# physics( i have no idea how to go about gettign th

163,123 results, page 49

### Physics Help Please!!!!

1) A high-speed maglev train is traveling with a changing velocity. what can be said about the forces acting on the train? 2) An automated vehicle in a warehouse is traveling at a constant velocity. what can be said about the forces acting on the vehicle?

### chem

im studying for a test and i have no idea where to even start for this practice problem..?? a 0.15M(molarity im assuming)solution of BrCl2 contains.. a).15MBr2+ ions and .30M Cl- ions b).30MBr2+ ions and .15M Cl- ions c).15MBr2+ ions and .15M Cl- ions d).30MBr2+ ions and .30M ...

### physics, I'm stuck

In an aortic aneurysm, a bulge forms where the walls of the aorta are weakened. If blood flowing through the aorta (radius 1.0 cm) enters an aneurysm with a radius of 2.5 cm, how much on average is the blood pressure higher inside the aneurysm than the pressure in the ...

### math

how to use hundreds chart to answer this;(1)what % of the numbers are multiples of 3 (2)what % of the numbers are multiples of both 2 and 3 (3) what% of the numbers are factors of 100 (4)what % of the numbers are prime numbers? i really have no idea how to use hundreds chart ...

### Physics

12th grade physics ap question. A baseball with a mass of 120 g is hit 21.8 m into the air. The ball is caught by the third baseman 2.5 m above the ground. What potential energy did the ball develop at its highest point? How much potential energy did it still have when it was ...

### English

1. It's no use worrying about it. 2. It's no use to worry about it. 3. It's of no use worrying about it. 4. It's of no use to worry about it. --------------------- Which ones are grammatical? What does 'it' in the front refer to in each sentence?

### english- main idea full

A hurricane is a very powerful storm. It is a cyclonic storm, which means that it has a circular pattern within the hurricane within the hurricane. The name hurricane refers to storms that startover the Atlantic Ocean or eastern Pacific Ocean. For example, they are called ...

### english/photography

i have three photographs, one of a soccer ball, one of cd's, one of books, and one of boxes and chaos. i have to write one sentence that connects them all and tells about my life but it cant be really cliche and concrete.. i cant think of anything that isn't concrete. any ...

### writing

What can be done about performance-enhancing drugs in sports? If you do a search on performance enhancing drugs, you will find good web sites, the best probably is "How stuff works..." good luck... Once you have something written up in which you state YOUR opinion about all ...

### Science

I need to have an essay written about a book and the scientific relation behind it. I would do it myself but I'm not sure I know what to do and it's a large portion of my grade and it's not due until June but I need it soon as possible so I can get the worry off of my chest. ...

### Math- Multi-step word problems

A canoe in still water travels at a rate of 10 miles per hour. The current today is traveling at a rate of 3 miles per hour. If it took an extra hour to travel upstream, how far was the trip one way? about 14 miles about 15 miles about 16 miles about 17 miles

### PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #8: A 20 kg block of ice slides without friction down a long hill. The start ...

### Business

1. One of the main disadvantages of buying a franchise is that you may end up A. choosing a poor location. B. hiring a large staff. C. paying too much for operating costs. D. feeling like an employee. D? 2. After you open your new business is not the best time to A. use your ...

### BUSINESS

1. One of the main disadvantages of buying a franchise is that you may end up A. choosing a poor location. B. hiring a large staff. C. paying too much for operating costs. D. feeling like an employee. D? 2. After you open your new business is not the best time to A. use your ...

### Grammar

Can someone please check if my answers are correct? Identify the verb form that correctly completes each sentence: 1.At the stroke of midnight, the fireworks ________ into the night sky. A.burst B.bursts C.bursted D.bursting A 2.Jermaine, seeing the shower of lights, _________...

