physics please HELP !

130,975 results, page 20

  1. Please help me...Please....Math

    Find the coordinates by solving and graphing the equation : -x^2-x+30=0
  2. Math help please

    1. 2(3x + 5) = 46 4 5 6 7 2. 1/2x + 1/4x = 16 16 21.3 32 64 3. 6 - x - x = 18 -6 6 9 -9 4. 4x - 3/5 = 2/5 1/5 5/5 1/2 1/4 My answers: 1. 6 2. 21.3 3. ???? 4. 1/4 I have no idea how to solve 3! Can you please explain? Thank you
  3. algebra help please

    add and simplify 1. a^2/2 + 3a^2/8 2. 4c/15 + 8c/25 i need help can someone explain please
  4. math

    please help me this question. 1/a+1/b+1/c=2/1 c¡Ùb¡Ùa find a£¿b£¿c's Positive integer solution please help me thanks
  5. math

    please help me this question. 1/a+1/b+1/c=2/1 c¡Ùb¡Ùa find a£¿b£¿c's Positive integer solution please help me thanks
  6. vocabulary-suffixes

    What does the suffix mean in the word logical?Please,please help!!!!!
  7. Algebra 2

    Please help!!!! Please help me with this Graph the compound inquality on the number line. x<3 or x>6=
  8. Algebra, help please!!!

    Solve for x in each of the following: a: 2/3x = 11/6 b: 3/4 / x = 1/3 c: 5/6 - 2/3x = 3/4 d: 2x/3 + 1/4 = x/6 - 1/2 Please help me and explain, I don't get fractions at all!
  9. Algebra: PLEASE HELP ME! :(

    for the function y = f(x) what is the ordered pair for the point on the graph when x= b-2? (b - 2, f(b - 2)) (x, f(b)) (x, b-2) (b - 2, f(b))*** Please help!!! :/
  10. help please

    can someone help me in sign language if they can't please write back a reponse
  11. math

    Can you please show me how you got the answer from Tuesday please.From Lena!!!!!
  12. math PLEASE HELP

    Can someone please explain the Pythagorean Theorem to me?! I seriously don't get it.
  13. Math

    (1*10^-17) divided by (8*10^-15) in scientific notation please. Please show work
  14. Algebra

    Check my answers please 😁 6.-4-5(x+8) A) -5x - 44 B) -5x + 36 C) -x - 8************** D) -20x + 8 7. 3x+4(x-6)-3(x-7) A) 4x - 45************ B) 4x - 3 C) 10 X -3 D) 10x + 45 8. 8 + 8 < -28 A) x<-36 B)x<-20************ C) x<20 D) x<36 9. R/15>-3 A)r>...
  15. Math HELP please!

    Order the rational numbers from least to greatest: 0.42, - 1/2, 11/20, - 0.51. - 0.51, 0.42, - 1/2, 11/20 - 0.51, - 1/2, 0.42,11/20 - 1/2, - 0.51, 0.42,11/20 - 1/2, - 0.51, 11/20, 0.42 PLEASE HELP
  16. Math help please I do not understand it

    7 3/5 = ? Yards Please help me a link will be greatly appreciated
  17. Math

    solve the equation c/4 -5 =4 Please show all steps please!
  18. Math - Please help ASAP!

    Determine which ordered pair is a solution of y = 2x - 3 A. (-2, 7) B. (0, 3) C. (-4, -11) D. (5, -7)*** Please help!
  19. Physics-Kinetic energy

    A car has a kinetic energy of 4.32 * 10^5 J when traveling at a speed of 23 m/s. What is its mass? Sorry for re-post and if anyone decides to help please step by step.
  20. physics

    what happens when light moves from a material with a lower index of refraction to another material with a higher index of refraction? please sho work and thank u
  21. Physics

    Which requires more fuel- a rocket going from the earth to the moon or a rocket coming from the moon to earth? Please explain why. Thank you so much :)
  22. Physics

    Steps for drawing an acceleration time graph from a velocity time graph and vice versa?l Please give me proper steps
  23. physics

    Calculate the range of the projectile using the initial speed and angle. Use g = 9.8m/s your calculation. Initial speed is 18m/s Angle is 75 Help please !!
  24. Physics

    The temperature of a 1 m long aluminum rod is 20° C. If the temperature is increased to 70° C, what is the length of the rod? The coefficient of linear expansion for aluminum is 16 * 10^-6 /(degrees)C Please help I can not get this.
  25. Physics help please

    In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...
  26. Math College Algebra

