physics please HELP !

130,813 results, page 45

  1. *English-Please Proofread my essay ASAP*

    Could you please proofread my argumentive essay, check for fragments and prounoun use. Thanks! Is Beauty Really Skin Deep?
  2. Math

    I still do not understand how to solve the following problem. Please show step-by-step. x = Integral (0 to v) dv/(q^2-v^2) where q = constant the answer is --> x = 1/2q ln (q+v/q-v) 1) Where 1/2q came from? 2) Where ln came from? Is there a formula for it? Please help!!!!!!!
  3. Math Urgent

    (k+3)^2=(2k-1)^2=0 Please help me solve this equation or maybe one like it......I keep doing it wrong. 6p^2(p+1)=4(p+1)-5p(p+1) I also keep doing this problem wrong. I have the answer but I don't understand how its done. Please help!!
  4. Health care please check answer

    Please check my answer thank you Verifying the accuracy of HCPCS codes is an important function in what ? I think that it is maintence of chargemasters
  5. geometry

    please help find answer. very urgent. triangle PQR is a 30-60-90 triangle with right angle Q and segment PQ as the longest. Find the possible coordinates of R if (2,6) and Q (2,-6). please help
  6. Math(Please check)

    Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
  7. chemistry

    hi Dr Bob..can you please help me with this chemistry problem? I got problem dealing with the chemical formula.How i want to find the number of moles of 2g of Fe(NH4)2(SO4)2.6H2O???please help me.Thank you
  8. Algebra II

    Could someone please help me or direct me where to get help What is the exact value of cos 60 as found on the unit circle? and the value of cos 5pi/3 Please show me the steps so I understand Thank you
  9. English

    Can you please chec this question, please? Thank you. 1. Write briefly what Italian teenagers like wearing at the moment. Then refers to what sort of clothing you like wearing
  10. URGENT!! 7th Grade Math Help Please!!

    2. Price of the iPad Mini: $329.00 Price of the iPad with a 15% discount. Show all of your work please!! [4 points]
  11. calculus

    Determine the quadratic function f, whose graph is given. **The graph given is (0,-2) and (3,-11) The vertex is (3,11) and the y-intercept is -2 So, f(x)= **Please help me understand how to do this question. Could you please show work?**
  12. calculus

    can someone please help me find all the zeros of the following polynomial. write the polynomial in factored form. f(x)=x^3-3x^2+16x-48 can you please show all work
  13. Physical Science- Balance Equations

    Hi! Can someone please balance these equations, please?! I'm having major trouble! Thank you! HCl (aq) + NaHCO3 (aq) ¨ HBr (aq) + NH3 (aq) ¨ LiHCO3 (aq) + HI (aq) ¨
  14. science and english only for ms sue

    what the steps to the water cycle and what is the writing process and what the steps for 7th grade and please help me as soon as possible please ms. sue...
  15. Social Studies-Please Help

    Which of these nations has the highest population density? A) China B) Indonesia C) Mongolia D) Japan Is the answer japan or china, I'm not sure, can someone please help? Thanks! (=
  16. Math help please

    A statement Sn about the positive integers is given. Write statements S1, S2, and S3, and show that each of these statements is true. Sn:   2 is a factor of n2 + 7n Could you please show your work? I want to know how to solve.
  17. Please explain (Math)

    Let A and B be subsets of a universal set U and suppose n(U)=210, n(A)=100, n(B)=60, and n(A∩B)=30. Compute n(Ac∩Bc). 80 150 100 90 180 200 Please help. Thank you
  18. English

    Hello. I would be very grateful for some help. Please help me to make the sentence correct: "Please let me know when the letter comes so that I don't worry / so that I won't worry / for me not to worry / lest I worry." Thank you.
  19. Math

    In a class of 156 students who took maths and physics they all passed at leat 1 subject 75 pass math and physics.if twice has passed physics find how many students pass math only. Represent in Venn diagram.
  20. history

    Hi. I know i asked this already but can someone please please just give me a straight answer. I have to write a 5 page paper on wheter or not charles G. Finney believed that the first amendment's clause about the free practice of religion be amended in any way Thank you for ...
  21. science

    Can you please tell me where is the sun in our galaxy? Also, some binary stars are called eclipsing binaries. Explain why this term is appropriate. (it gives a hint, saying: think about Algol as you come up with an answer.) I don't get it... Please help :) Thank you very much!
  22. art-please help

    I have spent a lot of time researching and I can't find this. I wrote a paper about the mona lisa and the last supper. I need a sentence from each that tells how they reflect or define the dadaism period. Can someone please help with one or point me in the right direction. ...
  23. Chemistry

    In the haber process for the preparation of NH3 which is given by the equilibruim? N_2_(g)+3H_2_(g) <---> 2NH_3_(g)...... delta H= -92.38kJ State the conditions of concentrations and temperture that will favor production of NH_3_? Please help! would it be high ...
  24. History NEED HELP

    Queen Elizabeth I - 1558 - 1603 Did she support or contradict the principle of tolerating other ideas or cultures? Explain why. 3 examples please This is the only question I couldn't find answers to in my textbook. I have to write an essay and include my answer to this in it....
  25. physics please help!

