Monday
August 31, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

Science
During exercise your body's blood pressure increases as it cool down the body's blood pressure slowly returns to its normal state this is know as?
Monday, December 15, 2014 by kwangmin

Physics
Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal ...
Monday, December 15, 2014 by Anonymous

Science
Creativity is always discouraged in scientific endeavors. True or False. I thinks its true.
Monday, December 15, 2014 by Anonymous

Science
The speed of light is 3 x 10 to the 8th power meters per second. If the sun is 1.5 x 10 to the 11th power meters from earth, how many seconds does it take light to reach the earth?
Monday, December 15, 2014 by MG

Science Help!!!!
1. Which of the following types of pollution cannotbe attributed to car and truck emissions? A. Acid rain B. Sedimentation C. Ozone D. Photochemical smog 2. In which of the following places is it more difficult to determine if there is pollution? A. Aquifer B. Stream C. Air D...
Monday, December 15, 2014 by callie

Science Help!!!!
1. Running the dishwasher only when it is completely full is an example of A. Increases resource use B. Using nonrenewable resources C. Using renewable resources D. Reducing resource use 2. Cotton is a plant used to make clothing. Cotton would best fit into which of the ...
Monday, December 15, 2014 by callie

Science Help!!!!
How does using coal to generate electricity affect the enviroment? A. Using more coal reduces the amount of pollution from using oil. B. Using coal improves the quality of nearby water. C. Using coal, instead od wood from trees, helps improve the inviroment. D. Using coal ...
Monday, December 15, 2014 by callie

Physical science
What is the formula of magnesium sulfate and ammonia? My work:MgSO4 + 2NH4OH --> (NH4)2SO4 + Mg(OH)2 Correct/Balance the equation below. MgSO4 + NH4OH → (NH4)2SO4 + Mg(OH)2
Monday, December 15, 2014 by DFD

Science Help!!!!
Solar,wind,nuclear,and hydorelectric energy sources are similar in which of the following ways? A. They are all nonrenewable energy sources. B. They all require an indirect use of sunlight in order to make electricity. C. They are all considered alternative energy sources. D. ...
Sunday, December 14, 2014 by callie

Science Help!!!!
In which of the following places is it more difficult to determine if there is pollution? A. Aquifer B. Stream C. Ajr D. Pond Is the answer d?
Sunday, December 14, 2014 by callie

Science Help!!!!
Which of the following energy sources is relativelyexpensive to set up, but has a low cost once it is in place? A. Natural gas B. Coal C. Nuclear power D. Solar power Is the answer D?
Sunday, December 14, 2014 by callie

Science Help!!!!
Which of the following is used to make biomass fuel? A. Coal B. Natural gas C. Plants and animal waste D. Petroleum Is the answer C?
Sunday, December 14, 2014 by callie

Science Help!!!!
Which of the following is a source of photochemical smog. A. Fossil fuels B. Wind energy C. Biomass fuels D. Nuclear energy Is the answer A?
Sunday, December 14, 2014 by callie

Science
I am having a very had time completing this question What and how does the cell membrane regulate? What three factors influence this process?
Sunday, December 14, 2014 by Malachiae Tyler

Science
15 ml of saturated solution of potassium chloride in water at 50 degress Celsius is raised to 70 degress Celsius. How much more kcl will dissolve?
Sunday, December 14, 2014 by Brian Chum

Science
Can someone actually help me with this...? Instead of telling me to use my books... (My school does NOT give us books.!) How is incomplete dominance different than dominance? Explain why incomplete dominance only occurs in this genotype?
Sunday, December 14, 2014 by Kitty

Science 😭
How is incomplete dominance different than dominance? Explain why incomplete dominance only occurs in this genotype?
Sunday, December 14, 2014 by Kitty

science
how many cell divisions would it take to produce at least 1000 cells from one Cell?
Sunday, December 14, 2014 by Brenicia

