Wednesday
September 28, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science.
Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.
Wednesday, December 2, 2015 by Alexia Smith

Science
Were dinosaurs multicellular or unicellular?
Wednesday, December 2, 2015 by N/A

science
Ice cubes of total mass 6.00 grams have temperature -4.0°C. Then they are placed in 50.0 grams of water at 20.0°C in an insulated foam cup. What is the equilibrium temperature of the water inside the cup?
Wednesday, December 2, 2015 by jay

science
The distance is 12.0 km and the time is 30 km/h.what is the velocity and what is the answerg? PLEASE HELP ME👩
Wednesday, December 2, 2015 by Leslyn

phomolong secondary school
i am a grade 11 learne,i cant choose the that is good for me from the following subject history,geography,life science,sepedi,life orientation,english,math literacy.
Tuesday, December 1, 2015 by emmanuel

science
in what stage of meiosis is there single chromosomes
Tuesday, December 1, 2015 by Kennedy

science
in what stage of meiosis is there single chromosomes
Tuesday, December 1, 2015 by Kennedy

science help
One group of students is investigating the properties of charged objects. Their observations are listed below. When two positively charged objects are brought close to each other, they push each other away. When two negatively charged objects are brought close to each other, ...
Tuesday, December 1, 2015 by Oscar

science
in general, how can you distinguish whether a trait you are studying is inheritable or is the result of environmental effects?
Tuesday, December 1, 2015 by Anonymous

science
If a single gen controls the mutant trait, how will you determine the dominant and the recessive expression of the gene?
Tuesday, December 1, 2015 by Anonymous

science check please
John has a barometer for measuring atmospheric pressure as he climbs Mt. Everest . the higher he get the higher the pressure reading . is this a result he should except ? A : Yes atmospheric pressure and height are related B : No , there is no pressure from air on Mt. Everest ...
Tuesday, December 1, 2015 by kenxie

Language arts
Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snow sticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically, an avalanche happens when the gravity of ...
Tuesday, December 1, 2015 by Lang art help!

Science
A car is traveling at 65 km/hr. The brakes are applied and the car stops in 3 seconds. How far does it travel? Write down the given, unknown, formula, solution, and the final answer.
Tuesday, December 1, 2015 by Laila

science
If a 5 kg disc is rotated at 5000 rpm how much torque will be produced ??
Tuesday, December 1, 2015 by Sahajanand Jadav

Computer Science
i Need help, using loops, visual studio 2013. write a program using loops that will calculate the following, how much would $24 deposited in a bank in 1626, have been worth at the end of this year if it had received an interest rate of 6% compounded annually compounded ...
Tuesday, December 1, 2015 by Jane

Science
Someone help I'm having trouble answer this question. Explain what maria and craters are and how they formed.
Tuesday, December 1, 2015 by Octavia

Science
A car is traveling at 65 km/hr. The brakes are applied and the car stops in 3 seconds. What is the car's acceleration?
Tuesday, December 1, 2015 by Lana

science
the waves above is an electrical signal resulting from a sound wave. how does the information in this electrical signal make it to your car radio, it is carried on an FM wave by modulating its frequency,is it carried on an FM wave by its amplitude, is it carried on an FM wave...
Monday, November 30, 2015 by momma knows

Science 8
When you turn on a battery-powered flashlight, you transform A.) Heat energy into light and chemical energy. B.) Chemical energy into electrical energy and light. C.) Heat energy into chemical energy and light. D.)Electrical energy and light energy into chemical energy. Is it ...
Monday, November 30, 2015 by MathWhizza

science
besides coal and oil (fossil fuels) what type of rocks store a great deal of carbon?
Monday, November 30, 2015 by idk

Math
Ernesto drew a map of his school. He used a scale of 1 inch: 50 feet. What distance in inches on Ernesto's map should represent the 625 feet between the cafeteria and the science lab?
Monday, November 30, 2015 by Wendy

science
other than astronomy would astronomers have to study in order to discover black holes?
Monday, November 30, 2015 by lexus

computer science
In a particular phase modulation system, each symbol is able to represent 6 bits. What sort of PSK is being used plain PSK QPSK 8PSK 16PSK 64PSK 256PSK
Monday, November 30, 2015 by saima

