physics please HELP !

128,227 results, page 92

Comprehensive science ADV

Overview: Enviromental problems, Endangered animals are becoming endangered one of the examples are the panamian godlen frog. And when i posted the first question it was the wrong one!! The real one is... Question: Describe What is being done to save endagered frogs. for ...


Can you please check this short letter of enquiry, please? 1) My husband and I are looking for a double room plus an extra bed for my six-year-old child for 14 nights from 4 July to 18 July. 2) In particular, we would like to know your rates in half board (breakfast/dinner) ...

grammar punctuation

Fine the error in punctuation or capitalization 1. "After you've rested," Frank said, "please help me move these boxes." "Can we wait until later?" asked Emily. "I have a lot of homework." "It won't take very long." replied Frank. (my choice) Emily told him that she would be ...


I read this section, still don't get it. Respond to the following questions from Duiker p. 186. Please be sure that you respond to each question fully for full credit. Please note: in order to respond to the following questions you should have read the chapter and have an ...

Algebra--to Bob (Please)

Bob, thank you for the info. You always make everything sound so easy. Yu are so smart! And, I am not! If you will, please answer further. For example the first number is 1415926535, when it says make a graph fo the frequency of each digit. I look through the other 99 numbers ...

Chemistry(Please check)

. Ksp for Fe(IO3)3 is 10-14. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 10-4M and [IO3-] = 10-5M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would you agree? ...


Please help me! 1)1. Two charged point bodies are placed into the opposite on diagonal vertices of a rectangular with sides of 6 and 8 cm in vacuum – Q1=3.2x10-11 C; Q2=-4.267x10-11 C. Calculate the electric field intensity at two other vertices of the rectangular and the ...

Physics, please help today!

0.0100kg particles have been glued to a rod of Length L=6.00cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate (a) from 0-20.0 rad/s, (b) from 20.0 rad/s to 40.0 rad/s, and (c) ...

Math Please check

The electricity meter on Donna's house read 71,236.4 kwh at the beginning of March and 73,196.2 kwh at the end of March. She pays 7.4 per kwh. What is the amount of her electricity bill for March? Round to the nearest cent. I came up with $145.03 Would you please check to make...

Math (Please help!!)

Given A(-4,-2), B(44), and C(18,-8, answer the following questions Write the equations of the line containing the altitude the passes through B in standard form. Write the equation of the line containing the median that passes through point C in slope-intercept form Write the ...


As a contrast between the old and the modern and between the large and the small, consider the following: In old rural England 1 hide (110 acres) was the area of land needed to sustain one family with a single plough for one year. (An area of 1 acre is equal to 4047 m2.) Also...


Someone please help 2. You toss a coin 15 times. P(heads) 2/5 = • experimental; the result is found by repeating an experiment. **** • experimental; the result is based on the number of possible outcomes. • theoretical; the result is found by repeating theoretical; the ...


I don't if I'm right for these two questions i just need a check if I'm right,if I'm wrong please show me how to get that answer. Rewrite the following exponential functions as logarithmic functions a)f(x)=9^x ans:f(x) Log^-1(xlog(9)) b)f(x)=(7/8)^x ans:log^-1(x(log 7 - log 8...


A proposed mechanism for a reaction is: (i) A + B2 = AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 = ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 = AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining step? Explain why. (ii) It ...


Archimedes principle. The weight of the bouy is given, so the weight of water displaced by the submerged part of the bouy equals that. Figure the volume that weight of water displaces, then figure the height of a .33m diameter column of water will have of that volume. A large ...


for the equilibrium H2+CO2<-->H2O+CO Kc=3.18 at 1106K. if each of the four species was initially present at 3.000M calculate the equilibrium concentration of the CO at this temperature..... OK I can get as far as equilibrium (final) H2O=3.000-x CO=3.000-xx H2=3.000+x CO2...


For a question in physics... I was told to draw a graph of vertical displacement, y, versus time, t, in 2sec increments from 0 to 1.8. What was given to me was: v_yo_= +10m/s v_xo_= +5m/s a_y_ = -10m/s^2 So I used the formula: y=vo+1/2at^2 I drew the graph, and got a parabala...


Point E(0, -2) is a vertex of square DEFG. After a 90* clockwise rotation of the square about the origin, which of the following is the location of E? A. (-2,0) B. (2,0) C. (2,2) D. (0,2) Point D(-3,5) is a vertex of triangle DEF. After rotation of the triangle about the ...


A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.845 m/s encounters a rough horizontal surface of length scripted l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a constant ...


Could someone please tell me what equations i am suppose to use to work out these problems. A capacitor in RC circuit has two overlapping plates of width 3.40 m and length 8.90 m separated by 2.60 cm. A dielectric of dielectric constant being 73.0 fills the space between the ...


