Branches of Science
Recent Homework Questions About Science
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Science
Why is only one egg produced during oogenesis while four sperm are produced during the parallel process of spermatogenesis?
Wednesday, February 22, 2012 at 7:30pm
Science/geology
Why does the Red River flow north, and the Mississippi River flow south?? I think it has something to do with elevation.. but I'm not sure.
Wednesday, February 22, 2012 at 6:57pm
Science/geology
Why does the Red River flow north, and the Mississippi River flow south??
Wednesday, February 22, 2012 at 6:48pm
science
The somatic cells of a dog contain 78 chromosomes. Which of these is false? a) the diploid number is 78 b)the haploid number is 39 c) sperm produced by a dog contains 39 chromosomes d) a cell in metaphase of mitosis contains 78 chromosomes e) a cell in metaphase II of meiosis ...
Wednesday, February 22, 2012 at 5:32pm
physical science
find the mass of sodium chloride formed when 6.9g of sodium burns in a gas jar filled with chlorine gas.
Wednesday, February 22, 2012 at 3:17pm
science
why is the gibb free energy important in plant biology
Wednesday, February 22, 2012 at 1:41pm
Science
What is the realtionship between the second law of thermodynamics and Gibbs free energy
Wednesday, February 22, 2012 at 1:05pm
science
a =vf-vi/t is the equation for calculating the acceleration of an object. Write out the relationship shown in the equation, using words.
Wednesday, February 22, 2012 at 12:38pm
Science
Oceans receive freshwater from precipitation and rivers. Yet ocean level do not change very much from these actions. Why are ocean level not greatly affected? a) Water is constantly seeping underground in the ocean; B)Water is constantly evaporating over the ocean's ...
Tuesday, February 21, 2012 at 10:46pm
science
light wave can move through what
Tuesday, February 21, 2012 at 8:07pm
Science
Scientist study many factors that allow them to predict weather. Which factor most directly affects the movement of air? a) air pressure; b) precipitation; c) relative humidity; d) temperature
Tuesday, February 21, 2012 at 6:24pm
Science
Ed wants to determine if there is a trend in air temperature changes during April. Which of the following procedures should he follow? a) Measure the temperature every hour for 1 day; b) Measure the temperature at noon every day in April; c) Measure the temperature at the same...
Tuesday, February 21, 2012 at 5:57pm
Science
Are all solutions mixtures? Are all mixtures solutions? Explain with examples. I put all solutions are mixtures but all mixtures aren't solutions. I don't know how to explain it with examples
Tuesday, February 21, 2012 at 5:31pm
Physical Science
A 200-L iron tank has a mass of 36 kg. a) Will it float on seawater if empty? b) What mass of potatoes could be added such that the tank would still float? [Note: 1000 L = 1 m3 ]
Tuesday, February 21, 2012 at 3:56pm
Physical Science
A wooden raft 3 m long x 2 m wide x 20 cm thick floats on a freshwater lake. A) Determine the buoyant force? B) If the raft itself has a mass of 600 kg, how many 65-kg people could it support?
Tuesday, February 21, 2012 at 3:48pm
science
Ball 2 with a mass of 30 kg, is moving left at 10 m/s. At what velocity should ball 1, with a mass of 10 kg, move to the right and collide with 2, so that ball 1 rebounds with a velocity of 10 m/s. assume that the collision is perfectly elastic.
Tuesday, February 21, 2012 at 11:12am
science
A rigid container holds a gas at a pressure of 55kPa and a temp of -100.0 deg C. What will the pressure be when the temp is increased to 200.0 deg C?
Tuesday, February 21, 2012 at 11:05am
Political Science
In the past decade, policies have included not-for-profit organizations for the administering of programs such as welfare or child protection services. What are the strengths and weaknesses of using this forum?
Tuesday, February 21, 2012 at 5:50am
science
Two balls of masses 5 kg and 15kg are separated by a fixed distance of 0.8m. find the position of the centre of mass of system
Tuesday, February 21, 2012 at 12:17am
science
On reducing the volume of gas at constant temperature,the pressure of the gas increases .Explain why?
Tuesday, February 21, 2012 at 12:03am
science
explain the significance of the negative sign in gravitational potential energy?
