Science

Recent Questions

science
what is meant by vegetative propagation by stem?

science
who does vegetative propagation by stem occur. CAN YOU PLEASE TELL ME I'LL BE VERY THANKFUL !!

Science
Fat reacting with sodium hydroxide Is this a chemical or physical change My answer is chemical is this right answer Chemical A originally is buoyant in water; after it mixed with HCI, the new substance now sinks in water. My answer is physical change. Is this right?

Physical Science
A step-up transformer has primary coil with 15 turns. How many turns would be required in the secondary coil to increase the voltage from 60 v to 160 v? 15 x=160/80 x=80/15 x=?

Science
What is the kinetic energy of a soccer ball which has a mass of 4 kg and is kicked at a velocity of 10 m/s?

Physical Science
Question: Suppose you have sunlight shining on two clear containers of water on a table. Light waves refract through one of the containers but diffract around the other container. Describe how the two containers are different. (I have to write three lines, it's not a lot) ...

Science
lesson 9: energy and the environment unit test science 8 A Unit 4: Energy and the environment Please HELPPPPPP!!!!!!!

Science
Some people prefer to use herbal medicines how will you know if they actually work? Thanks.

Science
What damage to the environment can the use of plant hormones cause? Thanks.

Science
MRSA has evolved through natural selection, how? Thanks.

Science
Pure cultures of safe (non-pathogenic) bacteria can be used for laboratory investigations. What cultures need to grow and to keep the culture pure what must you do? Thanks.

Physical science
two forces of 5N and 12N respectively act on the same point.show how you would determine the magnitude of the resultant by using the tail to head and tail to tail methods and Pythagoras theorem

Science
In a chemical compound, would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? Why?

connexus science
This is for connexus academy unit 4 lesson 11 2.which of the following would result in the greatest reduction of waste A)composting food waste B)recycling glass plastic and metals*** C)reusing rubber leather and textile D)planting more trees in forest 3.which o the following ...

Science Fair
For my gr.8 science fair project, I have to come up with a catchy title. My science fair project is on how sugar affects your everyday activities and if it can have a benefit to your productivity. Anyone have an idea for a good title?

Science
You rode your skateboard 24 miles in 9 hours what was your average speed

Science
A quarterback throws a pass 50 m toward the end zone and it takes 2.8 seco to get there. What is the velocity of the ball in m/s?

Science
why does all the information available state that the maximum amount of table salt that can dissolve in water is: 36-39 g/100 ml @ 20 degrees Celsius. i put 35.7 g in 100 ml over a week ago, check it 3 times daily and a lot of it never dissolved. the water remained cloudy and ...

Physical Science
If element X has 81 protons, how many electrons does it have?

Science
Classify the chemical equation as a combination/synthesis , single replacement, or combustion NaCl(aq) + AgNO3(aq) à AgCl(s) + NaNO3(aq)

math
A teacher from Anderson Middle School printed k nametags in preparation for the science fair. Half of the nametags were given out to students and 100 nametags were given out to parents. Three-fifths of the remaining nametags were given out to teachers and contests judges. How ...

Earth science
Most of the sand that makes up the sandstone found in New York State was originally deposited in which type of layers?

Science
True or False: a trapezoid is a quadrilateral, but it is not a parallelogram. Explain your thinking

Science
A rock has an initial volume of 10ml and a final volume of 20ml. The mass of the rock is 30g. What is the density of the rock?

Science
A force of 400 N gives a mass (m1) an acceleration of 2 m/s^2. The same force gives another mass (m2) an acceleration of 13 m/s^2. What acceleration will this same force give if m1 and m2 are fastened together?

Science
What's pyramid of biomass?

Science!
Which of the following correctly identifies active transport? (1 point) Transport proteins move large molecules from areas of low concentration to areas of high concentration using cellular energy. Transport proteins move large molecules from areas of low concentration to ...

Physical science
the crest of wave A has an amplitude of 5 cm. the trough of wave B has an amplitude of 2 cm. if the crest of wave A combines with the trough of wave B,what will be the amplitude of the resulting wave? will the waves form a crest or a trough when they combine?