Science Help!!!!
1. Running the dishwasher only when it is completely full is an example of A. Increasing resource use. B. Using nonrenewable resources. C. Using renewable resources D. Reducing resource use*** 2. Cotton is a plant used to make clothing. Cotton would fit best into which of the ...
Sunday, December 14, 2014 by callie

Science Help!!!!
1. Which of the following describes an example of land reclamation? A. After an area is mined for copper, the soil is replaced and new plants are planted. B. After a forest is clear-cut, desertfication occurs. C. After a forest is clear-cut, is mined for copper. D. After an ...
Saturday, December 13, 2014 by callie

science
An experiment is set up to test whether a particular insect prefer a dark or a bright environment. A chamber with a gradient in light intensity from one end (dark) to the other (bright) has been made. The experimental hypothesis is: “There will be a large difference ...
Saturday, December 13, 2014 by robert

Science
How to find Electron Configuration
Saturday, December 13, 2014 by Anonymous

Grade 9 Science
why does a planet's orbital radius represents that planet's average distance from the sun and not its exact distance?
Friday, December 12, 2014 by Thi.

Science
An airplane with a speed of 27.4 m/s is climbing upward at an angle of 48° counterclockwise from the positive x axis. When the plane's altitude is 860 m the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath ...
Friday, December 12, 2014 by Prachi

art
which of the following was true of the age of reason? a. people justified their faith using scientific principles b. people valued science over faith c. people debated the raison detre
Friday, December 12, 2014 by mr. tony

science
A polo player hits a ball with a mass of 0.42 kg with a force of 7.35 Newtons. How does the force the polo player's mallet exerted on the ball compare to the force the ball exerted on the mallet? A. The force of the mallet on the ball is equal in magnitude and opposite in ...
Friday, December 12, 2014 by Aspen

science
example of a change in state in state that releases energy
Friday, December 12, 2014 by eduarda

science
2) Which is not an example of matter? A. water B. air(i think it this one) C. gold D. sound 3) The amount of space an object occupies is called its ..... A. volume(i think it this one) B. mass C. electricity D. gravity 4) Atoms in a molecule are joined together by.. A. ...
Friday, December 12, 2014 by eduarda

Science
Pure gold can be fashioned into elaborate masks and thin plates that can be incorporated into clothing.what physical trait of metal doea this demosnstrate
Friday, December 12, 2014 by Luz

Science
When magnesium oxide (MgO) and water (H20)react, they produce magnesium hydroxide Mg(OH)2. Magnesium hydroxide is a medicine used to treat an upset stomach. The equation for this chemical change is shown below: MgO + H20 --> Mg(OH)2 if 40.00 grams of magnesium oxide and 18....
Thursday, December 11, 2014 by Bobby

Science
Name two functions of a nucleus. [I think one of them is that it contains the cell's DNA.]
Thursday, December 11, 2014 by Humanoid

science
A couple has just learned that their daughter has hemophilia. They already have a son who does not have the disease. What are the genotypes of the couple? Explain your reasoning.
Thursday, December 11, 2014 by Anonymous

Science Help
Drew is walking back up the best hill in the neighborhood 24* grade. He's pulling on the empty 2.1kg sled with a force of 18N at an angle of 55* with the hill. He's walking with a constant velocity, what is the coefficient of friction?
Thursday, December 11, 2014 by Toni

science
a 150 gram bullet is fired with a speed of 50 ms if it is stopped after hitting a target 101 meters away what is its initial KE
Thursday, December 11, 2014 by edi wow

science: question
is autoclaving same as heating the tooth?
Thursday, December 11, 2014 by PeanutJelly

Science Project: Teeth (PLEASE HELP)
How hot should water be for teeth to stay in for 30 minutes? I don't have any equipments to heat the teeth and I have check the hospital and have asked my mom.She works in the hospital there and she says they have one in the lab and I can't use it anyway. I'm ...
Thursday, December 11, 2014 by PeanutJelly

math
A total of 121 people came to the school science fair this year. This is 7 more than twice the number of people who came to last years science fair. How many people came last year?
Wednesday, December 10, 2014 by emily