### English

Love-Charm Song (Ojibway) I can make That man bashful I wonder What can be the matter That he is so bashful. Song of a Maiden Disappointed in Love (Blackfoot) My lover looked like an eagle from a distance, But alas! When he came nearer I saw that he was Nothing but a buzzard ...

### social studies

The homework was that you had to write a word that starts with the letter you get and it has to be about social studies.You have to describe the word and draw a picture about it. X ( a word that starts with x ) (description) (picture) The reason why i am having trouble is I ...

### Water - Math Question

This question is related to water footprint calculation. I have no idea how to go about this, if anyone could point me in the right direction, I'd be forever grateful! Background info: The water footprint of the resident of a Blue Sea riparian country (92 million residents, ...

### English - ms. sue

ms. sue I write a Christmas story, it have to be on topic that differing points of view make christmas exciting/interesting. i write my story on a rich girl who go and celebrate christmas with her penpal that be really poor and she realize that christmas not just be about ...

### Technology

I need help with my entry essay, "The Twentieth Century brought an explosion of discoveries and inventions in math, science, and technology. Choose one such discovery or invention, identify it, and name the people responsible. Then explain how this discovery or invention has ...

### English

Can you please tell me if the following alternatives are all possible? I hope you can have a look at them. 1)The jewish communities were restricted in their (or the) professions they could follow. 2)As Christians were not allowed to lend money at interest, many Jewish people ...

### business writing

-----Identify a problem at work or organization to which you belong. Conduct research that would help your workplace or organization solve this problem, or attend some relevant training or workshop that would provide you with such information. -- I am writing an information ...

### Math Calculus

You have an unknown function that is monotone increasing for 1 < x < 5 and have the following information about the function values. With the clear understanding that there is no way to get an exact integral, how would you try and approximate the area under the curve? 1 ...

### English

[From Cambridge English] Have got and have mean the same. Have got is more informal. I’ve got a terrible pain in my back. I have a terrible pain in my back. (more formal) ------------------------------------ Question: What about in American English? In American English, '...

### health

not really homework but just not getting answers to all my questions so in short.If an individual suffering from Alzheimer's Disease or other related dementia is content within their environment does that individual have "quality of life" or do you think they are just ...

### yShanQHSqoMzjxzgyLW

cECXBe Is anybody strong in radio here? We need a colleague who would tell us briefly about the transistor T2. I hope there are radio amateurs here. If it`s not on the subject at all, then I`m sorry. I have to write because I have no choice. PS: if the spelling is not right ...

### Quizzes biology

Hello, my teacher has once said that she gets all of her quizzes from the internet, but I can't find the site. Does anyone have any idea as to where grade 12, hard, biology quizzes may come from? The quizzes are brutal, and it would so great if I could see them ahead of time...

### english

Please help me with my thesis. i have to write a thesis statement in the topic topic "Poverty in USA". like i had lots but my teacher didn't agree with those. can anyone please give me idea what to write. by starting the sentence with " Poverty in USA ....." please give me ...

### History

Question about Puritans behavior in Massachusetts? I was given a picture that wont let me post on here. The top picture has a cowboy boot and a book, and the second picture has a more feminine boot, with dice, a cup, etc. And have to answer: What does the labeling in the two ...

### English

1. How many sisters and brothers do you have? 2. How many sisters or brothers do you have? Do both questions have the same meaning? What about the answers? Are the answers to the questions the same?

### year 8 maths

Find the amount of the following foreign currencies (to 2 decimal places) that can be bought with 250 Singapore dollars. The sterling pound There is a chart and the pound sells at 2,552,0 for 1 Singapore dollar. The pound is bought at 2,578.0. I did 2,552.0 times 250 and got ...

### Sttistics/Please Help

What is the value of the Y-intercept of the least-squares regression line from this data? Round you answer to at least two decimal places. I add all the y up's and came up with 2714.4. Then is says the least-squares regression line for these data has a slope of approximately 0...

