physics please HELP !

130,869 results, page 69

  1. Math

    Please show me how to enter this into scientific calculator the equation is 30*0.6637 - 29*0.6223*e^(-0.05*0.137) and the answer is 1.99 i don't know how to enter the e^(-0.05*0.137) part. please show me detailed steps. my scientific calculator is fx-991w (google it if ...
  2. physics--please help

    You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...
  3. physics--please help

    You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...
  4. Physics

    A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +0.8 m/s and ax = +0.9 m/s2. The y components of the puck's initial velocity and acceleration are v0y = +2...
  5. Physics

    An arrow is fired horizontally with a speed of 30ms-1 from a height of 2m above the ground level. Model the arrow as a particle which does not experience air resistance. a)show that the time taken for the arrow to hit the ground is 0.639 seconds correct to 3.s.f b)find the ...
  6. physics please help

    A rock of mass 5kg is pushed over the edge of a cliff which is 200m high 1.ignore air resistance and calculate the speed of the rock at the bottom of the cliff. In reality air resistance cannot be ignored. The rock eventually reaches terminal velocity of 30m/s 2.calculate the ...
  7. physics! please help!!

    A particle rotates counterclockwise in a circle of radius 6.5 m with a constant angular speed of 7.4 rad/s. At t = 0, the particle has an x coordinate of 3.3 m and y > 0 . A) Determine the x coordinate of the particle at t = 0.716 s. Answer in units of m ( I know this ...
  8. physics

    Please help I cant breath with this qn, due today exam pending, thanks for taking your time to help. The human outer ear contains a more-or-less cylindrical cavity called the auditory canal that behaves like a resonant tube to aid in the hearing process. One end terminates at ...
  9. language

    i did a tercet poem. can you please tell me if its a good poem please or if there are any mistakes? thanks. The Funny Dog I saw a dog He was walking in the fog So he couldn’t see and got stuck in a log. He can jump up high So he likes to pretend he can fly Up in the big blue...
  10. Chemistry

    Please help me with this question: Calculate the theoretical yield amount of CaCl2 that would be required to change the temp of 50ml of water from room temp 20degree to 45 degrees. Heat Capacity H20 is 4.184 Jg^-1deg^-1 and density is 1g/mL. I've already calculated: Q=mc delta...
  11. physics

    A mover pushes a couch a distance of 4 m to the top of a ramp into the back of a truck using 500 N of force. A) What is the work input of the mover? B) What is the mover’s power if the task takes 10s? C) If the mass of the couch is 100 kg and the back of the truck is 1.5 m ...
  12. Health please check my answer

    Please check my answer thanks Is this statement True or False A 16 -year old patient is having problems with a swollen gland on the left side of her neck, The physican is most likely to use visualization to determine if the gland has any atypical characteristics. My answer is ...
  13. health

    should schools educate teenager about contraception methods or focus only on abstience? please help me, i think yes they should because there are many teenagers who prefer not to adopt abstience. so they should have proper knowledge about contraception. but i need two reasons ...
  14. Math. Have answer, please show work

    In a tracer method the potassium isotope 42K is used for labelling. The half life of 42K is 12.5 hours. If No is original number of atoms, how many hours will it take until only (1/1024) No Atoms remain? The answer is 125 hours but I do not know how to get this. Please help!
  15. Science: Physics and Chemistry

    Can someone please help me with this??? I was given a systems equation. Two masses are on a flat frictionless surface tied together. There is a pulley type thing and another mass is hanging over the edge of the table. It is attatched to the other 2 masses. It has no Fn, only ...
  16. physics

    Two blocks are placed at the ends of a horizontal massless board, as in the drawing. The board is kept from rotating and rests on a support that serves as an axis of rotation. The block on the right has a mass of 5.4 kg. Determine the magnitude of the angular acceleration when...
  17. physics

    REALLY NEED HELP WITH THIS PLEASE. One gram of palladium has 5.66×10^21 atoms, and each palladium atom has 46 electrons. How many electrons are contained in 7.00g of palladium? The elemental charge is1.6×10^−19C. Answer in units of electrons. The answer is 1.82252x10^...
  18. physics

    Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate would ...
  19. physics

    Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate would ...
  20. Maths

    You have seven balls labelled 1,2,…,7 and seven unlabelled, indistinguishable boxes. How many different ways can the balls be placed into the boxes? Can anyone please work the complete solution. I got the answer but it was solved by my brother and he challenged me to get the...
  21. chemistry

    can you please give me one practical application of analytical chemistry in being a medical technologist? i know it will determine the separation event happening on the lab test... but is that already a practical application? or i have to cite a deeper example? please give me ...
  22. 6th Grade Geometry Help Please

    Hi again, so when calculating a circle's dimensions, circumference and area do you use the squared symbol and for a rectangular prism's dimensions, surface area, and volume do you use the squared symbol? Please respond quickly!!! Thank You Very Much.
  23. PLEASE HELP ASAP!! Algebra

    The probability that Shania is on time for school is 1/2. Find the probability that Shania arrives on time for school for the next 5 days. Express your answer as a percent, to the nearest tenth of a percent. A. 50% B. 15.6% C. 11.4% D. 3.1% ALSO, PLEASE EXPLAIN THOROUGHLY!! ...
  24. Math(HELP PLEASE )

    Complete the given table for the equation 4x+y=9 The following given table is x y -1 13 3 5 2 -3 Roll X is missing two numbers and Roll y is missing three numbers Please someone help. I have been stuck on this question for to long and can not move on to next assignment. Thanks
  25. Math

    Due to the plate tectonics, the summit of Mount Everest moves about 4.5 X 10 ^-3 meter northeastwar in one year. About how many meters does the summit of Mount Everest move in 11 years? 4.09 x 10 ^-3 4.95 x 10 ^-3 4.09 x 10 ^-2 4.95 x 10 ^-2 Can you please check this? I got D...
  26. English

    I am trying to find a connection between Invisible man by Ralph Ellison and got tell it on the mountain by James Baldwin. The only connection I can find is that both characters are somehow betraying their race. However, in invisible man I can find that white people betray the ...
  27. Marketing Management

    What ae subway limited target group? Are you asking what the Subway sandwich company targets as its prime customers? Please clarify your question and we'll try to help you. Actually i am totally lost at what i am really looking for. This was suppose to be another person ...
  28. Macroeconomics

    Please, please help me! Make a graph in Excel and explain the following: Holding all other things constant, what would happen to the price of pineapples if the firm increase the available supply. 2. Conversely, what would happen if supply is reduce. Aside from changin the ...
  29. math word problem PLEASE HELP

    Susan uses 15 rolls of ribbon to decorate 10 wedding baskets. Each roll of ribbon is 5 3/8 yards long. After she decorates the baskets, she decides to cut off another 3/4 yard from the ribbon of each basket. Write and simplify an expression to fin out how much ribbon was used ...
  30. Social Studies - Please Check my Answer

    Please check my answer, I am not sure for this one. In 1784 the British forced American merchants to pay duties on a. trade goods imported from the British West Indies. - (This is my answer.) b. trade goods imported through Canadian ports. c. British goods sold in America. d. ...
  31. Re: PHYSICS

    "Relative" is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring has negligible mass and...
  32. Please tell me if i did this correct

    Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25 This is what I got: Mean = 59.19 Variance = 1.43 Standard Deviation = 2.05
  33. chemistry

    Treatment with sodium borohydride converts aldosterone A in to an optically inactive alditol. Ruff degradation of A from B, whose alditol is optically inactive. Ruff degradation of B from D - glycerol dehydration. Identify A and B. Please help urgently. Please!!!!!
  34. Chemistry DRBOB HELP ME PLEASE

    Please help me N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) + 3/2O2(g) + 1/2H2(g) --> HNO3(l) delta H° = -174.0 kJ Calculate delta H° for the reaction 2N2O5(g) --> 2N2(g) + 5O2(g)
  35. Chemistry DRBOB HELP ME PLEASE

    Please help me N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) + 3/2O2(g) + 1/2H2(g) --> HNO3(l) delta H° = -174.0 kJ Calculate delta H° for the reaction 2N2O5(g) --> 2N2(g) + 5O2(g)
  36. Math - Could Someone Check My Work?