Monday, February 20, 2012 at 11:40pm
science
Consider the following reaction: CH3X + Y --> CH3Y + X At 25ºC, the following two experiments were run, yielding the following data: Experiment 1: [Y]0 = 3.0 M [CH3X] Time (hr) 7.08 x 10-3 M 1.0 4.52 x 10-3 M 1.5 2.23 x 10-3 M 2.3 4.76 x 10-4 M 4.0 8.44 x 10-5 M 5.7 2....
Monday, February 20, 2012 at 10:19pm
Physical Science
How do you write the chemical equation for neutralization of nitric acid, HNO3, with magnesium hydroxide, Mg (OH)2, first with spectator ions and then without spectator ions?
Monday, February 20, 2012 at 9:38pm
science
i need to find a website that has a picture of hafnium lamp filaments
Monday, February 20, 2012 at 4:04pm
Animal Science
what time of the year do feral cats usually mate?
Monday, February 20, 2012 at 2:40pm
agricultural science
examples of planted in an acidic soil and examples of crops planted in an alkaline soil
Monday, February 20, 2012 at 2:08pm
science
why gas has no effect on wet litmus paper
Monday, February 20, 2012 at 12:57am
science
on what website can i find info on things made of the element hafnium:a picture,how it's made, and why it is made with hafnium.
Sunday, February 19, 2012 at 4:24pm
computer science
Declare a structure whose tag name is Emp and that contains these fields (in the following order): a double field named d, a character pointer named str, and an array of eleven integers named arr. * I'm good till here. In addition, declare a array named emp of 30 of these ...
Sunday, February 19, 2012 at 3:26pm
science
i need this answered for me haha^^ i have no clue.. ''a solute was mixed with a solvent, some of the solute fell to the bottom of the test tube, what happend?'' plzzzz answerrr xD
Sunday, February 19, 2012 at 3:16pm
Statistics Behavior Science
Suppose you were in charge of advertising for an automotive dealership when the gas prices increased to $4 per gallon. Most of your cars are fuel-efficient, but you have two models that have extremely poor fuel economy, that is, a low number of miles per gallon. How would you ...
Sunday, February 19, 2012 at 2:34pm
science(chemistry)
complete the following reaction: 1.CH3-CH-_CH2+H2O 2.CH2-CH2+Br2
Sunday, February 19, 2012 at 12:56pm
science
The "proof" of an alcoholic beverage is twice the volume percent of ethyl alcohol, C2H5OH in water. The density of ethyl alcohol is 0.789g/ml and that of water is 1.00g/ml. A bottle of 100 proof rum is left outside on a cold winter day. a.) Will the rum freeze if the...
Sunday, February 19, 2012 at 10:13am
Science
The cirucumference of a ballon is 75 inches and the diameter is 12 inches what is the volume? Science - Ms. Sue, Saturday, February 18, 2012 at 9:54pm Thank you. volume = 4/3 ð r3 V = (4/3) * 3.14 * 6^3 V = (4/3) * 3.14 * 216 V = (4/3) * 678.24 V = ? I am still confuse how...
Sunday, February 19, 2012 at 1:15am
Science
The cirucumference of a ballon is 75 inches and the diameter is 12 inches what is the volume?
Saturday, February 18, 2012 at 9:41pm
lang
A science that looks at atmosphere and the weather. A. Chemistry B. Meteorology C. Geology D. Astronomy d
Saturday, February 18, 2012 at 9:40pm
science
what is a :sweat shop" and before u type ill tell u that it isnt a shop in which u by sweat frum
Saturday, February 18, 2012 at 9:29pm
Science
In what ways is science self correcting? i was just intrested :)
Saturday, February 18, 2012 at 8:43pm
computer science
9.10: Reverse Array Write a function that accepts an int array and the array’s size as arguments. The function should create a copy of the array, except that the element values should be reversed in the copy. The function should return a pointer to the new array. ...
Saturday, February 18, 2012 at 7:27pm
computer science
The variable cp_arr has been declared as an array of 26 pointers to char. Allocate 26 character values, initialized to the letters 'A' through 'Z' and assign their pointers to the elements of cp_arr (in that order). int *arr1[26]={'A','B','...
Saturday, February 18, 2012 at 7:26pm
science
learning about protists i have a blank to fill in: Producers use _____ as energy , during what process?? i wrote sunlight , photosyntheses process is this right? Quest2 Protists producers are algae that have green pigment, chlorphyll that is used for making: ____- i wrote: ...
