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April 18, 2014

Homework Help: Science

Branches of Science

Recent Science Questions

Post a New Question | Current Questions

Science
Will you check my answers please Mrs.Sue?
Tuesday, March 4, 2014 at 12:47pm

Science
1. The greenhouse effect is caused by the burning of fossil fuels and deforestation. (Points : 1) Answer False . 2. Which statement best summarizes the world’s reaction to stratospheric ozone depletion discussed in Chapter 7.4 of your text? (Points : 1) International ...
Tuesday, March 4, 2014 at 12:15pm

science - incomplete
None
Tuesday, March 4, 2014 at 12:08pm

Science
Which statement best summarizes the world’s reaction to stratospheric ozone depletion discussed in Chapter 7.4 of your text?
Tuesday, March 4, 2014 at 12:05pm

Maths Literacy,Life Sciences,History,Geography
m in grd 10 n m doing history life science geography n maths lit but i dnt know what 2 be
Tuesday, March 4, 2014 at 11:55am

Science
Correct!
Tuesday, March 4, 2014 at 11:54am

Science
1.   What would happen to an object if the force of gravity on Earth was decreased by half?  (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2.   Which of the following ...
Tuesday, March 4, 2014 at 11:53am

science
which detail helps to predict stormy weather? a). Dewpoint: 57F./ 14c. b). Barometer:29.99 rising. c). Hi:65F, d).Heat index: NA. My answer is ( b )
Tuesday, March 4, 2014 at 6:55am

Science
A tug is capable of pulling a ship with a force of 100 KN. If two such tugs are pulling on one ship, they can produce any force ranging from a minimum of 0 KN to maximum of 200 KN. Give a detailed explanation of how this is possible. Use diagrams to support your result.
Tuesday, March 4, 2014 at 1:48am

Science- Brady , Ms. Sue , Damon
thanks so much guys ! :)
Monday, March 3, 2014 at 9:33pm

Computer science
hey
Monday, March 3, 2014 at 8:59pm

science
a = F / m
Monday, March 3, 2014 at 8:56pm

Science- Brady , Ms. Sue , Damon
a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force. Would any of those balls go anywhere on any predictable path? Would their motion be random? Could you guess where a...
Monday, March 3, 2014 at 8:54pm

Science- Brady , Ms. Sue , Damon
Also, try looking the question up on Google. I found Open Study on the first page as the first site. Hope this again, helps! :)
Monday, March 3, 2014 at 8:49pm

Science- Brady , Ms. Sue , Damon
Mindy,I have never had this question before. A good site that would help you would be Open Study. There you can search this question, and see past answers for it. I hope this helps! :)
Monday, March 3, 2014 at 8:47pm

Science- Brady

Monday, March 3, 2014 at 8:35pm

Science- Brady , Ms. Sue , Damon
I did not answer before because those games would be meaningless without inertia.
Monday, March 3, 2014 at 8:33pm

Science- Brady , Ms. Sue , Damon
How would playing a game of soccer, baseball, or basketball be different if inertia didn't exist?
Monday, March 3, 2014 at 8:32pm

science
Fill in the blank? The acceleration of an object is equal to the net _____ acting on the object divided by the objects____?
Monday, March 3, 2014 at 8:10pm

Inertia Science
How would playing a game of soccer, baseball, or basketball be different if inertia didn't exist?
Monday, March 3, 2014 at 8:04pm

science
F = G M m / r^2 = m a = m v^2/r in other words gravitational force equals mass times centripetal acceleration.
Monday, March 3, 2014 at 8:01pm

Science- Brady, 2 more!
You're welcome, Mindy. Glad that I could help. :)
Monday, March 3, 2014 at 7:59pm

Science- Brady, 2 more!
Thanks!
Monday, March 3, 2014 at 7:56pm

Science
What types of experiments may be helpful to determine how to keep E. Coli from spreading quickly?
Monday, March 3, 2014 at 7:55pm

Science- Brady, 2 more!
Both of your answers are correct.
Monday, March 3, 2014 at 7:53pm

Science
Both of your answers are correct.
Monday, March 3, 2014 at 7:52pm

Science- Brady, 2 more!
#1. Which statement is true about the image below? 7 N -> |rectangle| <- 7 N •The forces acting on the rectangle are balanced. (?CORRECT?, MY ANSWER) •The forces acting on the rectangle are unbalanced. •The forces acting on the rectangle are unequal. •...
Monday, March 3, 2014 at 7:51pm

science
What universal force is primarily responsible for keeping satellite in orbit around earth? Answers are electromagnetic force, strong nuclear force, gravitational force, weak nuclear force. Thank you
Monday, March 3, 2014 at 7:50pm

