Science

Recent Questions

Science
What is the mass of 0.8mol of Na(ii)CO(iii)

Science
Which is the first layer of the atmosphere?

Science
Which of the following is true about all electromagnetic waves in a vacuum? A. they all carry the same energy B. they all travel at the same speed C. they all have the same frequency D. they all have the same wavelength I think it's B

Science
are animal species just any kind of animals.

Science
Which of the following correctly describes a gamma ray? A.long wavelength and low frequency B.long wavelength and high frequency C.short wavelength and low frequency D.short wavelength and high frequency*** check please

Science
When the energy of a sound wave is transferred to a particle of a medium and causes it to vibrate and generate hear, the sound wave is A. reflected B. refracted C. absorbed D. transmitted I think it's C. check please

science
is a squirrel a animal species

Science check answers
1. Which of the following explains how natural selection leads to evolution? Conditions in the environment reduce competition for resources within a species Helpful variations accumulate among surviving members of the species*** Overproduction provides food for stronger ...

Science 8th Grade
In what ways can outside forces affect an object's motion, position, and shape?

science
find the no. of electron transferred between two ppints kept at a potential difference of 20V if 40 J of work is done

Science
Name two types of evidence used to support the theory of evolution. Explain how scientists use each type of evidence to provide support for evolution. Give one example of each.

Science
How did Darwin and Lamarck differ in their thinking about change in species? Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism’s environment. Darwin thought that change could occur in ...

science
If you could double check my answer that would be awesome :) which of the following is not part of the theory of evolution? Organisms tend to produce more offspring than can survive to reproductive age ** Organisms can acquire changes during their lifetime that can help their ...

Science, please check my answer Ms Sue!
How does a hurricane form? a.)It forms over a warm ocean water as a low-pressure area*** b.) it forms over a warm ocean as a high-pressure area. c.) it forms over cool ocean water as a low-pressure area d.) it forms over a cool ocean water as a high-pressure area. My answer is...

Science
The diagrams show two views of the same river flowing from a lake to an ocean bay. Which diagram below best represents the profile of the river bottom between points C and B?

science
Suppose some natural disaster occurs and a species of finch is forced to relocate from its original island where it dined on cactus flowers to an adjacent island with many fewer cacti but an overabundance of orchids. What would be the immediate consequences to the species in ...

science or biology
Similarities in the early development of chickens and opossums suggest that these organisms share a __________. I think is common ancestor

biology o science
Very few fossils of jellyfish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using the fossil record. What explains this? (1 point) Jellyfish fossils are buried deep under the ocean floor, not in land areas where ...

Science
2. How did Darwin and Lamarck differ in their thinking about change in species? I think its a

English
7.) "To Mrs. Saville, England, St. Petersburg, Dec. 11th, 17" You will rejoice to hear that no disaster has accompanied the commencement of an enterprise which you have regarded with such evil foreboding..." This excerpt from the introductory portion of Mary Shelley's ...

psychology
PLEASE HELP LAST QUESTION.??? Among William James's contributions to the science of psychology is that he A. he wrote the first American text in psychology b.. developed a psychodynamic treatment for mental illness. c.experimented with classical conditioning d. developed ...

Science
Find the density in g/cm3 of a 1573 cm3 piece of metal having a mass of 46 kg.

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?

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?

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?

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.

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 and ...

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

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

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 ...

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

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 ...

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 ...

Science
How much heat is produced when the body metabolizes a gram of trioleylglycerol?

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 ...

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!!!!

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...

Science
How do I create a cladogram using DNA or protein sequences taken from three different organisms?

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 ...

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...

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...

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...

Science
True or False. Winds usually move from areas of low pressure to areas of high pressure.

Science
Should the government establish a national park to preserve the tundra in Alaska?

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 simple ...

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.

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.

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.

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?

Science
Is sulfur a good conductor or poor conductor of heat and electricity?

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....

Science
A free proton and a free electron are placed in a uniform electric field. Which of the 2 will experience a greater acceleration?

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 ...

Science
Use the word ANGLE OF REFRACTION in a sentence?

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 ...

science
Is glycerol a fat, carbohydrate or protein?

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...

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

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?

Science
Water molecules are smaller and have less mass than alcohol and oil molecules. Explain why water is more dense than alcohol and oil.

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?

science
please unscramble dramalanse

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 ...

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?

Science
How do two tissue types work together to improve organ function

science
a desk is classified as a solid because it has a definite shape and volume at what???

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...

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?

Science
WHICH SYSTEM HAS THE GREATEST TIDAL EFFECT? EARTH-SUN OR EARTH-MOON?

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. (only ...

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?

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

Science
What is the likability of a earthquake and volcanic eruption happening in Minnesota

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...

Science
if you exert the same force on two objects of different masses. which object will have the greater acceleration?

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

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

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 ...

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-...

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...

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...

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 ...

science
hey is there anybody to talk to out there like ms sue

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?

Earth Science
the magnification of a telescope is changed by changing what? my answer is the eyepiece

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?

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

Science
There are 2 high and 2 low tides each day. Why do this many tides occur each day?

Science
On what sides does a "bulge" in the earth's oceans appear on the earth?

Science
How does the sun's gravitational attraction to the earth compare to that of the moon?

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

Science
Give an example of something that uses all third of Newton's Law.

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 ...

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?

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 ...

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?

science
How does the structure of epithelial tissue protect from dehydration

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...

science
to study and change of current due to variation of resistance in an electric circuit?

Science
How does the structure of epithelial tissue function to prevent dehydration?

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