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November 27, 2014

Homework Help: Science

Branches of Science

Recent Science Questions

Post a New Question | Current Questions

Science- help asap plz
think about the role that trees play in the water cycle. what are two of the ways in which they are part of the cycle?
Friday, March 7, 2014 at 6:05pm

Science- still waiting
Give 2 examples for each state of fresh water: a) solid b)liquid c) vapour?
Friday, March 7, 2014 at 5:36pm

Science- HELP Please!
provide three statements that demonstrate the importance of units when describing motion.
Friday, March 7, 2014 at 5:08pm

Science
provide three statements that demonstrate the importance of units when describing motion.
Friday, March 7, 2014 at 4:46pm

Science
provide three statements that demonstrate the importance of units when describing motion.
Friday, March 7, 2014 at 4:17pm

Science
Give 2 examples for each state of fresh water: a) solid b)liquid c) vapour?
Friday, March 7, 2014 at 3:12pm

Science
A ball of mass 200 g is dropped from a height 3 m above the ground onto a hard floor, and rebounds to a height of 2.2 m. If the ball is in contact with the floor for 0.002 s calculate the average force exerted by the floor on the ball
Friday, March 7, 2014 at 2:29pm

science
why is gravity on earth and not on the moon i need something to help me start it off
Friday, March 7, 2014 at 12:48pm

Language Arts
7) While I was researching skate boards, I found an interesting old newspaper story. 8) In the June 29, 1999 edition of the Mercury, there was an article on skateboarding. 9) Some scientists in San Francisco, California filmed skateboarders in action. 10) As they studied the ...
Friday, March 7, 2014 at 12:46pm

Algebra
You are taking a science course in which there will be four tests, each worth 100 points. You have scores of 94,100, and 92 on the first three tests. You must make a total of 360 in order to get an A. What scores on the last test will give you an A? The solution is {s|s>__...
Friday, March 7, 2014 at 10:36am

science
find the empirical formula for a compound that consists of aluminum and chlorine in which the aluminum is 20.2% by mass
Friday, March 7, 2014 at 2:21am

Science
Where are you likely to observe the tiger quolls in there habitat?
Friday, March 7, 2014 at 1:38am

Science
Felipe made a toy boat out of clay, but it kept sinking in water. He changed the boat's design by making it slightly wider than before. Why did Felipe's newly designed boat float on water? A. He decreased the density by increasing the volume. B. He decreased the ...
Thursday, March 6, 2014 at 11:41pm

Science
Jill is jumping on a trampoline in her backyard. When will she have both potential and kinetic energy? A. Halfway between the highest point and the lowest point of a jump B. At the highest point of a jump C. At the lowest point of the jump D. Just before she begins a jump
Thursday, March 6, 2014 at 9:13pm

Environmental Science
On Earth in the extreme northern and southern latitudes, how does the relationship between GPP and NPP change during an entire year’s time?
Thursday, March 6, 2014 at 7:43pm

science
What would you do if every person were only allowed to use 20 gallons of water per day? How would your life change?
Thursday, March 6, 2014 at 7:42pm

Science
In the following diagram, the greem ball changes direction after colliding with the red ball because the red ball has more momentum. True <---- False 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <---- ...
Thursday, March 6, 2014 at 7:03pm

science... PLEASE HELP!
The problem says "during which stage of the cell cycle does the cell membrane pinch the cell in two?" I said the cytokinesis stage is when the cell membrane pinches the cell in two. Am I correct? If not, please help!
Thursday, March 6, 2014 at 6:24pm

science
explain how chromosome behaviour during sexual reproduction in animals ensures perpetuation of parental traits in offspring and, at the same time, genetic variation among offspring.
Thursday, March 6, 2014 at 6:08pm

science
explain how chromosome behaviour during sexual reproduction in animals ensures perpetuation of parental traits in offspring and, at the same time, genetic variation among offspring.
Thursday, March 6, 2014 at 5:43pm

Science
Does a solar powered calculator work when there is no bright light falling on the solar panel? Explain
Thursday, March 6, 2014 at 5:05pm

SCIENCE
1. If the net force on an object is O N, the forces are considered unbalanced. true false <---- 2. Most people in the United States use feet and miles to measure distance in their everyday lives. Why do scientists in the United States use meters to measure distance? Meters ...
Thursday, March 6, 2014 at 4:55pm