Science- Brady, 2 more!
#1. Which statement is true about the image below? 7 N -> |rectangle| <- 7 N •The forces acting on the rectangle are balanced. (?CORRECT?, MY ANSWER) •The forces acting on the rectangle are unbalanced. •The forces acting on the rectangle are unequal. •...
Monday, March 3, 2014 at 7:47pm

Science
You're welcome, Mindy. :) P.S. I had a lesson on this type of stuff not to long ago, so I decided to answer with things that I remembered. What I said above were things that I had remembered.
Monday, March 3, 2014 at 7:43pm

Science -Check Answers-
You are welcome :)
Monday, March 3, 2014 at 7:38pm

Science
Yes, you are correct thanks so much!
Monday, March 3, 2014 at 7:37pm

Science
Yes, the correct answer is Right. When there is two forces on two sides, the one with the greater force pushes the object into the direction of the smaller force. That is when the forces are unequal. When they are equal forces, the object doesn't go anywhere. Force one is...
Monday, March 3, 2014 at 7:32pm

Science- ASAP, Please, :(

Monday, March 3, 2014 at 7:30pm

Science
I can’t put the diagram (picture) here so... I type down: Hope it help! left side there is an arrow pointing to the square, it measures 5 N (big) In the middle (between the arrows) there is a square Right side there is an arrow pointing to the square, it measures 3 N (...
Monday, March 3, 2014 at 7:16pm

Science
B
Monday, March 3, 2014 at 7:05pm

Science
grass for the horse that turns the treadmill. corn to make ethanol .... I will be at this all night, have to stop.
Monday, March 3, 2014 at 6:43pm

Science
windmill in the back yard for electricity and water well pump solar panels for hot water and electricity and heat stationary bikes hooked up to alternators to run battery chargers for your computers and some lights and maybe TV stream in back yard diverted to run over water ...
Monday, March 3, 2014 at 6:41pm

Science
wood stoves for heating, cooking. Solar energy for heat, hot water, electricity.
Monday, March 3, 2014 at 6:39pm

Science
How would renewable energy sources be used in a home?
Monday, March 3, 2014 at 6:36pm

Science
What types of experiments may be helpful to determine how to keep E. Coli from spreading quickly?
Monday, March 3, 2014 at 6:15pm

Science -Check Answers-
first is ok second no by conservation of momentum the velocity will remain the same until an outside force ACCELERATES it F = m A
Monday, March 3, 2014 at 6:05pm

Science -Check Answers-
# 2. When __________ forces act on an object, they cause the object to move. •Balanced •Unbalanced (?CORRECT?, MY ANSWER) •Friction •Net # 4. Which of the following terms BEST describes the scenario below? A meteor moving through outer space continues to ...
Monday, March 3, 2014 at 5:57pm

Science
What types of experiment may be helpful to determine how to keep E. Coli from spreading quickly?
Monday, March 3, 2014 at 5:49pm

Science
You need a course in hydrodynamics to explain how erosion and deposition cause meander and eventually cut off forming a horse shoe shaped lake.
Monday, March 3, 2014 at 3:12pm

Science
Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication process? A. denitrification B. nitrogen fixation C. producer uptake of nitrogen D. consumer decomposition
Monday, March 3, 2014 at 3:12pm

Science
1. How does groundwater cause erosion and deposition? a. When acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves. *** ____________________ I agree if the question is about formation of caves. That is not what the question says ...
Monday, March 3, 2014 at 3:11pm

Science
So all of them were right except the last one?
Monday, March 3, 2014 at 3:07pm

Science
1. How does groundwater cause erosion and deposition? a. When acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves. *** b. When a river overflows, it moves downhill, resulting in the formation of caves. c. When it rains, water ...
Monday, March 3, 2014 at 3:06pm

Science
Thanks! :)
Monday, March 3, 2014 at 2:59pm

Science
F = m a F up from scale - m g = m a but a = -g (free fall) so F up from scale - m g = - mg so F up from scale = 0
Monday, March 3, 2014 at 2:52pm

Science
Well, I agree because it says changes and the cat changed direction twice, once to turn around and once to go from horizontal speed to vertical speed, thereby changing velocity without much change in speed.
Monday, March 3, 2014 at 2:49pm

Science
1. How does groundwater cause erosion and deposition? a. When acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves. *** b. When a river overflows, it moves downhill, resulting in the formation of caves. c. When it rains, water ...
Monday, March 3, 2014 at 2:46pm

