Friday
March 24, 2017

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Homework Help: Science

Branches of Science

Recent Science Questions

Science Earths Evolution
Tell me what you think plz 1.The Reason why it was not a solid planet yet is because Rocks or asteroids were still being formed. All there was were Dust and Tiny Particles were forming the asteroids. This was probably in the Hadean Era Because it was long ago, That’s ...
Friday, March 24, 2017 by Side Walks

Science
What causes lightning?
Friday, March 24, 2017 by Side Walks

Science
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
Friday, March 24, 2017 by Anonymous

science
Calculate the root mean square speed and most probable speed for co2 at25°c
Friday, March 24, 2017 by bikram

science
HI, I have to do a lab for heating land water and idk what it suppost to look like so if any connexus students could help me on that it wold be a1, hmu with that pay pal yak?
Friday, March 24, 2017 by Amanda

Science
Which of the following can be used to explain why fossils of the same kinds of organisms can be found in different regions of the world? biogeography adaptation continental drift dispersal** Which piece of children’s’ playground equipment could be used to model and explain...
Friday, March 24, 2017 by Anonymous

Science
Which word or phrase below best describes the function of the urinary bladder? Filter Storage tank Blender Passageway*** Help me please i am trying to check my test and make sure all the answers are right
Friday, March 24, 2017 by Help please

science
Two copper globes are floating in space with a charge of -10 and charge of +16. They come together then go back apart. What are the resulting charges
Thursday, March 23, 2017 by christy

Science I guess
So I have been reading the twilight series and I would like to know are you team Jacob or team Edward please bee nice (:
Thursday, March 23, 2017 by lily night

Physical science
Calculate the mass of carbon monoxide that was needed to produce 78 grams of methanol by the following reaction: 2H2+CO=CH3OH
Thursday, March 23, 2017 by Maria

Physical science
Determine the number of moles of sodium hydroxide produced when 2 moles of sodium and 3 moles of water react to form sodium hydroxide and hydrogen gas.
Thursday, March 23, 2017 by Maria

science
A marble at rest is dropped from the top of a building. Find the marble’s velocity after it has fallen for 3 s. Ignore air resistance. Use the formula: v = g x t, where v = average velocity, g = acceleration due to gravity and t = time
Thursday, March 23, 2017 by Charlies Timbs

Science
The development of the amniotic egg made early reptiles less dependent on water? True False
Thursday, March 23, 2017 by Jazzy

Environmental Science
How is genetic engineering similar to traditional plant breeding? A) Both processes are used to produce desirable traits in crop plants. B) Both processes involve only allowing certain individuals to breed in a population to enhance passing of certain traits to future ...
Thursday, March 23, 2017 by M, S, E

Environmental Science
Which term is used to describe when genes are transferred from one species of crop plant to another to produce desirable traits such as pest resistance? A) Selective breeding B) Genetic engineering I think the answer is A
Thursday, March 23, 2017 by M, S, E

science
Sodium nitrite is prepared by a reaction of sodium nitrate and carbon: NaNO3 + C → NaNO2 + CO2 Calculate the masses of reactants needed for the preparation of 10 g of NaNO2. Carbon is used in 10% excess. The atomic/molecular masses are: NaNO2= 69.0 g/mol , NaNO3=85.0 g/mol ...
Thursday, March 23, 2017 by Anonymous

SCIENCE
WHAT IS MEAN OF CHEMISTRY?
Thursday, March 23, 2017 by ADEGBOYEGA

Science
If a 1 tonne car travels at 16.7 m/s (60km/h) then it would have a momentum of
Thursday, March 23, 2017 by Jake

Science
What are some ways (at least two) that cells can increase their (Unicellular and multi-cellular organisms) surface area to volume ratio without splitting into multiple cells?  One way that cells can increase their surface area to volume ratio without splitting into multiple ...
Wednesday, March 22, 2017 by Sarah

Science
Which of the following would have more thermal energy? 200 mL of water at 100 degreesC or 100 mL of water at 100degreesC
Wednesday, March 22, 2017 by Logan