I need immediate help on these questions:. 2.a small plastic ball with a mass of 0.005kg is suspended from a thread and hangs in equilibrium as shown in the drawing below when a small rod with a 2 uC charge is brought to within 3mm of the ball a)find the tension force in the ...

Paul Martin

Who knows what website I can go to for some baby pictures of Paul Martin? It is for my social studies project. Thankz:P I did an internet check and found only pictures of the Prime Minister as an adult. I suggest you try finding a biography in your library. There is also a ...


To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 2.40 m apart If the left scale reads 278 N, and the right scale reads 116 N, calculate the student's mass. Calculate the distance from the student's head ...


To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 2.44 m apart. If the left scale reads 309 N, and the right scale reads 125 N, calculate the student's mass. Calculate the distance from the student's head...


Could you please check my answers and help me out with the last two? Thanxs! 1.Carefully define the following words: distance, displacement, speed, velocity, acceleration. Does it make a difference if we designate distance as "x" or "d"? (I don't understand this question) 2....

Math please help hurry

A submarine is travelling parallel to the surface of the ocean at a depth of 626m. It begins a constant ascent in order to reach the surface after travelling a distance of 4420m. The ascent takes 35mins. A.) what angle of ascent or angle of elevation would the submarine need ...

Math ASAP please

13. Mia charges $2.25 per hour when she babysits, plus $5.00 for transportation expenses. Write a function rule to represent the amount y Mia charges to babysit for x hours. (1 point) y = 2.25x + 5.00 y = 5.00y + 2.25 y = 5.00x + 2.25 y = 7.25x 14. The sale price of ground ...


Will someone please look over these? I am so lost on these. 1. find the domain of p(x)=xsquared+10- I said {x|x is a real number 2. find the intercepts of 3x+2y=6- I got (0,3) and (2,0) 4.find the equation of (-6,-6)and (6,6)- got y=x 7. slope and y-intercept of x+2y=4- got ...


Indirectly affected person 1 or group 1 when mountain climbing unprepared please help and thank you person 1 or group 1 means first person or group to be indirectly affected Indirectly affected person 2 or group 2 when mountain climbing unprepare please help and thank you last...

writing/language arts

Hey! I'm supposed to write a 3-4 page essay, describing something or someplace. So I choose my balcony.. I live on the seventeenth floor and using my 5 sense I described it as best as I could :) I was wondering if you would suggest some similes, metaphors, hyperboles, ...


A 1.00 kg hollow ball with a radius of 2.2^10^-1 m, filled with air, is released from rest at the bottom of a 1.50 m deep pool of water. How high above the water does the ball shoot upward if the upward force exerted by the fluid on the ball 40 N? Neglect all frictional ...

Chemistry -please help!

A zinc-copper battery is constructed as follows at 25°C. Zn|Zn^2+ (0.15 M)||Cu2+(3.00 M)|Cu The mass of each electrode is 200. g. a) Calculate the cell potential when this battery is first connected. - i got this to be 1.14V b.) Calculate the cell potential after 10.0 A of ...

math(please help me!!)

4x^2+20x+5y+xy *you have to factor by grouping,for more information just ask me* First, take out 4x from the first two and y from the second: 4x(x+5) + y(x+5). Then combine the 4x and the y: (4x+y)(x+5). That's your answer. thanks. - can you help me with this one? *48x^2y+20xz...


Can you please go step by step, Ill show what I did and you can correct me. The question is: a+a(x+1) My way: a+a(x+1) 2a(x+1) 2ax+2a Could someone please check over this and provide a correct answer and my error. Thanks in advance. a+a(x+1) does not equal 2a(x+1) If it was (a...

statistics/please check calculations

questions reads as follows: sat scores around the nation tends to have a mean score around 500, a standard deviation of 100 points and are approximately normal distribution. a person who scores 600 on the sat has approximately what percentile rank within the population? please...


Can you show work please..? 1. Joe is sledding down a snow hill when he collides with Mike half way down the hill. Joe and the sled have a mass of 65 kg and their velocity before the collision was 12 m/s. If Mike has a mass of 55 kg, what velocity would Joe, Mike, and the sled...

math(check answers please)

please check my answers and thanks have a nice day. 2.which of the following ratios is equivalent to 5/20 A.1/4(I PICKED THIS) B.1/5 C.20/100 D.2/5 3.which of the following ratios is ((NOT)) equivalent to 4/8? A.1/2 B.2/4 C.20/45(I PICKED THIS) D.12/24 4.which of the following...

PHYSICS helppppp

A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m. (A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of the baseball at the ...