Inter Agric Science
Explain the effect of carbonation, hydrotion,hydrlosis and oxidation

Science
In your own words, can you describe one way which rocks formed on Mount Moran?

science
define protozoans

why do we fall ill- science
what ae the fators responsible for reduving immunity

science- sound class 9th
what is relation between frequency and time period

science- sound class 9th
aditi clapped her hands near a cliff and heard the echo after 4 seconds. what is the distance of cliff from her if the speed of sound is taken as 346ms-1

Math; science ;English; hindi; S.S
Construct a triangle in which BC=5.2 AB-AC=1.2cm and B=60° Also write the construction

Math science etc
Construct a triangle in which BC=5.2 AB-AC=1.2cm and B=60° Also write the construction

Science, Chemistry
A 1050.0 mL solution of NaOH is neutralized by 0.25 L of 2.00M Nitric Acid using Bromothymol Blue as an indicator. The concentration of the NaOH solution is 0.48M. True or False

math
The weight of 2 science fiction books and 1 autobiography is 5/6w pounds. What is the total weight of 4 of these science fiction books and 2 of these autobiographies?

science
Draw a diagram that represents vector AB + BC =vector 3RD

answer check science
1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation? A)The beam was made of ...

Science
Consider which is not an example of how an object gains elastic potential energy by stretching is a trampoline part In what form are all potential energy the same What is making an ice block to melt Describe three forms of energy Imagine that you push on a large rock.At what ...

science
1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation? A)The beam was made of ...

Science
What describes the current model of the atom? A)That electrons and protons move randomly around a nucleus. B)Electrons travel as waves in the electron cloud that surrounds the nucleus. C)Electrons orbit the nucleus like planets orbit the sun. D)Protons orbit the nucleus like ...

science questions please answer at least 45minutes
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. Melinda...

science
a boy is able to persuade his father to play with him in a seesaw. if the boy wanted to get on the seesaw and to balance his weight against his fathers at what point from fulcrum should he sit?

Science
How many grams of ammonia is produced when nitrogen is 84 grams

Science
Wolves: Moose: 6 10 3.Calculate the average of moose killed by one wolf in each territory. So, would I divide the number of moose by wolves, or wolves by moose?

Science
A uniform half meter scale is balanced at 60 cm mark.when weight of 10 gf and 30 gf are suspended at 20 cm and 90 cm mark respectively calculate the weight of scale

science
When a manganous salt is fused with a mixture of KNO3 and NaOH the oxidation no. Of Mn changes from +2 to what?

Science(physics)
A boy while driving to his school covers at the average speed of 15km/h.On his return trip along the same route, covers at the average speed of 25km/h due to less traffic.What is the average speed for the whole trip

Science Chemistry
LIST: SODIUM CARBONATE. CALCIUM CARBONATE. ZINC SULFATE. ZINC NITRATE. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a chemical equation for the ...

Science Chemistry
LIST: SODIUM CARBONATE. CALCIUM CARBONATE. ZINC SULFATE. ZINC NITRATE. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a chemical equation for the ...

Science Chemistry
LIST: Sodium carbonate. Calcium carbonate. Zinc sulfate. Zinc nitrate. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by a precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a chemical equation reaction...

Science
What is the effect on molarity for NaOH when balance used to weigh KHP is not properly calibrated and always reads 0.15 g too low.

Physical science
Determine the centripetal acceleration of an automobile making a tight turn that has a radius of 256 m, if the is traveling at a velocity of 25.0 m/s as it turns.

Physical science
What was Jack's speed from 5 sec to 10 sec

science
what mass of silver(1)nitrate is needed to prepare 100cm3 of silver(1)nitrate solution,concentration 0.2mol/dm3? the mass of one mole of silver nitrate is 170g please help me with this question

science
did anyone do the lab for product that conserve resources unit 4 lesson 5

science
Which of the pancreatic secretions digests starch into dipetides (a) trypsin (b) lipase (c) amylase (d) chymotypsin

Science
Define love

Science
Who discovered an antibiotic called 'pencillin' and when?

Science
What is Ganga action plan?when it was launched.

Science
Why does the increased level of nutrients in the water affect the survival of aquatic organisms?