Physcial Science
Interpreting Graphs: a. At 0oC, what is the state or states of the water in the beaker? b. At 80 s, what is the state or states of the water in the beaker? c. What did you observe about the temperature of the water inside the beaker when ice is still present? Explain. What ...
Monday, November 30, 2015 by Unknown

science
A 0.972g sample of a CaCl2*2H2O/K2C2O4*H2O solid salt mixture is dissolved in ~ 150ml of deionized water, previously adjusted to a pH that is basic. The precipitate, after having been filtered and air-dried, has a mass of 0.375 g. The limiting reactant in the salt mixture was ...
Monday, November 30, 2015 by thabiso

Science...anyone?
1. Which of these sources of energy is NOT renewable? a.) wind b.) solar power c.) hydroelectric power d.) natural gas 2. Air can be polluted by _____. a.) tiny particles of soot b.) carbon monoxide c.) sulfuric acid d.) all of the above 3. Which of the following can cause ...
Monday, November 30, 2015 by Sally

Science
Suppose the moon rotated on its axis just as quickly as earth. Would you still see the same side of the moon from earth? Please help!
Monday, November 30, 2015 by Amanda

History
7.)With the formation of the colonies came the combining of many different cultural groups. How is the influence of African slaves and Native Americans on colonial culture similar? A.)They only made small, unimportant contributions. B.)They both influenced the food, art, and ...
Monday, November 30, 2015 by YRN DJ

Science
2 spherical containers- P and Q are connected by a tap. P contains a gas at pressure 5 atm at 300K. Q contains same gas at pressure 2 atm at 400K. If tap is opened find the final pressure. Given: volume of Q is 4 times volume of P.
Monday, November 30, 2015 by Sanchit

Science plz help
Describe how community residents and authorities can prepare for an earthquake and its aftermath. Review earthquake advice from the USGS, the American Red Cross, and other agencies. If you live in an area that is susceptible to earthquakes, include suggestions specific to your...
Monday, November 30, 2015 by Aria

Science
How much force must be applied to accelaerate a 40 kg chair at 2.8m/s2?
Sunday, November 29, 2015 by Brandon

Science 7
Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait?
Sunday, November 29, 2015 by Anonymous

FRAGMENTS AND RUN-ONS
i was taking a test online, and i think they gave me the wrong answers. Here take a look at the test adn the answers if the answers are wrong, please cahnge them for me so i know the corrects answers!!! THANKS Fragments and Run-ons Post test Identify whether each group of ...
Sunday, November 29, 2015 by Adele "HELLO"

Science
In tha light wave above the property labeled A determines which characteristic of visible light? Brightness Speed Reflection Color**** The a is from the crest to the next crest and the A is in the middle of it??
Sunday, November 29, 2015 by Help please thanks

science
Circle all of the following that go through active transport. a)osmosis b)endocytosis c)diffusion d)exocytosis Please help me, I'll greatly appreciate it! :)
Sunday, November 29, 2015 by Mandy

science
Predict how the range of the projectile will change when you change the angle from 45∘, keeping the speed constant. Predict how the range of the projectile will change when you change the angle from , keeping the speed constant. A. It increases with either an increase or...
Sunday, November 29, 2015 by sharon

Science Help
i know that the half life of strontium 90 half-life is 28.8 but how can i explain this???
Sunday, November 29, 2015 by ColdBreeze23

Science
Explain why chlorine (Cl²) is a gas at room temperature, but at sodium chloride (NaCL) is a solid at room temperature.
Sunday, November 29, 2015 by Molly

Computer Science
On python/pyscripter using the turtles i have to write a program that has 3 functions: drawA(), drawB(), drawC() each draw a letter and advance the turtle on to where the next letter will begin. Once these functions are working correctly, have your program write "ABCBA&...
Sunday, November 29, 2015 by sakura

science
First, you will investigate purely vertical motion. The kinematics equation for vertical motion (ignoring air resistance) is given by y(t)=y0+v0t−(1/2)gt2, where y0=0 is the initial position (which is 1.2 m above the ground due to the wheels of the cannon), v0 is the ...
Sunday, November 29, 2015 by sharon

science
Four racecars are driving at constant speeds around a circular racetrack. The data table gives the speed of each car and each car’s distance from the center of the track at one instant. Car Speed (m/s) Position (m) A 40 20 B 40 25 C 50 20 D 50 25 Rank the cars’ ...
Sunday, November 29, 2015 by rachel

Science
Acrostic Statement from the word Bacteria pls. :)
Sunday, November 29, 2015 by Gel.