    Could someone check my work please? Thank you! (14a^2b)(2ab^2c) = 28a^3b^3c (a^25)^7 = a^125 6x^6 ∙ 6x^6 = 36^12 (2x^2)^3 = 8x^6 (-2)0 = 1 30x^20/(6x^9 = 5x^11 4x^5 ∙ 6x^6 = 24x^11 (2x^4)^3 = 8x^12 -4^2 = -16 -(193)^0 = -1 (-193)0 = 1 (-5)2 = 25 ((6x^7)/(2x^2 ))^2...
  37. math

    Please check my answers! Simplify the product. 7x(x+4) A. 7x^2+4 B. 7x^2+28x <<<< C. 8x+4 D. 8x+11 Simplify the product. 4x (2x^3 - 7x^2 + x) A. 8x^4-28^3+4x^2 <<<<< B. 16x^4-7x^2+4x C. 8x^4-7x^2+x D. 16x^4-3x^3+4x^2 I just started learning about ...
  38. Math

    Elizabeth has 1 7/10 as many as Rosalie has in her garden. If Elizabeth has 51 plants how many plants does Rosalie have in her garden? Please explain step by step on how you answered this and also no links or anything please just a raw answer thanks in advance :).
  39. s.s (the middle ages) Grade 7

    i have 10 words and 11 definitions for them. i have only left 3 words and 4 definitions and tommorow i have a test please help me! Words: manor, pilgrim and vassal definitions: a) a persone who travels to a holy b) lesser nobles c) faithfulness d)an estate owned by a noble ...
  40. physics please help!!

    A moving 2.20kg block collides with a horizontal spring whose spring constant is 419 N/m. The block compresses the spring a maximum distance of 9.00cm from its rest postion. The coefficient of kinetic friction between the block and the horizontal surface is 0.140. a) What is ...
  41. Physics

    A U-shaped tube is filled mostly with water, but some vegetable oil has been added to both sides of the U tube. On the right side of the tube, the depth of oil is 5.00 cm . On the left side of the tube, the depth of the oil is 2.30cm . The density of the water is 1x10^3 kg/m^3...
  42. physics

    1. consider a satellite with a period of 8 hours. if the radius of the satellite's orbit is doubled, what is the period for this satellite's. 2.what is the minimum amount of heat ( in joules) needed to heat 5.0kg (5 liters) of liquid water from it frezing point to its boiling ...
  43. physics

    (a) calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) *climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min) * (b) calculate the gain in gravitational potential energy for a 50-kg person if each step 0.18m ...
  44. physics

    a +35x10^-6 C point charge is placed 32 cm from an identical +32x10^-6 C charge. how much work would be required to move a +50.0x10^-6 C test charge from a point midway between them to a point 12 cm closer to either of the charges? please show work and explain. i still don't ...
  45. Physics--check answers please

    1. Resolve an acceleration vector of 40m/s^2 [25 degrees E of S] into its components For this I got 17 as my x component and 36 as my y component 2. A player is positioned 35m [40 degrees W of S] of the net. He shoots a puoock 25m [E] to a teammate. What second displacement ...
  46. physics

    A 4.74 kg spherical ball with radius 1.4 cm rolls on a track with a loop of radius 39 cm that sits on a table 1.2 meters above the ground. The last 1 meter section of the track is horzontal and is not connected to the rest of the track. 0.33 meters of this section of the track...
  47. physics

    A rocket engine uses fuel and oxidizer in a reaction that produces gas particles having a velocity of 1380 ms-1. The desired thrust is to be 195000 N. 1-What must be the fuel/oxidizer consumption rate (in kg s-1)? 2-f the initial weight of the rocket is 125000 N, what is its ...
  48. PHYSICS (please help)

    Three masses are connected by a string. M1 = 1.0kg M2 = 2.0kg M3 = 3.0kg Mass one and two are on a table while mass three hangs off the edge of the table (there is a pulley). Find the tension in the string connecting m1 and m2. Assume the table is frictionless and the masses ...
  49. physics

    Please see if I am doing this problem right. A mixture of gasoline vapor and air is placed in an engine cylinder. The piston has an area of 7.4 X 10^-3 m^2 and is displaced inward by 7.2 X 10^-2 M. If 9.5 X 10^5 Pa of pressure is placed on the piston, how much work is done ...
  50. English

