Science

Recent Questions

science
For the human body to function correctly, the right amount of sugar must be present in the blood. Several hormones are produced by the body as part of a mechanism to counteract changes in blood sugar so that the amount of sugar remains relatively constant. Which characteristic...

science
What was the big Bang theory? How did scientist learn about it? Why is it so important today?

English
Subject names at school are as follows. math,science, social studies, computer science,etc. ----------------------------------------​----------- Can we use 'information' instead of 'computer science' as a subject name?

Science
#3) A person with trisomy 21 has an extra copy of chromosome 21. What happened during meiosis that caused the person to get three, instead of two, copies of chromosome 21? A) nondisjunction B) genetic recombination C) Binary fission D) Crossing Over I'm thinking that sounds ...

Science
Calculate the POH of a solution when H+ and PH is given

Science
An ideal solution made up of benzene C6H6 and toluene C6H5CH3 has mole fraction of benzene as 0.025,0.5,0.75,1.0 at various concentration. calculate the molar fraction of toluene Calculate the total vapour pressure of the solution at these concentration??

science
find the acceleration due gravity on the surface of Neptune. given that mass of Neptune is 16.7 times that of the earth and the radius of Neptune is 3.89 times that of the earth (Re = 6380 km )

Science
Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 m above earth's surface is it c object's acceleration due to gravity is less on the moon

Science
Acetic acid(CH3O2H) reacts with isopentyl alcohol (C5H12O) to yield isopentyl acetate acetic acid with isopentyl alcohol is 45%,how many grams of isopentyl acetate are formed from 3.5g of accetic acid and 4.75g of isopentyl alcohol? The reaction is ;

Science
A 50.0ml of volume silver nitrate solution contains 0.0285 moles of silver nitrate, what is the molarity of silver nitrate

Science
A simple of oxygen gas at room temperature and 1.03atm occupies a volume of 22dm³. Find the volume of the oxygen gas at STP?

Science, chemistry
Electrophilic substitutions reaction of pyrrole

Science
I am a world of five letter People eats me If u remove my first letter i will be a form of energy If u remove my 2nd i will be needed 4 living If u remove my 3rd letter i will be a preposition If u remove my 4th letter i will be frink 4 u Ans if u r mastermind !

science
A boy moves 100m towards North then 70 my towards East then what is its displacement

Science
a machine must be driven at 100 r/s from a belt pulley of 600 mm diameter revolving at 72 r/s . the maximum tensile force on the belt must not exceed 3000n .assume that the ratio of the tensile force is 2,5:1. A Diameter of the driven pulley. B the power in kW that can be ...

Science
a machine must be driven at 100 r/s from a belt pulley of 600 mm diameter revolving at 72 r/s . the maximum tensile force on the belt must not exceed 3000n .assume that the ratio of the tensile force is 2,5:1

Science Help
Place the following words into the illustration below gametes, sporophyte, gametophyte, and zygote. Explain how the terms are related. MY ANSWER 1. sporohyte 2. gametes 3. gametophyte 4. zygote I just need to explain my answer but I do not know how to. Please help me!!!

science
I need help with finding some sources of error! My experiment is that there is one candle lit and five different sizes of beakers being upside down onto the candle (one at a time) and seeing how long it takes for the candle to burn out for each beaker. I already have one but ...

Science
What would you do to measure the volume of a baseball? I've checked my notes and even opened my book! Please help! (I don't think I need a formula yet, I'm not being taught them in Science)

English
We were brought up together; there was not quite a year difference in our ages. I need not say that we were strangers to any species of disunion or dispute. Harmony was the soul of our companionship, and the diversity and contrast that subsisted in our characters drew us ...

Science
How is velocity different from speed?

Science
I’m really confused on the Lesson 10: Structures and Properties of Matter Unit Test for 6th grade. Can anyone explain it to me?

Science (Last question of these)
Ball A, with a mass of 10kg, is moving to the right at 20 m/s. Ball B is moving to the left at 20 m/s. Upon collision, Ball B comes to a standstill, and Ball A moves to the left at twice its original speed. What is the mass of ball B? How do I do this?