Science
She forgot to change to my name! sorry!
Monday, March 3, 2014 at 2:46pm

Science -CHECK MY WORK-
Jessica is my sister. She forgot to change her name!
Monday, March 3, 2014 at 2:45pm

science
To continue moving in a circle requires an inward directed force from tension in a string or banking of a curve because the object is continually accelerating toward the center. If you let it go, it would go in a straight line. The constant acceleration toward the center is ...
Monday, March 3, 2014 at 2:44pm

Science -CHECK MY WORK-

Monday, March 3, 2014 at 2:43pm

Science
A man with a mass of 80KG stands on a bathroom scale on the floor of a lift. Determine the reading of the scale if the lift is at freefall.
Monday, March 3, 2014 at 2:38pm

Science
A cat is walking down a sidewalk and spots a dog in a nearby yard. The cat strats to run in the opposite direction and then quickly climbs a tree. Which of the the following changes most accurately describes the movement of the cat? speed distance velocity****** motion
Monday, March 3, 2014 at 2:27pm

science
Inertia is the word you are looking for I think.
Monday, March 3, 2014 at 2:24pm

science
A force that keeps an object moving in a circle is called?thank you
Monday, March 3, 2014 at 2:23pm

science
Fill in the blanks? The tendency of an object to resist any change in its motion is called what?
Monday, March 3, 2014 at 2:13pm

science HELP ASAP!!!!!!!
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
Monday, March 3, 2014 at 12:46pm

science
A new moon is discovered orbiting Neptune with an orbital speed of 9.3 ´ 10 m/s. Neptune’s mass is 1.0 ´ 10 kg. What is the radius of the new moon’s orbit? What is the orbital period? Assume that the orbit is circular. (G = 6.673 ´ 10 N·m/kg)
Monday, March 3, 2014 at 11:19am

science HELP ASAP!!!!!!!
12. How do the cherries on a cherry tree help the plant reproduce? (1 point) Cherries develop into seeds, which are young, undeveloped plants. Animals eat the cherries, which helps disperse the plant’s seeds. Pollen inside the cherries fertilizes ovules, which produce ...
Monday, March 3, 2014 at 11:07am

Math? Science?
.
Monday, March 3, 2014 at 10:36am

onors Physical Science
T
Monday, March 3, 2014 at 10:13am

Science
a
Monday, March 3, 2014 at 9:14am

science
A shallow pan and a deep bowl hold equal amounts of salt water. If you left both containers in the sun for a day and then measured the salinity of the water in each, which would be saltier? Why?
Monday, March 3, 2014 at 9:03am

Science
In the beginning, Earth was molten, then the crust cooled and contracted, and is still contracting, and the molten core is still under great pressure.
Monday, March 3, 2014 at 6:25am

Science
What is the origin of volcanism?
Monday, March 3, 2014 at 4:05am

Science please help
Never mind I figured out the answer so please delete this question of mine thanks:)
Monday, March 3, 2014 at 12:59am

Science please help
Draw Bohr diagrams of a magnesium atom bonding with fluorine atoms. Draw atoms then electron transfer and finally the ions that form. What type of bonding occurs? Draw Bohr diagrams of 2 hyrdogen atoms bonding with an oxygen atom by sharing electrons to form a water molecule. ...
Monday, March 3, 2014 at 12:36am

Science to: DrBob222
You are a lifesaver thank u soooooo much:)!!!!
Sunday, March 2, 2014 at 11:30pm

Science to: DrBob222
1. Most ionic compounds have a crystal structure. You must break the chemical bond and tear away the crystal structure. Basically it takes less energy to break the covalent bonds than an ionic bond. 2. Dissolve the compound in water and test the conductivity. Strong ...
Sunday, March 2, 2014 at 10:43pm

Science to: DrBob222
1. Explain why the melting points of ionic compounds and molecular compounds differ? 2. A.) What laboratory procedure allows you to test a compound is ionic or molecular? b.) what results would you expect? 3. A.) What do we call the smallest particle of an element? b.) what ...
Sunday, March 2, 2014 at 10:09pm

College Chemistry - Science
I really don't understand the problem. What are you to judge by? Of course you can deprotonate half of it if you add enough NaOH. If you add enough NaOH I should think you could deprotonate all of the HPO4^2-. But I don't know how you would tell when you were there ...
Sunday, March 2, 2014 at 10:02pm

College Chemistry - Science
In an acid-base experiment at 25.0°C, a sodium hydroxide solution was standardized against KHP. The average value for the concentration of the sodium hydroxide solution was calculated to be 0.0125 M. This solution was used to titrate the phosphoric acid present in coke. ...
Sunday, March 2, 2014 at 9:25pm

Science help
For each of the following what type of smallest particle would exist? explain your reasoning? a.) strontium B.) CaCl2 C.) CCl4 D.) SO2 E.) helium F.) bromine G.) MgO Thanks :):):):)
Sunday, March 2, 2014 at 8:49pm

