Monday
August 31, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

Science
What will the sound of speed be in air if temp is 10 degrees Celsius.this is crickets looking for e plantation on equation
Wednesday, March 4, 2015 by Lucy

science
a ball falls on a horizontal from a height h,if the coefficient of restitution be e,find the distance before it will stop
Wednesday, March 4, 2015 by arka

7th grade science
how much work is done on an object with 25 kg on earth if it moves 13m? i really need help
Tuesday, March 3, 2015 by KVNG J

Science
What is another example of a gas in your classroom? I know air would be one but I can't think of what would be another one present in a classroom. Thanks...
Tuesday, March 3, 2015 by Brandi

Science 8th Grade
1. How Will resistance change when the voltage increases in an electrical circuit if the current remains constant A. It will decrease **** B. It will stay the same C. It will increase D. It will decrease, then increase
Tuesday, March 3, 2015 by *

Earth Science
What color will a star be with a surface temperature of 5000–6000 K? A. blue B. yellow C. white my choice is B yellow
Tuesday, March 3, 2015 by Emi

Science
Human Body & Disease Practice 1) Which of the following effects would you expect if red blood cells were shaped like neurons? :They would not be able to move as easily through capillaries.*** :They would more easily carry out gas exchange in the alveoli. :They would not need ...
Tuesday, March 3, 2015 by TheLOUDEST_0430

Science
Name and explain in detail four organizations or agencies that work to address human violations
Tuesday, March 3, 2015 by Petunia

Earth Science
Which of the following is NOT generally associated with a thunderstorm? A. tornado B. lightning C. dry air
Tuesday, March 3, 2015 by Emi

american Literature check answers
How were the Dark Romantics different from the Transcendentalists? They explored the darker sides of the human soul. They revered reason over intuition or imagination. They believed in the innocence of all people. They disregarded any spiritual side of nature. A Emerson ...
Tuesday, March 3, 2015 by jimm

physical science
A stone of 8 kg mass falls from the top of an 80 m-high building. Find the velocity of the stone when it reaches the ground
Tuesday, March 3, 2015 by tye

science
what are four kinds of speed
Monday, March 2, 2015 by pernell

Science
A neutralization reaction between an acid and a base produced the salt Na2CO3. What acid and what base participated in this reaction? ---------------- Sorry about just asking without showing work or anything, but I don't really get the concept of this and how I should go ...
Monday, March 2, 2015 by Anonymous

Science // Chemistry
How many grams of KOH are needed to make 1.00L of a 1.3 molar (1.3 M) solution? ------------------ I am not sure how to start this question, my teacher wants us to use conversion factors and write it out but I don't get how I am supposed to start it.
Monday, March 2, 2015 by Anonymous

Science
What is the mass in grams of 24.32 moles of CaCO3? So far I got: 24.32mol CaCO3 x 100.09gCaCO3 / 1mol CaCO3 = I am not sure if this is correct, because I got a really big number and I feel like I am missing something in the question.
Monday, March 2, 2015 by Anonymous

Science
What are the classification of a Emerald Rock?
Monday, March 2, 2015 by Mo

Science
.100 KG of an unknown metal at 94°C is placed in 100 g of water at 10°C the final temperature of the metal and water are at 70°C what is the heat capacity of the unknown metal
Monday, March 2, 2015 by Michaela

Science
A piece of copper at 90°C is added 2.200 KG of water at 15°C inside an aluminum calorimeter that has a mass of .100 KG the final temperature of the copper water and calorimeter is 25°C what is the mass of the copper piece
Monday, March 2, 2015 by Michaela

Science
.100 KG piece of metal is heated to 480°C and then quickly place in .250 KG of water at 20°C which is contained in a .200 KG aluminum calorimeter the final temperature of the water metal and calorimeter is 36°C what is the specific heat to Capacity of the metal piece
Monday, March 2, 2015 by Michaela

Science for ms. Sue
If you were to walk towards a Van der Graaf generator, the effect of its electric field would get weaker as you got closer to it. A.True B.False I think it is A
Monday, March 2, 2015 by Naomi