Science
How did the brightness or intensity of the light change as the degree of tilt increased? Which degree of tilt produced light similar to what North America experiences in the summer? What would be the effect on the seasons and the northern and southern hemispheres if earth were...
Saturday, November 28, 2015 by Ito

Science
How did the numbers of squares inside the outline change as the degree of tilt increased? Please help me!
Saturday, November 28, 2015 by Ito

science help PLS
When nuclear fusion begins, what can be said about the internal processes within that star? Atoms in the star begin to split. Atoms in the star begin to combine. The star is turned into a nebula. The star is turned into a blue giant. is it b
Saturday, November 28, 2015 by Oscar

Uttarpara Govt.High School,physical science
There is a solution of 50 gm Pb(NO3)2 & 75 ml boiled water.If the solution is taken to the temperature at 20°c then what quantity of Pb(NO3)2 will come out from the solution if the solubility of Pb(NO3)2 in water at 20°c is 54.
Friday, November 27, 2015 by Ayan Roy

science
1. Compare the natural greenhouse effect with the human-induced process.
Friday, November 27, 2015 by fate

literature
Sharing the names of the authors and illustrators allows children to see: A. that books are created by people. B. that books are real. C. that writing books can be a profession. D. that illustrating books can be a profession. I would think its A Having students visit a petting...
Friday, November 27, 2015 by bev

literature
Literature supports the building of a readers’s imagination because: A. readers are placing themselves into a story. B. readers relate only to what they know. C. readers are presented with an unstructured picture of life. D. readers are seeing worlds they already know. A...
Friday, November 27, 2015 by bev

literature
You can often use literature in math, science and social studies to: A. entertain kids who finish their work. B. keep students quiet after a test. C. broaden the study of a topic. D. encourage kids to read nonfiction C ?
Friday, November 27, 2015 by bev

science (I NEED BACKUP!!!)
1. Which is the most complete model of feeding relationships? a.) food web b.) food chain c.) food pyramid d.) all of the above 2. _____ eat consumers only, while _____ eat both consumers and producers. a.) Producers; carnivores b.) Carnivores; omnivores c.) Herbivores; ...
Friday, November 27, 2015 by Emilia

Science
I need to know what type(s) of research method this study used. In the study, participants were asked questions before and after receiving a treatment. The catch is that this study had no control group, so the results were gathered from comparing participants feelings before ...
Friday, November 27, 2015 by Anonymous

Science
How much graphite carbon must be burned in oxygen gas to produce 2.2 grams of carbon dioxide gas
Friday, November 27, 2015 by Isaac

science
I did a physics experiment and now i need help with the matlab fit. can someone tell me how to do this fit in matlab? a1*[sin(a2(x-a3))/(a2(x-a3)]^2*[cos(a4(x​-a3))]^2 i have a program that fits a graph to a function i just ask how to write this function.
Friday, November 27, 2015 by henry

science
an object is placed 10 cm in front of a plane mirror. where is the image formed ?how far is it from the mirror
Friday, November 27, 2015 by Anonymous

blue eagle high
maths lit,english.Lo,life science,geography,business studies I don't know what careers I should follow when doing these subjects...please help
Friday, November 27, 2015 by Lettie

science
a body having a mass of 10kg is moving with velocity of 15m/s.calculate its momentum
Friday, November 27, 2015 by raph

science
what would happen if there is no revolution?
Thursday, November 26, 2015 by jinu

Science
The town of Seaside needs to build a new power plant. The old coal burning plant produces too much pollution and is no longer safe. The mayor decides that he will do some research on alternative forms of energy like nuclear power plants and solar power plants. What types of ...
Wednesday, November 25, 2015 by Mark

Science
what are some scientific experiments ideas My teacher told me I could do a scientific experiment following the scientific method.
Wednesday, November 25, 2015 by June

science help PLS
What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? As air pressure in an area increases, the density of the gas particles in that area decreases. As air pressure in an area increases, the density of the gas...
Wednesday, November 25, 2015 by Oscar