Science please help
What are some ways (at least two) that cells can increase their (Unicellular and multi-cellular organisms) surface area to volume ratio without splitting into multiple cells? One way that cells can increase their surface area to volume ratio without splitting into multiple ...
Wednesday, March 22, 2017 by Sarah

science
What are some ways (at least two) that cells can increase their (Unicellular and multi-cellular organisms) surface area to volume ratio without splitting into multiple cells? I am having trouble finding information on the ways.
Wednesday, March 22, 2017 by Sarah

Physical science
Explain why an endothermic reaction might cause a drop in temperature.
Wednesday, March 22, 2017 by Emily

Science
Which of the following would best explain why a species of wildflower native to Switzerland is observed growing in the wild in Montana?
Wednesday, March 22, 2017 by Bliss

Science Ecology
List at least three ways in which Grassland and Tundra biomes are similar.
Wednesday, March 22, 2017 by Parker

science plz help
1. You are studying an evergreen tree that produces cones. The tree is a(n) (1 point) angiosperm. gymnosperm. gametophyte. monocot. 2. Which of the following is an angiosperm? (1 point) yellow and red flower fern branches pine tree with pine cones yellow moss 3. In ferns, the ...
Wednesday, March 22, 2017 by nessa

science
A person claps his hands near a cliff and hears the eco after 2 seconds if the speed of the sound in air is 340m/s find the distance of the cliff from the percent
Wednesday, March 22, 2017 by shruthi

Science
Two students discover that 500g of water occupies a volume of 50mL. Is this result correct? Explain your answer.
Wednesday, March 22, 2017 by Anonymous

Science
why dont monocot and dicot have the same arrangements of vascular tissues
Tuesday, March 21, 2017 by Paris

Science
For this activity, we had to make cube shaped models to represent cells. Then we had to compare surface area, volume, and surface area to volume ratio (SA:V) between the cells.  Cell A:  length of one side=1cm  Surface area= 6cm^2  Volume= 1cm^3  SA:V= 6  Cell B:  ...
Tuesday, March 21, 2017 by Sarah

Science
Two students discover that 500g of water occupies a volume of 50mL. Is this result correct? Explain your answer.
Tuesday, March 21, 2017 by Anonymous

Science
Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens. The earth moves in its orbit, so the direction facing away from the sun changes during the year. We only see stars in the ...
Tuesday, March 21, 2017 by Stars

science
For this activity, we had to make cube shaped models to represent cells. Then we had to compare aurafve area, volume, and surface area to volume ratio (SA:V) between the cells. Cell A: length of one side=1cm Surface area= 6cm^2 Volume= 1cm^3 SA:V= 6 Cell B: Length of one side...
Tuesday, March 21, 2017 by Sarah

science
What property must a substance have if you want to use the substance to make aqueous solution
Tuesday, March 21, 2017 by phil

science
if two balls made of iron and aluminum of equal volumes are immersed in a liquid, then will they experience equal upthrust?
Tuesday, March 21, 2017 by xxx

Science
Time taken by CO2 gas to diffuse 5000km distance is 2sec.Find the time taken by Cl2 gas to diffuse the same distance.
Tuesday, March 21, 2017 by Mahida Aayushi

SCIENCE
If 5 equal pieces of 25 ohm (omega) is joined in parallel then what is the equivalent resistance of IS ?
Tuesday, March 21, 2017 by ZEELL

Science - hyperthyroidism
Hello, Can someone explain to me how does negative feedback loop work with a person whose condition is hyperthyroidism? How does graves disease effect the homoeostasis of the thyroid function and its production of hormones I am reading the book but it does not make sense at all.
Monday, March 20, 2017 by John

science, maths
Why are electric field lines perpendicular at a point on an equipotential surface of a conductor .
Monday, March 20, 2017 by neeraj sunthwal

maths , science
Two point charges q and -2q are kept 'd' distance apart . Find the location of point relative to charge 'q' at which potential due to this system of charges is zero.
Monday, March 20, 2017 by neeraj

Science
What type of boundary is an earthquake? I think it is either Transform or Divergent.
Monday, March 20, 2017 by Please Help !!!!