Physical science
What is apparent weightlessness?
Monday, March 2, 2015 by Thando

science
Part I: Units of Measurement for Gas Laws For the following questions, use the following answer choices to indicate what each unit of measurement is used to measure (pressure, volume, or temperature). 1. atm 2. kPa 3. L 4. oC 5. torr 6. K 7. mL 8. cubic centimeters (cm3) ...
Monday, March 2, 2015 by Alex

Physical science
The diameter of the planet saturn is 10 times that of the earth but the mass of the planet is only 90 times greater than that of the earth.what isthe gravitational acceleration(or number of 'gs'you"ll feel)on saturn?
Monday, March 2, 2015 by Thando

Science
The Women's Movement Quiz 1) In the 1800s, there was a wave of religious fervor known as the... :Religious Right. :Second Great Awakening.*** :Religious Awakening. :Revival Times. 2) What movement called for drinking little or no alcohol? :Transcendentalist. :Utopia ...
Monday, March 2, 2015 by TheLOUDEST_0430

science
I need help checking my answers. the * stands for my answer some of them im not sure about my orginal answer for 2 was b but I changed it to a. 1. which of the following planets is considered a rocky, or terrestrial, planet? venus neptune saturn uranus * 2. which of the ...
Monday, March 2, 2015 by watguy!!!

science
A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction
Monday, March 2, 2015 by Maria

Earth Science
Which of the following organisms is most likely to survive? A. the top carnivore in a food chain B. a herbivore in a food chain C. the top carnivore in a food web
Monday, March 2, 2015 by Emi

To "WOK..."
Please put your School Subject in the School Subject box (Examples: math, science, algebra, geography). When all you put is one letter, most tutors are not inclined to open your post since you are not following instructions.
Monday, March 2, 2015 by Writeacher

please assist me with science
1.a car moves at a constant velocity up an inclined plane angle of 28 degrees with the horizontal.The coefficient of friction is 0.387. The force exerted by the engine on the car is 588N... A.Calculate the of the car? B. Frictional force acting on the car
Monday, March 2, 2015 by Johanna

science
1 . A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction
Monday, March 2, 2015 by Maria

Environmental Science
Over the past 20 years in the United States, nuclear power production?
Monday, March 2, 2015 by Dee365

Science
One light bulb in a string of lights goes out this causes all other lights in string to go out. This is example of A. Resistor B. parallel circuit C. Closed circuit***** D. Series circuit When a switch is turned from the off to the on position it is changing the circuit in ...
Sunday, March 1, 2015 by BUBBLES

science
a particle 100g attach with a horizontal spring moving s.h.m.with amplitude 5cm .when this particle is passes through mid point a small particle placed on it then both moving s.h.m.with amplitude 4cm.find the mass of small particle .
Sunday, March 1, 2015 by Jamal

science
Na2 SO4 + Ca Cl----> Ca SO4 +Na Cl
Sunday, March 1, 2015 by tyler

science
A sandbag falls from a hot air balloon that is rising with a constant velocity of 15m.s 1)What is the acceleration of the bag the moment it fell from the hot air balloon? 2)What is the acceleration of the hot air balloon the moment the sandbag fell from it? 3)What is the ...
Sunday, March 1, 2015 by PHYSICS

science
what is the balanced chemical equation for (NH4)2SO4 + CuSO4.5H2O?
Sunday, March 1, 2015 by Bonga

maths lit,civil technology,egd,physical science
Can i possibly be accepted for land surveyor if am doing these subject
Sunday, March 1, 2015 by neliswa

Statistics
Science scores for high school seniors in the United States are normally distributed with a mean of 78 and a standard deviation of 10. Students scoring in the top 10% are eligible for a special prize consisting of a laptop and $2,000. What is the approximate cutoff score a ...
Saturday, February 28, 2015 by JOE

Earth Science
Which of the following does NOT occur at a convergent boundary? A. The leading edges of both plates are bent downward. B. Oceanic crust is pushed down into the mantle. C. One continental plate moves into an oceanic plate. I think it's C
Saturday, February 28, 2015 by Emi