    Find the zeros of the following USE ALL THE THREE METHODS FOR EACH NUMBER ( Factoring, Completing the Squares and Quadratic Formula) 1.f(x) =3x+5 2.g(y)=y^2-3y+2 3.s(xl= -6x^2-13x+5 Please help me I need this before 2 hours to come. Please help me hpw to do this . Please help ...
  27. maths please help me

    NOTE: before you answer this question, please be aware that there aren't meant to be any full stops after the '2' or the 'i=0'. Also the underscores '-' represent how the following number is meant to be a lower case number. The ^ represents root numbers. PLEASE HELP ME Expand ...
  28. Math 2 pLEASE HELP

    y+2/y=1/y-5 *Please solve the rational equation. Done the same way as the previous post.
  29. Information Technology.

    please could someone list 5 or more output deivces of a computer for me please.......
  30. math please help me

    Find the value of X in the equation 9(2x-18)=36 Please show your work thank you very much for your help
  31. histroy! please help!!!!!!!!!!!

    i am really confused about how to do comparison questions in history! anyone please tell me how!!!!!

    Please! It's almost my bedtime!
  33. math!!! help please?!

    what is the probability of not throwing 7 or doubles for 6 consecutives throws with a pair of dice? help please?!?!!
  34. Trig Proofs

    Please Help: please solve this proof: cosx- cosy = -2sin(x+y/2)sin(x-y/2)
  35. Algebra (please help!)

    If y varies directly as x and y is 3 when x is 8, what is the constant of the variation? I don't understand what they are asking and how to solve this. Please help if you can! Thank you so much! :)

    CAN ANYONE PLEASE HELP ME I HAVE NO CLUE WAT TO DO AND I AM SO CONFUSED HELP ANYONE PLEASE 4x-5y=-19 2x+17=y what is the solution of the system?
  37. Help please

    can someone please look at my earlier post on socials, I would like all the help i can get, thank you
  38. music

    Please help.. Can anyone please tell me who was the first author of the lyrics"Five Little Monkeys" Thank You
  39. Algebra-Please Help!!

    What is the solution of x-4 is less than 4 and x + 4 is greater than 7 Please show how you did it so I can look at it and learn how to do them in the future Thanks
  40. Math(Please help)

    Find the real solutions of each equation. 1) 1 / (x+6)^2 = 1 / (x+6) + 12 2) 8x^2/3 - 39x^1/3 - 5 = 0 I have no idea how to do these. Please help!!! Thank you!
  41. math

    please can you help me solve the following equations and please can you show your method. thanks 1) 4x+3/5x-6 = x-1/x-6 2) 4x-5/1-6x = x+10/x-6 thanks once again
  42. 8th grade

    5[6-2(5-3>to the zero power)] Please help so confused answer = -20 or 100 idk please help !
  43. marketing

    can you help me please to differentitae this follows... 1.synthetic vs. fabricating process what does it mean please i need your help
  44. grade 9 math

    Can someone please help me solve this equation. And please explain how to break this down. 4b-6+b-9= 0
  45. Calculus help me please!

    Find the value of k so that f(x)= {3x^2+kx+4 if x<0 and 2sqrt(x+4) if x >or equal to 0} is differentiable at x=0 can someone please provide help!!!
  46. prealgebra

    how do you solve this problem and can you help me please: wholesale price: $13 and markup percent: 110% can u help please
  47. Algebra I

    What is a set notation? Please explain what it is and give examples as well please. It would help a lot. Thank you.
  48. logic

    Can u please give me 2 own examples of contrariety,subcontrariety,subalternation,and,contradiction?PLEASE.
  49. algebra2 PLEASE

    what are three important thing for an evaluating and inequalities and abs. values please and thank you
  50. college algebra, Please help!!

    solve the following equation 9^x-1 = 144(6x) please show work.
  51. calculus please help

    lim y→−1 (sqrt(y^2+8)-3)/y+3 find limit if it exists please help
  52. calculus-can someone please help me with this ques

    find the rate of change of f(x)=x^2+4 a. from -2 to 0 b. from 1 to 3 c. from -2 to 1 please show work
  53. please help me please!!! Math

    Find a6 for an arithmetic sequence where a1=3x+1 and d=2x+6 . I can't even solve it because I do not have any idea.
  54. Chemistry Help Please

    Which of the following is the strongest reducing agent? a) Li+ b) Zn c) Sn d) H2 Is it Li? Can someone please explain what the answer is and why?
  55. Calculus Help Please!!!

    if f(x)= x+(1/x), find f'(x) using the limit definition of derivative. Please show steps!!! Thank you!!!
  56. math

    Please help me with this one, I am stymied! ; Does weight + height affect force? Please explain!
  57. math/help please

