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

163,123 results, page 42

Physics

The four masses shown in the figure below are connected by massless, rigid rods. moi-cog-problem-fig (a) Find the coordinates of the center of gravity of this object if MA = 120 g and MB = MC = MD = 180 g x = ? m y = ? m (b) Find the moment of inertia about an axis that passes...

Hello Jiskha

I must say, you have been one of the most helpful sites that I have been on. You don't lie to people about the answers. You help the people understand, So I would just like to show my gratitude. Thank you so much for your help, with out you guys, Open Study, wikianswers, and ...

college

A lot of people don't have wills. Everyone needs a will, but not all people have one. Wills are important because they explain who gets your stuff after you. You don't want your things going to someone you don't want them to go to. My Aunt Martha went to a lawyer to get a will...

math

I have no idea how to do this either. plz help. thank you. A couple finances a house valued at $150,000. The monthly principal and interest payment has been determined to be $599.32. Taxes on the property are estimated to be $621 per year. Insurance on the property is ...

math

Let f(t) = Q0at = Q0(1 + r)t. f(7) = 75.94 and f(9) = 91.89 (a) Find the base, a. (Round your answer to two decimal place.) a = I honestly have no idea how to approach these problems. I wrote out the different equations: 75.94 = Q0a^7 and 91.89 = Q0a^9 but I don't know where ...

Calculus

Consider the curve below. x = (cos(t))^2 y = cos(t) 0 ≤ t ≤ 6π (a) Find the distance traveled by a particle with position (x, y) as t varies in the given time interval. (b) What is the length of the curve? I have no idea on how to evaluate this integral. I ...

math

The head of an industrial machine moves in a straight line horizontally backwards and forwards from a central position. The movement can be modelled using the sine wave d = 80 sin ( pie t), where d is the horizontal distance (in cm) from the central starting position, and t is...

English

I posted a question like this earlier but I forgot to add something. If I were to write an essay about the experiences of Jewish individuals or communities living under Nazi occupation during World War II, what could be some things I could add to it? I have to write about ...

conclusions - check answer

Which of the following is a true statement about writing introductions of rough drafts? A. Do not worry about the central point of your essay; it will happen later on as you revise your paper. (MY ANSWER) B. Pay close attention to the correct spelling of your words. C. Make ...

Physics

A large turntable rotates about a fixed vertical axis, making one revolution in 6.00 s. The moment of inertia of the turntable about this axis is 1200 kg * mg^2. A childe of mass 40.0 kg, initually staning at the center of the turntable, runs out along a radius. What is the ...

Physics

A large turntable rotates about a fixed vertical axis, making one revolution in 6.00 s. The moment of inertia of the turntable about this axis is 1200 kg * mg^2. A childe of mass 40.0 kg, initually staning at the center of the turntable, runs out along a radius. What is the ...

math

I have no idea where to start! *A quick quiz consists of 3 multiple choice problems, each of which has 4 answers, only one of which is correct. If you make random guesses on all 3 problems, (a) What is the probability that all 3 of your answers are incorrect? (b) What is the ...

Math

An airplane's velocity with respect to the air is 580 miles per hour, and it is heading N 60 degrees W. The wind, at the altitude of the plane, is from the southwest and has a velocity of 60 miles per hour. What is the true direction of the plane, and what is its speed woth ...

Physics

I have a physics problem and it's below.

Astronomy

OK I have no clue how to do this . Can you believe that it is about -360¤F on Neptune,about -357¤F on Uranus? BRRRR ! That's cold! What is the temperature outside today in your town? How much warmer is it in your town than on Neptune? How much warmer is it in your town than ...

English

I am going to write an article about a semi-famous person. I won't be able to personally interview this person, so all of the information for my article will have to come from other sources. I realize that I will have to give credit to these sources with in-text citations and ...

Language Arts

(1)The most catastrophic natural disaster in the United States was a category 4 or extreme, hurricane that struck Galveston, Texas, on September 8, 1900.(2) A 15-foot storm surge killed more than 8,000 people on the low-lying island.(3) In a effort to prevent a similar ...

Math

if alpha and beta are the zeroes of the polynomial f(x)=x^2-3x-2 , find a quadratic polynomial whose zeroes are 1/2(alpha)+beta and 1/2(beta)+alpha ? Please... i have no idea !!