Science
Describe the total momentum of billiard balls before and after the cue ball collides with another ball
Saturday, February 28, 2015 by John

probability
This figure below describes the joint PDF of the random variables X and Y. These random variables take values in [0,2] and [0,1], respectively. At x=1, the value of the joint PDF is 1/2. (figure belongs to "the science of uncertainty) 1. Are X and Y independent? NO 2. ...
Saturday, February 28, 2015 by RVE

probability
For each one of the following figures, identify if it is a valid CDF. The value of the CDF at points of discontinuity is indicated with a small solid circle. (original images belonging to: "The science of uncertainty") 1. No, it is not a valid CDF 2. Yes, it is not a...
Saturday, February 28, 2015 by RVE

Science
Organs like the liver, lungs, and intestines, each perform a specific job. COMPARE AND CONTRAST: How are the organs in a model of a human body the same and how are they different? Thx!!
Saturday, February 28, 2015 by Kyle

science
If an object is thrown 60m into the air and it takes the object 6s to get there what's there average speed of the object
Saturday, February 28, 2015 by Jay

Earth Science - Please Check My Answer
Please help with the following: How does sleet differ from snow? A. It is not a form of precipitation. B. It is liquid and not ice. C. It starts as rain and freezes in the air. D. It starts as water vapor and changes to a solid. I know that answer is not D because I got it ...
Friday, February 27, 2015 by Brady

Physical Science
The main difference between the internal combustion engine and the diesel engine is that the diesel engine A. does not have a crankshaft. B. does not utilize pistons. C. has no connecting rods. D. has no ignition system. pretty sure its d
Friday, February 27, 2015 by Dave

science 101
What is the difference between the way matter responds to a transverse wave and a longitudal wave? A. Matter moves in the same direction in a longitudal wave, and at right angles to the direction of a transverse wave. B. Matter moves at right angles to the direction of a ...
Friday, February 27, 2015 by LOL 101

science
20 g of K3PO4 dissolved in 350 ml water,to come up with 500 ml solution. calculate : molecular weight Equivalent weight molarity normality molality
Friday, February 27, 2015 by doa'a

Science check
Water in the upper zones of the ocean will have more oxygen than water in deeper zones. true or false i think true.
Friday, February 27, 2015 by Danny

science
please Ineed Atomic mass for the element in periodic table.
Friday, February 27, 2015 by doa'a

science
mountain bike wheel has diameter of 40 inches , in how many turns will the bike be able to cover 1 km? note : circumference of circle = pi ((radius)^2) radius = diameter/2
Friday, February 27, 2015 by doa'a

Science
A train is traveling west with a force of 820 N, and then the conductor applies the brakes with a force of 500 N. What is the resulting net force on the train?
Friday, February 27, 2015 by Natalia

PSYCH
1 Which of the following is NOT one of the three fundamental features of science? a empirical questions b public knowledge c mathematical equations (My Answer) d systematic empiricism 2 A set of beliefs can be said to be pseudoscientific if it lacks one or more of the three ...
Friday, February 27, 2015 by Check My Answers for me please

Science
Hormones and Homeostasis 1) The human endocrine system is made up of which of the following structures? :Vessels. :Receptors. :Glands.*** :Chambers. 2. Which of the following best describes the function of the endocrine system? :It secretes chemical messengers that travel ...
Friday, February 27, 2015 by TheLOUDEST_0430

Psychology
1 Which of the following is NOT one of the three fundamental features of science? a empirical questions b public knowledge c mathematical equations (My Answer) d systematic empiricism 2 A set of beliefs can be said to be pseudoscientific if it lacks one or more of the three ...
Friday, February 27, 2015 by Jordan Please Help Check My Answers

Maths literacy,life science,physical science,consu
careers for this subjects
Friday, February 27, 2015 by nomaphelo

Please help asap science
1.an engine develops 65kW over a period of 20minutes. The engine uses 5kg of petrol. Calculate the following:- A. The heat gegenerated B. The power generated by the petrol C. The efficiency Of the engine 2.A square steel plate with sides of 12cm long, is heated and the change ...
Thursday, February 26, 2015 by Bettina

science please help asap
2. A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction 3.a force of 318.123N accelerates a car at 3m/s^2 from rest for ...
Thursday, February 26, 2015 by Buhle

science
A person brings a cup of hot tea which is 170 degrees F into a room that is 65 degrees F and places a metal spoon which is 65 degrees F into the hot tea What happens to the temp. of the hot tea,the spoon and the air in ten minutes?
Thursday, February 26, 2015 by Rebecca

science and calculation
50 gram of steel at 100 degree centigrade is addae to 100grame of water at 30 degree centigrade the resultant temperature is 35 degree centigrade find the specific heat of metel
Thursday, February 26, 2015 by Anonymous