Science
Ball B, with a mass of 30kg, is moving to the left at 10 m/s. With what velocity should Ball A, with a mass of 10kg, move to the right and collide with 2, so that ball A rebounds with a velocity of 30 m/s, and Ball B with velocity of 10 m/s, after the collision? Assume the ...

Science
The earth is in constant motion. It rotates and revolves. Which of the following is NOT TRUE of the Earth's motion? A Due to the revolution of the Earth, we experience seasons. B The Earth rotates on its axis once every 24 hours. This causes day and night. C The rotation of ...

science
Why must not the condensed water drip into the flask?

Science
Ball A, with a mass of 20 kg, is moving to the right at 20 m/s. At what velocity should Ball B, with a mass of 40 kg, move so that they both come to a standstill upon collision? How do I solve this?

Science
Is the Yacca Mountain facility currently in use? Why or why not?

Science
I don't know anything to put for "Y" for Eukaryote. Help please.

Skills for success science
Plz help due tomorrow would of done it but I had a lot of school work but here the question which of the following factors drives all the weather on Earth, including large-scale storms and local weather systems? Plz help not asking for answers but help plz and thank you

science
how does mass and aceleration affect force???

Science
Choose all of the chemical reactions which correctly show that chemical reactions must obey the Law of Conservation of Matter. a. CH4 + 2O2 → CO2 + H2O b. H2 + O2 → H2O *** c. C6H12O6 + 6O2 → 6CO2 + 6H2O d. 2CO + O2 → 2CO2 *** e. 4P + O2 P4O10

Science
1) What unit is speed measured in? 2) Why is it important to include units when describing motion? I've read this entire lesson. I just can't seem to find these answers.

Science
How do external factors (such as stirring or shaking) determine whether a mixture will become a mechanical mixture or a solution?

Math
Isaac and Sakura are both doing a science experiment where they are measuring the temperature of a liquid over time. Graphs that represent each of their data are shown below. mc003-1.jpg mc003-2.jpg Which statement is correct? The slope of the graph that represents Isaac’s ...

science plzzz help
From inside to out, describe the components of an atom. What makes one element's atoms differ from another element's atoms?

science
which of the following is an example of recycling a renewable resource? a turning food scraps to compost b washing plastic forks and use them again. need help please only right stuff

Science
1.) A 2OL Of gas is found to exert 3.5atm at 25°C what would the pressure be if the temperature is changed to 30°C.

Science
Why can't we use static electricity to accomplish certain things, such as activate or charge an electric instrument?

Science
1.Carrying capacity is the maximum number of_________ that an ecosystem can support. A - different species B - Individuals in a population C - habitats D - limiting factors 2. end an island ecosystem, a species of beetle feeds on the leaves of a Shrubbery plant. A species of ...

Science
Because the tilt of Earth's axis always points in the same direction, the seasons in the Northern and Southern Hemispheres are always _______ Options: A : Same B : Opposite C : three months apart. D : six months apart. PLEASE HELP ME ASAP

Science
You will be designing and carrying out your own experiment to investigate the effect different forces have on an object’s motion. The experiment you design should test at least one of the forces that affect motion that you have learned about in this unit. It should be ...

Science
Carrying capacity is the maximum number of_________ that an ecosystem can support. A - different species B - Individuals in a population C - habitats D - limiting factors 2. end an island ecosystem, a species of beetle feeds on the leaves of a Shrubbery plant. A species of ...

Science
Can someone check my answer? ____ is anything that has mass and volume. My answer: matter. Is that correct?

Math / geometery
A science museum has a spherical model of the earth with a diameter of 6.5 m. What is the volume of the model to the nearest cubic meter? Show your work.

science
A driver takes off with a speed of 10m/s from a 5m high diing board at 30° above the horizontal how much later doesh she strike the water A rescue plaNe carries a package of emergency supply to be dropped at a point that is very close to a target the plane travels with a ...