Saturday, February 18, 2012 at 6:50pm
science
31kg.swimmer.runs.with.a.horizontal..velocity.of.4,0.m/s.off.a.boat.dock.and.lands.in.a.stationery.rubber.raft.of.mass.og.9kg..what.would.be.the.velocity.of.the.swimmer.and.raft.after.the.impact.assuming.no.water.resistance
Saturday, February 18, 2012 at 11:29am
Political Science
Is the rational-comprehensive model or the incremental model best used to describe policymaking in the United States? Provide examples to support your model choice
Saturday, February 18, 2012 at 6:31am
Science
The rest stops the driver made are included in the calculations because that is hoe the problem is defined. However, suppose the bus driver's manager wants to know the average speed at which the driver was actually driving the bus that day while he was on the road. In this...
Saturday, February 18, 2012 at 12:25am
science
displacement vectors of 5km north, 3km east, 2km south, and 3km west combine to a total displacement of? 3km north 13km west 0km 2km south I think 13km west
Friday, February 17, 2012 at 9:29pm
computer science
The variable cp_arr has been declared as an array of 26 pointers to char. Allocate 26 character values, initialized to the letters 'A' through 'Z' and assign their pointers to the elements of cp_arr (in that order).
Friday, February 17, 2012 at 7:23pm
computer science
int *reverse(const int *, int); int *temp; temp = reverse(arr1,N); int *reverse(const int *arr1, int N) { int *arr2; arr2 = new int[N]; for(int count = 0; count < N; count++) { for(int index = (N-1); index <= 0; index--) arr2[count] = arr2[index]; } return arr2; } I need...
Friday, February 17, 2012 at 6:49pm
Science
A lever has a 9-N load 1.5m from the fulcrum. Where should a 0.5N effort force be applied to balance the load?
Friday, February 17, 2012 at 1:08pm
Science
How much effort force is required to life an 11000-N beam using a pulley system with a mechanical advantage of 20?
Friday, February 17, 2012 at 12:41pm
science
A wheel with a radius of 20 cm is attached to an axle with a radius of 1cm. An effort force of 100 N on the wheel counters a resistance force of what on the axle?
Friday, February 17, 2012 at 12:19pm
Physical Science
A 3-kg stone is dropped from a height of 100 m. Find its kinetic and potential energies when it is 50 m from the ground.
Friday, February 17, 2012 at 11:06am
chemistry - science
calculate molarity of NaOHin the solution prepared by dissolving its 4g in enough water to form 250ml of this solution ?
Friday, February 17, 2012 at 7:31am
Chemistry and Science
carbon dioxide is a "greenhouse" gas in that it absorbs energy from the sun, causing heating of the atmosphere and eventually global warming. carbon dioxide is produced from the combustion of carbon-containing fuels such as coal (mainly carbon), natural gas (mainly ...
Friday, February 17, 2012 at 1:05am
physical Science
When a light bulb is rated at 60 W ft what do this mean?
Thursday, February 16, 2012 at 9:28pm
science
how does running water contribute to weathering, erosion, and deposion?
Thursday, February 16, 2012 at 9:01pm
Science
I am learning how to balance a chemical equation but I don't understand it at all. I read that in order to balance the equation, you need to find the number of atoms. How do I do that? How do you balance a chemical equation?
Thursday, February 16, 2012 at 7:57pm
science
According to Peter Saundry, there is no true universal code of ethics because standards ods conduct vary from place to place and time to time. True or False
Thursday, February 16, 2012 at 7:10pm
SCIENCE
I have a homework pqage for kindergarten that says Petal Patterns. Label each pattern. I'm not sure what the teacher is looking for. Can anyone help me?
Thursday, February 16, 2012 at 6:48pm
science
When girls get pregnant, how do they babies get defected?
Thursday, February 16, 2012 at 6:47pm
6th grade science
what would happen if cytokinesis occurred without mitosis???
Thursday, February 16, 2012 at 5:11pm
science
the climate of arizona is always warm because?
Thursday, February 16, 2012 at 4:36pm
science
during eatrhs past, some landmasses lay nearner to the polesand become glaciated. explain how this event could have caused global warming?