    Suppose that 90 g of hot water at a temperature of 75 degrees C is poured into a cavity in a very large block of ice at 0 degrees C. (a) What will be the final temperature of the water in the cavity? (b) What mass of ice must melt in order for the water to cool down to the ...
  26. physics( PLEASE READ)

    a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend? (b) how for has he ...
  27. PHYSICS

    A tennis ball is thrown horizontally from an elevation of 20.60 m above the ground with a speed of 21.0 m/s vertical m from ground??? f the ball is still in the air, how long before it hits the ground? (If the ball is not in the air, enter 0.)???? If the ball is still in the ...
  28. Physics 111 PLEASE HELP ASAP

    A 37.5-kg child swings in a swing supported by two chains, each 3.05 m long. The tension in each chain at the lowest point is 433 N. the force of the seat on the child is 498.5 N. b)Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the ...
  29. Physics waves- help please

    1. A person is listening to a new instrument capable of sounds ranging from 10 dB to 150 dB and with frequencies from 12 Hz to 30,000 Hz. Comment on the suitability of this instrument for the musician or audience. 2. A guitar emits a 440 Hz tone. How far apart are the crests ...
  30. statistics

    The distribution of B.A. degrees conferred by a local college is listed below, by major. Major Frequency English 2073 Mathematics 2164 Chemistry 318 Physics 856 Liberal Arts 1358 Business 1676 Engineering 868 9313 What is the probability that a randomly selected degree is not ...
  31. Physics

    I need more help on these, please? jiskha. com/ display.cgi?id=1165350274 jiskha. com /display.cgi?id=1165357718 jiskha. com /display.cgi?id=1165347130 Thanks... I'm desperate. I've been gone today and yesterday from school and don't quite understand what we're learning.
  32. Physics- PLEASE HELP

    A 10.0 kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 16.0 m/s, determine (a) the translational kinetic energy of its center of gravity.(b) the rotational kinetic energy about its center of gravity, and (c) its ...
  33. Physics PLEASE HELP

    After 6.00 kg of water at 77.3 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in entropy can be shown to be...
  34. Physics

    A pinball machine uses a spring that is compressed 4.0 cm to launch a ball. If the spring constant is 13 N/m, what is the force on the ball at the moment the spring is released? I don't understand this I guess... Does the ball leave the spring at the equalbarium position four ...
  35. Physics

    The potential energy of a particle on the x-axis is given by U+ 8xe ^-xsquared/19 where x is 1 meter and U is in Joules. Please find the point on the x-axis for which the potential is a maximum or minimum. I've worked it three times and I get these three answers. Which one is ...
  36. Physics

    user-generated content: report abuse What approximate change in decibels does an observer experience from a sound source if the observer moves to a new location that is 67% as far from the source? My answer choices are 23, -23, 40, 2.76, -2.76, 1.94, -1.94, 2.57, -2.57, and 0 ...
  37. Physics (Please Help)

    An astronaut lands on an alien planet. He places a pendulum (L = 0.200 m) on the surface and sets it in simple harmonic motion. a. What is the period and frequency of the pendulum’s motion? b. How many seconds out of phase with the displacements shown would graphs of the ...
  38. Physics

    The pendulum bobs in the figure are made of soft clay so that they stick together after impact. The mass of bob B is 14 times that of bob A. Bob B is initially at rest. If bob A is released from a height h above its lowest point, what is the maximum height attained by bobs A ...
  39. physics

    A car travels in a straight line with an average velocity of 85 km/h for 2.5 h and then with an average velocity of 30 km/h for 1.5 h. (a) What is the total displacement for the 4 h trip? _____________________ km (b) What is the average velocity for the total trip? ...
  40. Help me please with physics

    A 25kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. a) what speed does the mass have after 4.0 seconds? b) what speed does the mass have after being moved 2...
  41. physics