### Math

Sketch the region enclosed by the lines x=0 x=6 y=2 and y=6. Identify the vertices of the region. Revolve the region around the y-axis. Identify the solid formed by the revolution calculate the volume of the solid. Leave the answer in terms of pi. I always struggled with this...

### Physics

A nonuniform 2.0-kg rod is 2.0 m long. The rod is mounted to rotate freely about a horizontal axis perpendicular to the rod that passes through one end of the rod. The moment of inertia of the rod about this axis is 4.0 kg m2. The center of mass of the rod is 1.2 m from the ...

### Human resources

Management literature generally assumes that supervisors should conduct job analyses because they are in the best position to know what their subordinates do. Does your supervisor really know what you do? What is it about his or her management style that helps your supervisor ...

### history

What was the role of civil service examinations in Ming China? does anyone have any idea what the answer could be. I was looking on the internet and found this- --The civil service examination system, a an effective cultural, social, political, and educational construction ...

### Improving your writing

Here is the assignment: Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides ...

### math

really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height is...

### math

really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height is...

### grammar

I have learned the difference between perception and interpretation, communication process is necessary for an effective way of communication. I have learned the most important skills for an effective team member. I know how to active listening techniques in the communication ...

### maths

y=sin x Sketch. Find tangent and normal at: a) x=2pi/3 b) x=pi/2 c) x=pi/6 I'm not sure how to scale the graph. I have put the x values into sin x and have points. Not sure about this tangent and normal. Please help!

### Science-Universe and Stars

It says that I have to develop a concept map about the milky way. What is that? Is it like a web or something? It says that I have to develop it to understand the milky way's structure and composition.

### Calc III

Hello, Can somebody help me with the following two problems? 1. Find a value of a such that the vector <a, 1,1> makes an angle of 45 degrees with the vector <1,2,1> or show that no such a exists. ---I started by using theta = arccos (u*v)/(absu*absv) must equal (...

### Math

1. "A bacteria population doubles in number every 3 hours. If there are 40 individuals now, how many in 24 hours?" SO I used the geometric series sum formula, with n=8(24/3=8), t1=40, and r=2, but I got 10200 as the answer, instead of what the answer key solves as 10240. What ...

### Normality headache

I do not fully grasp the idea of Normality. What are the normality and the molarity of a sulfuric acid solution if 30mL of it are required to completely neutralize 24mL of 0.02N NaOH? (one of them, N or M, is never equation dependent because...??) HCl(aq) + NaOH(aq)--> NaCl...

### Math

Bill has 180 coins. Of these coins, 1/12 are dimes. About how many dimes does he have? I think I have to divide . 180 divided by 1/12 equals 15 dimes that he has. Is this correct?

### Spanish

What is this asking? ¿Cómo eres? choices would be: This question asks about about a person's health about what a person is like how a person is feeling today what a person is wearing I think it is about a person's health or how a person is feeling today? Thank you

### English

1. She explained to me how to draw a dinosaur. 2. She explained how to draw a dinosaur to me. (Are both okay? Which one is better?) 3. Susan suggested to us a very good idea. 4. Susan suggested a very good idea to us. (Are both okay? Which one is better?)

### Economics Help

A neoclassical theorist would use the formula Y = (w r * L s) + (I r * K s) to explain why a given person, John, is poor. a) According to the Neoclassical Theory, how would John decide how many hours of labor to supply? Draw an appropriate diagram to illustrate your answer and...

### chem

One atmospheric pressure is that which will support a column of mercury 760.0 mm high. Show that 1 atm equals 1.013 x 10^5 N/m^2. Take the density of Hg to be 13.60 g/cm^3 and the gravitational constant to be 9.80 m/s^2. (You may find unit analysis helpful!) I have no idea ...

### Another binomial distribution question

hi, i'd also really like some help for another binomial distribution question, i have no idea where to start... the question is: A manufacturer makes 10,000 ball point pens per day and estimates that 400 will be defective. She decides that if a random sample of 10 pens contain...