Thursday, February 16, 2012 at 4:35pm
science
changes in the positions of the continents may affect global climates by affecting...? finish the sentence. thx
Thursday, February 16, 2012 at 4:33pm
science
why does arizona have monsoon season?
Thursday, February 16, 2012 at 4:31pm
science
how are the soles of your feet heated if you stand barerfooton a sun-warmed sidewalk?
Thursday, February 16, 2012 at 4:29pm
Science
How many grams of oxygen are collected in a reaction where 230. mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
Thursday, February 16, 2012 at 1:15pm
science
EXPLAIN THE USES OF ELECTROMAGNETS
Thursday, February 16, 2012 at 9:18am
SCIENCE
WHAT IS SOLENOID
Thursday, February 16, 2012 at 8:48am
science
EXPLAIN ELECTROMAGNETISM
Thursday, February 16, 2012 at 8:43am
biology
For this assignment you will be using the course companion Web site, MasteringBiology. View and complete the MP3 tutorial: The Process of Science. and “How Does Acid Precipitation Affect Trees?” After completing the activity, develop two alternative hypotheses and ...
Wednesday, February 15, 2012 at 10:46pm
7th grade science
what is a binominal nomenclature mean? Please explain in a simple manner. Thank you
Wednesday, February 15, 2012 at 10:32pm
physical science
a race car having a mass of 2550 kg is accelerated by a force of 127,500n.what is the accelerration?
Wednesday, February 15, 2012 at 9:13pm
Science n math
What is the molecular geometry n the electron domain for HCN
Wednesday, February 15, 2012 at 8:38pm
science
a 100 mL {100 grams} of water at 4.0 degrees celsius is heated until its tempurture is 37 degrees celcus. if the specific heat of water is 4.18 joules/grams degrees celcus calculate the amount of heat energy needed to cause this rise in tempurture
Wednesday, February 15, 2012 at 8:24pm
science
what is the conclusion for what types of water will make a carrot softer
Wednesday, February 15, 2012 at 8:04pm
science
time travel question in km 0 - 240, a vehicles started at 30km at 2:30, where would the truck be at 3:30?
Wednesday, February 15, 2012 at 7:40pm
Science
Label the following inherited or learned Sea turtle laying eggs on a beach=inherit Seal balancing a ball on its nose=learned Spider weaving a web=inherit Birds flying in a v-shape=learned Dogs rolling over= learned A lion returns to the same place everyday to hunt its food. It...
Wednesday, February 15, 2012 at 7:00pm
physical science
A child pushes a book a distance of 17m. If 5J of work was done, how much force was used?
Wednesday, February 15, 2012 at 6:15pm
Science
What are the animals in the tropical rainforest becoming endangered? Answer:Because the rainforest is only 5% on the Earths surface and people cut it down What adaptation helps a plant survive in a hot and dry climate? Answer:Its roots because it can get water from it
Wednesday, February 15, 2012 at 5:51pm
Science
What adaptations do ALL organisms in a tropical rainforest need for survival?
Wednesday, February 15, 2012 at 5:31pm
science
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
Wednesday, February 15, 2012 at 5:12pm
science
how can you determine whether an object has gravitational potential energy or elastic potential energy?
Wednesday, February 15, 2012 at 1:41pm
Science/English
Writeacher, now that the grammar is OK, I just want to know if everything is correct from a scientific point of view. Could you please ask your science teacher, Bob Pursley? 1) After meeting with the engineer ......... we became interested in exploring the problems of water ...
Wednesday, February 15, 2012 at 12:51pm
computer science C++
The variables arr1 and arr2 have been declared as pointers to integers. An array of 10 elements has been allocated, its pointer assigned to arr1, and the elements initialized to some values. Allocate an array of 20 elements, assign its pointer to arr2, copy the 10 elements ...
Wednesday, February 15, 2012 at 7:38am
Political Science
From the 1970s to the present, a shift in the evolution of public policy moved toward a New Federalism. How did this effect public policy? Was this positive or negative? Why?
Wednesday, February 15, 2012 at 5:47am
Physics i.e science
Explain why sharpening grass knives help to ease the effort in cutting grass.
