Science

Recent Questions

science
What are the major physical differences between the respiratory system of a human and the respiratory system of a frog?

Science ( just a little bit)
Which of the following characteristics of the arctic rabbit is specifically an adaption to the living in the tundra? ( my answer) B A) Small size B) Keen eyesight ***** C) Strong legs D) White fur do you think i can get the answers? according to the continental drift theory ...

Science
Help please! Nitrogen-fixing bacteria in soil turns nitrogen gas into _____. ammonia oxygen water carbon dioxide Please help!

Science
How are fossil fuels formed

Science
Nobelium -259 has a half life of 58 min? How much remains of 1kg sample after 1 day? Use the formula. A= Aö (1/2) t/h

Science, please help!
Please check my answer! Fill in the blank for below: Resources that cannot be replaced in the environment once they are used are _____. renewable resources compost nonrenewable resources I think the answer is nonrenewable resources.I might be incorrect, so please check! This ...

Science
A coach wants to find out the speed of the runners on the track team.Tell what simple equipment the coach need in order to do this and explain how it should be done.

Physical science b
The mass of ball A is 10kg and the mass of ball B is 5kg. If the initial velocity is set to 3 meters per sec for each ball, what is the final velocity of ball B if the final velocity of ball A is 2 meters per second? Use the elastic collision equation to find the final ...

Science
How are frogs able to alter the amount of cutaneous respiration that occurs?

Science
Determine the mass of lead chloride precipitated when 5g of sodium chloride solution reacts with lead trioxonitrate v.

Science
If a real frog was being dissected and the stomach has food in it, would any of it be identified?

science
what is an example of mutualism in a cave dwelling?

Extra Credit
This isn't really a question most people ask, but I have to! There is this extra credit for each subject Social Studies, math, Science, LA, etc. The one's I don't have good grades on are Math and Language Arts. My father is leaving on a trip tomorrow, so I don't have a lot of ...

Science
Draw an energy level diagram for the combustion of methane

Science
How much energy is given out whwn 1g of methane burns

Science
7. Which degree of tilt produced light similar to what North America experiences in summer? Explain your answer *Based on the four seasons portfolio I need help with this bevause I dont understand what it is asking. Is it asking for the areas or the degree? if its the degree, ...

science
Acetic acid (CH_3COOH) is a weak acid. a) Write the symbolic equation showing the ionisation of acetic acid. b)Given that an acetic acid solution of pH 4.8 has a hydrogen ion concentration of 1.58 * 10^-5 mol L^-1, what is the concentration of the acetate ion at equilibrium? c...

science
A what will the vibration of air mileules produce

science
Which simple machine operated on the same principle as the movements of the arm at the elbow

science
What could be some effects of population growth, natural disasters, disease, and advanced technology systems on resource availability?

science
What are the most important events in the history of animal life that occurred at the beginning and at the end of the paleozoic

Earth Science
What instrument records earthquake waves? A.) seismogram B.) seismograph* C.) Ritcher scale D.) barometer

Science
How has the number of species becoming extinct changed in the last few centuries?

Science
Does anyone know if there is a toxin in cigarette smoke or from hazardous waste that causes flu-like symptoms, shortness of breath, or swollen nose? Thanks.

Science
thermal energy is cause by the motion of ?

Science
What are the internal structures of a frog's stomach called?

Science
__ degrees east or __ degrees west are coordinates for what?

Science
A volleyball is served at the speed of 8.0 m/s at an angle 35° above the horizontal. What is the speed of the ball when received by the opponent at the same height

Science
A ball is dropped from height of 8m above the ground. After striking the ground the ball rebound instantaneously with the same speed it struck the ground. The instant at which ball strike ground, another ball is drop from the same height. Find the height in metres at which the...

Science
Yes I know this might be easy for some of you, but I have this problem on my homework and I'm confused. Why is water wet?

science
The magnitude of the force that a baseball bat exerts on a ball is 50. newtons. What is the magnitude of the force that the ball exerts on the bat? a 250 N b 5.0 N c 50. N d 10. N

science
how do we make Static Change?

Science
An open tank holds water 1.25m deep. If a small hole of cross section area 3cm^2 is made at the bottom of the tank, calculate the mass of water per second initially flowing out of the hole. (g=10m/s^2, density of water= 1000kg/m^3)

Science
What is the relationship between HIV and AIDS?

Science
What is the puckered opening between the legs of a frog called?

math
The science club sold 35 T-shirts last week and 28 T-shirts this week. What is the percentage of decrease in the number of T-shirts sold?