    A small pumpkin of mass 2.22 kg is dropped from rest from a height of 2.87 m. The pumpkin rebounds from the ground to a height of 1.12 m. a. With what speed does the pumpkin hit the ground? b. With what speed does the pumpkin leave the ground? c. What impulse was given to the ...
  42. TO ALL STUDENTS

    ... including "inverkeithing high school" [see #s 2 and 4] -- Please remember these things: 1. This is a homework help website; please put your subject (math, science, English, or ??) in the subject line to make it faster for each teacher to find those questions in his/her ...
  43. Physics

    Help me with this question, please How will the total voltage of a string of light bulbs in series change as you add more bulbs to the string? A. The total voltage will decrease B. The total voltage will stay the same C. The total voltage will increase d. You cannot predict ...
  44. Physics

    Please someone help..A horizontal pipe 10.0cm in diameter has a smooth reduction to a pipe 5.0cm in diameter. If the pressure of the water in the large pipe is 80000Pa and the pressure in the small pipe is 60000Pa at what rate does water flow through the pipe?
  45. Colonial Times

    colonial government info. please help Please be more specific about what you need. Which time period? Which colony? If you give us more information, we'll be glad to help you.
  46. please check my answer med reimbursement

    Please recheck my answer thanks The Americian Associaton of Labor Legislationimplemented fee schedules True or False I said True
  47. Health please check my answer

    Please check my answer thanks True or Faslse The term used to describe why medical treatment is necessary is procedure I say False
  48. I just posted chinese!!

    um, i don't think it appears really well on my monitor (is it just mine or...) if you can't see it, could you please give me your email add so that i can email it to you and you can check the mistakes? please help me...
  49. Algebra

    Please Solve: 4-x=-5 I thought the answer was -9 but that doesn't seem to be it. Can someone please help? Thanks! This is what I have: 6. 4-x=-5 The problem to solve is: 4-x=-5 Subtract 4 from both sides x = -9 Then divie by -1 Would the answer be 9? To Check: 4- - 9 = -5
  50. Earth Science

    What are two forces that cause the Earth's surface to constantly change and what are their effects on the planet? Please help I do homeschooling and I'm super behind in science please answer before 12:00 p.m. on 11-17-09
  51. PSY

    I NEED HELP ON THE NEXT WORLDS PLEASE i need the definition also please 1. Performance goals 2. Mastery goals 3. The effect of praise 4. Expectations and self-efficacy
  52. psy

    I NEED HELP ON THE NEXT WORLDS PLEASE i need the definition also please 1. Performance goals 2. Mastery goals 3. The effect of praise 4. Expectations and self-efficacy
  53. English

    Please find these sentences whether these are correct or not. If not please explain. 1.Neither of these roads----lead----to the railway station.(lead, Leads) 2.Many of these roads--were--- damaged by the earthquake.(was, were)
  54. calculus

    find linear approximations for each of the following and put a bound on the error of the estimate. 1. (7.985)^1/3 using f(x)=x^1/3 and a=8 2. (.9997)^100 using f(x)=x^100 and a=1 please help explain please too
  55. Math

    Pat paid $35 for a shirt that originally cost $50. What percent of the original price did the shirt cost? Please show working. I calculated it to be 30% but the answers provided are (a) 40% (b) 65% (c) 70% (d) 85%.........Please Help me
  56. Chemistry

    Which of the following metals would be expected to have the most unstable salts? a) sodium b) zinc c) tin d) silver Please define for me what 'unstable salts' are please?
  57. elementar

    how to prepare research graphic organizer ocean animal.which one is the best like dolhin.please help me i don,t have any idea.how to prepare that one can u please explain me
  58. Chemistry I NEED HELP! PLEASE

    How many moles of Hydrochloric acid are needed to dissolve 39.0 grams of aluminum Hydroxide? I just need to write out the equation but I was out and don't know how PLEASE HELP!
  59. alGEBRA 2 help please would appreciate

    for the equation -4x-8y^2=0,give the focus and directrix.then sketch the graph, showing both the focus and the directrix. please show all the step thank you.
  60. ALGEBRA 2 help please would appreciate

    for the equation -4x-8y^2=0,give the focus and directrix.then sketch the graph, showing both the focus and the directrix. please show all the step thank you.
  61. math ms sue please help, PLEASE!!!!

    the jones' are planning a vacation. the total cost is $2500. they are able to save 1/5 of the cost each month. how much will they save in three months?
  62. Math