    Writeacher, could you please check my post, I need to prepare for tomorrow? Thank you!! Could you please check these phrasal verbs i'm unsure of? thank you. 1) They are cutting off the water/gas supply tomorrow. The chairman cut him out of the discussion. 2) The light went off...
  51. Physics

    We can reasonably model a 75 W incandescent light bulb as a sphere 6.0 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to non-visible light infrared radiation. (a) What is the visible light intensity (in W/m^2) at the surface...
  52. Physics. Please help

    A 3.00 kHz tone is being produced by a speaker with a diameter of 0.175 m. The air temperature changes from 0 to 29°C. Assuming air to be an ideal gas, find the change in the diffraction angle My solution v directly proportional to sqrt T v = sqrt 302 =17.382 lambda = v/f = ...
  53. Please physics help

    A 0.0124-kg bullet is fired straight up at a falling wooden block that has a mass of 3.96 kg. The bullet has a speed of 756 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t when the collision...
  54. Physics

    A 0.142 kg remote control 24.0 cm long rests on a table, as shown in the figure(Figure 1) , with a length L overhanging its edge. To operate the power button on this remote requires a force of 0.355 N . How far can the remote control extend beyond the edge of the table and ...
  55. Physics

    A flat (unbanked) curve on a highway has a radius of 200 m. A car rounds the curve at a speed of 26.0 m/s. What is the minimum coefficient of friction that will prevent sliding? Our professor didn't even go over this, and it is way more complex than anything in the book. Plus...
  56. Physics waves- help please

    A police officer with good ears hears an approaching motorcycle. The engine sound he eats as the bike approached is 195 Hz. a) Is the actual sound the bike makes higher or lower in pitch? b) After the bike passes he hears 147 Hz as the perceived pitch. If it was a nice 20 ...
  57. Physics

    In one of your rigorous workout sessions, you lost 140 g of water through evaporation. Assume that the amount of work done by your body was 3.8 105 J and that the heat required to evaporate the water came from your body. (a) Find the loss in internal energy of your body (due ...
  58. Physics, 4 short questions

    VERY IMPORTANT FOR AN ESSAY ASSIGNMENT. PLEASE HELP ASAP! THANK U VERYYYYY MUCH! 1. What force is needed to give a mass of 25 kg an acceleration of 20m/s squared? 2. A force of 6N acts upon a 2-kg mass. What is the acceleration of the masS? 3. It takes a force of 50N to give a...
  59. Physics

    In a physics experiment with an inclined air track, what do you predict about the following: a) Position graph b) Velocity c) Acceleration My ans: For a i predicted there would be a curve and i didn't know why b) velocity will decrease with time but why? c) acceleration is 0 m...
  60. Physics

    solve physics question. a train moves 3.6km from rest to rest in 3minutes. the greatest speed is 90km/h, and the acceleration and retardation are uniform. find the distance travelled at full speed.
  61. Physics

    In our physics class we launched a rocket up into the air. We measured the time it took to go up to the point it reached the ground once again. How do I find the maximum height the rocket reached?
  62. Physics

    PHYSICS HELP PLS!!How does the equation of a displacement v. speed graph (cart moving down an incline through a speed gate) relate to the work-energy principle. Pls answer asap! Thanks!
  63. Algebra/ please help!!!!

    WAGE---$ 17.00-an hour---------ANUALLY---28,285.28 APARTMENT VALUE 17.34hrs/pay period towards an apartment value of $934/month----ANUALLY---$11,208----TOTAL-------$39,493.28. My question is: first of all, I get, 17X40= $2,720-not 28,285.28, above. ALSO, I am trying to break ...
  64. Algebra

    If anyone could please just look these over: The given measures are the perimeters of squares. Find (a) the length of a side and (b) the area of the square. Perimeters: 1.) 20 cm 2.) 100mm 3.) 4ft 4.) 2in 5.) 2.8m My answers: 1.) a- 5cm b- 25cm squared 2.) a- 25 mm b- 625mm ...
  65. Math

    Please match each number with its best example. Some values will need to be changed into a decimal format. A. Recurring Decimal B. Mixed Number C. Non-repeating Decimal D. Finite Decimal E. Decimal Examples: ½ 5½ π 0.375 ⅓ I think 5½ is B and ⅓ is A, but I ...
  66. Math

    Please match each number with its best example. Some values will need to be changed into a decimal format. A. Recurring Decimal B. Mixed Number C. Non-repeating Decimal D. Finite Decimal E. Decimal Examples: ½ 5½ π 0.375 ⅓ I think 5½ is B and ⅓ is A, but I ...