English 1

my assignment "suppose the person to whom Montresor is telling his sstory has turned him over to the police. Montresors lawyer might argue that his client is insane. the prosecution will argue that montresor knew exactly what he was doing, even planned in advance. write a ...

Math

Information from a survey on 175 persons about the goods, services and prices of a supermarket is as follows: 110 persons complained about the prices 67 persons complained about the services 55 persons complained about the goods 20 persons complained about goods and prices ...

help physics

If you have a pair of vernier callipers which have divisions of 0.05mm what would the absolute error be?

Physics

Can a vector have a component equal to zero and still have a nonzero magnitude? Explain.

Conceptual Physics

Why do citizens have a responsibility to have some basic understanding of nature's rules?

Science

1.Which of the following is a good study habit? A.maintaining a positive attitude ** B.waiting until the last minute to start on an assignment C.listening to the television while studying D.studying when you are tired 2. Your friend John complains about his poor grades. You go...

English

What do you suppose McPhee means by “the influence of Ernest Hemingway evidently extended to the Pentagon”? This is the context this question is referring to: And inevitably we have come to Ernest Hemingway and the tip of the iceberg—or, how to fashion critical theory ...

Plato's Allegory of Cave

Has anyone read the Plato's Allegory of Cave before? I got an assignment which is write a journal after reading this, but I really did not understand what it is talking about. Can anyone tell me something about it? Thanks. This site may help you. http://en.wikipedia.org/wiki/...

Novel [repost]

I've been brainstorming about the idea that Guru gave about the novel and here's what I have of the summary so far. I can't think of an ending for it though like a conclusion or even how she finds out that it's the crow. help please! Credits to GuruBlue from Jiskha Summary: ...

Grammar and Composition

how about this: Introduction—reader’s attention and states thesis statement. Paragraph 1 The first paragraph should get the reader’s attention and sate the thesis statement. ...

English - Oedipus Rex

I have to find evidence to support which character I think it the most guilty for what happens to Oedipus. I was just wondering if anyone knows whether or not Sophocles is trying to point the finger at someone other than Oedipus, who I think is the most guilty. My reasons are ...

Math

Write the ratio as a fraction in lowest terms of the number of residents at Adams to the number of students at Dodge. Adams=115 residents Dodge=295 residents Evans=140 residents Fisher=245 residents Brown=135 residents Carver=200 residents I have no idea on how to answer this ...

physics

I have 2 fill in the blanks that I need help with. 1) When electrons are forced away from a/an ___ plate, work is done. could the answer be positive? 2) Any pointed or angular surface of an object must have a/an ___ concentration of charge to establish equilibrium. I do not ...

Health

A patient's attorney asks her physician for medical records about the patient's care accident and promises to provide a written authorization from the patient later. The physician gives the attorney the patient's entire file, including her records about treatment for HIV. ...

Physics

A person consumes 2500 kcal/day while expanding 3500 kcal/day. In a months' time, about how much weight would this person lose if the loss were essentially all from body fat? (Body fat has an energy content of about 4100 kcal per pound).

physics

The thermal energy stored in 1 kg of gasoline is about 10,000 kcal (42,000,000 J). A small car needs a forward force of about 500 N to move slowly at a constant speed on a leveled road (no change in ME). How far should the car go if all the energy stored in 1 kg gasoline is ...

English Research Project Information - Sadako

For my english research essay, I will need two print sources. I am doing the topic on Sadako (the girl from "A thousand Paper Cranes") The librarians at my school told me that they didn't have any books on her. Do you know of a reference/nonfiction book about Sadako, or an ...

English

I have a few last doubts. Thank yo very much for your corrections. 1)The narrator can tell a story using a first- or a third-person. An internal narrator tells of his own personality. (or tells about?) 2) The story deals with (and not tells about) a family living in New York. ...

Math

x +/- 3 is that mroe simplified then writing it out x + 3, x - 3 I thought it would be becaue we normally say simple is when all of the operations that could be done is done in which case the second choice is more simple? I'm just woundering because i'm doing a summer ...

Chemistry - help

This is a test for chlorides in NaOH sample. 1.0g of NaOH was dissolved in 5ml of distilled water, acidified with 4ml of dilute nitric acid and diluted to 15ml with distilled water. This mixture was poured into a test tube containing 1ml of AgNO3 solution. However, I obtained ...

Ratios!!!!