    Question: Kenny reads 5/8 page in 2/3 minutes. This is unit rates. Please help!
  58. Algebra 1

    Please list five numbers that have 3, 5, and 7 as prime factors. Please help answer thanks
  59. integral Calculus

    ʃ (x4 + 6x3 – x2 + 2)dx I really need it for practicing this subject...please please help
  60. history

    How is Mary McLeod Bethune a hero?Please no links and please at least 8-10 sentences.

    hi! could someone give me a well known company with direct and indirect competitors ( at least 3) please!! please help me <3
  62. Please Help

    Please help I have to do something but do not get what these words mean. Post heart rate Duration
  63. math

    Multiply 2/3 and 6/7 A. 4/7 B. 4/21 C. 12/21 D. 3/7 PLEASE HELP if you could please tell me all the answers for this mixed numbers practice if u know them
  64. Science Help Please

    Giants and dwarfs are believed to be _________ stars. a) old b) young Please help!
  65. Math

    Please help me with this riddle please! Why is a party like pouring oil into a car?
  66. math please help

    Can the numbers 24, 32, 40 be the lengths of the three sides of a right triangle? Please explain why or why not thank you.
  67. AP Chem

    Please! This is urgent! I don't know how to do this. Determine the solubility at 25°C of Cd(IO3)2 in water and in 0.20 M CdCl2. Ksp of Cd(IO 3) 2 is 2.5 × 10 –8 at 25°C. Please help!
  68. algebra

    could someone please check these roblems for me and if they are not rightWOULD YOU PLEASE HELP E WITH THE CORRECT ONES THANKS!!! 1. Slove for X, wher X is the real number, square root 5x + 9= square root 9x + 13= 27 2. Find the value: ^3 square root -27= 9 3. Write the ...

    Determine whether the solution is basic, acidic, or neutral. Write net ionic equations to show how it behaves in aqueous solutions. 1) Fe2(SO4)3 I know it is acidic Do I do hydrolysis equations for the net ionic or do I do redox reactions?
  70. Physics

    Please help me with the following problem: Joe is on a cross-country trip from New York to Los Angeles. He drives for 45.0 min at 70.0 km/h, 10.0 min at 95 km/h, and 30.0 min at 55.0 km/h, and he spends 20.0 min eating lunch and buying gas. What is the average speed for this ...
  71. speech

    Can you please help me out with a speech? I'm in 10th grade at High School and we're doing speeches soon. I'm not lazy and trying to get someone to write a speech for me but I seriously suck at speeches and have no idea what to write or talk about. Can you please write me a ...
  72. Physics

    A particle of mass m0 is given a kinetic energy equal to one-third its rest-mass energy. How fast must the particle be traveling? please include units
  73. physics

    Hi! could anyone please help me with this problem. Thank you so much. Q: The critical angle for total internal reflection for ice surrounded by air is 49.8°. Calculate the Brewster angle for ice if the light is incident from the air.
  74. college physics,electric potential

    Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square? V? Please show me how to solve this.Thanks

    A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. PLEASE SOLVE THE QUESTION WITH ANSWER AS I WAS NOT ABLE TO GET THE ANSWER
  76. Physics Need Help PLEASE

    Two point charges are separated by 8 cm. The attractive force between them is 14 N. If the two charges attracting each other have equal magnitude, what is the magnitude of each charge?
  77. Physics

    What is the speed of the wave represented by y(x, t) = A sin(kx − ωt),where k = 7.0 rad/cm and ω = 3.6 rad/s? answer should be in cm/s I tried to subtract 7-3.6= 3.4 which is wrong and I also divided 7/3.6=1.94 , but that is wrong too. I don't know how to do ...
  78. physics ..PLEASE HELP ASSIGN DUE SOON :(

    A jet airplane has an intensity of 97.7W/ m^2 when heard at a distance of 30.0m. What is the maximum sound intensity heard by a person on the ground when the airplane is 10100m overhead?
  79. Physics

    In the circuit shown, find the voltage Vx (in Volts) if V = 17.0 Volts, R1 = 13.0 k ohms, R2 = 4.0 k ohms, R3 = 13.0 k ohms and R4 = 21.0 k ohms. Answer is -6.5 I don't understand how they got it, can someone please explain it with steps? Thanks tinypic. c o m/r/2pzhcpl/8
  80. physics

    In the circuit shown, find the voltage Vx (in Volts) if V = 17.0 Volts, R1 = 13.0 k ohms, R2 = 4.0 k ohms, R3 = 13.0 k ohms and R4 = 21.0 k ohms. Answer is -6.5 I don't understand how they got it, can someone please explain it with steps? Thanks tinypic. c o m/r/2pzhcpl/8
  81. Physics

    Intensity of 4Mhz in 1.54mm = 2W/cm2 at 4cm intensity =? I know the answer is 0.32, but I do not understand why. Can you please explain? I did figure out that Attenuation= 8db. 4/2 x 4cm = 8db. Thank you in advance. I appreciate it!
  82. Physics

    Help with this please. No idea. Except for a 22.00 min. rest stop, Emily drives with a constant velocity of 89.5 km/hr north. How long does the trip take if Emily's average velocity is 77.8 km/hr north?
  83. college physics

    This site is just a front for liveperson Most college physics questions are not answered for months if ever. Out of "200 experts" you must have somebody who knows physics right? Guess not.