    An ice chest at a beach party contains 12 cans of soda at 2.69 °C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C°). Someone adds a 6.05-kg watermelon at 24.1 °C to the chest. The specific heat capacity of watermelon is nearly the same ...
  68. spanish

    can someone please help me with this question, i'm a little unsure "Que hay en la pared de tu sala de clases?" "Hay _____." a. un mapa y un reloj b. un reloj y un capitulo c. un armario y una pagina d. unj mapa y una oficina just explain what the question is asking please. ...
  69. grade 9 mathimathic optimizing

    i am lost completly i don't know what to do. please help me!!!! a farmer is adding a rectangle corral to the side of a barn. the barn will form one side og the rectangle . the farmer has 16 m of fencing to use. conduct an investigation to determine the dimension of the corral ...
  70. math

    Can someone please help me with these problems?Out of 35 problems these are the ones I can not figure out.Please show all of the stepswith no shortcuts. I am sincerely trying to learn this stuff.Thanks 4y-2+y+36=7y+40-5y 5.3x-5.36=4.24-6.7x 6(x+4)=8(x-2) In a triangle ABC, ...
  71. math

    tom takes 3days to do a piece of work while jerry takes only one day for the same. together, they both can finish the job in 15 days. in how many days tom will finish the work? #please give it, the complete solution. please hurry
  72. physics

    in low temperature physics,at joule thomson effect hydrogen does not show cooling effect at room temperature why?
  73. Physics

    Physics :adaobi walked 2km due west and then 2km due south. Calculate the displacement of the girl.
  74. Physics (please help!!!!)

    A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.00-m^3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator ...
  75. Physics (please help!!!!)

    A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.00-m^3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator ...
  76. Physics...Equilibrium (physics of a clothesline)

    A clothesline is attached to two fixed ends which are 10.0m apart. A pulley of mass 40.0kg hangs freely in the middle of the line. The sag at the centre is 0.20m. Find the tension in each half of the clothesline.
  77. Physics - Electric force, field, and potential

    A 2μC charge is positioned at x = -0.8m and another 2μC charge is positioned at x = 0.8m. A positive test charge of q = 1.28*10^-18C is positioned at the origin x = 0m. Find (a) the electric force exerted on q, (b) the electric field at the origin, and (c) the electric ...
  78. Physics please help ASAP!

    If you know the mass of a star and a planet’s radius and speed at perihelion (closest approach to the star), then using conservation of energy and angular momentum you can solve for the radius and speed of that planet at aphelion (farthest point from the star). Encke’s ...
  79. physics

    a race car completes 10 laps around an oval track. which of the following pairs of quantities concerning its motion would both have values of zero? a)displacement, avg velocity B)avg speed, avg acceleration c)distance, avg speed d)avg speed, avg velocity e) displacement, avg ...
  80. Algebra

    Please help me solve this problem the kinetic energy (k) energy of a moving object with varies jointy with it mass (m) and the squareo of its velocity (v). If an object has an mass of 22.5 kilograms and moving with a velocity of 20 meters per secomd has a kinetic energy energy...
  81. physics

    an 6lb object is hanging from a 10lb object which in turn is hanging from a ceiling. need to find tension(T1) of rope from ceiling to 10lb object and tension(T2) from the 10lb object to the 6lb object. please, need assitance in trying to set up the problem. thanks Tension is a...
  82. physics

    I keep geting this question wrong and cant figure out what i am doing wrong. Help please. When you push a 1.75- book resting on a tabletop, it takes 2.23 to start the book sliding. Once it is sliding, however, it takes only 1.45 to keep the book moving with constant speed. ...
  83. PHYSICS Urgent help please

    A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below? B) If a black ball is dropped off the edge of the same building, how many seconds after the release of the red ...
  84. science