Earth Science
2.   The Moon is made up of minerals similar to those on Earth, which are  A. rilles. B. lunar breccias. C. silicates. D. highlands. I am thinking either B or D?
Thursday, February 26, 2015 by Sarah

Science
What is a conducter
Thursday, February 26, 2015 by Bob

Please help and explain engineering science n3
car moves at a constant velocity up an inclined plane making an angle of 28degrees with the horizontal. The coefficient of friction is 0.387. The force exerted by the engine on the car is 588N. Calculate the Following A.weight of the car B.frictional force acting on the car
Thursday, February 26, 2015 by Buhle

Science
Processing Information 1. Which of the following sets of terms could be used in a description of the peripheral nervous system? :Motor neuron, interneuron, sensory neuron.*** :Brain, sensory neuron, myelin. :Interneuron, spinal cord, autonomic. :Somatic, brain, spinal cord. 2...
Thursday, February 26, 2015 by TheLOUDEST_0430

Life science
Mortality
Thursday, February 26, 2015 by Rabelani

Science
90 calories of heat is added to 1 gram of fresh water with an initial temperature of 10 degrees Celcius. What is the final temperature of this liquid? (latent heat of fusion = 80cal/g°C, latent heat of vaporization = 540 cal/g°C)
Thursday, February 26, 2015 by melissa

Science
Why didn't the outer planets lose the lighter gases in their atmospheres? I really need help if you could explain this to me. I'm begging you.
Thursday, February 26, 2015 by April - Science Help

science please help asap
1. A 2. A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction 3.a force of 318.123N accelerates a car at 3m/s^2 from rest for ...
Thursday, February 26, 2015 by Buhle

school of science and tech
Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Sove for c 3
Thursday, February 26, 2015 by Anonymous

science
when astone is thrown slighty above amoving lorry .where will the stone fall? .2.when loam soil is mixed with sandy soil .what will not change?
Thursday, February 26, 2015 by peter

science
build a circuit containing two resistors that are in series with each other. This circuit also contains two light bulbs that are in parallel to each other, but are in series to the resistors. Connected this to two batteries that are in series with each other. I know you can&#...
Wednesday, February 25, 2015 by thez

science
How much work does spike do when he pulls a 50 kg sled with a force of 200 N with a rope at an angle of 30 degrees above the horizontal, 20 m?
Wednesday, February 25, 2015 by katie112

science
How much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room?
Wednesday, February 25, 2015 by Sophia

Science
Why does atmospheric pressure usually decrease when humidity increases?
Wednesday, February 25, 2015 by Daniela

science
What will happen when I put in minty mentos into all different kinds of soda?
Wednesday, February 25, 2015 by Ashley

chemistry
The following equilibrium exists in a closed container: N2(g) + O2(g) = 2NO(g), ΔH = +181 kJ/mol. Which of the following perturbations would favor the formation of NO(g)? (practice MCAT question from The Princeton Review MCAT Science Workbook, 2009 edition) increasing the...
Wednesday, February 25, 2015 by danny

Science
Chargers extend the life of the rechargeable batteries by: A) adding protons to the positive electrode B) adding electrons to the positive electrode C) moving electrons back to the positive electrode D) Moving electrons back to the negative electrode
Wednesday, February 25, 2015 by Sammy

science
Explain what might have happened in Ruthford's experiment if he had used a thin sheet of copper instead of a thin sheet of gold
Wednesday, February 25, 2015 by cassie

Science
Reflecting telescopes are popular because they're A. more durable than a refracting telescope. B. easier to build than a refracting telescope. C. smaller than a refracting telescope. D. more powerful than a refracting telescope i said b but im torn between a and b
Wednesday, February 25, 2015 by Dave

Science
A sled and rider with a combined weight of 59 kg are at rest on the top of a hill 24 m high. (a) What is their total energy at the top of the hill? (b) Assuming there is no friction, what would the total energy be on sliding halfway down the hill?
Wednesday, February 25, 2015 by holly

science
Climate change studies suggest the worst impacts will be felt by the wealthiest people
Wednesday, February 25, 2015 by lolita

