteria that became symbiotic inside a host cell. Which of the following observations provides the strongest evidence for this suggestion? A) microscopically, chloroplast appear similar to ...
Monday, May 11, 2015 by elena

science
Is glycerol a fat, carbohydrate or protein?
Sunday, May 10, 2015 by tom

Stats (Math)
Assume that Science scores on a 25-point quiz for a random sample of 5 students were drawn from a normal population. The assumed variance was 20 while the recorded variances were: 18, 16, 10, 13, and 23. You suspected that the variance is actually higher. What test do you need...
Sunday, May 10, 2015 by Leeroy

Science
one year ago How many Global Positioning System (GPS) satellites are required to pinpoint your location on Earth’s surface? (1 point) 24 12 3 5 i think it's 4, but 4 is not an option
Saturday, May 9, 2015 by Elliot

algebra
Megan's science teacher gave each student in her class a 20.0 gram sample of sedimentary rock. Each student is required to verify the rock sample by taking four mass measurements. Which measurement is the most accurate of the four recorded?
Saturday, May 9, 2015 by deaaron

Science
Water molecules are smaller and have less mass than alcohol and oil molecules. Explain why water is more dense than alcohol and oil.
Friday, May 8, 2015 by Sarah

Physical Science
A girl pushes on a box of Christmas Ornaments with a mass of 12 kg and it moves an acceleration of 2m/s^2. With what force does the girl push on the box?
Friday, May 8, 2015 by Jim

Science, check answers please
When a fan is turned on, it changes electrical energy into ____________ energy. -Motion** -Magnetic -Gravitational -Electromagnetic An experiment discovered that a particular material was a poor conductor of electricity. This material would most likely be used as a(n) -...
Friday, May 8, 2015 by Umacblackbelt

science
please unscramble dramalanse
Thursday, May 7, 2015 by Anonymous

c programming , computer science
1-Write a program that determines the day number (1 to 366) in a year for a date that provided as input data. As an example, January 1, 1994, is day 1. December 31, 1994, is day 365. December 31, 1996, is day 366, since 1996 is a leap year. A year is a leap year if it is ...
Thursday, May 7, 2015 by hisham

Science
1.how do plants grow when light comes from one side only? Why might plants respond to light this way? 2. What is a circadian rhythm? 3.What controls the change in leaves from night to day? 4.what might the plant leaves change from night to day?
Thursday, May 7, 2015 by M

Science
How do two tissue types work together to improve organ function
Thursday, May 7, 2015 by Lily

science
a desk is classified as a solid because it has a definite shape and volume at what???
Wednesday, May 6, 2015 by Bonnie

Please Answer my Question(Science)
1. Which of the following statements about continental glacial movement is correct? Continental glaciers can only flow uphill Continental glaciers can flow in all directions. Continental glaciers can only flow downhill** Continental glaciers do not flow at all 2. A farmer uses...
Wednesday, May 6, 2015 by Levi Ackerman

Science
Are these answers correct? 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 ...
Wednesday, May 6, 2015 by Emily

science
Jennifer made 5 L of punch for her party. Her brother made another 750 mL. If they combine the two batches, how many 180 mL servings would they have? Would there be any punch left over? If so, how much?
Tuesday, May 5, 2015 by Ri!@#$%^&a Papaiya

Science
WHICH SYSTEM HAS THE GREATEST TIDAL EFFECT? EARTH-SUN OR EARTH-MOON?
Tuesday, May 5, 2015 by Blake

science
Earth's energy sources include both nonrenewable and renewable resources. Name at least three sources of energy that could be used in your house. The describe the ideal energy source for generating most of your home's electricity, and explain why you chose that source...
Tuesday, May 5, 2015 by Bob

science
What is the difference between specific heat and heat capacity? If you heat 500g of H2O initially at 8C in a 1000 W microwave with 80% efficiency for 2 minutes, what will the final temperature be?
Tuesday, May 5, 2015 by Mary

science
a car travels due east on the level road for 3km it then turns due north at the intersection and travels 4km before stopping the magnitude of resultant displacement of car
Tuesday, May 5, 2015 by mehak

Science
What is the likability of a earthquake and volcanic eruption happening in Minnesota
Monday, May 4, 2015 by stranger

Computer Science
Create a program that allows a user to select one of the following four menu options: a. Enter New Integer Value b. Display Pointer Address c. Display Integer Address d. Display Integer Value For this program you will need to create two variables: one integer data type and one...
Monday, May 4, 2015 by kim

Science
if you exert the same force on two objects of different masses. which object will have the greater acceleration?
Monday, May 4, 2015 by Anonymus

science
When a tennis ball smashes into a tennis racket, the ball temporarily changes shape as it compresses against the racket. Which type of energy is temporarily stored with the ball as it is compressed? (1 point) elastic potential kinetic electrical potential
Monday, May 4, 2015 by Anonymous

science
3. A 10.0-kg animal is running at a rate of 3.0 m/s. What is the kinetic energy of the animal? (1 point) a. 3.3 J b. 30.0 J c. 45.0 J d. 90.0 J
Monday, May 4, 2015 by Anonymous

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

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