### English/History

In Maus, what 3 times does Vladek almost die, but is saved? I feel like there are a ton of times he could have dies (being in the concentration camps alone is life-threatening enough), but I'm not sure what specific times Vladek was really close to death, but was saved? If ...

### help

Sara runs several times a week and always keeps track of how much time she runs each time she goes out. One day she forgets to take her stopwatch with her and wonders if she can still have some idea of her running time. As she passes a particular pond, she remembers that it is...

### Role of computers in media

could u please help me out and give me a few tips about the role that computers, specifically I.T. plays in the media?? i have gathered a few ponts but not enough...any suggestions are welcome.. Please list what you have come up with so far. Then teachers won't duplicate ...

### falaq

Muslim experts in falaq have produced salat timetables for the convenience of the ummah. a.Naturally they would have certain error margins.If, say for example the error is about 2 minutes. The time for asr is 430 pm. Is it then possible to regard the prayer time to be anywhere...

### business english

1.which of the following sentences is accurate in terms of the words it uses? a. there is alarge amount of people at the convention. b. we have to decide between the four options available to us. c.fewer people will attend the conference this year because of the higher costs. ...

### Literature/Social Studies (Ms. Sue!)

The New Frontier" by John F. Kennedy. 1. What ideas does Kennedy express by quoting William Brandford? A: By quoting William Bradford, Kennedy expresses the idea that, despite great difficulties, man can overcome anything through their will and determination. 2. What reasons ...

### Calc

A person deposits money into a retirement account, which pays 7% interest compounded continuously, at a rate of $1000 per year for 20 years. Calculate: a. The balance of the account at the end of 20 years b. the amount of money actually deposited into the account c. the ...

### Chemistry

Benzene reacts with hot concentrated nitric acid dissolved in sulfuric acid to give chiefly nitrobenzene, C6H5NO2. A by-product is often obtained, which consists of 42.86% C, 2.40% H, and 16.67% N (by mass). The boiling point of a solution of 5.5 g of the by-product in 45 g of...

### history

what impact did the Iron Age have on history. (there was no information about the iron age in our text book and alot of the websites i have looked at don't give me the information i need...PLEASE HELP!!)

### MATH

I HAVE A GARDEN THE WIDTH OF MY GARDEN IS 8FT LONGER THAN THE LENGHT OF IT ARUOUND THE GARDEN I HAVE A 4 FEET WIDE SIDEWALK. THE AREA OF THE SIDEWALK IS ABOUT 320 FEET SQUARE, WHAT ARE THE DIMENSIONS OF MY GARDEN

### Language

People have been making maps for hundreds of years. Christopher Columbus used maps when he sailed to the "New World." At that time, most people thought Earth was flat, and all of the maps they used were flat, too. Of course, Columbus's maps were not accurate, but would you be ...

### Physics

Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with velocity 6.41 m/s at 44.1° above the horizontal, sails through the ...

### Physics

In Stranger in a Strange Land, Robert Heinlein claims that travelers to Mars spent 258 days on the journey out, the same for return, \plus 455 days waiting at Mars while the planets crawled back into positions for the return orbit." Show that travelers would have to wait about...

### English

I am doing a reading comprehension project and I need to find a book and a song about "the elderly". Please Help!! do you mean like about old people or a book called The Elderly? about old people. about old people. hang on I'll look google Books About the Elderly here is a ...

### physics

PLEASE HELP!! I HAVE A TEST TOMORROW!! if Q=30 uC, q=5.0 uC, and d=30cm, what is the magnitude of the electrostatic force on q in N? (Ke= 8.99 x 10^9 Nm^2/C^2) (uC= micro coulombs) (u= 10^-6) a. 15 b. 23 c. zero d. 7.5 e 38 i don't know where to start with this problem. i don'...