    (1) 8/1 divided (-3 2/5) My answer is 68/1 (2) 3 2/3 divided by -8 6/7 answer 682/21 3) 41/5 x -8/5 =32/25 Please I need help i'm so confused please show work so I can understand these other 27 problems that i have to complete. Thank you Ms. Sue
  63. Please help trig proof

    ((cotx+cscx)/(sinx+tanx))=cotxcscx Please prove left side equal to right side, only doing doing work on the left.
  64. SCIENCE HELP PLEASE

    Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*
  65. Math

    Please help me with the following by checking it. Solve for x: √(2x^2+5)=2 A. ±1 B. √2 - (This is my answer.) C. ±2 D. None of the above. I am not sure about my answer, can someone check it please. Any help will be greatly appreciated.:)
  66. algebra

    I really need that to my examples in my report tomorrow those i posted question, its a kind of test tomorrow please help me now please... even if now only...
  67. science

    I grand daughter has this fill in the blank: Electically__________ objects push or _____________ on other electrically charged objects. This produces___________. Please fill in the blanks please. Because we don't know... Thanks!!!!
  68. Math

    I HAVE NO IDEA WHAT THE ANSWERS ARE JUST PLEASE TELL ME IF THEY ARE WRONG OR RIGHT, PLEASE HELP IF YOU CAN!!!!! 1.-2v-7=-23 A.)15 B.)8*** C.)-8 D.)-15 4.-2(m-30)=-6m A.)-15 B.)-13 C.)-8*** D.)8 5.3n+2=8+2n A.)3 B.)4*** C.)5 D.)6 6.Simplify the expression. -6-7(c+10) A.)64-7c B...
  69. History

    I HAVE NO IDEA WHAT THE ANSWERS ARE JUST PLEASE TELL ME IF THEY ARE WRONG OR RIGHT, PLEASE HELP IF YOU CAN!!!!! 1.-2v-7=-23 A.)15 B.)8*** C.)-8 D.)-15 4.-2(m-30)=-6m A.)-15 B.)-13 C.)-8*** D.)8 5.3n+2=8+2n A.)3 B.)4*** C.)5 D.)6 6.Simplify the expression. -6-7(c+10) A.)64-7c B...
  70. algebra

    use intercepts to graph the line described by each equation: -6y = -4x + 24 I was told that the x intercept is 6 the y intercept is -4 Can you please explain to me how that's the answer step by step please (baby steps) Thank you
  71. math

    please help with the steps 36+9%3x5= do you multiply 3x5 first? 15 36+9=45 45%15=3 Please advise Thank you also the percent sign is supposed to be division sign
  72. Math please check answer

    please check my answer :) The monthly payment of a $100,000 mortgage at a rate of 8 1/2 % for 20 years is 8678.23
  73. Lang Arts

    I need help on this book called the outsiders if anyone has read this book please email me I really need help its on a oral presentation so Ty please help!!
  74. algebra

    Check this problem for me do I have negative sign right with the answer. -1(-1)+-5-5=-2/-10==-1/5 the one on top and the -1(-1) and on the bottom is -5-5. so check this answer for me. Please, Please
  75. algebra

    Check this problem for me do I have negative sign right with the answer. -1(-1)+-5-5=-2/-10==-1/5 the one on top and the -1(-1) and on the bottom is -5-5. so check this answer for me. Please, Please
  76. to Lulu - re English

    Please do not post a question more than once. If you have further questions, please post under the original question.
  77. To Desmond

    Please use Post a New Question -- if you piggy-back a question on another student's question, it's unlikely to be answered. Please repost your question.
  78. Math please

    The HCF of the smallest composite number and the smallest prime number is 1.is this statement is true or false.give reason.please
  79. Algebra

    Add polynomials 0.15x^4 + 0.10x^3 - 0.01x^3 + 0.01x^2 + x 1.25x^4 + 0.11x^2 + 0.01 027x^3 + 0.99 -0.35x^4 + 15x^2 - 0.03 I don't understand PLEASE PLEASE HELP!!
  80. Math - help please

    Write the equation of a line that is perpendicular to the given line and that passes through the given point. y – 3 = (x + 2); (–2, 3) A. Y+3= -3/8(X-2) B.Y-3=-3/8(X+2) C.Y-2=-3/8(X+3) D. Y+3=3/8(X-2) I am not sure how to do this problem...please help...
  81. algebra 2

    help please!! state the possible rational zeros for each function. then find all zeros. y=x^3-13x^2-x+13 show all the step please .thanks
  82. Math, Please help!