Reading skills
According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about 93,000,000 miles from ...
Thursday, March 6, 2014 at 2:37pm

Science
What is a harmful effect of electrical resistance?
Thursday, March 6, 2014 at 2:20pm

Science
the process in which body cells are duplicated in order to grow and repair body tissues is called
Thursday, March 6, 2014 at 12:53pm

8th Grade Science
There is a connection between photosynthesis and cellular respiration. The products from one provide the raw materials for the other. What products of photosynthesis are starting materials for cellular respiration? A. glucose and oxygen B. heat energy and ATP C. carbon dioxide...
Thursday, March 6, 2014 at 12:25pm

Check my answers?--SCIENCE
1. What is true about X-rays and microwaves? a. X-rays have greater speed than microwaves. b. X-rays have greater amplitude than microwaves. c. X-rays have greater frequency than microwaves. d. X-rays have greater wavelength than microwaves. 2. The wavelength of a longitudinal...
Thursday, March 6, 2014 at 12:20pm

8th-g Science: Need help to check answer!!!
Since I will have a science test next week based on these questions but my teacher won't check all answer with the class. I don't want to make a mistake and study to an incorrect answers. Do you mind to check the answers for me so that I am able to see if I got it ...
Thursday, March 6, 2014 at 9:51am

Science--Check My Answers?
1. What is true about X-rays and microwaves? a. X-rays have greater speed than microwaves. b. X-rays have greater amplitude than microwaves. c. X-rays have greater frequency than microwaves. d. X-rays have greater wavelength than microwaves. 2. The wavelength of a longitudinal...
Thursday, March 6, 2014 at 8:54am

science
3. Which of the following is an example of inbreeding? A farmer chooses the cows in his or her herd that produce the most milk and breeds only those cows. A farmer chooses the cows in his or her herd that produce the most milk and breeds them with cows that get sick less often...
Wednesday, March 5, 2014 at 8:54pm

Science- Check Please :)
I only have a couple questions left but I want to be sure that my answers are correct so can someone please help me by checking my answers and if they are wrong can someone please let me know? Thank you! Question Number 1: A freshwater marsh is a type of ecosystem. Grasses, ...
Wednesday, March 5, 2014 at 8:17pm

science( Please Check My Answer)
Question: One of the largest cypress trees in Florida has a tree trunk diameter of about 3.5 m. What is the source of MOST of the carbon in the cypress tree's trunk? Answer choices: A. The tree created carbon during photosynthesis. B. The tree used carbon that it had ...
Wednesday, March 5, 2014 at 7:46pm

Science
Bacteria are classified according to three basic shapes. Name them and give the scientific. name for the shape. 1. Round pairs - Diplococcus 2. Rod shaped - Bacilli 3. ?? I need another one. Please help me.
Wednesday, March 5, 2014 at 7:09pm

Science
Bacteria are classified into 3 basic shapes, name them and give the scientific name. 1. Round pairs - Diplococcus 2. Rod shaped - Bacilli I got 2 can someone help me with one more?
Wednesday, March 5, 2014 at 4:51pm

SCIENCE
WHAT ORGAN MAKES ACID THAT U VOMIT AND CAN BURN THROUGH AN CARPET
Wednesday, March 5, 2014 at 4:21pm

Science
Bacteria are classified into three basic shapes. Name them and give the scientific name for the shape. 1. Diplococcus - Round and paired. 2. Bacilli - Rod shaped. 3. I don't know which else shape they would be classified into.
Wednesday, March 5, 2014 at 4:19pm

Science
If the melting point of a substance is -39C, has the substance melted at 20C?
Wednesday, March 5, 2014 at 4:12pm

Science
What is true about X-rays and microwaves? (1 point) a. X-rays have greater speed than microwaves. b. X-rays have greater amplitude than microwaves. c. X-rays have greater frequency than microwaves. d. X-rays have greater wavelength than microwaves.
Wednesday, March 5, 2014 at 4:07pm

Science
2. Which waves have the longest wavelength and lowest energy on the electromagnetic spectrum? (1 point) a. X-rays b. infrared c. radio waves d. gamma rays
Wednesday, March 5, 2014 at 2:04pm