    Draw an arrow in the box that shows the direction of the force. Please help. I want to be sure. W > 0 W = 0 W < 0 ___ ____ ____ ___ ____ ____ d-> d-> d->
  85. physics b

    If heat Q is required to increase the temperature of a metal object from 4°C to 6°C, the amount of heat necessary to increase its temperature from 6°C to 12°C is A Q B 2 Q C 3 Q D 4Q please help me asap
  86. Physics please help !

    A Goodyear blimp typically contains 4770 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. The temperature of the helium is 274 K. What is the mass (in kg) of the helium in the blimp? You asked this twice. See my response to your later post.
  87. physics

    please someone give me a hand at this problem. . . Describe the Bohr model of the atom. What is Bohr’s key idea (involving matter waves) that makes the Bohr atom have discrete energy levels?
  88. physics

    please check my answer An electron moves north at a velocity of 9.8 * 10^4 m/s and has a magnetic force of 5.6 * 10^-18 N west exerted on it. If the magnetic field points upward, what is the magnitude of the magnetic field? F=BqV F= 5.6 * 10^-18N q= 16 * 10^-19C V= 9.8 * 10^4 ...
  89. help with physics please!

    2.50 kg particle (the function U(x) has the form bx2 and the vertical axis scale is set by Us = 2.0 J).(a) If the particle passes through the equilibrium position with a velocity of 55.0 cm/s, will it be turned back before it reaches x = 18.0 cm?(b) If yes, at what position (...
  90. college physics

    A 12100 kg railroad car travels alone on a level frictionless track with a constant speed of 20.5 m/s. A 5850 kg load, initially at rest, is dropped onto the car. What will be the car's new speed? Please help!
  91. Physics

    A point (labelled P in the figure) is attached to the rim of a disk of radius 0.2 m, which can turn around an axis through its center. It is rotating counterclockwise with a speed of 2.5 m/s. Can someone please step me through the problem step by step?
  92. physics

    Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s. PLEASE HELP!! i have tried so many different ways and can't seem to get the answer
  93. physics (please help!)

    A projectile of mass 0.539 kg is shot from a cannon. The end of the cannon’s barrel is at height 6.4 m, as shown in the figure. The initial velocity of the projectile is 9 m/s . How long does it take the projectile to hit the ground? Answer in units of s
  94. Physics(Please help)

    A skier slides horizontally along the snow for a distance of 11.9 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0458. Initially, how fast was the skier going? I do not know how to start this. Thank you.
  95. Physics - PLEASE HELP

    A 25-kg uniform ladder 10-m is leaning against a frictionless wall. The ladder is making an angle of 32° to the ground. What is the magnitude of the total force exerted on the ladder by the ground? 675 N 462 N 245 N 543 N 314 N
  96. Physics

    A particle travels along the x axis with a constant acceleration of +2.7 m/s2. At a time 4.2s following its start, it is at x = -108 m. At a time 5.7 s later it has a velocity of +13.0 m/s. Find its position at this later time. Please use kinematic equations to solve.
  97. Physics

    A 1550 kg car is traveling with a speed of 12.4 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.3 m? I found the force of the car to be 14700 by using F=ma. I am confused on what to do with the rest of the ...
  98. Physics

    A rock is thrown straight up at 22.0 m/s from a roof of a 30.0 m tall building. After rising, the rock falls on the street below. Ignoring air resistance, how much time is the rock in the air? Show the work please :)
  99. physics

    In a physics lab, students are asked to predict how the acceleration of the block sliding up a ramp compares to the acceleration down the ramp compares to the acceleration down the ramp. The block slides up a somewhat rough surface inclined at an angle of theta above the ...
  100. AP Physics

    can you please explain this to me... Were given this eqaution x = At^2 + B were A = 2.10 m/s^2 B = 2.80 m ok and this is an example problem and it's wlking us through it find the instantaneous velocity at t=t2=5.00s equlas the slope of the tangent to the curve at point P2 ...
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