SCIENCE PLZ HELP
2. What are the greenhouse gases? Which one is the biggest concern?
Wednesday, November 25, 2015 by coolguy456

science
A man throws over a cliff and hears it strike at the bottom in 8 second. The temperature is 25 C. what are the two times ; the time that the stone travels and the time that sound travels ? what is the height of the cliff in meters?
Wednesday, November 25, 2015 by mohamed

SCIENCE PLZ HELP
1. Compare the natural greenhouse effect with the human-induced process
Wednesday, November 25, 2015 by coolguy456

Science
Why the átomo never seen before
Wednesday, November 25, 2015 by Lucy

Computer Science
(From Lesson 17 of Blue Pelican Java) Use the following code for problems 1 – 15. In each problem state what’s printed. String s = “Lucky hockey puck”; String m = “uck”; int j = 6, z = 99; 1. int k = s.indexOf(m); System.out.println(k); 2. int k...
Tuesday, November 24, 2015 by Erinn

Phyical Science
The town of Seaside needs to build a new power plant. The old coal burning plant produces too much pollution and is no longer safe. The mayor decides that he will do some research on alternative forms of energy like nuclear power plants and solar power plants. What types of ...
Tuesday, November 24, 2015 by June

MUBANGA CHIPOYA DAY SCO SCHOOL,SCIENCE
GIVE THE UNITS IN WHICH WE MEASURE ,MESS ,WEIGH
Tuesday, November 24, 2015 by DARLINGTON

science
Hanna is comparing a rock from a riverbed and a rock deep from undergroung. one is very smooth, and the other has a very rough edges. explain why each rock was proabley found in that location
Tuesday, November 24, 2015 by HElp

Science project
Hi, can anyone please propose a science project that has to do with bacteria at a high school level. Any will do.The ones I've looked up online are mostly elementary and I had to search up college level ones..which gave the same results.
Tuesday, November 24, 2015 by Eunice

Science
a rock from a riverbed and a rock deep from undergroung. one is very smooth, and the other has a very rough edges. explain why each rock was proabley found in that location
Tuesday, November 24, 2015 by DEEZ GOT HEE

science
if all members of a specie disappears, the species is said to be.. a.)extinct b.)endangered c.)threatened D.)keystone
Monday, November 23, 2015 by gabby

Science
What would be a good way using the terms mass and weight to explain how to measure gold so it's the same on earth and on the moon?
Monday, November 23, 2015 by Patrick

Science
Why would the weight of gold be less on earths moon than it would be on earth?
Monday, November 23, 2015 by Patrick

science
Specific heat capacity of solid ethanol is 2.419 J/g C. Melting point temperature of ethanol is -114.4 C/ 158.8 K. Enthalpy of fusion of ethanol is 106.4 J/g. Specific heat capacity of liquid ethanol is 2.440 J/g C. 44.0 g of solid ethanol at -134.4 C is dropped into a Dewar ...
Monday, November 23, 2015 by Kat

science
A cube of density 12kg/m cubed is placed in a Eureka tub and releases 0.40m cubed of water. A) What is the edge length of the cube? B) What is the mass of the cube?
Monday, November 23, 2015 by bob

science
As the moon revolves around the Earth, it also rotates on its axis. Why is it that the the same side of the moon is always visible from Earth?
Sunday, November 22, 2015 by Lakshmi

Science
A rocket with mass 20000kg is launched straight upwards. the rocket experience an average drag force ( air resistance ) of 15000 N. What thrust force will be necessary for the rocket to maintain an acceleration of 4.5m/s square upwards?
Sunday, November 22, 2015 by Ralphkim

Science
The man lifted the 15 pound weight 2 feet above his head. How much work was done?
Sunday, November 22, 2015 by Hannah

science
A glass bottle has a volume of 1L and weighs 500g. When half filled with oil, it weighs 1750g. What is the density of the oil in the bottle?
Sunday, November 22, 2015 by Karen

Science
an object of size 3 cm is place 10 cm away from the convex lens find the position nature and size of the images it focal length is 7 cm.
Sunday, November 22, 2015 by Tarnan wa.vre