Science 7 A Unit 4
Think about how the amount of energy changes as you move stepwise from producers to primary consumers to tertiary consumers in a food chain. Which shape could you use to model the quantities of energy at all of these types? Circle Square Triangle Line

science
When a space shuttle was launched, the astronauts on board experienced an acceleration of 19.0 m/s2. If one of the astronauts had a mass of 60.0 kg, what net force in newton’s did the astronaut experience? Be sure to include your units.

Science
Which of the following best describes the velocity of an object? 5 m east 28 m/s 5m/s2 35 m/s east****

Science
What is “formal science” and how does it relate to natural and social sciences? How does each type of science play a role in environmental sustainability? How does ethical responsibility plan a role in environmental sustainability?

Science
What is the difference between speed and average speed?

Science
Will squids ink stain our skin?

Science Help
Whats an illness caused by a protist? I have to research it.

SCIENCE
WHAT IS CHEMICAL PROJECTS

Data Communication (Computer Science)
A noisy channel which has a bandwidth of 400KHz and theoretical channel capacity of 4.01Mbps. According to Shannon Capacity formula: a. Calculate the Signal Power received at the receiver end if the Noise Power is .001 Watt. b. Calculate the signal to noise ratio of the ...

Science
A biology class wants to perform an experiment to investigate the effect of different colors of light green, yellow, red, and clear cellophane and plant three seeds in each one. What part do the three seeds experiment? A. Confounding variable B. Independent variable C. Control...

science
How many protons are in the isotope Oxygen-20?

physical science
Please check my answers on this physical science quiz, thanks 1. in which of the following scenarios are action and reaction forces involved? a. when a tennis racket hits a ball b. when you step from a curb c. when you row a boat d. all of the above** 2. the product of an ...

Science
My first in van but not in pan

Science
Explain the reaction (iron sulpide) using the Big Idea of Energy?

Science Question PLEASE ANSWER QUICK! :D
27. What is the function of the astmosphere's ozone layer? A. shields Earth from harmful solar radiation B. provides the oxygen needed by human life C. protects Earth from sun's heat*** D. removes pollution from the atmosphere *** = What I think is the answer Thank you for ...

Science
A block of wood has a mass of 120 g and volume of 200 cm3. What is the density of the wood?

science
I need help to find important facts about the element Americium.

SCIENCE
ANY ONE HAVE THE ANSWERS PLEAZZZZ Mosquitoes, Be Gone! What scientific claim did the young scientists make regarding mosquitoes? * 6 points A. The young scientists claimed that mosquitoes are easily repelled using DEET and over the counter products. B. The young scientists ...

Science
An object with a mass of 4.5 kg is accelerating at a rate of 2m/s². What is the effect of doubling the force (on the same object) on the rate of acceleration? The acceleration will not be effected. The acceleration will be half of what it currently is. The acceleration will ...

Science
Diana is moving into a new apartment. She wants to get a heavy chair up to her second-floor apartment, but it will only fit through the window. Diana could strap the chair to her back and climb a ladder straight up to her window. Or Diane could use a simple machine, by sliding...

Science
Margarito's class is running sprints. Each student has to run to a wall 100 yards away, slap it, then run back to the starting line. It takes Margarito 53 seconds to run from the starting line to the wall and back again. What was Margarito's average speed? A.3.8 yd/s B.1.9 yd/...

Science
In which place u can able to see the object in the sky

Social science
What event led to the first shots being fired at the battles of Lexington and concord

Social science
How did the stamp act contribute to the Boston massacre

SCIENCE
SOME ONE PLEAS HELPPPP MEEE The breaking down or disintegration of substances such as rocks and minerals by physical, chemical, or biological processes is called- * 1 point A Erosion C Climate D Deposition 2. When particles carried by water, ice, or wind are dropped in ...

physical science
objects in free fall near the surface of earth experience a. constant speed b. constant velocity c. constant acceleration d. constant distance

Science
Bacteria, such as E coli are simple, single-celled (unicellular) organisms. Elodea, also known as water weed, is a plant that is commonly used in aquariums. Which of the following is a main difference in cell structure between an E coli and an Elodea cell? A.An Elodea cell ...

science
Using various telescopes, astronomers discovered a giant star that is 100 times larger than the Sun, and is very hot. It is blue-white in color. Why does the Sun appear brighter than this larger star when viewed from Earth? - The Sun is older than the larger star -The Sun is ...

science
Using various telescopes, astronomers discovered a giant star that is 100 times larger than the Sun, and is very hot. It is blue-white in color. Why does the Sun appear brighter than this larger star when viewed from Earth? - The Sun is older than the larger star -The Sun is ...

MC science history
Which of the following is not considered part of the "golden age" of microbiology? A.First artificial vaccine is developed B.Gram stain is devised C, Viruses are defined D.all of the above Who determined Archaea are the third domain of life? A.Carl Woese B.Winogradsky C.Kary ...