Wednesday, February 15, 2012 at 4:36am
science
a change in ph can change the shape of a protein. how might a change in ph
Tuesday, February 14, 2012 at 8:06pm
5th grade science
A substance seems to completely fill a container, but more can be forced in. The substance is a
Tuesday, February 14, 2012 at 8:01pm
English
I included a few questions and a short paragraph about a teenager talking about the internet (Do you think I should add other reasons for using the net?) 1) What does the sentence "I'm sick leaving" mean? Does it mean "I'm on scik leave?" 2) My ...
Tuesday, February 14, 2012 at 4:32pm
Science
During beta-particle emission, a neutron splits into _______? a proton and an electron two protons two electrons two neutrons
Tuesday, February 14, 2012 at 3:53pm
Natural Science
Where do the shortest wavelenghts accur ?
Tuesday, February 14, 2012 at 3:48pm
science-physics
a boat travels in still water at 2m/s. It is rowed across a river that flows at 1m/s. Determine the resultant velocity of the boat
Tuesday, February 14, 2012 at 1:49pm
Earth Science
What is the landform of the Grand Teton?
Tuesday, February 14, 2012 at 9:35am
Physics i.e science
A density bottle has a mass of 35g when empty, 85g when filled with water and 75g when filled with kerosene. Calculate the density of kerosene in g/cm3.
Tuesday, February 14, 2012 at 8:48am
computer science
I need to write a program that ask the student to enter an answer to a math problem. The user should enter two values, one at a time, and then ask for an answer. The program should display if the entered answer is correct or not and display the correct answer if the user ...
Tuesday, February 14, 2012 at 6:41am
science
what is the geometry around each carbon in ethanoic acid
Tuesday, February 14, 2012 at 5:37am
Science!
When many gene pairs work together, this is called......? Help!!!!! Please!!!!!
Tuesday, February 14, 2012 at 12:03am
hsitory
Which of the following is the study of governmental institutions and processes? A. geography B. political science C. sociology D. economics
Monday, February 13, 2012 at 10:43pm
science
i have no idea what to do for my manatee onclusion. Any ideas for what to say?
Monday, February 13, 2012 at 10:41pm
science
What does it mean when manatees have natural selection? i have a summary to do about manatees and one of the words i have to use is natural selection. Any help?
Monday, February 13, 2012 at 9:43pm
Science
I know tat this sounds silly but my science techer is giving us expierements to try out and she picked for me to reserch how to get rid of split ends??? Can I get a link please?
Monday, February 13, 2012 at 8:38pm
science
If the manatees were able to make 3 adaptions to their body or way of life for their survival, what would they be? PLEASE no websites :/
Monday, February 13, 2012 at 8:37pm
science
From the 1970s to the present, a shift in the evolution of public policy moved toward a New Federalism. How did this effect public policy? Was this positive or negative? Why?
Monday, February 13, 2012 at 7:41pm
Family and Consumer Science
1. Identify - What are four (4) influences that give you a unique indentity? What does this question means??? I'm going to answer it I just want to know what does this question means so that way I can understand it in order to answer this question.
Monday, February 13, 2012 at 6:46pm
Science
Which adaptation helps some plants that live in the dry deserts? A.tall trunks B.long roots C.thin stems D.floating parts B? An animal that sleeps during the day MOST LIKELY lives in A.a tropical rain forest B.a tundra region C.a tide pool D.a hot desert A? A student gathered ...
Monday, February 13, 2012 at 4:51pm
Science
Plants=storing water Bacteria and fungi=decomposing dead organisma Earthworms=making soil less compact Bees=pollinating flowering plants Nearly all organisms=cycling oxygen and carbon dioxide Accoring to the chart,what would most likely happen in an ecosystem if there were a ...
Monday, February 13, 2012 at 4:40pm
Science
Duckweed is a small plant that grows in water Many waterbirds depend on duckweed for food Duckweed can reproduce rapidly in water that is rich in the nutrients used in agriculture. Which of these human activities would most likely cause an overgrowth of duckweed in a pond ...
Monday, February 13, 2012 at 4:33pm
Science
Which of these traits can a tree NOT pass to its offspring? A.the shape of its leaves B.roots that grow toward water C.a trunk scarred by lightning D.the kind of seeds it forms C?
Monday, February 13, 2012 at 4:29pm
Science
A bullet with a mass of 50kg leaves the barrel of a rifle wiyh a velocity of 400m.-1 ,if the mass of the rifle is 3kg ,what is the recoil velocity of the rifle?
