physics please HELP !

74,641 results, page 73

  1. physics

    at what angle with respect to the horizontal should the shot put be launched if the starting height is 2.0m to have the greatest range?
  2. physics

    A car's maximum acceleration on a dry road is 10 m/s2. What speed should it have to be able to make a turn with a radius of 47 meters?
  3. physics

    Find the angular speed of the Earth as it spins about its axis. Give your result in rad/ses
  4. Physics-Could someone please help me?

    Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object
  5. physics

    A 0.150-kg ball, moving in the positive direction at 12 m/s, is acted on by the impulse of 4N*s what is the balls final velocity
  6. Physics

    Two objects attract each other gravitationally with a force of 2.7×10−10 when they are 0.65 apart. Their total mass is 4.4 Find their individual masses.
  7. physics

    How do you draw a force diagram for an object that is tied to a pole and is moving in a constant circular direction?
  8. physics

    when you do work to push an object horizonatally on a frictionless surface what energey change is taking place?
  9. physics

    Mitch carries a large cat from one end of his bedroom to the other.does he do any work?if not why? if so,what energy change is occurring?
  10. Physics

    A grenade is thrown up into the air with an initial velocity of 27 m/s. How long does it take to return to the thrower's hand? I got 5.4 s, but I am very unsure.
  11. physics

    express the answer in scientific notation with the correct number of significant figures (8.86+1.0*10^-3) / 3.610*10^-3 2454.57??? please help
  12. physics

    Why do many musicians wear earplugs during their performances even though the intensity of the sounds produced is lower than the threshold of pain?
  13. Physics

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

    What is the total internal kinetic energy of 16.2 moles of a monatomic ideal gas at a temperature of 279 K? KE =
  15. physics

    How much elastic potential energy is stored if a 5kg object is suspended from a whose spring constant is 100N/m
  16. Physics

    What mass must be added to 0.9kg trolly to give it an,acceleration of0.4m² when a 0.6n force is applied to it?
  17. Physics

    You drill a well to a depth of 100-m. Find the difference in water pressure, comparing the top and bottom of the well
  18. physics

    a box is thrown upwards with a velocity of 8m/s and takes 2seconds to reach its maximum height.how high does it go up
  19. physics

    Determine the magnitude of the force of gravity acting on a 340 kg satellite, 850 km above Earth's surface
  20. Physics

    A proton with a kinetic energy of 4.7×10−16J moves perpendicular to a magnetic field of 0.25T .
  21. Physics

    The voltage across a lamp is (6.0 +_ 0.1) V and the current flowing through it is (4.0 +_ 0.2) A. Find the power consumed with maximum permissible error in it?
  22. Physics

    From what height would a car weighing 9990 N have to fall to gain the kinetic energy equivalent to what it would have when traveling 64.87 mi/hr?
  23. physics

    how can i plan and design a lab to investigate how electric current causes contraction of a spiral wire spring
  24. Physics

    Two objects attract each other gravitationally with a force of 2.3×10−10 when they are 0.21 apart. Their total mass is 4.50 . Find their individual masses.
  25. Physics

    Calculate the heat energy needed to change the temperature of 2 kg of copper from 10°C to 110°C. I forgot the formula
  26. Physics

    A person is jogging at 3.5 m/s and grabs a rope that is hanging vertically from a tree. How high can the student swing?
  27. physics

    A copper wire has a diameter of 1.532 mm. What magnitude current flows when the drift velocity is 0.500 mm/s?
  28. 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
  29. physics

    5. A bomber is flying at a height of 9 km at 800 km/h. How far in front of the target should he drop his bombs? show formulas*
  30. Physics

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

    toward what direction, north or south would you look to the sun at noon on june 21-22 if you lived at the following latitudes
  32. physics

    if a ball is thrown vertically upward and is caught 5 seconds,how fast must have been going when it left the person s hand?help
  33. Physics

    A compound known as cubic boron nitride has a similar structure to that of. A diamond .wat properties do u expect it to have??
  34. 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
  35. physics