8. Abby, Ingrid, and John are sharing a bag of candy in the extended ratio 2:3:4. If there are sixty three candies in the bag, then how many will Ingrid get? A. 7 B. 14*** C. 21 D. 28 9. Which of the following are equivalent to the ratio 3ab:27ab? Select all that apply. A. 1:9...

science

we are making a survival guide as a project. and my country is sri lanka. the whole idea is to make survival guide based on a person being stranded in sri lanka. that person would have no equipment other than clothes and the guide. we are given 4 dilemmas to write about to ...

English

1. You may have a jellyfish in the top middle (of the picture). 2. You may have a jellyfish on the top middle (of the picture).. 3. You may have a jellyfish at the top middle (of the picture). (Hello. Questions about how to use preposition? Are all the prepositions correct? ...

english essay

can someone proofread my essay please. Martin Luther king Jr, Mrs Gonsalvez, Mr Bryce what do they have in common? Well their leaders. Leaders are people who are kind and caring, But how did they become leaders?. Well they started off as a good student then good citizen then ...

calculus

Find an equation of the tangent line to the curve at y = cosx - sinx (pi, -1) I found y'= -sinx - cosx and used the equation of the tangent y = mx +b I input the values and get -1 - [(-sinx - cosx) * pi] = b the answer says it is y = x - 1 - pi I have no idea how the answer ...

Science

On the main sequence, what type will have life spans of about ten billion years? I took Earth Science last year so although I do not have them in front of me, I believe the are in the Earth Science Reference Tables (ESRT).

please help calculus

find the volume of the solid formed by revolving the region bounded by y=e^x, y=0, x=o and x=1 about the y axis by using the shell method, i got v=2*pi int(o to 1) (x)(e^x) dx and my teacher said the answer is e/2 but i keep getting a different answer Are you sure it is to be ...

algebra

Plug in (-1) for x. It will look like this: f(-1) = 4 *(-1) - 3 four times negative 1 equals negative 4, so... f(-1) = -4 - 3. negative four minus three is easiest to figure out with a number line...it equals negative seven. So: f(-1) = -7. And you're done! here is another one...

college math

A jet leaves a runway whose bearing is N26E from the control tower. After flying 4 miles, the jet turns 99 degrees and flies on a bearing of s55e for 6 miles. At that time what is the bearing from the jet from the control tower. I have no idea how to solve this please help!

Social Studies

The idea of "natural rights" means that a) Government has a right to rule because the citizens consent. b) Government authority is more important than citizens' rights. c) People are born with rights that cannot be taken away. **** d) People have the right to choose who will ...

Chemistry

From your experience, predict which of the following reactions are spontaneous. a) Zn(s) + 2H+(aq)--> Zn+2(aq) + H2 (g) b) CaCO3(s) + 2H2O(l) --> Ca(OH)2(s) + H2CO3(aq) c) CH4(g) + O2(g) --> CO2(g) + 2H2O(g) d) Ag+(aq) + Cl-(aq) --> AgCl (s) Our book spends very ...

physics

what are the units of wavelengh They can be any length units, but it is common to use meters for radio waves, centimeters for microwaves, micrometers for infrared, and nanometers or Angstroms (10^-8 cm) for visible and ultraviolet light. Regardless of what I wrote in my ...

Quick Question #2 (URGENT)

How would show/ask 'What is your phone number?' in symbols and pictures. Would having a picture of a telephone and the number sign beside it, and write equal sign then question mark demsonstrate this question? Example: phone pic (#)=? If my idea doesn't demonstrate the ...

Chemistry

What are the charges of the ions in an ionic compound containing iron(III) and fluoride ions? a)iron(III)- i got 3+ b) flouride- im not sure on this one c)Write the formula for the compound. (Type your answer using the format CO2 for CO2.) - Fe3F2... i rly have no idea on this...

ap chemistry

Discuss briefly the relationship between the dipole moment of a molecule and the polar character of the bonds within it. WIth this as a basis, account for the difference between the dipole moments of CH2F2 and CF4. does anyone have any idea? the greater the dipole moment of a ...

calculus

Evaluate the integral ∫∫∫2xzdV bounded by Q. Where Q is the region enclosed by the planes x + y + z = 4, y = 3x, x = 0, and z = 0. Answer=16/15 Is this answer correct? cause i've tried doing this problem a bunch of ways and i never even get close to 16/15. i ...