Monday, February 13, 2012 at 3:01pm
Science
An object with a mass of 5kg collides witn an object with a mass of 3kg that is stationary.the two objects stick together and move on with a velocity of 6m.-1 .what was the velocity of the 5kg mass before the collision took place?
Monday, February 13, 2012 at 2:58pm
Physical science
A 9kg mass travelling eastwards at 4m.-1 collides with a 3kg mass westwards at 8m.-1.whatis the total momentum of the masses?
Monday, February 13, 2012 at 2:10pm
science
3) Some ionic compounds contain a mixture of different charged cations. For example, some titanium oxides contain a mixture of and ions. Consider a certain oxide of titanium that is 28.31% oxygen by mass and contains a mixture of and ions. Determine the formula of the compound...
Monday, February 13, 2012 at 10:28am
SCIENCE
Determine the mass of a person on the moon whose mass on Earth is 70 kg Determine the weight of a person on the moon whose weight on Earth is 148 lbs. How is the mutual gravitational force affected by changing the separation distance between two 1.0 kg masses if the distance ...
Sunday, February 12, 2012 at 11:18pm
SCIENCE
Two 2.6 kg physical science textbooks on a bookshelf are spaced 0.22 m apart. What is the magnitude of the gravitational attraction between the books?
Sunday, February 12, 2012 at 11:10pm
science
identify onbe external feature of the manatee that allows it to live in water.
Sunday, February 12, 2012 at 10:57pm
6th grade science
why would a shredded carrot turn the softest when it is sitting on top of a table out in the open air compared to the carrot in water and the carrot in salty water?
Sunday, February 12, 2012 at 9:25pm
science
A force of 2000N is used to push a box up an inclined plane that is 5m long. If the 100 kg box is raised to a height of 8m, how much work is done against friction? Let g equal 10 m/s2; I need to know how to set the problem up
Sunday, February 12, 2012 at 7:27pm
science
Given that Antarctica is roughly semicircular with a radius of 2000 km and has an average ice thickness of 3000 m. a) How many km3 of ice does Antarctica contain? b) Assuming all the ice melts, how much will this raise sea level (ignoring that the Earth has curvature and ...
Sunday, February 12, 2012 at 3:35pm
FACS Project Help!
I have this project for facs (family and comsumer science) and I really need help. UNIT: Personal Development Topic: The One & Only You! Lesson: The UNIQUE you! Review Question Due Date: 2/15/12 1. Identify - What are four (4) influences that give you a unique indentity? 2. ...
Sunday, February 12, 2012 at 3:15pm
science
Compare optical telescopes and radio telescopes. What are the advantages of using a radio telescope over an optical one? All I can think of is, that radio telescopes can be used in any form of weather and optical telescopes can't. I'm not sure if that is enough ...
Sunday, February 12, 2012 at 3:00pm
SCIENCE
LIST TWO ENVIRONMENTAL CONDITIONS THAT MIGHT LEAD TO THE DISAPPEARANCE OF MANATEES FROM FLORIDA'S RIVERS? PLEASE HELP.
Sunday, February 12, 2012 at 1:53pm
science
1. If a baseball is thrown 30 m/s backwards from a truck moving forward 50 m/s, how fast will the ball strike the glove of a ground-based catcher?
Sunday, February 12, 2012 at 12:03pm
Science
what are contrasts between a marine and estuarine environment?
Sunday, February 12, 2012 at 5:40am
Science
Can anyone please suggest a food chain which includes a soldier crab starting from the sun (in a marine environment)?
Sunday, February 12, 2012 at 4:51am
Science
1. These are a few descriptor words that we use to describe some organisms: carnivore herbivore scavenger carrion detrital feeder decomposer filter feeder producer Choose words which can be applied to: a) sandworm (Parchment Worm) b) soldier crab c) semaphore crab
Saturday, February 11, 2012 at 11:36pm
Grade 6 Science
Describe a way you can become a victim of a static electric shock. Explain what caused the static electric shock.
Saturday, February 11, 2012 at 10:29pm
Grade 6 Science
Describe a way you can become a victim of a static electric shock. Explain what caused the static electric shock.
Saturday, February 11, 2012 at 10:28pm
Science
A 70kg person dives horizontally from a 200kg boat with a speed of 2 m/s. What is the recoil speed of the boat?
