physics please HELP !

74,755 results, page 67
  1. Physics

    What hanging mass will stretch a 1.9-m-long, 0.54mm - diameter steel wire by 1.2mm ?
  2. physics

    An object experiences an impulse, moves and attains a momentum of 200 kg m/s. If its mass is 50 kg, what is its velocity?
  3. pure maths, agriculture,life sciences, physics

    i want to know what does those subject i choose fall under which career
  4. Physics

    explain the concept of electric potential difference in terms of work done in transferring the charge
  5. physics

    state the energy hans-formation which occurs when a car is brought to rest by its break
  6. Physics

    A ball falling from rest is located 45 m below its starting point 3.0 s later. Assuming that its acceleration is uniform, what is its value?
  7. physics

    a guy throws a ball up and catches it 3.5 seconds later. what is the max height and initial velocity. Please help!
  8. physics

    C1=3.00uF and Vab = 120V. The charge on capacitor C1 is 150 uC. Calculate the voltage across the other two capacitors.
  9. physics

    suppose you apply 3 newtons of force to slide a box 2 meters in 6 seconds, how much work did you do?
  10. Physics

    A spherical piece of metal has a radius of .250m and a mass of 503 kg. what is its specific gravity?
  11. physics

    A ball is thrown vertically upward with a velocity of 100m/s.It will reach the ground after hw many sec?
  12. physics

    A bus is moving at a speed of 20m/s beyond to slow at a constant rate of 3m/s each second find how far it goes before stopping
  13. physics

    What is the period and frequency of a 10-pound weight oscillating (as a pendulum) on a 5-meter-long rope?
  14. Physics

    How long would it take for a beam of light to travel around the earth in an ideal fiber-optic cable?
  15. Physics

    Two objects are near a bar magnet. One is about 1 cm away, while the other is 6 cm away. Compare and contrast the magnetic force that affects each object. What do they want me to do?
  16. Physics

    what is the purpose of the double bell jars that surround the international prototype of the kilogram in Paris?
  17. physics

    a 10,000hg car rounds a curve of radius 1200ft at 50mph what is its centripetal acceleration?
  18. physics

    Explain how an object can orbit a planet & why astronauts float around in the orbiting space shuttle
  19. physics

    find the mass of the moon if its radius is 1.76*1000000 m and the average density is 4*1000kg/m cube
  20. Physics

    Find the pressure exerted by a waterbed with dimensions of 2m x 2m which is 30 cm thick. (hint:use density of water)
  21. Re: Physics/Math

    A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the
  22. physics - drwls?

    The flywheel of a steam engine runs with a constant angular speed of 250 rev/min. When steam is shut off, the friction of the bearings stops the wheel in 2.1 h. At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the
  23. Physics

    Trying to beat the heat of summer, a physics grad student went to the local toy store and purchased a child's plastic swimming pool. Upon returning home, he filled it with 154 liters of water at 25°C. Realizing that the water would probably not be cool
  24. 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?
  25. Physics

    This is a question related to work. Today we had a pop quiz in my physics class and I am just trying to check my work here :D 1) if there is a 5 kg block on a horizontal table connected with string to a 3 kg block hanging off the side of the table through
  26. Physics

    Just before your mountain bike ride, you eat a 240 Calorie exercise bar. (You can find the conversion between food Calories and Joules in the People’s Physics chapter and several references online.) The carbon bonds in the food are broken down in your
  27. Physics

    we are doing a really dumb websearch in my Physics class on roller coasters and I really need help with like 5 problems! For the websearch I need to cite it so if you could provide any answers I also need the website! thanks in advance!!! Q's 8. If you
  28. physics bob

    still i cant find the normal force without mass of automabile. is normal force mass times gravity sin theta? on a level road the stopping distance for an automobile is 35.0m for an initail speed of 90 km/hr what is the stopping distance of the same
  29. Physics

    Once a favorite playground sport, dodgeball is becoming increasingly popular among adults of all ages who want to stay in shape and who even form organized leagues. Gutball is a less popular variant of dodgeball in which players are allowed to bring their
  30. Physics .. hard problem

    An overly eager physics student wants to confirm that the acceleration of gravity is ag=9.8 m/s^2. To check this, the student steps off the roof of the Sears Tower (height at the sky deck 427m). The rocketeer (who arrived five seconds after the student
  31. Physics(Please respond)

    A system does 210 J of work on its environment and gains 80.6 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment. Physics(Please respond) - Elena, Thursday, June 21, 2012 at 2:33am ÄU = Q - W Where
  32. physics multiplying vectors

    n the product F = qv · B , take q = 4, = 2.0i + 4.0j + 6.0k and = 136i -176j + 72k. What then is in unit-vector notation if Bx = By? ~~may i get some assistance in this problem? so far.. i tried this.. 136i-176j+72k = 4(2.0i+4.0j+6.0k)(B) 136i-176j+72k =
  33. Physics