More Physics

A light plank rests on two scales that read Fg1 = 410 N and Fg2 = 310 N. The scales are separated by a distance of 2.00 m. How far from the woman's feet is her center of gravity (the woman is laying on a plank with scales on both ends supporting the woman and plank)? You have ...

Language Arts (3 questions)

Question #1: Which characteristics make "The Rider" a lyric poem? a. It uses musical language and expresses feelings b. It tells a story about a historical event c. It rhymes and has a regular rhythm d. It uses repetition and describes a natural event According to what I have ...

Writing Skills Writing Assignment

I am trying to complete a 750 to 1000 word essay but I completely have no clue what to write about and my writing skills is a bit lacking. It needs to be about a personal experience. I have more info if needed.This is the final paper result. Your final paper should be at least...

Physics

An elevator operates on a very slow hydraulic jack. Oil is pumped into a cylinder that contains the piston. The piston lifts the elevator as the internal cylinder pressure (P2) rises in comparison to the outside pressure (P1=101,325 Pa or about 14.7 psi). If the piston can ...

Physics

An elevator operates on a very slow hydraulic jack. Oil is pumped into a cylinder that contains the piston. The piston lifts the elevator as the internal cylinder pressure (P2) rises in comparison to the outside pressure (P1=101,325 Pa or about 14.7 psi). If the piston can ...

math HELP

Okay the questions is I have 100 dollers to spend and I most buy 100 shoes. Flip flops are .10 each High heels are 2.00 each boots are 5.00 You have to buy at least one of each. I have been working hard on question and I feel like I am about to pull my hair out. you need to by...

physics

A woman pulls a 23 kg suitcase using a rope attached to the suitcase at an angle of 38 degrees to the horizontal. The coefficient of static friction of the suitcase with the floor is 0.3 and the coefficient of kinetic friction is 0.2. a) Draw a situation and a force diagram of...

Geography

I'm doing a Map of the Month, and i'm almost done. I just have to locate and lable 3 rivers. (Helmand River, Amu Darya River and Indus River). I'm having some difficulty trying to find a clear map that labes the at least one of the lakes, so if anyone had any idea where to ...

chemistry

We did a LAB where we used a spectrophotometer to measure the absornency of a solution. It was a bluish color, so the question is.... What could be done to modify this experiment if the original solution was colorless? HINT: you can NOT add a coloring agent such as food ...

Chemistry

If acetic acid is the only acid that vinegar contains [Ka = 1.8*10-5] , calculate the concentration of acetic acid in the vinegar. pH of vinegar is 3.20 _______________ First I got the antilog of the pH given, which turned out to be 6.309E-4. Then I did [(6.309E-4)^(2)]/(1.8E-...

reading

Why isnt an ant suture not a good idea?

science

whats the big idea of partcles?

science

what is the big idea of energy transfer

English

How do you know what the topic and main idea of a paragraph is?

Calculus 1

Calculate f'(-1) f(x) = x^7 * h(x) h(-1) = 5 h'(-1) = 8 Answer is 27, but I got no idea how to get there.

english

What is the main idea of the shepards daughter

biology

What is the main idea of metabolism. please help

history

who came up with the idea of the school bus?

Pre Calculus

e^-x sqrt(3e^2x -5/4) = e^x No idea how to approach this.

Geography

Who is assosciated with the idea of the cultural landscape

Language arts

What is the central idea of the selection

ELA

What is the implied main idea of the passage>

Language

The tide rises, the tide falls, The twilight darkens, the curlew calls; Along the sea-sands damp and brown The traveller hastens toward the town, And the tide rises, the tide falls. Darkness settles on roofs and walls, But the sea, the sea in the darkness calls; The little ...

Stock question

I have to write about the positive effects of an investor buying stocks of a company but I would like to know about the negative affects so I could add them to my essay but I cant really understand how it could be bad for an investor to buy a stock of a company,.. could you ...

ENGLISH HW CHECK

Choose the correct answer for the ALL CAP word 1. My father always COMPLAINS that my sister's boyfriend is lazy. Answer a. complains b. complain c. complained d. complaining 2. Uncle Frisbee, who BE as bald as a grapefruit, buys every new hair-growing tonic he HAVE heard about...

art

hi do you have any ideas for the following project: i need to pick any environment and document a message or issue about it in that exact environment, e.g. take a photo of my work in that place. i'm thinking about focusing on the issues of energy wastage but don't know which ...