Saturday, February 11, 2012 at 8:06pm
Physical science
Is it possible for an object to have more kinetic energy but less momentum than the other object? Less kinetic energy but more momentum? *i know the answer to both questions is yes, however, i cannot think of examples ??
Saturday, February 11, 2012 at 7:57pm
physical science
A worker pushes horizontally on a large crate with a force of 312 N, and the crate is moved 6.5 m. How much work was done?
Saturday, February 11, 2012 at 6:38pm
science
Name the type of reaction that the equation represents? 2Cu + O2 -------> 2CuO
Saturday, February 11, 2012 at 3:29pm
Science
How do fossils help to correlate layers of rock?
Saturday, February 11, 2012 at 10:56am
science
in the first second of its flight, a rocket ejects 1/60 of its mass with a velocity of 2400 m/s the acceleration of the rocket is
Saturday, February 11, 2012 at 10:47am
science
what is the nature of solute particles in electrolyte solution?
Saturday, February 11, 2012 at 2:14am
science
If the magnitude of the electric field in air exceeds roughly 3 X10^6 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 52 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks without a spark forming (...
Saturday, February 11, 2012 at 12:39am
Science
A block of metal weighing 2kg is resting on a frictionless plane. It is struck by a jet releasing water at the rate of 1kg/s and at a speed of 5m/s. Find the initial acceleration of the block.
Friday, February 10, 2012 at 1:02pm
Science
During a football match, the ball shot towards the goal struck the defender's foot at the speed of 10m/s and it bounced back at 20m/s. If the time of impact was 0.2 sec, and mass of the ball 0.5 kg,then find the average force exerted by defender on the ball.
Friday, February 10, 2012 at 12:56pm
Science
In a rocket, fuel burns at the rate of 1kg/s. This fuel is Ejected from the rocket with a velocity of 60km/s. What force will be exerted on the rocket?
Friday, February 10, 2012 at 12:49pm
Science
According to Peter Saundry, there is no true universal code of ethics because standards of conduct vary from place-to-place and time-to-time
Friday, February 10, 2012 at 8:23am
English
Writeacher, I wanted to thank you for all what you have done for me and for my professional growth. We have worked really hard on the project over the last few days (though I was in bed with flu!) By the way, I used your suggestion as a title for the whole project. If the ...
Friday, February 10, 2012 at 4:26am
science
A microwave oven has a power requirement of 1264 W. A frozen dinner requires 5.5 min to heat on full power.
Thursday, February 9, 2012 at 10:18pm
6th grade science
which particles cannot pass through the cell membrane?
Thursday, February 9, 2012 at 9:24pm
science
this is a tough question and I don't get it. It says: What factor causes the difference between weight and mass?
Thursday, February 9, 2012 at 7:24pm
English
Wrieacher, after so many efforts my partners decided to change the title of the project (instead of focusing only on biodiversity they used the sentence: Comparative studies on local biodiversity related to water and learning from each other. I think it's too generic. As ...
Thursday, February 9, 2012 at 4:37pm
English
One last thing. I varied this sentence since we are going to involve students from different third classes.I don't know how to express the second part. Pupils taken from different (or various) tenth classes will be involved in the project since the scientific project's...
Thursday, February 9, 2012 at 1:42pm
math
I need help with my science project and I am dealing with the heart
Thursday, February 9, 2012 at 12:52pm
English
I left out a brief description of the two partners. Feel free to make the appropriate changed. We need the project to be approved! 1) Lycée ... is a general sencondary high school with 920 pupils, which is situated in south Vendée, the least economically ...
Thursday, February 9, 2012 at 11:16am
science
How could you use the shadow of a lamp post to track the time of day on a sunny day
Thursday, February 9, 2012 at 10:43am
earth space science
Potassium-40 has a half-life of approximately 1.25 billion years. Approximately how many years will pass before a sample of potassium-40 contains one-sixteenth the original amount of parent isotope?
Thursday, February 9, 2012 at 9:53am
English
Here is the part on evaluation + presentation of the German school. Thank you. 1) Presentation of ….. Gymnasium Limes Gymnasium is for the first time involved in a COMENIUS-Project. This project might open the school and its community to a deeper European engagement. 2) ...
Thursday, February 9, 2012 at 8:43am
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