### physics

You remove two socks from a hot dryer and find that they repel with forces of 0.003 N when they’re 4 cm apart. If they have equal charges, how much charge does each sock have?

### Chemistry - Energy Phase Changes

Calculate the quantity of heat gained or lost in the following change: 0.44 mol of water evaporates at 100 degrees Celsius - So what I did was: 1 mol -> 6.01 kJ 0.44 mol -> x x = 2.64 kJ of energy gained But apparently this is incorrect? Could somebody please explain to ...

### World History

Among the factors that brought about European colonialism, which of the following supported concepts of racial superiority? A. The introduction of the steam engine and the telegraph B. Social Darwinism C. Economic and trade opportunities D. the machine gun I have read till I ...

### Physics

Between each pair of vertebrae in the spinal column is a cylindrical disc of cartilage. Typically, this disc has a radius of about 2.6 x 10-2 m and a thickness of about 1.4 x 10-3 m. The shear modulus of cartilage is 1.2 x 107 N/m2. Suppose a shearing force of magnitude 18 N ...

### physics

Between each pair of vertebrae in the spinal column is a cylindrical disc of cartilage. Typically, this disc has a radius of about 2.85 10-2 m and a thickness of about 7.14 10-3 m. The shear modulus of cartilage is 1.16 107 N/m2. Suppose that a shearing force of magnitude 10 N...

### environmental engineering

Coal has about 2% sulfur. How many kilograms of sulfur would be emitted from coalfired power plants in the United States in 1 yr? (U.S. electricity production is about 0.28 × 1012 watts, and coal has an energy content of about 30 × 106 J/kg. Note that 1 J = 1W-sec.)

### Math

I am trying to help my child with this problem and I have no idea what to do to solve this word problem. Paul used 1 1/4 gallons of paint to cover 3/8 of the walls in his living room. How many gallons of paint will Paul need to paint all the walls in his living room?

### American Government

Is the Freedom of the Press still a right worth preserving? What do you think? Personally I think it is although I believe the "press" sometimes abuse the right. I think the press speaks too much. I don't know. I mean all that is on the news is about overseas - Newspapers tell...

### English 2

I had to write a persuasive essay about a debatable issue and I chose to write about the Ground Zero Mosque. This is just my rough draft, so I know it's not near perfect; but can someone please tell me what I need to add/remove, etc. ? Thanks! Is building a mosque on or near ...

### physics

A planet has two satellite moons. Moon X has an orbital period of 2.13 days. Moon Y has an orbital period of about 3.53 days. Both moons have nearly circular orbits. Use Kepler's third law to find the distance of each satellite from the planet's center. The planet's mass is 2....

### Physics

A planet has two satellite moons. Moon X has an orbital period of 2.13 days. Moon Y has an orbital period of about 3.53 days. Both moons have nearly circular orbits. Use Kepler's third law to find the distance of each satellite from the planet's center. The planet's mass is 2....

### Math

Ms. Allison drew a box-and-whisker plot to represent her students scores on a midterm test. These are the numbers on the box-and-whisker plot. Lowest value=44 Lower quartile=47 Median=52 Upper quartile=81 Highest value=96 Jason received 81 on the test. How does Jason's score ...

### maths

Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not change. C. A particle which has zero ...

### English

1. You may have a jellyfish at the right top in the picture. 2. You may have a jellyfish at the top right in the picture. 3. You may have a jellyfish on the right top in the picture. 4. You may have a jellyfish on the top right in the picture. 5. You may have a hawkfish in a ...

### Philosphy

Hill claims that a fruitful way to think about the badness of destroying the environment is: To think about what kind of human would choose to destroy the earth. To appeal to theories about God and care for the earth. To examine people’s intuitions about whether it is right ...

### english

i was wondering if i did this correct Each of the following exercises shows the original source, and then a student’s sentence and/or citation about that source. Each sentence and each citation has at least one thing wrong with it (most have more than one). Each of the ...