Science
I have to write an argument date why the adaptation of camouflage helps a predator more than it helps a prey animal and I have to have 3 valid points. What is a good website to research this?
Wednesday, December 10, 2014 by Hayden

Science tech
What do bridges and buildings have in common ?
Wednesday, December 10, 2014 by Anabelle

Science
Bird. Trait Hummingbird Wings: Legs: Beak: Body: Penguin. .Wings: Legs: Beak: Body: why it might be beneficial for different types of birds to have different types of bodies
Wednesday, December 10, 2014 by Kory

Science
Liquid A=0.68 g/ml Liquid B=0.76 g/ml Liquid C=1.00 g/ml Liquid D=1.08 g/ml A new liquid with a density of 0.97 g/ml is poured into a graduate cylinder. Where would it layer in relationship to the other liquids?
Wednesday, December 10, 2014 by Kory

science
Lava flows from cracks in the earth and hardens into basalt, what type of rock result, is the answer sedimentary
Wednesday, December 10, 2014 by anoymous

science
Heat and pressure change rock inside the earth crust into gneiss. What type of rock result. Is the answer igneous
Wednesday, December 10, 2014 by anoymous

science
Pressure changes layers of mud into shale. What type of rock is the answer sedimentary
Wednesday, December 10, 2014 by anoymous

science
Some people that suffers from clinical depression experience feelings of tiredness and feel the need to sleep much more than usual. a. How and why is feeling of tiredness and lethargy connected to depression? b. Is it better to fight off the feeling of tiredness and sleepiness...
Wednesday, December 10, 2014 by Syadeela

science
Sandstone is exposed to extreme heat and pressure changing into quartzite. What type of rock. Is it metamorphic rock
Wednesday, December 10, 2014 by anoymous

science
Layers of mud made mostly of tiny shells and calcite crystals form the soft rock chalk. What type of rock results. Is the answer igneous rock
Wednesday, December 10, 2014 by anoymous

science
By studing rock layer scientist can learn about changes in earth formation and climate. True or false. Is the anser true
Wednesday, December 10, 2014 by anoymous

science
The remain of long dead organism may form fossils, true or false. Is the answer true
Wednesday, December 10, 2014 by anoymous

Science
Swimmers find that they can float more easily in the ocean than in freshwater pond. Explain the reason for this phenomenon
Wednesday, December 10, 2014 by Kory

Physical Science
Fill in the blanks using the correct term from the list below. Active Combustion free heating systems passive heat pump thermal energy stroke 1. A house with large windows on its south side and few windows on its other sides probably uses a(n) Blank solar heating system. 2....
Wednesday, December 10, 2014 by Lindsey

Pysical Science
The transfer of thermal energy by convention and conduction both require what? Unscramble atterm
Wednesday, December 10, 2014 by Lindsey

science
how much force is used when a 3.00 km object is moved by 51.0 kj of work?
Wednesday, December 10, 2014 by Anonymous

Science~!
What would happen to a object if the force of gravity on earth was decreased by half? A. mass would decrease b. its weight would decrease c its density would decrease d. its volume will decrease A certain object has a volume of 25.0 mL and mass of 100g whats the density of the...
Wednesday, December 10, 2014 by becky

science
why did a portion of the tabletop get cold when Natasha placed her cold drink on the table. a.the table's molecules were vibrating more slowly in that area b.the table's have spread farther apart in that area c.the table's had gained energy in that area d.(this is ...
Wednesday, December 10, 2014 by rainbowgirl

Science
Calculate the denstiy of a block if the volume is 20.0cm3 and the mass is 40.0 g
Wednesday, December 10, 2014 by Juan

Computer science
How can i use the 'Adobe Photoshop'? I am really confused how to use/edit a photo. Will ypu pls help me to know about it? Thank you
Wednesday, December 10, 2014 by Jahanara

moral science
UNSCRABLE THESE WORD..ineisfsirdne; htotvulfhgrsen
Wednesday, December 10, 2014 by mona