Probability
The joint PMF, pX,Y(x,y), of the random variables X and Y is given by the following table: (see: the science of uncertainty) 1. Find the value of the constant c. c = 0.03571428571428571428 2. Find pX(1). pX(1)= 1/2 3. Consider the random variable Z=X2Y3. Find E[Z∣Y=&#...
Wednesday, February 25, 2015 by RVE

science
A reflecting spherical Christmas tree ornament has a diameter of 12 cm. A child looks at the ornament from a distance of 18cm. A ... image will form at ... from the ornament
Wednesday, February 25, 2015 by zee

science
A reflecting spherical Christmas tree ornament has a diameter of 12 cm. A child looks at the ornament from a distance of 18cm. A ... image will form at ... from the ornament
Wednesday, February 25, 2015 by zeeshan

science
1.a modern train traveling at a constant speed around a circular track has a constant velocity true or false 2.which of the following would be affected if a soaring eagle change direction but remained at a constant speed? A.acceleration only B.velocity only C.acceleration and ...
Wednesday, February 25, 2015 by Hannah

Science
After returning from her morning walk, Laura states, "It is cold outside." What kind of statement is this?
Wednesday, February 25, 2015 by Alexgc

Earth Science
Hubble said that stars are moving away from the Earth because they have more of what color? Blue, Green, Red or Violet
Wednesday, February 25, 2015 by Alexgc

Science
A scientist wants to make their experiment more accurate. Which of the following should they do to ensure this. decrease their sample size nothing; there is no way to increase the accuracy of an experiment increase their control amount increase their sample size
Wednesday, February 25, 2015 by Alexgc

physical science
If the mans weight is 490N on earth,calculate his weight on the moon that has the gravitational force 1/2 of the gravitational force of the aerth
Wednesday, February 25, 2015 by nelson

science
two small spheres lie 1.5 meters apart and carry identical charges. How large is the charge on each if a sphere experiences a force of 2.0 N.
Tuesday, February 24, 2015 by Matthew

fundamentsl concepts ans skills
An approach to literacy connects, for example, mathematics and science to the real world. Such a process of combining subjects is referred to as A. logical grouping. B. cardinality. C. grouping. D. curriculum integration. I believe is a.
Tuesday, February 24, 2015 by lauren

Science
Describe the pattern of regional surface winds around the center of a low pressure system in the northern hemisphere?
Tuesday, February 24, 2015 by Daniela

Earth Science to Ms.Sue (urgent )
18.   The Cenozoic Era is also referred to as the  A. Age of Dinosaurs. B. Age of Mammals. C. Age of Fish. D. First Era. B???
Tuesday, February 24, 2015 by Sarah

science~Ms. Sue
A ____ is a substance that cannot be separated into similar substances by physical or mechanical methods such as filtering, boiling, or sifting. (I have to again write the answer)
Tuesday, February 24, 2015 by Aaliyah

Science~Ms. Sue
What is formed when particles of two or more substances are distributed evenly amongst each other? (I have to write in the answer)
Tuesday, February 24, 2015 by Aaliyah

Science~Ms. Sue
If you are describing methane as a gas that easily catches fire, you are describing a ____. A. state of matter*** B. physical property C. chemical property D. chemical formula I think it's A
Tuesday, February 24, 2015 by Aaliyah

Earth Science to Ms.Sue
9.   Another name for unicellular organisms that dominated Earth up to the Precambrian time is  A. eukaryotes. B. cyanobacteria. C. stromatolites. D. prokaryotes. D?
Tuesday, February 24, 2015 by Sarah

Science
If you are describing methane as a gas that easily catches fire, you are describing a ____. A. state of matter*** B. physical property C. chemical property D. chemical formula I think it's A
Tuesday, February 24, 2015 by Aaliyah

Science
An object weighing 90 N has a volume of 45 mL and a mass of 9.0 g. What is its density? a. 0.10 g/mL b. 0.20 g/mL c. 5.0 g/mL d. 10 g/mL
Tuesday, February 24, 2015 by Katie

Science
Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia?
Tuesday, February 24, 2015 by Kayla

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