Science
Explain how would you can locate the pole star with the help of Ursa Major.

science
writing blanced decomposition formula of Ammonium Carbonate

Science
The act of looking at the two or more thing are alike or different.

Science
An object is projected at an angle of elevation of 45 degree with a velocity of 100m/s. Calculate it's range

Science
What is the function of eustachian tube?

science
Describe how you would investigate effect of pH on enzyme rate. draw labelled diagram?

Science
A craane lifts an 8000N height 75m to the top of a buildings in 30s. How much power does the crane use?

Science
Cutting down trees for -------------- can increase soil erosion. It fill in the blank. four grade science I do not know it.

4 th grade science
Cutting down trees for ---------- can increase soil erosion. can some one help me please with this. fill in the blank.

Science
During an experimento a sunny Day,stu dental pour water on the sidewalk.every 30 minutes,they check the water to record antes changes.after 1 hour,they observe that all the water is gone. What happens to the water?

Science
4th Grade Most processes change land slowly, but people can change the land----------------- What the answer

Science
During an experiment on a sunny day,students pour water on the sidewalk.Every 30 minutes ,they check the water to record any changes.After 1 hour, they observe that all the water is gone.What happens to the water?

science
write the represtation of a nitrogen atom with mass number 14 and atomic number 7

science
one mole of an ideal gas is allowed to expand isothermally at 29.3 degree celsius from a volume of 4.0 litres and pressure of 5.0 atm to a volume of 10.0l and pressure of 2.0atm

science
establisHey relationship between si unit and commercial unit of energy

science
When an object moves on a circular path what is a work done?specify the reason

Science
For a 5 kg rocket and a thrust time of 5 s, what thrust makes the rocket reach a height of 871 m?

science
the body system responsible for the exchange of gases between the body and the enviroment is the

Science
Depletion of what has been halted by a ban on the manufacturing of what

science
The Hoover dam is a hydroelectric power plant that converts the energy of falling water into electricity. Which of the following determines the amount of potential energy of the water stored in the reservoir of the dam? Choose all that apply. A.the electric potential energy of...

science
what is the greatest number of times a hummingbird will flap its wings in 15 seconds.

science
Find the area of triangle whose vertices are A(2,0)B(4,5)C(6,3)in vector method

science
Why the solution of aluminium sulphate in water is not clear

science
Why the solution of aluminium sulphate in water is not clear

physical science
How much heat is absorbed by a 70g iron skillet when its temperature rises from 24oC to 110oC? joules

physical science
A pendulum has 501 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing? joules

physical science
What is the speed of a bobsled whose distance-time graph indicates that it traveled 107m in 26s?

computer, science, java, software
Write a Java program to declare and store numbers from 1 to 10 in a single dimensional array and display the output in the following format. 1 2 3 4 5 6 7 8 9 10

computer,science, java
Inorder to motivate the employees, the company has decided to announce the different types of bonus depends up on the employee’s Grade. If the employee belong to Grade A bonus=20% basic Grade B bonus=15% basic Grade C bonus=10% basic Grade D bonus=7% basic Grade E bonus=5% ...

science
Write a java program using classes and object to read the em[loyee code (Integer), Imployee name (string), Basic salary )double), Category (Character)then calculate the bonus(double)and the total salary(double)eligible for each employ. The output should have the employee code...

science
Explain the purpose of a control in a scientific experiment

science
If a scientist wished to to determine the effect of a certain herbicide on wee growth he would include a control in the investigation. Suggest a suitable control in this case.

science
Describe how you would investigate effect of ph on enzymes rate. Draw a labelled diagram to show how you carried out the experiment

science
An astronauts boots weigh 100N on earth where the acceleration of free fall is 10m/s2. How much will they weigh on Mars where the acceleration of free fall is 4m/s2?

science
write balanced equation showing the reaction occurs when lead is added to a solution containing a mixture of aqueous silver nitrate and copper(ii)sulfate

science
An astronauts boots weigh 100N on earth where the acceleration of free fall is 10m/s2. How much will they weigh on Mars where the acceleration of free fall is 4m/s2?

science
Explain how end product inhibition can control enzyme activity in living cells

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