An object is placed on an incline with friction. The incline is slowly raised from a zero degrees and at 29.2 degrees, the object begins to slide down the incline. The incline is then raised to 40.5 degrees and the object is placed back on the incline. The coefficient of ...

Science Please Help!!!

Which best describes a cave ecosystem? A) Plentiful food, widely varying temperature B) Plentiful food, constant temperature C) Very little food, widely varying temperature D) Very little food, constant temperature I think it's either C or D....maybe C??? Please help! (=

please help

hi im trying to order something online im shipping it to brooklyn ny but i don't know if im apo or fpo please someone help .someone posted this but i still don't know if im apo or fpo can you tell me if im fpo or apo i live in brooklyn ny Since this is not my area of expertise...

Foreign languages

Writeacher, thank you very much! Can you please check these sentences, too? 1) They left for the supermarket a few minutes ago.My child is with them. They need to buy food for lunch and won't be back until noon. We'll spend the afternoon at home because it's scorching hot ...


Help, Please! I don't quite understand what is asking in this assignment (Essay) Task: Write an essay that compares Frankenstein and his creation to a modern zombie story with the focus on how a monster might be used as a metaphor for science or scientific advances and/or how ...


Decide whether each of the following statements are T-True, or F-False. A) Velocity anti-nodes of standing air waves occur at closed ends of tubes. B) Pressure nodes of standing air waves occur at closed ends of tubes. C) Velocity nodes of standing air waves occur at open ends...


The red supergiant Betelgeuse has a surface temperature of 3600 K. a) Using the fact that the Sun's surface temperature is about 5800 K and that its continuous spectrum peaks at a wavelength of 500 nm, find the peak wavelength of Betelgeuse's continuous spectrum. (Please enter...

Computing: Simple Python

Hi this is the code I'm working on, but every time I run it, every character inputted is printed, so hello becomes 'h','e','l','l','o', even numbers! I can't seem to fix it so that it can be added to the list and printed normally, thanks! #Printing the original list (This was ...


Did I translate these two sentences correctly? (please forgive my accents)I know the words that I need, but I am not sure how's the ordering in the sentence. What days do you have your french class? = Quel jours tu as un cours de francais? I have french class every monday and ...


i need to know if I am in the right tract please let me know...I am calulating the molality of the following exercise so I could be able to apply the formula T=Kf * molality calculate the freezing point of a solution containin 12.2 grams of benzoic acid, dissolved in 250 grams...


I left out the following statements. Could you please if they are possible, please? 1) Oscar Wilde was a great novelist. Moreover/Furthermore/Further/ he wrote very funny comedies. Italy is wonderful. In addition, Italian people are very friendly. 2) This hotel is very big as ...

math calc. asap asap please

the point on the curve is 4y=x^2 nearest to (7,2) is: this is what i did: i solved for y and I know that the there's a tangent line at (x1,y1). so using y-y1=m(x-x1), I found the lines of the tangent and perpendicual lines: slope is derivative so it is 1/2x1 tangent: y-y1=.5x1...


Please can someone show me the steps to do this problem?? Also, please don't tell me to just google the solution because I've already tried and have tried to do this problem by myself for hours now...Thank you so much. You are measuring trees in a forest. Standing on the ...


Please can someone show me the steps to do this problem?? Also, please don't tell me to just google the solution because I've already tried and have tried to do this problem by myself for hours now...Thank you so much. You are measuring trees in a forest. Standing on the ...

French study help

Could anyone please give me some useful web site to learn and practise my french on? I have trouble with the tense, forming sentences,pronunciation etc.(I get confused over these stuff a lot.)and I am a beginner. Or if anyone have any advise on learning french,other than ...

Math-- Please check

A package of 16 tea bags costs $2.29. Find the unit price in cents per tea bag. Round to the nearest tenth of a cent. I get 14.3 cent Will you check to make sure I am correct? How do I round it to the nearest tenth? Or is it already rounded to the nearest tenth? Please help! ...

Please answer two math questions!!!

10. From the 2010 census data, the population of Texas was about 2.5 x 107 people. Florida’s population was about 1.9 x 107. Idaho’s population was about 1.6 x 106. Which of the following statements is true? a)Idaho has a larger population than Florida. b)Florida has a ...


Hello I'm having trouble with this physics question: You are examining the loss in intensity as light passes through a fibre optic cable. The input intensity is measured as 55.1 W/m2 and the output intensity as 28.7 W/m2. Calculate the attenuation of the signal in decibels (dB...


The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in the Figure 16-44 in the textbook. Assume that the net average charge (due to electron sharing) indicated on H and N atoms is 0.2e and on the indicated C and O atoms is 0.4e. ...


a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. help please 25g/58.44g NaCl=.428 mol 1000 grams of solvent H20 25g/58,...