Science urgent
1. Explain why the melting points of ionic compounds and molecular compounds differ? 2. A.) What laboratory procedure allows you to test a compound is ionic or molecular? b.) what results would you expect? 3. A.) What do we call the smallest particle of an element? b.) what do...
Sunday, March 2, 2014 at 8:47pm

College Chemistry - Science
Thank you so much! Not it makes sense!
Sunday, March 2, 2014 at 8:27pm

College Chemistry - Science
pH 11.95 means pOH = 2.05 pOH = -log(OH^-) (OH^-) = 0.00891 0.00891 x 30 mL = about 0.27 (Note: Calculations give this as 0.267 but I've rounded to 0.27 because you're allowed only two significant figures.) mmols acid = 45 x 0.002 = 0.09 CH3COOH + NaOH ==> CH3COONa...
Sunday, March 2, 2014 at 8:25pm

College Chemistry - Science
At room temperature (25°C), 45 mL of a 0.002 M acid solution reacts with 30 mL of a NaOH (aq) solution (pH = 11.95), determine (through calculations) whether the acid is phosphoric acid (H3PO4), acetic acid (CH3COOH), or carbonic acid (H2CO3).
Sunday, March 2, 2014 at 7:54pm

Chemistry - Science
In an acid-base experiment at 25.0°C, a sodium hydroxide solution was standardized against KHP. The average value for the concentration of the sodium hydroxide solution was calculated to be 0.0125 M. This solution was used to titrate the phosphoric acid present in coke. ...
Sunday, March 2, 2014 at 7:49pm

Science
P V = n R T constant here so 550 mL/ 22 = 25 mL
Sunday, March 2, 2014 at 6:58pm

Science
A gas has a volume of V1 = 550 mL. If the temperature is held constant, what volume would the gas occupy if P2 = 22 P1? Answer in units of mL
Sunday, March 2, 2014 at 6:00pm

Physical Science
c = (5/9)(F-32) c = (5/9)(86-32) = 30 deg C I do not know what you are using, perhaps: V = 331.4 + .6 C V = 331.4 + .6(30) = 349.4 m/s d = 349.4 * 2.3 = 804 meters period = 1/653 lambda = 349.4 * 1/653 = .535 meter
Sunday, March 2, 2014 at 4:23pm

Physical Science
2 d = 1400 * .16 d = 112 meters deep 2 d = v t 2 * 1000 * 3.5 = 1400 t t = 5 seconds
Sunday, March 2, 2014 at 3:50pm

Science
(1/2) * (6/4) = 6/8 = 3/4
Sunday, March 2, 2014 at 3:45pm

Science
never mind i figured it out it is carbon offset but thank you any way Ms. Sue
Sunday, March 2, 2014 at 3:44pm

Science
Do you have other choices?
Sunday, March 2, 2014 at 3:41pm

Science
1 cup has 6/4 of water in it cup 2 has half of cup 1. What is cup 2?
Sunday, March 2, 2014 at 3:36pm

Science
yes, you are welcome.
Sunday, March 2, 2014 at 3:20pm

Science
In an effort to reduce global warming, individuals and companies have been buying __________________ to fund restorative projects Can someone please help me I am thinking Carbon Filters but i think that might be wrong
Sunday, March 2, 2014 at 3:17pm

Science
so it is d right? thank you
Sunday, March 2, 2014 at 3:11pm

Science
mass is matter
Sunday, March 2, 2014 at 3:10pm

Science
which property of nutrients shows that they are a type of matter? A. Nutrients are colorful B.Nutrients can do work C. Nutrients contain energy D. Nutrients have mass
Sunday, March 2, 2014 at 2:58pm

Physical Science
The air temperature on a certain day is 86 degrees F A)Convert to Celsius? B) Calculate the sound of speed in air? C)When a 653Hz tornado siren is turned on, the sound takes 2.3s to reach an observer. How far is the observer from the main siren, and what is the wavelength of ...
Sunday, March 2, 2014 at 2:34pm

Physical Science
An ultrasonic wave in water is a compression wave that travels at 1,400 m/s A) An ultrasonic wave from a ship travels to the bottom of a lake and back in 0.16s. How deep is it at this point? B) If an ultrasonic wave is emitted in the ocean where the ocean's depth is 3.5km...
Sunday, March 2, 2014 at 2:31pm

science
A copper calorimeter of mass 150g, was half filled with water of mass 300g and temperature 0 degrees celcius. 5g of ice at 0 degrees celcius was added to the content, later some quanity of steam was passed into the mixture and the temperature rose by 20 degrees celcius. ...
Sunday, March 2, 2014 at 12:44pm

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