    I'm having a hard time in math, and every time I start my test my eyes glaze over. Can anyone please help me out? (9m+6)+(-5m-6) (3r^2+7r+1)+(4r^2-8r-2) (6h+1)-(9h+4) (-7w^2-2w-1)-(-5w^2 +3w-2)
  83. Math, Please help!

    I'm having a hard time in math, and every time I start my test my eyes glaze over. Can anyone please help me out? (9m+6)+(-5m-6) (3r^2+7r+1)+(4r^2-8r-2) (6h+1)-(9h+4) (-7w^2-2w-1)-(-5w^2 +3w-2)
  84. Algebra 1

    Find the y-intercept of the two coordinates ( 2, -5) and ( 6, 3). Please help me with this question and please explain to me and show me how to find Each step to solving the y- intercept. Thank you 😄
  85. As physics

    Here are some questions to complete after you have determined the wavelength with a diffraction grating. (A laser was used) equation used: n x lambda=d x sintheta Question: What effect will the following have on the pattern produced? Explain your reasoning: 1.increasing ...
  86. physics - PLEASE HELP

    A softball of mass 0.220 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 4.8 m/s. (a) Calculate the ...
  87. physics (Newton's law of gravitation)

    Can anyone please help me with this question? I am really confused. A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.78×1030 kg and the black hole has a mass of 9.94×1030 kg. What is the ...
  88. Physics

    Help!!!! Please!!! The coefficient of performance of a refrigerator is defined as the ratio of heat extracted from the refrigeration compartment to the work required to operate the refrigerator. A certain refrigerator has a coefficient of performance of 4 and requires 515 W of...
  89. Physics

    When an 81.6 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.14E+3 J. By how much does the potential energy of a 18.6 kg child increase when the child climbs a normal staircase to the second floor? I...
  90. Physics * (Wht am I doing wrng? answ provided)

    A 6 kg block slides on a horizontal frictionless surface with a speed of 1.5 m/s . It is brought momentarily to rest when it hits a bumper that compresses a spring. The acceleration of gravity is 9.8 m/s2 .How much is the spring compressed if its force constant is 7 kN/m? ...
  91. Physics

    1) A physics book is moved once around the perimeter of a table of dimensions 1 m by 3 m. What is the distance traveled? 2) A window washer drops a brush from a scaf- fold on a tall office building. What is the speed of the falling brush after 2.7 s? (Neglect drag forces.) The...
  92. Physics

    An empty rubber balloon has a mass of 0.0120 kg. The balloon is filled with helium at 0 degrees celsuis, 1 atm pressure, and a density of 0.179kg/m^3. The filled balloon has a radius of .5m a)What is the magnitude of the net force acting on the balloon? b) What is the ...
  93. Algebra

    please help me with this question. please explain this question to me and how you got the answer to the question. Solve the inequality. > 10 A. y < –16 B. y > –60 C. y > 4 D. y < –60
  94. Calculus help please

    I have to evaluate the following: tan((sin^-1)(2/7)) and sin^-1 (sin(17pi/6)) Please help.
  95. HELP!!!!EMERGENCY WITH THE POEM!!!

    do anyone knows a poem named "Instruction for Joining a New Society", which about the desire to become an American? I need this poem immediately!!! Thank you for using the Jiskha Homework Help Forum. If that is the title, I find nothing! If you have either the title or the ...
  96. physics

    at a picnic a frind asks you for advice about cooling his warm bottle of soft drink.he can submerge the bottle in a bucket of water, or wrap the bottle in a cloth and then wet it with the water from the bucket.which should he do? i think the first option is right. but i can't ...
  97. physics

    a golfer hits a golf ball an initial velocity of 54m/s [42 degrees above the horizontal]. the ball lands on an elevated green that is 14m higher that the level from which the golfer hit the ball. a) how far away horizontally from the golfer does the ball land? b) what is the ...
  98. physics

    a golfer hits a golf ball an initial velocity of 54m/s [42 degrees above the horizontal]. the ball lands on an elevated green that is 14m higher that the level from which the golfer hit the ball. a) how far away horizontally from the golfer does the ball land? b) what is the ...
  99. Math - Please Check My Answer

    Please help me with the following: Which of the following statements most accurately describes the difference between 3x^0 and (3x)^0, if a difference exists? A. There is no mathematical difference between 3x^0 and (3x)^0. The two are equivalent expressions. B. In the ...
  100. To "bad@math" (and other names)

    Please post under one name. Please do not post to demand that someone go back and answer your previous questions. A math volunteer will get to them when he/she can. Thanks.
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