Science
A reaction has a standard free-energy change of –11.70 kJ mol–1 (–2.796 kcal mol–1). Calculate the equilibrium constant for the reaction at 25 °C. Im so lost please help
Monday, March 20, 2017 by Roberto

Science
What are the uses of reactivity series??
Monday, March 20, 2017 by Dheeraj Parmar

Science
A wreaking ball has a mass of 315 kg. It it is moving at a speed of 5.12 m/s what is its kinetic energy?
Monday, March 20, 2017 by Mileena

Science @ MS SUE !
what are some advantages of using renewable energy sources instead of fossil fuels ???????????
Monday, March 20, 2017 by Young Trippy Lil G

Science 6
When striking a match what type of energy is represented? A thermal B chemical potential C mechanical D electromagnetic I think the answer is b Thank you
Monday, March 20, 2017 by Jaden

Science
Mount St. Helens, the Great Lakes, and Death Valley are physical features of the earth. What is the scientific term used to describe these features? A. cartography B. topography C. geology D. contourology
Monday, March 20, 2017 by Solomon

SCIENCE
When you turn on a television, you transform electrical energy into what types of energy? 1) heat energy 2) light energy 3) elastic potential energy 4) sound energy I THINK #1 ,#2 #4 Thanks for your help.
Monday, March 20, 2017 by Evelyn

science
A gas sample has a volume of 150ml when the pressure is 175kPa. If the temperature and amount of gas remains constant, what volume will the gas sample occupy at a pressure of 120 kPa
Monday, March 20, 2017 by Anonymous

Science
If 2.4g of magnesium burns in oxygen to produce 4.0g of magnesium oxide, Write a balanced equation for the reaction
Monday, March 20, 2017 by Clinton

Mathematics for social science
1.There are 20 people in a club. In how many ways can the club elect a president, a secretary and a treasurer, on person can hold more than one office? 2. How many ways can a committee of 4 people be selected from a group of 10 people?
Sunday, March 19, 2017 by Pacula

science
Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really considered a part of Earth’s ...
Sunday, March 19, 2017 by bob

science
Which statement about fungi is true? a. Fungi are producers b. Fungi cannot eat or engulf food c. Fungi are found only in soil d. Fungi are primarily single celled pls no bad comments
Sunday, March 19, 2017 by coolkid

Science
Let me know if these are biotic abiotic or both Mushrooms,Desert, temperature, mold ,hair,ocean ,trees,rocks, gold plastic, oxygen, tundra
Sunday, March 19, 2017 by Joshua Newall

science
. A runner jumps over a hurdle. Neglecting friction, the potential energy of the runner at the highest point compared to his kinetic energy at the lowest point is
Sunday, March 19, 2017 by james

SCIENCE
Why is it hot to touch to an incandescent bulb?? Please reply fast. Thank you in anticipation.
Sunday, March 19, 2017 by Aarti

science
If eye color is determined by 4 possible genetic combinations,RR-Brown/RL-Brown/LR-Brown/​LL-Blue,what percent of the possible genetic combinations are carriers for the Blue-eyed offspring?
Saturday, March 18, 2017 by Anneliese

Science
Mass of iron cube having edge length 1.8m is 70g.Find it's density.
Saturday, March 18, 2017 by Anonymous

science
2 lenses in contact of power 3D and -5D form a composite lens. An object is placed around a distance 50 cm from this composite lens,find the position of the image.
Saturday, March 18, 2017 by Reet

science
5N*2m=
Saturday, March 18, 2017 by mita

Science
The linear magnification produced by a spherical mirror is -1.Analysing this value state the type of the mirror and position of the object with respect to the pole of the mirror. Draw the ray diagram to justify your answer.
Saturday, March 18, 2017 by Snem

science, Health
RATE of diffusion must be expressed as number of particles moved per unit time. Write this as a word. Can you please teach me this?
Saturday, March 18, 2017 by apple

science
While conducting the experiment to measure the weight of water displaced by the body precaution should be taken to immerse the solid in water without touching the walls or bottom of the container. Why?
Saturday, March 18, 2017 by seeyue