Science
The distance in degrees east or west of the prime meridian is called? A. Latitude **** B. Axis C. Equator **** D. Longitude

Science
what steps could be taken to control emissions levels?

science
How many grams of CO are needed with an excess of Fe2O3 to produce 35.0 g Fe? I just don't get how to set up so I could do the work

Science
Bacteria, such as E coli are simple, single-celled (unicellular) organisms. Elodea, also known as water weed, is a plant that is commonly used in aquariums. Which of the following is a main difference in cell structure between an E coli and an Elodea cell? A.An Elodea cell ...

phys science
1. speed is the ratio of the distance an object moves to a. the amount of time needed to travel the distance** b. the direction the object moves c. the displacement of an object d. the motion of the object 2. a car traveled 60 km in 2 hours, 84 km in the next 1 hour, and then ...

Science
How many grams of potassium chloride should be added to 1.5kg of water to lower it's freezing point to -7.5°c kf for water =1.86°ckg mol-1

Science
Girls will like that boys will use that parents will hate that -m-a-i-

science,
How many grams of CO are needed with an excess of Fe2O3 to produce 35.0 g Fe Solid sodium metal reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of of hydrogen are formed when 35 g of sodium are added to water?

Science
Suppose that instead of a pure tone coming from a tuning fork, the sound was a mixture of many different frequencies. Would all the sounds be magnified equally by resonance in the tube? Why?

science
with the exception of some green algae, all plants are that contain many cells

moral science
unscramble ineisfsirdne

science: plz help Mrs. Sue
Which of the following is a behavioral adaptation of a spider? a. poisonus venom b. web spinning c. eight legs d. body color My answer is a. plz check.

science
An object 2cm high is placed 20cm in the front of convex mirror of focal length of 10cm.So,that it is perpendicular to the principal axis.Find the poition and the size of the image.

Science
How is the equator similar to the prime meridian?

Science
Which element is most stable? Chlorine Helium*** Silver Oxygen

Science
What is the effect of hunting in the gender of species?

Science
Which terrestrial planet has an atmosphere similar to Earth's? Mars* Venus None of the above

science
A solution of ethanol water is prepared by dissolving 10ml ofethanol density 0.789g/mol in a 100ml of a solution with density 0.982g/mol.what is the cerntration of ethanol in the solution expressed in mass percent?;mass/volume percent?

science
HELP PLEASE I'VE BEEN STUCK ON THIS FOR TWO DAYS IDK WHY! |explain how plantlike protists are classified into groups.

science
Continental crust is ____ and _____ than oceanic crust. A) older, thicker B) older, thinner C) younger, thicker Eliminate D) younger, thinner

Science
Describe how changes in an ecosystem can affect organisms that live there

Science please help
List and briefly outline the six different periods into which the Paleozoic era is divided. The six periods: 1:Cambrian, which was 545 million years ago. 2:Ordovician, which was 490 million years ago. 3:Silurian, which was 445 million years ago. 4:Devonian, which was 415 ...

Science
Describe the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era. List and briefly outline the six different periods into which the Paleozoic era is divided. Answer: In the beginning of the Palezoic era, ...

Science
I have looked and I can not find the definition for acquired traits I'm looking for the def. part of speech & synonym Please help. Zack

Environmental Science
Has anyone read Life Everlasting: The Animal Way of Death by Bernd Heinrich? If so, can you tell me at least two claims made in the book, with in text examples if possible. Thanks so much!

Science
You need to separate a mixture of iron filings, sand, and salt. Which of the three would be easiest to separate first and what method would be best? A) The salt would be easiest to separate, and using a magnet would be the best method. B) The iron filings would be easiest to ...

Science
calculate the mass of NaOH required to make 500ml of 0.5Molar aqueous solution

11-science
A car travelling at a speed of30km/h is bought to rest in a distance of 8m by applying brakes. If the same car is moving at a speed of 60km/h the in it can be brought to rest with same brakes in???

science
an elephant of mass 50kg stands with all four feet on the ground. each foot has an area of 0.2m^2calculate the pressure exerted on the ground.[g=10m/s^2]

Science
Explain the factors that affect the intensities of absorption in IR spectroscopy. #Please anyone to help me with explanation i have to attend test by tomorrow help me out.

Science
1.If an animal is an ectotherm, It has? A. A skeleton on the outside of its body B. A skeleton on the inside of its body C. A body that regulates its own internal temperature D. A body that does not produce much internal heat

Science
NEED HELP STAT!!!!! 1.The neurons that transmit the signal to your foot to kick a soccer ball are called? A.Reflexes B.Motor Neurons C.Sensory Neurons D.Interneurons

Science
What did Alexander’s general want him to do

Science
Insert six G.M's between 8/27 and -81/16

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