History

Which answer summarizes the main topic of the Constitutional Convention? A.)They argued about federalism and how the federal and state governments would share power. B.)They argued about the Articles of Confederation and how to change it to serve the government better. C.)They...

ela

in chapter 9 site specific examples ex: ms.maudie is thoughtful of other "only thing i worried about...was all the danger and commotion it caused... this whole neighborhood could have gone up." i did all of them except these please help atticus tie racism to a lack of ...

Chemistry

Calculate the amount (g) of each of the following salts that need to be added to a 200 mL volumetric flask to produce a 2 M solution of S. CaSO(subscript 4) [NH(subscript 4)subscript 2]SO(subscript 4) NOTE: the subscript 2 is outside the (NHsubscript 4) Fe(subscript 2)[(...

AP environmental Science

Can someone please explain what this means to me in english? i've read it a million times and i have no idea what it means. Thanks for any help!!! "Scientific evidence shows a direct relationship between sea level and the global mean atomospheric temperature during the past ...

physics

A typical woman gives off heat at the rate of about 8000 calories per hour. How long would a woman have to stay in a bath of 60L (60,000g)of 26*C water in order to raise the water temperature to 30*C. Presume that all the heat given off by the woman is transferred to the water...

physics

A typical woman gives off heat at the rate of about 8000 calories per hour. How long would a woman have to stay in a bath of 60L (60,000g)of 26*C water in order to raise the water temperature to 30*C. Presume that all the heat given off by the woman is transferred to the water...

physics

A typical woman gives off heat at the rate of about 8000 calories per hour. How long would a woman have to stay in a bath of 60L (60,000g)of 26*C water in order to raise the water temperature to 30*C. Presume that all the heat given off by the woman is transferred to the water...

Education

Does the Individuals Disabilities Education Act (IDEA) and the Education for the Handicapped Act Ammendments of 1986, focus on services provided to families, children, communities, or to schools? I am thinking they provide services to families. Don't they? Education of the ...

AP Statistics

Do the samples appear to be from the same population? Why or why not? Support your answer with numerical facts and convincing reasons and explanations Chemical distribution stats: Five # summary: (2.29816, 2.29869, 2.299152, 2.30074) Mean: 2.299706 Standard deviation: 0.001313...

critical thinking

WHAT BACKGROUND INFORMATION CAN YOU HAVE ABOUT CLAIMS

french

i have some questions to ask about how to spell it in english

English, Social studies

1. We had a sleepover at Susan's house. 2. We had a sleepover party at Susan's house. (Which expression is correct? Are both grammatical?) Q2: Do only girls have a sleepover? How about boys? Do they have sleepover parties? Do all teenagers have sleepover party in the USA?

algebra II

Thank you for your prompt response. I have my homework I have to turn in in about 2 hours, but i am struggling to solve this question. Is there any way you can just give me the answer while I find a website that can show me step by step how to solve these kind of problems? I ...

english

I have a data story to write on employment and in my city unemployment for blacks is double the amount it is for whites.. I'm suppose to speak with employment agencies and speak with them about this issue. Do you guys have any suggestions of any statistical questions I could ...

Chemisty

Aluminum hydroxide forms a positively charged sol. Which of the following ionic substances should be most effective in coagulating the sol? NaCl CaCl2 Fe2(SO4)3 K3PO4 The idea behind coagulating sols is to use those salts that have the highest + and - charges and the most ions...

Chemistry

Aluminum hydroxide forms a positively charged sol. Which of the following ionic substances should be most effective in coagulating the sol? NaCl CaCl2 Fe2(SO4)3 K3PO4 The idea behind coagulating sols is to use those salts that have the highest + and - charges and the most ions...

physics

What airspeed would a plane have to travel to have a groundspeed of 320 km/h [S] if there is a 50.0 km/h wind coming from the northwest?

Physics

Your dog has been diagnosed with a terminal illness for which there is no cure. The Veterinarian expects that it will live for 1 year before it succumbs to the condition. You have the idea that if you could keep the dog alive a little longer, a cure might be found. You decide ...

physics

i have given an assignment by school to prapare a working model of physics. Please give me some tips.

math

The head of an industrial machine moves in a straight line horizontally backwards and forwards from a central position. The movement can be modelled using the sine wave d = 80 sin ( pie t), where d is the horizontal distance (in cm) from the central starting position, and t is...

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