    Physics Homework _____________________________________________________________ 1.) A particle at t 1 = -2.0 s is at x 1 = 3.4 cm and at t 2 = 4.5 s is at x2 = 8.5 cm. What is its average velocity? Can you calculate its average speed from this data?
  34. Physics- Mastering Physics

    Predict how the range of the projectile will change when you change the angle from 45∘, keeping the speed constant. A The range increases with increase in angle and decreases with decrease in angle. B It increases with either an increase or decrease
  35. physics

    if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
  36. physics

    Charge polarization is normally produced by: nuclear interactions. contact. induction. friction. electrostatic means.
  37. physics

    What amount of energy is used if 800 C of charge passing through a load with a potential difference of 120 v? answer is 9.6e+4
  38. Physics

    Satellites A and B are in circular orbits, with A two and a half times as far from earth's center as B. How do their orbital periods compare?
  39. physics

    please give a me a nice topic for my investigatory project. hope the materials also are easy to gather. thanks alot
  40. physics

    The pulley is light and frictionless. Find the mass M1, given that M2 (7.00 kg) is moving downwards and accelerates downwards at 3.01 m/s2, that θ is 15.0°, and that μk is 0.270.
  41. question

    is it better to take physics or chemistry if taking both whats better to take 1st in sophomore year better to take ap statistics or precalculas for becoming an architect
  42. physics

    wonder waves in shallow yellow disc are 6.0 cm long. at one point, the water oscillates up and down at a rate of 4.8 of oscillations per second
  43. Physics

    Two point charges that have charge values of 4.0 X 10^-6 C and -8.0 X 10^-6 C, respectively, are separated by 2.4 X 10^-2 m. What is the mutual force between them, given that kC = 8.99 X 10^9 Nm^2/C^2? I got the Felectric as -5.0 X 10^2 N, but I'm not sure
  44. physics

    A cube of ice, 28 cm on each side, is melted into a measuring cup. What is the volume of the liquid water? ------cm3
  45. Physics

    As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57 m's (128 mph) in just 3.5 s.
  46. Physics

    In terms of Ohms Law (V=IR), when plotting a graph of V against I, is it safe to say that the line passes through the origin, even though 0/0 does not exist?
  47. physics 112

    what is meant by a change in temp of 1 degree celcius on the scale of a platinum resistance thermometer
  48. physics

    What is the weight in newtons of a 250 g package of cereal? need answer and work shown asap! plz and thank u!
  49. physics

    How many excess electrons are there in a typical lightning bolt that has about 16 C of charge? Answer 1 x 1020 1 x 1019 10 1 x 1016
  50. physics

    What is the gravitational potential energy of a 300.0 g coffee cup sitting on a table top 1.25 m above the floor?
  51. physics

    a particles is moving in the circle of the daimeter 5 cm. calculate the distance coverd and the displacement when it covers 3 revolution
  52. Integrated Physics and Chemistry

    A furnace is used to heat ___ A)water B)air C)a refrigerant D)radiant coils
  53. physics

    A red flower seen in the light of mercury vapour lamp through a green filter wil appear in what colour?
  54. physics

    How much current is drawn by a television with a resistance of 21 that is connected across a potential difference of 120 V? 5.45A wasn't right
  55. physics

    harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that they have been in different?
  56. physics

    In the figure below, the bar is 2.4 meters long and has a mass of 145 kg. To the nearest newton what is the tension in the wire?
  57. physics

    you chop 50 g of ice at 0 degrees celsius into 200g of water at 40 degress celcius. What is the final temperature?
  58. physics

    A cylindrical glass is 15cm long its diameter is 7cm. what volume of milk can be poured in it without spilling
  59. Physics

    An object is executing circular orbits of radius 0.5 m. If it completes an orbit every 3 seconds, what is its tangential speed?
  60. Physics

    How far will a car travel if it starts from rest and experiences an acceleration of magnitude 3.75m/2^2 forward for 5.65 s? Answer is 59.9m
  61. Physics

    An FM radio station of frequency 107.7MHz puts out a signal of 50,000W. How many photons/s are emitted?
  62. Physics

    Intravenous infusions are often made under gravity. At what height should the bottle be placed so the liquid pressure is 700 mm-H2O?
  63. physics

    A football is kicked with a velocity of 31 m/s at an angle of 41. What is the ball's acceleration in the vertical direction as it flies through the air?
  64. PHYSICS