science
If two balls made of iron and aluminium of equal volumes are immersed in a liquid then will they experience equal up thrust? Justify your answer.
Saturday, March 18, 2017 by esthar

science
A ball is projected vertucally upward from ground with avelocity of 20m/s .How high willit go.a 5m b10m c15m d20m e25m correct options of this question.
Saturday, March 18, 2017 by Zehara

science
A ball is projected vertucally upward from ground with avelocity of 20m/s .How high willit go.a 5m b10m c15m d20m e25m correct options of this question.
Saturday, March 18, 2017 by Marvi

Science
Two point charges q1=4uc& q2=9uc are placed 20cm apart.the electric field due to them will be zero on the line joining them at a distance of
Saturday, March 18, 2017 by Nosheen

Science
Compare lunar and solar eclipses and answer the following questions: How does a lunar eclipse happen? How does a solar eclipse happen? Which one occurs more often?
Friday, March 17, 2017 by Help I need somebody not just anybody

science
The wood thrush is a bird species that lives in deciduous forests in North America. Wood thrushes nest in tall trees, forage for insects and snails in decaying leaf litter on the forest floor, and drink water from nearby freshwater sources. Identify one biotic factor and one ...
Friday, March 17, 2017 by mackenzie

science
Two charges repel each other with a force of 10-5newton when they are 20cm apart. what is the force on each of them are i 3cm apart and ii when they are 100cm
Friday, March 17, 2017 by physics

science
An object 4.0cm in height is placed at a 25cm from a concave mirror of focal length 15cm.find the position, nature, and size of image formed.
Friday, March 17, 2017 by seerat

Science
If 5 equal pieces of 25 ohm (omega) is joined in parallel then what is the equivalent resistance of it. Is it 5 or 1.please urgent
Friday, March 17, 2017 by Sanjay

physical science
an object has 2.0x 10^19 more electrons than protons. What is the net electric charge of this object in coulomb?
Friday, March 17, 2017 by fred

physical science
a cars radio draws 0.25 A of current in the autos 12 volt electrical system. How much power in watts does the radio use?
Friday, March 17, 2017 by fred

Science
Water is a(n) what factor in all ecosystems that all living things require.
Thursday, March 16, 2017 by Trying to be a Science geek

Science
How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences.
Thursday, March 16, 2017 by Justin

Science
Roseate spoonbills are wading birds that live in the Everglades of Florida. These birds eat a diet of shrimp fish amphibians and aquatic plants. Which of the following sets of words can be classified for these species? A. Autotroph omnivore predator B. Heterotroph herbivore ...
Thursday, March 16, 2017 by CanYouHelpMe

science
A kid kicks a soccer ball of mass 430g so that the ball moves on a flat rough ground at a velocity of 16m/s towards a stairway. The ball experiences a constant frictional force of 5N over a distance of 200cm. it then hits the stairway and collides elastically with the edge of ...
Thursday, March 16, 2017 by khosi

SCIENCE
a geneticist is studying a pedigree that shows the family history of a recessive genetic disease. which of the following pedigrees shows an impossible relationship.
Thursday, March 16, 2017 by PLEASEEE HELLP OR ILL FAIL

library science
Factors Affecting the Development of Information resources and services
Thursday, March 16, 2017 by Lawan Abdullahi

Science
What would be the effect on the seasons and the northern and southern hemispheres if Earth were not tilted?
Wednesday, March 15, 2017 by Help I need somebody not just anybody

science
what is the molar ratio between barium hydroxide and potassium hydrogen phthalate if they were reacted together in an acid base titration
Wednesday, March 15, 2017 by Jake

science
An automobile travelling at 80km per hours has tyres of radius 80 cm. On applying brakes the car is brought to a stop in 30 complete turns of the tyres. What is the magnitude of the angular acceleration of the wheels how far does the car move while the brakes are applied
Wednesday, March 15, 2017 by gobind

science
A truck of mass 2000 kg moving on a highway experience an average frictional force 800 N. il its speed increase from 25m / s to 35m/s over a distance of 500m. What is the force generated by truck
Wednesday, March 15, 2017 by gobind