    2. Compare and contrast deductive reasoning and inductive reasoning. Based on the information given here, answer the following questions about the experiment: • What are the qualities of deductive reasoning? • What are the qualities of inductive reasoning? • Throughout ...
  85. electric field

    4 charged particles are at the cornedrs of a square of side a as shown. a) determine the magnitude and direction of the electric field at the location of charge q b) what is the total electric force exerted on q? basically picture is like this below It's a square with 4 ...
  86. college physics

    A 915 kg two-stage rocket is traveling at a speed of 5.50×10^3 m/s with respect to Earth when a pre-designed explosion separates the rocket into two sections of equal mass that then move at a speed of 4.00×10^3 m/s relative to each other along the original line of motion. ...
  87. Physics

    In a cathode ray tube, a beam of electrons is injected horizontally into the exact center of the parallel-plate region. Here L = 3.0 cm and d = 0.20 cm. The top plate has a surface charge density of σ0 = +0.15 μC / m2, and the bottom plate has a surface charge ...
  88. physics help please

    Considerable scientific work is currently underway to determine whether weak oscillating magnetic fields such as those found near outdoor power lines can affect human health. One study indicated that a magnetic field of magnitude 1.0 10-3 T, oscillating at 60 Hz, might ...
  89. Physics

    Two masses m are attached to two vertices of an equilateral triangle made of three massless rods of length l. A pivot is located at the third vertex, and the triangle is free to swing back and forth in a vertical plane. If it is initially released from rest when one of the ...
  90. Algebra-please check

    Could someone please check my solution-Thank you-DRWLS helped me set it up and I solved it, I think From the top of a mountain 150 feet high, Jessie stands at the safety rail on the edge and looks below. The angle of elevation from his bike on the ground to Jessie is 38 ...
  91. physics

    A space station shaped like a giant wheel has a radius of 1.00 x 10^2 m and a moment of inertia of 5.00 x 10^8 kgm^2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1.0g. When 120 people move to the center ...
  92. physics (Simple harmonic motion)

    In a horizontal block-spring system,the block mass is m=0.5kg and the spring constant is k =2N/m. At t1=0.1s the block velocity is +0.263m/s and the acceleration is -0.216m/s2. Assuming that the system is undergoing SHM.Write the expression for block displacement from ...
  93. physics

    NEEDS HELP PLEASE!! A 100kg shot putter is putting a shot 4kg. Just before he releases the shot, he is in the air (feet are off the ground). At this instant, the only force he exerts against the shot is an 800N horizontal force directed forward. a-what is his horizontal ...
  94. Sociology

    Please help me on this question. I am very stuck! 1. Prepare a chart which compares the basic characteristics of the pure capitalist and pure socialist economic models. Please help me; compare characteristics of pure capitalist and pure socialist. Thanks
  95. Social Studies help please!!

    Explain why polk was able to win the presidency. What did he campaign in support of? I mean i did the first question the explain how he was able to win the presidency but i don't understand the second question? Can someone help me please?
  96. Government

    I am working on a test review for Gov't and I cant find any information whatsoever in the text book. The question is... Identify and explain why the following is important... 2. Events leading to the American Revolution: French & Indian War, Albany Plan, Stamp Act Congress, ...
  97. please help math

    $9500 is​ invested, part of it at 12​% and part of it at 7​%. For a certain​ year, the total yield is ​$960.00. How much was invested at each​ rate? PLEASE HELP
  98. Physics help please!

    The engine has an efficiency e1. The engine takes input heat Qh from a hot reservoir and delivers work W1. The heat rejected by this engine is used as input heat for a second engine, which has an efficiency e2 and delivers work W2. The overall efficiency of the two-engine ...
  99. Please check-Reiny

    Could you check these two problems? 3sqrt (y+2) = 3 is y = 25 Answers were: true or false I said true because I did it like this Square both sides=y + 2 = 3^3 y+2 = 27 y = 25 and sqrt (2y-6) = 3-y for y answes are: no solution 5 3,5 3 I said 3 because I did it like this: 8y -...
  100. Math-PLEASE help!!

    An executive committee of three is selected from a group of ten. Which expression best describes the number of combinations? These are my choices. I have to have one of these as the answer. I am stuck. My answer was B. 10!, but I am still not sure. Can anyone help me please? A...
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