Science
When water is mixed with another substance and the mixture will not scatter light, the mixture is a:? 1) suspension  2) compound  3) solution  4) substrate 

Science
An object is placed 14cm from the convex lens. If this lens is of focal length 7cm determine the position and nature of image by graphical method.

Science
The weight of a 75 kg body, 8km above earth surface is 550 Newton. Calculate the gravitational strength at that height

science
Calculate the time it takes for Ball A to return to its starting point when given 15 m.s

Science
A 9.8basketball player runs at a speed of 7m/s A.what is kinetic energy B.how much work was done by player to reach his speed starting from rest

science
what grow throughout their life but what grow only upto certain age

science
Which option correctly defines a scientific theory? an explanation for observable facts that is supported by experimental evidence a scientist’s best guess, or assumption, about the cause of a problem a process of carrying out specific, well controlled tests in order to ...

physical science
what is transferred by a force moving an object through a distance? a. force b. mass c. motion* d. energy please check my answer

physical science-asap
If you perform 10 joules of work lifting a 10-N box from the floor to a shelf how high is the shelf? a. 1 m b. 2 m c. 10 m d. 100 m

science
Define inductive reasoning. using general theories or principals to make predictions about more specific situations doubting or not accepting conclusions or ideas until they have been adequately tested and verified answering questions based on what can be perceived by the ...

science
what are the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era?

Science
A body of mass 12kg is acted upon by a constant force on 12N for 6secs. Calculate the kinetic energy gained by the body.

science
Which option correctly demonstrates scientific thinking in practice? The lava flowing from a volcano must be very hot because it is a liquid. The lava flowing from a volcano must be very hot because the majority of scientists agree that it is very hot. The lava flowing from a ...

science
Define inductive reasoning. using general theories or principals to make predictions about more specific situations doubting or not accepting conclusions or ideas until they have been adequately tested and verified A? answering questions based on what can be perceived by the ...

Science
7. The rate at which velocity changes is? A. Acceleration B. Direction C. Speeds D. Velocity 8. Which is the example of velocity? A. A pickup driving 30 km in 20 minutes B. A car slowing down on a sharp curve C. An airplane traveling 450 km/h D. An 18 wheeler driving west at ...

Tutor
Hi, I am a student a Michigan's connections academy and I need a tutor to help me out with some types of math, science, social studies. And a few others some stuff I don't understand and all of my teachers don't explain very good except for my math teacher. I understand math ...

Science
"Most of the solar radiation is absorbed by the atmosphere and much of what reaches the earth's surface is radiated back into the atmosphere to become heat energy." What can you conclude about heat energy? Most of the sun's energy is used to make heat energy. A small amount of...

science
plz check my answers. 1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? 1. a solar eclipse ** 2.a lunar eclipse 3. a total lunar eclipse 4 a penumbra 2. which of the following statements about a lunar eclipse is true? 1. A ...

Science
What it the answer to this Two nonmetal from group 16 are likely to form what

Science
Which of the following diseases is not explained by germ theory? a- malaria b-HIV c-cancer d-flu

science
Please help me with the following questions. 1. As the mantle heats up due t the heat from the core, it begins to rise. Why does this happen? A. Because density is increasing as temperature increases B. Because density is decreasing as temperature increses C. Because mass is ...

Science
1. How did plantesmals form plants A. They broke into smaller chunks B. They collided and stuck together** C. They cooled and pulled ice together D. They began to rotate 2. Whats the distance used to define the astronomical unit A. The average distance across the sun its ...

Science
A bullet of mass 10gm is fired from a gun of mass 1kg with a velocity of 100m/s. calculate the ratio of kinetic energy of the bullet and the gun.

Science
Why is it important for scientists to figure out how much matter is in space?

Science
How does the mass of the moon and the earth help the moon stay in its orbit around the earth?

Science
1. What do we call the small wavelength that we can see? 2. How does light travel? 3. What type of lenses are used in a refracting telescope?