    What's the total mechanical energy of a 300kg satellite in circular orbit 1400km above Earth's surface?
  65. physics

    a body projected with velocity 30m/s an angle 30¡ã with horizontal maximum height attained by he object is.........?
  66. physics

    an ant walk 1 meter west and then 3 meters north whats is the ants direction in degrees
  67. Physics

    A bolt requires tightening to a torque of 98 N-m. If a wrench is 28 cm long, what perpendicular force should be applied at its end?
  68. Physics

    Moment of inertia of a 'non-uniform' ring of mass M and radius R about axis through centre and normal to its plane is
  69. grade 9 physics

    A runner jogs 12km North then turns and runs 16km East three hours
  70. physics

    if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
  71. Physics

    Why do some cooks put ice in the pot to cook meat? Explain then prove your answer by solution.
  72. physics

    A 25HP electric motor turning a 1800 RPM will produce how many foot pounds of torque?
  73. physics

    radius of the earth = 6.37 × 10^6 what is the speed of a 90.6 kg person at the equator? I know that F=m(v^2/r) but I don't know the force. Is there another equation that I'm missing or I'm using the wrong one? Thanks
  74. physics

    If a 1500 kg car stopped from an in 5.6 seconds with an applied force of 5000 N, how fast was it initially traveling?
  75. physics

    A body thrown vertically up from the ground passes the height 10.2m twice at an interval of 10 sec. Its initial velocity was (g = 10 m/s2)
  76. physics

    what force is being applied to a meteor with a mass of 500 kg as it travels at a constant velocity of 5000 meters per second?
  77. Physics Help!

    Find the total kinetic energy content of 1.55 moles of an ideal gas at temperature 435 K
  78. physics

    A 71.1 kg man steps out a window and falls (from rest) 1.24 m to a sidewalk. What is his speed just before his feet strike the pavement?
  79. Physics

    How many calories are absorbed by a copper spoon with a mass of 200 grams as it changes from 28°C to 33°C? A) 0.00027 B) 3 C) 90 D) 13,000 And this one. How do i solve this one?
  80. Physics

    What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm.
  81. Physics

    Which object produces energy in the form of light? A Venus B the sun C the moon*** D Halley’s comet I think it is C, but I'm not sure!
  82. physics

    A battery with an emf of 14.5 V and internal resistance of 0.83 Ω is connected across a load resistor R. If the current in the circuit is 0.81 A, what is the value of R?
  83. Physics - waves

    What is the source of wave motion? I would think it would be an object such as a rock dropping in the water. How this translates into an answer, however, I'm not sure. :-)
  84. physics

    if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
  85. physics

    a car starts from rest and has a constant acceleration of 2.5 m/s^2. if it travels 25m how long will it take to complete the motion
  86. physics

    a .105 kg hockey puck moving at 48 m/s is caught by a 75 kg goalie at rest. With what speed does the slide on the ice?
  87. physics

    A longjumper running at 12 m/s and jumps at 20 degrees. No wind or resistance but gravity is normal -9.81 m/s2. How far will person jump?
  88. Physics Help

    What is the energy stored in the inductor shown in the figure after the switch has been closed for a very long time? Take V = 15 V, R = 600 §Ù and L = 10 mH.
  89. physics

    1) How many seconds does it take a car traveling 40 mph, decelerating at a rate of 7 miles per second, to come to a complete stop? 2) How many feet?
  90. TVTC

    Physics...a diver of mass m drops from a board of 10m above water surface. find his speed at 5m
  91. Physics

    Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characeristic radiation characteristics?
  92. physics

    A positive and a negative charge, each of magnitude 1.7 10-5 C, are separated by a distance of 11 cm. Find the force on each of the particles. what formula do i use?
  93. Physics

    Prove that tanø is equal to U(k) when the block slides down the incline with a constant speed. (Use symbols, not numbers.)
  94. physics

    I need to make a holder for a raw egg out of straws so when it is dropped from 8 feet. it will not break I need design ideas.
  95. Physics

    mike is skiing downhill at a 25 degree angle. if his weight is 350N assuming there is no friction what is his acceleration
  96. Physics

    a man walks 10km towards west and then 15 km towards south. Find the resultant vectors, magnitude and direction.
  97. physics

    an ant walk 1 meter west and then 3 meters north whats is the ants direction in degrees
  98. Physics

    A block weighing 9.7 N requires a force of 2.6 N to push it along at constant velocity. What is the coefficient of friction for the surface?
  99. 10th grade

    how can i make an easy working model in physics for class 10 holiday home work
  100. algebra based physics

    Two protons in a nucleus are separated by 8.0×10−15m . What's the potential energy of the pair?