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science grade 11
Two people, one of mass 51.4KG and the other mass of 78.0 KG, sit a distance between of 2.3 metres apart on a low friction sleds with the same friction coefficients. A)what is the strength of the gravitational force between them? B) suppose the friction is slowly reduced until...

science grade 11
A waiter carries a 253g drink a distance of 12m on a horizontal tray at constant speed of 1.1 m/s. A) what work is done by the normal force of the tray on the drink? B) what work is done by the friction force of the tray on the drink?

science
Youre travelling down the road in a car with a total mass(including passengers) of 2.24 X 10^3 a)What is the change in kinetic energy of the car if you slow down from 80km/h to 70km/h(reducing your speed by 10km/h) B)what is the change in kinetic energy of the car if you slow ...

children's literature
Aesthetic development increases a person’s appreciation of: A. beauty and numbers. B. art and numbers. C. beauty and art. D. beauty and science. D?

science
A certain echocardiogram uses ultrasounds with a frequency f = 6.1130 MHz. The speed of sound in blood is 1570 m/s. The patient is aligned so that blood is flowing through the heart directly towards the transducer (the transducer produces and detects the ultrasound waves). If ...

science
why are models important?

science chemistry
Explain how Particles moves in solid lead,molten solid,gaseous lead in these three state of matter

science
The velocity of sound in air at 27°celcius is 340m/s calculate the velocity of sound in air at 227°celcius ?

physical science
in a tug of war the left team pulls with a force of 300N and the right team pulls with a force of 150N. what is the resultant force?

science
A stone is dropped from a height 80m calculate k.e and p.e at ts t 2 s

Science
why can't a model of the solar system be proportionate in distance b/w the planets and size of the planets? I think that a scale model that is proportionate could include both

Science
Consider a wetland ecosystem similar to the one shown in the image below. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor. Suppose that the local ...

Science
.Fertilizers and pesticides applied to farm fields in Pennsylvania have made their way down into the Chesapeake Bay in Maryland. This is an example of _________________ pollution. Ms.Sue

Science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support.

Forensic Science
What drug is the greatest challenge for Forensic Science?

science (ASAP)
identify the terms or phrases that are paired together correctly a. deserts and dwarf trees b. temperate and deciduous forest and evergreen trees c. subarctic taiga and moss d. tundra and permafrost ***

Science
Other than moisture what are the three major components of the air you breathe

science
how many atoms are in 10.0 grams of sulfur?

Science
Which of these statements are true? A. There is more water on Earth now than there was millions of years ago. B. There is less water on the Earth than there was millions of years ago.(MY ANSWER) C. There is no way to tell how much water there was on Earth millions of years ago...

science
Three dogs—Ed, Max, and Marcie—are pulling a dogsled along a patch of ice. Ed pulls with a force of 115 N; Max pulls with a force of 62 N; and Marcie pulls with a force of 90 N. If there are no forces pulling the sled backward, what is the net force acting on the sled?

Science
This is for 7th grade science and I think this was good tell me if I'm wrong Like climate, change to an environment will affect the ones living in it. Plants that are moribund in an area where they grow changes in the environment will help the plants thrive because they change...

science
I need a acrostic poem on photosynthesis

Science
A pebble is dropped into a graduated cylinder with 20ml of water in it. After the pebble is dropped in, it sinks and the water level rises to 25ml. What is the volume of the pebble? (Numbers and Units!) I did 25ml - 20ml but the answer had to be something about density.

Science
Why isn't there any evidence of black holes? Or any pictures of black holes, there are always computerised pictures

Science
a 30 gm bullet is fired from a gun of mass 2kg with a speed of 800m/s. Find the magnitude and direction of the velocity of gun

science
Calculate the work done in each of the following situations. (a) A horse pulls a wagon with a force of 1200 N and moves it 15 m. (b) A cable lifts an elevator 16 m by using a cable with a tension force of 2500 N. -How much work is required to lift a 35-kg object from the ...

Physical science
Explain whether the size of an object’s displacement could be greater than the distance the object travels.

science
what are examples of a biomass fuel A.oil B. natural gas C.wood D. coal

Physical Science.
I need help answering this inferring question because I don't fully understand it. Q: Infer whether the size of an object's displacement could be greater than the distance the object travels.