Math Please Help

Simon travels north and south from Main Station. The distance, in km, of the train from Main Station is modeled by the function 𝑑(𝑡) = 𝑡 3 − 9𝑡 2 + 6𝑡, where North is positive and South is negative. Time elapsed after the start of ...


HI, can someone can please help me find the coordinates of the two halfway points of the principal cycles. Here are some answers that might help. -I found the interval: (0,pi/2) -The equation of the left vertical asymptote: x=0, and right asy: x=pi/2 -The coordinate of the ...

Introduction to the Criminal Justice System

There is a large round up of gang members, this is a federal case but is being supported by about 50 local officers and state troopers. I need help please, coordinating he informaiton for briefing on the jprocess at the federal court building. the briefing is to detail what ...

CHemistry....Please help...DrBobb

I posted this up yesterday: I have to use the equation : density= mass/ volume: But i don't know how to find out the volume using the edge length of the unit cell which is 5.88* 10^2 pm. CHemistry....Please help - DrBob222, Sunday, January 25, 2009 at 10:41pm If the edge ...


Would you please check my answer to make sure I did it right? Bus travel, a bus company finds that monthly costs for one particular year were given by C(t) = 100 + t^2 dollars after t months. After t months the company had P(t) =1000 +t^2 passengers per month. How fast is its ...

Physics repost

A wave traveling in the +x direction has an amplitude of 0.45 m, a speed of 6.1 m/s, and a frequency of 16 Hz. Write the equation of the wave in the form given by either Equation 16.3 or 16.4. (Answer in terms of t and x. Assume standard units.) For Further Reading Physics - ...


hi, Can you please double check to see if i have got this right? Is the empirical formual for oxide of arsenic As2O5? Cheers ;) Arsenic forms two oxides with oxygen. One is As2O5, the other is As2O3. I'm glad you posted today; please tell your friend you were talking with ...


could someone please help me i have to write about the start of life on a extrasolar planet and talk about chemical evolution,, could someone please give me some pointers Is this S103 ECA? yes it is im just need some pointers so that i can do the work in my own words but i don...

Please Check This 2!

p^4-1=(p^2)(p^2+1) Typo? p^4-1=(p^2-1)(p^2+1)

math please help

how do u simplify this (ab^2c^3)^4

math helpp please!!!

2Y-1 p-1 ----- - ---- 2y+5 p+3


I need help with this Can you anyone please help? Thanks :) 5(r+3)+7r

math- check this please

1. 3t<-9=t<-3 2.4m>8=m>2 3.10<-2w 5<w 4.-20>-5c 4>c 5.-27>3z -9>z 6.-7b>42 b>6

math..please help

Factor 5A^4 - 5A


Solve x^2 + y^2 = 36 y = 6 - x^2 Can you help me please


Please help me evaluate (1/6)^3(1/6)^3


please help me simplify (8(x^3y^4)2)-2


Please help simplify (5-2x)^2


y=3x-23 4y=x+7 Need to do y=y PLEASE HELP

Calculus- Help please

I don't know how to do this, so I can't graph it. f(x)= 1/x-4 Thank you for the help.


(x+1)/(x+3)(x-3) + 4(x-3)/(x-3)(x+3) + (x-1)(x-3)/ (3-x)(x+3) please explain how you get it


3b-2/b+1=4-b+2/b-1 please help me I'm stuck


i need help please!!! 20-(x-5)=3(3x+5)


please help me solve this.


Please show that 1/(g o f)(x) - 1-(g o f)(x)/(g o f)(x) = 1


Evaluate K^2 -5 When K = -6


if xy=7 and x-y=5, what are the values of x and y? please help me!!!


if xy=7 and x-y=5, what are the values of x and y? please help!!!


8x^0(10x^-2)(-2x^-6y^7)= ??? please help


Please faCtor. Thank you for your help. a^2 + 4a + 21


Can you help me set it up please?


x^2 = x^2-1 = x^2-1 = (x-1)(x+1) -x = 1 x-1 x-1 Is this right, please help thanks

math help please!!

simplify (5x^7)^4

Can someon e please help me (Algebra)

2x(x+2)(x^2 - 2x + 4) = 0


help below please


Please help Simplify (p^-4+m ^2m)^-4/(p^-4)^-m


Please Factor (m + 4) (a – 5) + (m + 4) (a + 3)


Please Simplify 5x^-2 - 3y^-1 -------------- x^-1 + y^-1


Please Simplify ( 3x^5 y^-8)^4 ) (------------- ) ( z^-2 )


Please Compute 1.2 X 10^-3 ----------- 6.0 X 10^-8


Please Simplify: 1 4 --- + --- x+2 x^2-4


Please Simplify 1/x+2 + 4/x^2-4


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