Friday
May 22, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

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 at 5:12pm

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 at 5:11pm

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 at 4:50pm

Physical science
What is apparent weightlessness?
Monday, March 2, 2015 at 4:22pm

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 at 4:19pm

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 at 3:18pm

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 at 2:50pm

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 at 1:43pm

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 at 1:24pm

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 at 10:21am

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 at 8:59am

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 at 8:43am

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 at 8:29am

Environmental Science
Over the past 20 years in the United States, nuclear power production?
Monday, March 2, 2015 at 2:11am

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 at 11:29pm

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 at 11:28pm

science
Na2 SO4 + Ca Cl----> Ca SO4 +Na Cl
Sunday, March 1, 2015 at 8:53pm

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 at 2:39pm

science
what is the balanced chemical equation for (NH4)2SO4 + CuSO4.5H2O?
Sunday, March 1, 2015 at 1:50pm

maths lit,civil technology,egd,physical science
Can i possibly be accepted for land surveyor if am doing these subject
Sunday, March 1, 2015 at 10:39am

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 at 9:29pm

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 at 6:31pm

Science
Describe the total momentum of billiard balls before and after the cue ball collides with another ball
Saturday, February 28, 2015 at 5:29pm

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 at 3:46pm

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 at 1:40pm

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 at 6:41am

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 at 12:11am

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 at 7:34pm

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 at 7:32pm

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 at 7:24pm

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 at 6:27pm

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 at 6:13pm

science
please Ineed Atomic mass for the element in periodic table.
Friday, February 27, 2015 at 6:05pm

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 at 4:53pm

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 at 4:08pm

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 at 3:27pm

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 at 1:16pm

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 at 12:54pm

Maths literacy,life science,physical science,consu
careers for this subjects
Friday, February 27, 2015 at 12:25pm

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 at 11:57pm

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 at 11:19pm

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 at 9:25pm

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 at 8:20pm

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 at 7:02pm

Science
What is a conducter
Thursday, February 26, 2015 at 3:47pm

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 at 2:37pm

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 at 1:49pm

Life science
Mortality
Thursday, February 26, 2015 at 12:54pm

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 at 11:34am

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 at 11:32am

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 at 11:06am

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 at 7:56am

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 at 5:55am

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 at 9:45pm

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 at 9:30pm

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 at 9:29pm

Science
Why does atmospheric pressure usually decrease when humidity increases?
Wednesday, February 25, 2015 at 9:12pm

science
What will happen when I put in minty mentos into all different kinds of soda?
Wednesday, February 25, 2015 at 8:33pm

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 at 7:51pm

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 at 7:31pm

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 at 6:57pm

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 at 5:12pm

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 at 4:23pm

science
Climate change studies suggest the worst impacts will be felt by the wealthiest people
Wednesday, February 25, 2015 at 3:43pm

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 at 3:39pm

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 at 2:48pm

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 at 2:47pm

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 at 2:07pm

Science
After returning from her morning walk, Laura states, "It is cold outside." What kind of statement is this?
Wednesday, February 25, 2015 at 11:53am

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 at 11:52am

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 at 11:46am

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 at 2:34am

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 at 11:54pm

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 at 8:11pm

Science
Describe the pattern of regional surface winds around the center of a low pressure system in the northern hemisphere?
Tuesday, February 24, 2015 at 6:21pm

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 at 5:58pm

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 at 5:23pm

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 at 5:17pm

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 at 4:51pm

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 at 4:46pm

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 at 4:45pm

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 at 4:33pm

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 at 3:17pm

Physical science
A force t=312n up and incline is reward to keep a body at rest on a fritionless inclined plane which make an angle of 35degress with horizontal. Draw a force diagram and label all the force acting on a body. Calculate the magnitude of the force due to gravity and the normal force
Tuesday, February 24, 2015 at 2:09pm

Earth Science
Why does the Earth have a magnetic field?
Tuesday, February 24, 2015 at 1:10pm

science
Why do Ontario and Quebec generate the most electric energy?
Tuesday, February 24, 2015 at 9:43am

science
CAN ONE IN THEORY OR ACTUAL DEPRIVE A PARTICULAR AREA OF SPACE; 1sq mile of space of oxygen while the surrounding area of space has normal levels of oxygen?.... This question is not limited by the use of other chemicals or machinations to achieve GOAL....
Tuesday, February 24, 2015 at 8:51am

engineering science n3...please help and explain
Heat A.5kg of steel is cooled down in oil and the temperature drops from 900 degrees celsius to 27degrees celsius. The specific heat capacity of steel is 460J/kg degrees Celsius and that of oil 1.5kJ/kg degrees Celsius Calculate the following: 1.quantity of heat lost by steel ...
Tuesday, February 24, 2015 at 8:24am

Science
Which of the following types of pathogens can only reproduce itself if it takes over host cells? A fungi B bacteria C virus *** D protozoa am i right?
Monday, February 23, 2015 at 9:33pm

Science
What is DNA and RNA? How do it work? How does it reproduce? How does it mutate? How do things evolve?
Monday, February 23, 2015 at 9:21pm

Science please help
Which of the following types of pathogens can only reproduce itself if it takes over host cells? A fungi B bacteria C virus *** D protozoa am i right?
Monday, February 23, 2015 at 9:09pm

Science
What is Genetics?
Monday, February 23, 2015 at 8:04pm

Science
What type of element is fluorine?
Monday, February 23, 2015 at 6:08pm

Science
You have a block of ice with a mass of 6.12 . The volume of the water is 100L and the volume of water when the ice is in the water is 106.66L. I subtracted 100.00 and 106.66 to get 6.66L as the volume of the ice What I'm confused about is how to divide 6.12 by 6.66 in long...
Monday, February 23, 2015 at 5:18pm

Science
A boy and girl sit on a seesaw of length 4m, balanced at its center. The girl sits at the far end and has a mass of 50kg. The boy is twice as heavy as the girl, and therefore sits midway between his end and the center. Then the girl is given a bag of oranges weighing 5kg, and ...
Monday, February 23, 2015 at 5:12pm

science
How are weathering and soil formation related?
Monday, February 23, 2015 at 3:51pm

science
How do water and air cause rocks to crumble?
Monday, February 23, 2015 at 3:51pm

science
A ball sitting on the top of a table has potential energy but no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor? A. Both its potential energy and its kinetic energy decrease. B. Both its potential energy and its kinetic...
Monday, February 23, 2015 at 3:31pm

Science
Which of the following is an indication that a planet may exist near a distant star A. the star varies in temperature B. The star has a very slight back and forth motion C. the star has very strong gravity D. Radio wave activity increases near the star I think the answer is A
Monday, February 23, 2015 at 3:10pm

science
What is the density value of octane at the pressure of 101.325kpa and temperature of 298K?
Monday, February 23, 2015 at 4:20am

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