### College Physic

The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 9.58 s, at which time it is turning at 3.89 rev/s. At this point, the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub smoothly ...

### science

Issue Sources Health/Environmental Effects Carbon dioxide (CO2) Chlorofluorocarbons (CFCs) Ground-level ozone (O3) Sulfuric acid (H2SO4) I need to complete the table above and have no idea what to do. Choose one of the following atmospheric issues: air pollution, global ...

### Math

Statistics Help Space shuttle astronauts each consume an average of 3000 calories per day. One meal normally consists of a main dish, a vegetable dish, and two different desserts. The astronaus can choose from 10 main dishes, 8 vegetable dishes, and 13 desserts. How many ...

### history

When did people stop using parchment and start using paper? These sites will give you the history of paper: (Broken Link Removed) http://inventors.about.com/library/inventors/blpapermaking.htm I'm not really sure as to the answer. You see, I'm writing a story that takes place ...

### Harmonics Problem--please help!

A violin string has a length of 0.350 m and is tuned to concert G, with f = 392 Hz. Where must the violinist place her finger to play concert A, with f = 430 Hz? If this position is to remain correct to half the width of a finger (that is, to within 0.600 cm), what is the ...

### Harmonics Problem--please help!

A violin string has a length of 0.350 m and is tuned to concert G, with f = 392 Hz. Where must the violinist place her finger to play concert A, with f = 430 Hz? If this position is to remain correct to half the width of a finger (that is, to within 0.600 cm), what is the ...

### Math Please help

I do not have any Idea how to set this up. Please walk me through the steps. A.) If a customer buys x copies then he or she pays $500 sqrt x. it cost the company $10,000 to develop the program and $2 to manufacture each copy. If a single customer were to buy all the copies of ...

### geography

one difference of the Canadian shield and the Western Cordillera My work And now forget about the similarities on to the differences. There are many differences about the Canadian Shield and the Western Cordillera but for today I’ll keep it snappy and only do three. So here ...

### Ethics

What information about race and ethnicity in the United States has helped you better understand or relate to specific minority groups? Have you learned something new about your own cultural history? Trends in immigration will continue to shape the face of the United States. ...

### ethnic

What information about race and ethnicity in the United States has helped you better understand or relate to specific minority groups? Have you learned something new about your own cultural history? Trends in immigration will continue to shape the face of the United States. ...

### managerial economics

I have no idea what e=a+bn E is the total earnings of the motion picture industry measured in dollars per year and N is the number of tickes sold in December. First question: How well do movie ticket sales in December explain the level of earnings for the entire year? Also, ...

### math

your are making apple pie for a school fund raiser you have 4 baskets of apples and each basket contains 11 apples each pie requires 3 1/5 apples 1 apple fills about one cup how many cups of apples do you have and how many pies can you make

### Civics

The fact that the states had to unanimously agree to changing the Articles of Confederation meant that the states would have to begin the process of making changes to the government it didn’t matter how ordinary citizens felt about the Articles of Confederation it would be ...

### Physics

Some stoves use the heat produced by current flowing through a conductor. If the heating element (conductor) has a resistance of 30 ohms, how long will the burner have to work to heat 500 g of 30°C water up to its boiling point? The specific heat of water is 4.19 x 103 J/kg...

### Literature

Hi, I just have a question about a confusing question to me in a poem that I have to answer... The poem is Annabel Lee. Here's the question they are asking: What was the effect of the repeated rhymes? I can't find an answer to the question?

### math - due tonight

a closet in your bedroom is 9 1/4 feet long 3 1/2 feet wide . and 12 feet high how much cubic feet or space does it have? About how many cubic yards of space does it have?

### Physics-Sound Waves

I'm not sure how to go about answering this question... I have all these equations and none seem to apply. The question is: If you have two speakers on opposite sides of a concert stage producing identical sound waves with a wavelength of .8m. If you consider only the direct ...