Introductory to Physical Science
A student drops a stopper into 50.0mL of water and the level rises to to 56.1mL. If she submerges the same stopper into a cylinder of thick syrup, what will happen to the syrup? a.) it will rise 6.1mL b.) it will rise less than 6.1mL c.) it will rise greater than 6.1mL d.) it...
Tuesday, December 9, 2014 by Anthony

Science/Math
If a student submerges a stopper with a volume of 6.1mL into a cylinder of thick syrup, what will happen to the syrup?
Tuesday, December 9, 2014 by Katie

Science
What is a black dwarf, white dwarf, protostar, neutron star and black hole
Tuesday, December 9, 2014 by Thi.

science
who discover neon
Tuesday, December 9, 2014 by edu

science
In electromagnetic waves, frequency is inversely proportional to Fast Please. I do not understand this
Tuesday, December 9, 2014 by Anonymous

science
how many h2 can be produced by 9.2 gr with h2o
Tuesday, December 9, 2014 by anxh

Science Please help
Some of the oldest rocks ever found have been estimated to be about 3.5 billion years old. Is it likely that these rocks were present when Earth was first formed? No, this rock is probably just a sedimentary rock that was formed by much younger igneous rocks. Yes, the oldest ...
Tuesday, December 9, 2014 by Monkey55

Physical Science
What is the temperature of oxygen that boils at negative 183 Celsius?
Tuesday, December 9, 2014 by Kristina

Science
How many families of elements are there Is there 9
Monday, December 8, 2014 by M

Science
What is a species that competes with polar bears for resources?
Monday, December 8, 2014 by Anonymous

science
a pipe that carries 10 gpm of liquid at 50 psi with at least 0.5 sq in area must fit through a hole thats 1.25 in in diameter.
Monday, December 8, 2014 by Anonymous

Science
How many families of elements are there
Monday, December 8, 2014 by M

Science
How to find valence electrons
Monday, December 8, 2014 by M

Science
What are the names of the periods on a Periodic Table
Monday, December 8, 2014 by M

science
Oxygen gas may be prepared by decomposing hydrogen peroxide, h2o2, using manganese (IV) oxide catalyst: 2H2O2(liquid) ----> 2H2O(liquid) + O2(gas) Calculate the amount of oxygen that will be produced from 1.35 moles of H2O2 Determine the mass of oxygen gas that can be ...
Monday, December 8, 2014 by Nat

Science
A geologist working in a national park finds a minerals. He is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe the geologist can use these items to determine some of the minerals characteristic.
Sunday, December 7, 2014 by Anonymous

science
A 7E+3 kg object is 9.29 m away from a 4.7E+8 kg object. What is the gravitational force between the two objects?
Sunday, December 7, 2014 by Brandon

Science
A geologist working in a national park finds a mineral. He is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe how the geologist can use items to determine some of the mineral's characteristics? Help...
Sunday, December 7, 2014 by Mop

science
Baseball of 0.15 kg is thrown upward at an initial velocity of 35 m/s . tow seconds later a 20 g bullet is fired at 250 m/s into the rising baseball . How high will the combined bullet and baseball rise
Sunday, December 7, 2014 by ssn

Science
What will be the effect on litmus paper when methyl amine is used?
Sunday, December 7, 2014 by Affie

science
A 170g mass attached to a horizontal spring oscillates at a frequency of 3.10Hz . At t =0s, the mass is at x= 6.60cm and has vx = − 15.0cm/s. Determine the position at t= 5.00s. The period is 0.32258 s The angular frequency is 19.478 rad/s The amplitude is 6.6448×...
Saturday, December 6, 2014 by Anonymous