    A car travels in a straight line for 4h at a constant spped 73km/h. What is its acceleration? Answer in units m/s^2
  36. physics

    for the uniform T shaped structure with mass 3M moment of inertia about an axis normal to the plane & passing through O would be
  37. physics

    3. If a man does 300 j or work by pushing a table 2.0 m across the room, what was the magnitude of the applied horizontal force?
  38. Physics-Intro

    Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.
  39. Physics

    Q1:Find the phase and group velocities of the de Broglie waves of an electron whose kinetic energy is 500kev?
  40. physics

    What are the magnitude and direction of the electric field at a point midway between a -7.0 µC and a +6.0 µC charge 2.5 cm apart? Assume no other charges are nearby.
  41. physics

    What force must be exerted on a car of mass 1825 kilograms in order to make it accelerate at 26 meters per second per second?
  42. physics

    calculate the energy consumed by a computer(150 W) that is used for 2.0 hours and a laser(250 W) that is used for 10 min? Answer is 1.2 Mj
  43. physics

    Find the first two harmonics of a linear mass density .002 kg/m and length 0.60m when it is subjected to tension of 50 N.
  44. physics

    A ray of light goes through the centre of a semicircular glass disk, n = 1.58, and onto a wall (x = 19.4 cm, y = 5.06 cm). What is the incident angle, θ?
  45. Physics

    How Much Work Is Done Against Gravity In Sliding A 500g Object Through 2m Up A Smooth Plane That Is Inclined 30degree To The Horizontal(g=9.8)
  46. physics

    Given that the power consumed by a device is 1000 W operating on a 70-V line, calculate the amount of current it draws.
  47. Physics

    What is the shortes possible time in which a bacterium could travel a distance of 8.4 cm across a Petri dish at a constant speed of 3.5mm/s?
  48. physics

    Suppose the horizontal sweep of an oscilloscope takes 80ms how many cycles of a 100 Hz wave will be shown?
  49. physics

    Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 4 rev/s. Answer should be in units of m/s Thanks
  50. 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?
  51. Physics

    I don't understand this question... What is the change in entropy for a system that has 250 J of heat added to it at 25°C? (Points : 1) 10 J/K 0.84 J/K 0.84 J/K 10 J/K
  52. Physics

    What is the acceleration of a skateboard down a ramp inclined at 19.5 degrees to the horizontal? 3.271 is the answer. This shouldn't be too tough, but I can't get it. Thanks!
  53. physics

    Three blocks are suspended at rest by the system of strings and frictionless pulleys shown in the figure below, where W = 29.0 . What are the weights w1 and w2?
  54. Physics

    is the mechanical energy of a teflon coated block sliding down a rough incline remaining constant?
  55. physics

    Determine the magnitude of the force of gravity acting on a 340 kg satellite , 850 km above Earth's surface.
  56. PHYSICS

    A CAR TRAVELLING AT 30M/S Overcome A FrictionAlly Resistance Of 100N While Moving.What Is The Power Of The Engine(Take 1 Hp=3/4 Kw)
  57. PHYSICS

    Calculate the centripetal force on a 2100 kg carrounding a curve of 175 m radius at a speed of 60 kph.
  58. Physics. PLEASE HELP!!

    When a 0.35 kg baseball is hit, its velocitychanges from 21 m/s to -29.5 m/s. What is the magnitude of the impulse de-livered by the bat to the ball? Answer in units of N · s
  59. Physics

    How much charge is contained in 9kg of protons? Express your answer to two significant figures and include the appropriate units.
  60. physics

    is increasing the current a valid method to increase the induced voltage when a magnet moves into a solenoid?
  61. physics

    The thermal capacity of 10g of a substance is 8 calories. the specific heat is in J/kg-K options : 1.3360 2.3630
  62. Physics

    Determine the tension in a 40 cm long pendulum when a bob of mass 200g moving at 0.7 m.s is 15 degrees from the vertical?
  63. Physics

    If the visible part of an ice berg is 50mx50m in area and 20m is above the surface, what is the height, h? I tried using FB=FG but I don't get anywhere. Can anyone help me out?
  64. physics