Science
1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? (1 point) a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B Is it C?
Wednesday, March 5, 2014 at 1:39pm

science(check answers)
can someone check my answer thanks ! 2.The ability to do work or cause change is called A.velocity. B.energy.(I PICK B.) C.transfer. D.friction. 3.Which type of energy is demonstrated by a person jogging? A.electrical energy B.nuclear energy C.electromagnetic energy D.kinetic ...
Wednesday, March 5, 2014 at 1:13pm

Earth, Space and Science
8. A geologist is studying a section of sedimentary rock layers that have been newly exposed by a landslide. Based on what principle, the geologist would assume that the layers increased in age as they looked at them from top to bottom. A. unitarianism B. Principle of ...
Wednesday, March 5, 2014 at 12:11pm

6th grade 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? I don't know how to do this please help!
Wednesday, March 5, 2014 at 12:09pm

Science HW - - - check my answers?
1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B 2. Which waves have the longest wavelength and lowest energy on the ...
Wednesday, March 5, 2014 at 9:38am

science
What is matter
Wednesday, March 5, 2014 at 9:11am

Science
1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B 2. Which waves have the longest wavelength and lowest energy on the ...
Wednesday, March 5, 2014 at 7:49am

Science
Who stated the three laws of motion?
Wednesday, March 5, 2014 at 6:05am

science
what is mitosis?
Wednesday, March 5, 2014 at 3:37am

science
What type of prac do you think you need to use a filter funnel and filter paper. please help quickly
Wednesday, March 5, 2014 at 1:31am

science
Whta is newtons first law?
Wednesday, March 5, 2014 at 12:04am

Science... plz help~!
A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. (1 point) True*** False A ball slowing down as it rolls across a carpet is an example of (1 point) Balanced force Friction*** Inertia Zero net force If the ...
Tuesday, March 4, 2014 at 10:29pm

Science~!
A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. (1 point) True*** False A ball slowing down as it rolls across a carpet is an example of (1 point) Balanced force Friction*** Inertia Zero net force If the ...
Tuesday, March 4, 2014 at 9:26pm

Science
How was Ama Dablam formed?
Tuesday, March 4, 2014 at 7:44pm

Math
Mr. White notices that of the 30 students in his science class, 18 are using yellow pencils, 6 are using blue pencils, 4 are using erasable ink pens, and 2 are using mechanical pencils. If his class is representative of the student body, and there are 600 students in the ...
Tuesday, March 4, 2014 at 5:03pm

science HELP ASAP!!!!!!!
1. in which biome would you find the main types of plants life to be grasses and nonwoody plants? (1 point) 2. Which of the following determines the type of biome classification that will be made for a particular region? (1 point) 3. which of the following do rainforest and ...
Tuesday, March 4, 2014 at 2:26pm

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 represents a heterogeneous mixture? (1 ...
Tuesday, March 4, 2014 at 12:48pm

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

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
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
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!
#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
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
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-
# 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
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. *** 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
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
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
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

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

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
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
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
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
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

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
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
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

science
An airplane pilot sets a compass course due west and maintains an airspeed of 225km/h . After flying for a time of 0.520h , she finds herself over a town a distance 122km west and a distance 15km south of her starting point. Part A Find the magnitude of the wind velocity. v = ...
Sunday, March 2, 2014 at 6:23am

Science
The slevator starts at 1st floor and accelerated 1m/s^2 for 6 seconds and continues at a constant velocity for 12 seconds more and is then stopped in 4 seconds with constant deceleration. If the floors are 3 meters apart at what floor does the elevator stops?
Sunday, March 2, 2014 at 5:51am

science
A man stands on the roof of a building of height 15.8m and throws a rock with a velocity of magnitude 25.2m/s at an angle of 32.7∘ above the horizontal. You can ignore air resistance. Part A Calculate the maximum height above the roof reached by the rock. y = 9....
Sunday, March 2, 2014 at 5:20am

Science
Why do you think the human brain has more convolutions than a pig brain?
Saturday, March 1, 2014 at 10:36pm

Science
In order to prevent a mass erosion event, like we experienced in 1930's Dust Bowl event, which of the following should farmers do? A.) remove worms, ants, and other organisms that live in the soil B.) Keep the land irrigated C.) remove native grasses D. plant the same crop...
Saturday, March 1, 2014 at 10:33pm

Science
What is a mountain's origin?
Saturday, March 1, 2014 at 7:16pm

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