science
A bullet of mass 20g travelling at speed of 350m per second strike a steel plate at an angle of 30degree with the plane of plate it ricochets off at the same angle at a speed of 320m per second what is the magnitude of impulse that the steel plates gives to the projectile if ...
Wednesday, March 15, 2017 by gobind

science
A bullet of mass 20g travelling at speed of 350m per second strike a steel plate at an angle of 30degree with the plane of plate it ricochets off at the same angle at a speed of 320m per second what is the magnitude of impulse that the steel plates gives to the projectile if ...
Wednesday, March 15, 2017 by gobind

Science
What abiotic and biotic factors might limit population size and mono lake?
Wednesday, March 15, 2017 by Lily

Science
How are the primary pigments related to the primary colors? The primary pigments are: A. Complementary to the primary colors B. Associated with the primary colors C. Unrelated to the primary colors Is the answer A?
Wednesday, March 15, 2017 by Anonymous

Physical Science
Find the hydroxide-ion concentration in an aqueous solution when the hydronium-ion concentration is 1×10^−10M. Recall that 10^a×10^b=10^(a+b). Express your answer to one significant figure and include the appropriate units.
Wednesday, March 15, 2017 by Hannah

Physical Science
Find a hydroxide-ion concentration in an aqueous solution having a pH of 2. Express your answer using one significant figures. I thought the answer was 1*10^-2, but I have no clue what I am doing wrong.
Wednesday, March 15, 2017 by Hannah

Science
A professional baseball player pitchers a ball giving it a velocity of 45m/s towards the butter. The batted ball has a velocity of 30m/s towards the pitcher. Let the direction from the batter to the pitcher be the positive direction. If the change in velocity takes place over ...
Wednesday, March 15, 2017 by Mileena

Science
In the record setting race, a dragster reached a velocity of 145.08 m/s in 4.48s. What was the dragsters average acceleration? Assume that the direction of the velocity is positive.
Wednesday, March 15, 2017 by Mileena

Science
The image above shows the movement of a wave over three seconds. What is the frequency of the wave? A. 2 hz B. 5 hz C. 1 hz D. 3 hz
Wednesday, March 15, 2017 by Anonymous

SCIENCE
Barry used a ramp to transport a load to a truck. The ramp made work easier by : 1) reducing the size of the input force 2) reducing the input force to zero 3)changing the distance over, which the input force was exerted 4) reducing the output force to zero I think #3
Wednesday, March 15, 2017 by Evelyn

Science
My sister plays her PS4 all day and whenever her remote vibrates while it's sitting on the couch, I can feel the vibration from a different seat. I don't understand how the vibration of a little remote can move throughout a whole, large couch.
Wednesday, March 15, 2017 by Gabe

SCIENCE
The handle of a tennis racket is enclosed in rubber. What is the function of the rubber handle? 1)to increase energy 2)to increase weight 3)to increase friction 4)to increase force I think # 3
Wednesday, March 15, 2017 by Evelyn

science
how many grams of nacl are required to neutralize 100 ml of 1M h2so4???
Wednesday, March 15, 2017 by Chemistry

Science
Draw a dot plot representative of a flow cytometry test that looks at two markers. One marker is diagnostic, while the other marker is prognostic. Identify and name your markers and their detecting antibodies. Complete the plot as you wish and correctly interpret it. 
Tuesday, March 14, 2017 by Moe

Science:Just need quick help
I am very tired and can hardly think straight. Thanks in advance to those who help. The amount of each size particle in soil is the particle size distribution. Is putting soil and/or sand in a bottle of water a good way to determine particle size distribution? Why or why not?
Tuesday, March 14, 2017 by Tori

Science (HELP ASAP)
1. Which of these is not an environmental effect of building dams A. Reduced fertility downstream<<< B. Weed growth downstream C. Increased water temperature D. Soil erosion upstream 2. Which of these is not an environmental effect of destroying wetlands A.smog B....
Tuesday, March 14, 2017 by Ashley

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