Maths, Accounting, Life Orientation, Life Science, Physical Science, English and my home language (sepedi)
Could I become a social worker with those subjects?

science
Distillation and evaporation are methods to ______.

Science
What is the Largest Valve coming from the heart? Please help?? I think it either veins or the Aorta, but I'm not positive.

science
use the terms atome and element to xplane what makes silver and gold different

science
why ac current has variable frequency and voltage? I din't understand about hertz. please make me clear about it?

social science
the need to preserve and protect the Khajuraho temple

science
A train which is moving with uniform acceleration is observed to take 20 to 30 seconds to travel successive 0.4km.how much far then willing travel before coming to rest, if the acceleration remains uniform?

physics
In a science fiction novel two enemies, Bonzo and Ender, are fighting in outer spce. From stationary positions, they push against each other. Bonzo flies off with a velocity of +1.7 m/s, while Ender recoils with a velocity of -3.3 m/s. Determine the ratio mBonzo/mEnder of ...

Science
What is the function that makes hair stand up

Biology
I have a question on plant science, wondering where I can get the answer..

Science
28cm3 of a gas weighs 0.4g at STP.Calculate the molecular mass of the gas.

science(physics)
Why a minibus is more likely to topple over when the roof rack is heavily loaded than when the roof rack is empty?

science
what should soil have to suit animals which live in soil?why are these things important?hence, infer which type of soil is most suitable for soil living-things ?

science
A(n) 0.463 kg soccer ball approaches a player horizontally with a speed of 24.4 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 16.2 m/s. What is the magnitude of the impulse delivered to the ball by the ...

Science
If T represents the allele for tall pea plants and t represents the allele for short pea plants, what is the phenotype of each parent and of the offspring?

Science
What are some ideas for experiments on a dripping faucet?

Science
Female mouse has black fur(homozygous) ,male has white fur(homozygous). State their offspring’s fur color.(black color is dominant, white is recessive)

science
need help with 3 questions: 1.fossil fuels are a. a natural resource b. renewable c.made from minerals d.burned in hydroelectric plants. 2.which of the following is a renewable for of energy? i didn't have any suggestions :(

Science
A concave lens has a focal length 10cm.An object of height 2.5cm is kept at a distance of30cm from the lens .Determine the position of image & its size

Chemistry
If we were to fill a bottle with boiling hot water than place it in a bucket filled with cold water what would happen to the bottle and why? i know the bottle would get crushed inwards but whats the science behind this can someone explain?

science
which gas change the gens of the human

science
how can I convert 1% w/v to g/ml

science
Numerical problem : The dimensions of a certain water tank are 8m x 6m x 4m. What is the pressure at the bottom of the tank, if the tank is half filled?

science
concentration of[H+]ion in0.08M Ca(OH)2

math,science, geography
What are three characteristics that mid-latitude cyclones have in with all cyclones?

Physics, Science
How would the length of a day be affected if all the world’s inhabitants continuously walked in an easterly direction? When they stopped walking?

science
which of the following would decrease the human ecological footprint? 1) using bottled water instead of tap water 2) using public transportation instead of riding in a car 3) buying books instead of borrowing from the library 4) using hot water instead of cold to wash clothing...

Lesson 9: Energy and the Environment Unit Test
Science 6 A Unit 3: Energy and the Environment test I need help on it all

Science, pls help Ms. Sue!!!!!!!
an electric current is passed through water in the process of electrolysis two gases are formed one has a boiling point of -183 C and the other one has a boiling point of -253 has a chemical or physical change ocured

Science
How many moles of carbon dioxide could be produced from 220 g of C2H2 and 545 g of O2?

Arithmetic progression
In a class test some of the answers obtained by Neha in mathematics and science is 28 had she got 3 more in maths is 4 marks class in Science the product of marks in obtained in 2 subjects would have been 180. find the marks obtained is 2 subjects separately. if you found your...

Science
Has anyone took the Structures and Properties test for 8th grade. I'm a student at connections and I need help.

maths and science and geography
I describe inorganic as non-living things and organic as the living things. so help me to difference it?

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?

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