Science
Baseball of 0.15 kg is thrown upward at an initial velocity of 35 m/s . tow seconds later a 20 g bullet is fired at 250 m/s into the rising baseball . How high will the combined bullet and baseball rise.
Saturday, December 6, 2014 by Ssn

m
For a preschool plan can you have a science activity for each day?
Saturday, December 6, 2014 by Anonymous

science
a 25 kg ball is trown into that air.when thrown it is going 10 m/s .calculate how high it travel
Saturday, December 6, 2014 by anshuman

science
type of element of elements of neon
Saturday, December 6, 2014 by edu

Science
A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 4.6 m waterfall. The spy’s speed is 16 m/s and the officials’ speed is ...
Saturday, December 6, 2014 by sis

Science
Which of the following describes the fundamental difference between prokaryotic and eukaryotic cells?
Friday, December 5, 2014 by Dinkleberry

science
the constant value for speed of light is 3x10to the 7 m/sec. what is the mass equivalent of 100000 N-m of energy
Thursday, December 4, 2014 by ronald

science Please Help
1. A positively charged test object is moving toward the positive source charge in an electric field. What happens next??? A. its potential energy decreases. B. Its potential energy increases. C. Its potential energy stays the same. D. Its potential energy become the negative...
Thursday, December 4, 2014 by HELP MEEEEE

science Please Help
During the process of photosynthesis, plants convert carbon dioxide and water into glucose. Covalent bonds hold the glucose molecules together. The breaking of the covalent bonds during digestion releases energy. the type of energy released is A.nuclear energy B.kinetic energy...
Thursday, December 4, 2014 by HELP MEEEEE

Science
If the original pressure of a system is 700 torr, temp 30 C and volume 100L, what will the final volume be if the pressure is increased to 750 torr and temperature to 37C
Thursday, December 4, 2014 by Belle

7th grade science
some animals, but not humans have an organ called a gizzard located near the top of their digestive tract. this organ is small and can contain small rocks. it also has thick muscular walls. based on this physical description which of the following is most likely to be the ...
Thursday, December 4, 2014 by ashley

Science
a ball with a mass of 1.50 kg traveling + 2.00 m/s collides with a stationary ball with a mass of 1.00 kg. After the collision, the velocity of the 1.50 kg ball is + 0.40 m/s. What is the velocity of the 1.00 kg ball after the collision?
Thursday, December 4, 2014 by Alex

Science
A mass of .1539 kg. moves down a 5 meter ramp in 2 seconds. What is the velocity and the KE developed by the moving mass?
Wednesday, December 3, 2014 by Hannah

science
which of the following features is most associated with the inner planets? A. rings made of ice and dust B lots of moons C large amounts of iron and silicon D thick atmospheres is it c or d?
Wednesday, December 3, 2014 by hope

Science
in what way are burning and the formation of rust alike?
Wednesday, December 3, 2014 by laiba

science
which of the following features is associated with the inner planets? rings made of ice and dust lots of moons large amounts of iron and silicon thick atmospheres
Wednesday, December 3, 2014 by hope

Science
Which of the following is a quantitative property of minerals? A.Cleavage B.Hardness C.Luster D.Streak I'm thing Cleavage or Hardness but i'm not sure can someone help?
Wednesday, December 3, 2014 by Clueless girl

science
A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one jet right after the ...
Wednesday, December 3, 2014 by Anonymous

Science
The Ka for the H2PO4–/HPO42– buffer is given by the equation: Ka= ([HPO4^-2]gamma [H^+])/[H2PO4^-]=10^-7.20 What is the pH of a 2:3 mixture of H2PO4– to HPO42– at 0.10 M ionic strength? (See the table for the activity coefficients.) I just am not sure how ...
Wednesday, December 3, 2014 by Cat

Science
Polysaccharides break apart by the process of hydrolysis and need _________ for this process. Can you please help me fill in the blank.
Wednesday, December 3, 2014 by Steph

Science
If a cheetah is able to accelerate at 15.0 m/s2 from a stand still, what speed will it reach after 2.50 seconds?
Wednesday, December 3, 2014 by Unknown

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