Science
Mg3N2(s) + 6H20 = Mg(OH)2(s) + 2NH3(g) When 2 moles of H20 react How many grams of NH3 are produced ?
Saturday, November 21, 2015 by Mohamed

science help
In the water cycle, matter moves towards the pull of gravity during infiltration and evaporation transpiration and infiltration precipitation and infiltration evaporation and transpiration is it a
Saturday, November 21, 2015 by Oscar

science help
Two scientists did the same experiment but arrived at different results. The scientists most likely did not have accurate data and information misunderstand each other's interpretations belong to different backgrounds did not have instruments to take accurate measurements
Saturday, November 21, 2015 by Oscar

science
As a result of chemical or physical reactions when heating/cooking foods: 1.will it make certain fruits(example plums,durian,banana,apple) to change from sour to sweet or vice –versa? 2.will it help to make foods that has gone slightly bad to be safer for eating? Please ...
Saturday, November 21, 2015 by munira

science
calculate the depth of salt water lake,if the pressure at its base is 16 times the atmospheric pressure.the density of salt water lake is 1,050kg m-3 and acceleration due to gravity is 10 ms-2.the atmospheric pressure is 10N cm-2
Saturday, November 21, 2015 by erekha

Science
A pistol of mass 2 kg fires a bullet of mass 50g. The bullet strikes a stationary block of mass ½ kg. if the block, with the bullet in it, moves with a velocity of 4 m/s the recoil velocity of the pistol will be?
Saturday, November 21, 2015 by Khushboo

Science
I need an idea for an essay about muscles
Friday, November 20, 2015 by PeculiarUnicorns

science help
Which of the following is a massive star that has reached the end of its stellar evolution? Neutron star Red giant Stellar nebula White dwarf is it c
Friday, November 20, 2015 by Oscar

science
a trait developed through learning is a ?
Friday, November 20, 2015 by lola

science
use the image below to think about how continental drift may have occurred. then answer the following question: according to the continental drift theory , which the following land regions should show the greatest similarities in fossil type A. east coast of south america and ...
Friday, November 20, 2015 by science help

Science
if one third of 100g of 27% aqueous sugar solution is taken in a beaker and 10g of sugar is added to it , the concentration of the resulting solution will be?
Friday, November 20, 2015 by Shivangi

science
A boy complains of stomach pain to his mother. Unable to resolve the issue herself, she takes the boy to the doctor. Which of the following might be a good hypothesis for the stomach pain?The boy fell and hurt his stomach. The boy has an infection and needs antibiotics. The ...
Friday, November 20, 2015 by john

science
calculate the heat f iodine vapours & solid are 0.031 & 0.055 cal/g respectively. If heat of sublimation f iodine is 24 cal/ g at 200°C .wat is its value at 260°C??
Friday, November 20, 2015 by sapna

Science
Please someone help me figure this one out with three reasons. A group of researchers from a local lab are trying to get funding for a research study to determine if the color blue is better than the color green. They have written a proposal and submitted to the company that ...
Friday, November 20, 2015 by Mark

Science
Thomas left the White House and traveled toward the capital at an average speed of 24 km/h. Jasmine left at the same time and traveled in the opposite direction with an average speed of 55 km/h. Find the number of hours Jasmine needs to travel before they are 59.4 km apart.
Friday, November 20, 2015 by larney

Science
A 6.90-g sample of solid NiSO4·6H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior, what volume would that steam occupy at 1.00 atm and 100.0 °C?
Thursday, November 19, 2015 by j

SCIENCE
1. Which of the following is an example of an environmental pressure? (1 point) the air pressure in the atmosphere a lake that is gradually running out of water a fight between two members of the same species breeding between two members of the same species 2. Which of the ...
Thursday, November 19, 2015 by Anonymous

science plz help
1. Compare the natural greenhouse effect with the human-induced process.
Thursday, November 19, 2015 by awesomeguy123

science help
One scientist discovered a new theory on the evolution of the universe. What is the next step for the scientist to take? A. transform the results of the theory into universal laws of nature. B. inform the scientific community so they can verify the results. C. call a press ...
Thursday, November 19, 2015 by Oscar

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