Science
CASE STUDY HYPOTHESES: Circumstantial evidence is adequate or inadequate demonstrate racial profiling. Questions: Anecdotal (circumstantial) evidence may be discounted by some but not others. Anecdotal, circumstantial, evidence that can easily be discounted as an aberration? ...

Science
Which of the following does not change when a car keeps a constant speed, but changes direction? a.Acceleration b.Velocity c.Momentum d.Mass*** Can someone review my answer and make sure that I'm right?

science
how does subduction change the ocean floor

Science
Why does methylated spirit evaporates faster than water

science
which of the following statements accurately describes the development of the geologic time scale?

science
Which places the types of clouds in correct order from most thick and puffy, to most thin and wispy?

Science need awnsers
Studies conducted in England during the industrial revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely explanation for this difference in height is a difference in A) nutrition b) family size...

Science
What is the major difference between ectotherms and endotherms? 1)whether or not the animal builds nests on land 2)whether or not the animal has ben found on several continents 3) whether or not the animal maintains a constant body temperature 4) whether or not the animal is ...

Science
Atomic Theory is A. subject to change if new information is discovered*** B. a solution to the problem of differing isotopes. C. unchangeable D. a descriptive table that list all of the elements.

mechanical science
aminibus of 1500kg moving at velocity of 72km/hr collide with astationary car of mass 900kg determine the common velocity

Mechanical science
The table planning machine is driven horizontally by hydraulic pressure on a piston contained in a cylinder 80mm in diameter. The on the cutting tool is 5KN,the Mass of the moving part is 1000kgs and coificient friction is 0.05.calculate pressure required in the cylinder....

mechanical science
aminibus of mass15Kg travelling at avelocity of 72km/hr collides with astationary car of mss900kg.The impact takes to see see before the two moving at aconstant velocity of20m/s.calculate the;common velocity,distance moved after the impact,the force of imulse during ...

Science
How does visible light be made to give off spectral lines?

Science
I need some one to help me do my portfolio for reasons for the seasons I have to demonstrate how the angle of the sunlight affects its intensity, and I don't know how to do that.HELPPPPPPPPPPPPPPPP

Science
Do all cells in a person have the same banding pattern?

Science
What is the relationship between inertia and mass? (Is inertia higher or lower when you have more mass?)

Science Biology
Help please reviewing for test and in my notes I have a comment. Animal cell oraganella are larger than plant cell organella is this correct - I have searched everything and cant find an answer.

science
Which option correctly describes the scientific way of thinking? (Select all that apply) rational skeptical practical empirical B,D?

science
Examine the situation. Lloyd is studying the effect of breakfast cereal on the health of rats. He suspects that the cereal may be unhealthy. He feeds rats various amounts of breakfast cereal over a six-week period. He weighs the rats using a digital lab balance at the ...

science
Examine the situation. Gregor Mendel wondered how traits were inherited, but the technology to study genes was unknown. By crossing pea plants and observing their traits, he concluded that the traits of living organisms are controlled by structures called genes each gene is ...

Science
Which is a better insulator of heat, a plastic spoon or a wooden Popsicle stick?

Science
Pls teach me how to evaluate sin 375° without using calculator

science
How much work is done in raising a 16.1 kg backpack from the floor to a shelf 1.82 m above the floor?

physical science
What is the kinetic energy of a 2,710 kg car that is traveling at 66.0 km/h?

science (physics)
State gauss's theorem draw a graph showing the variation of electric field, as one moves from the centre of charge metal ball to a point on its surface and then to a far off outside point

science (physics)
What is a Gaussian surface?A point charge of 2.0mueC at the centre of a cubic Gaussian surface 9.0cm on edge.What is the net electric flux through the surface?

science
Define deductive reasoning. using general theories or principals to make predictions about more specific situations using specific observations in order to come to more general conclusions using specific observations in order to come to specific conclusions using general ...

Science
How could you use your open circuit to test if a material is a conductor or insulator? I'm thinking that you would have to use the resistance of a light bulb. If you set it all up, and the light bulb did not turn o, you have an insulator, if it did turn on, you have a ...

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