    A man holds a child on shoulders while watching a football match. How much work has he done if the game last for 2 hours
  65. physics

    A wave with frequency 11.3Hz and amplitude 48.1 mm moves in the positive x direction with a speed of 5.6 m/s. What is the waves wavelength?
  66. physics

    A wave with frequency 11.3Hz and amplitude 48.1 mm moves in the positive x direction with a speed of 5.6 m/s. What is the waves wavelength?
  67. Physics

    an 80kg man jumps off a 60m cliff, halfway to the ground, his GPE is 27,072J. What is his KE at the same moment?
  68. physics

    Sam tosses a ball horizontally off a footbridge at 3.2 m/s. How much time passes after he releases it until its speed doubles?
  69. Quantum Physics

    What is the probability current density of a particle with wavefunction ψ(x,t)=exp(iℏ(px−Et))?
  70. Physics

    A golf ball is chipped at an angle of 49 degrees and with a speed of 8.5 m/s. How far does it travel to the nearest tenth of a meter?
  71. Physics (Heat)

    Sitting under the fan on a hot day makes us feel cool.why? Give reason
  72. physics

    A ball is thrown upward with velocity 5m/s calculate total distance covered by it ?{ Using formulae (v)2 -(u)2. =2gs}
  73. physics

    what minimum initial velocity must aprojectile have to reach atarget at a distance of 25m away?(use g=10m/s square)
  74. 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
  75. PHYSICS

    A 3.1 kg bundle starts up a 30° incline with 139 J of kinetic energy. How far will it slide up the plane if the coefficient of friction is 0.30?
  76. Physics Help!

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

    A wattmeter shows that a motor is drawing 2200w. What horsepower is being delivered? Is this correct? 2200/746 = 2.95
  78. physics

    A block of mass 25.5 kg is released on a ramp with an angle of 31.70 degrees. The coefficient of friction is 0.45. Find the acceleration.
  79. PHYsics 101

    How much heat must be added to 4.00 kg of aluminum to cause its temperature to rise from 22°C to 252°C unit of answer must be Joule
  80. physics

    A small tiny nail may Pierce an inflated Tyre and remain there without pressure reduction.explain
  81. physics

    Sam tosses a ball horizontally off a footbridge at 4.8 m/s. How much time passes after he releases it until its speed doubles?
  82. physics, science

    What centripetal force is needed to keep a 10 kg object moving at a constant speed of 10 m/s in a circle having a radius of 11 m?
  83. Physics

    A laser is aimed at the moon. The spot of light is seen on the lunar surface 2.37 s later. What is the distance from Earth to the mooon
  84. physics

    Using Kepler's constant (9.84 X 10^-14), calculate the orbital radius of an artificial satellite whose period of revolution around the Earth is 1.43 X 10^4s(3.64 h).
  85. Physics

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

    How many electrons pass a given point in the circuit in 17 minutes? The fundamental charge is 1.602•10^-19. And the current is 0.526315789
  87. 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?
  88. Physics. PLEASE HELP!!

    Find the power input of a force F=(7 N)ˆý + (3 N) ˆk acting on a particle that moves with a velocity v = (6 m/s)ˆý. Answer in units of W
  89. Physics

    An infinite thread of charge density lamda lies along Z axis. The potential difference between the points A(4,3,4) and B (3,4,0)is?
  90. physics

    Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
  91. physics

    State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a -6.75DS?....
  92. Integrated Physics and Chemistry

    Which of the following forms of energy transfer can occur in a vacuum? A) conduction B) convection C) radiation D) all of the above Can I get some help on this one too, please?
  93. Physics

    Two forces whose resultants is 100N are perpendicular to each other. If one of them makes an angle of 60 degree with the horinzontal. Calculate its magnitude
  94. physics

    Two springs have force constant K1&K2 (K1>K2) .each spring is extended by same farce F. If their elastic potential energy are E1&E2then E1/E2)is?
  95. Physics

    If two pith balls - one which is neutral and another which has a charge of -9.6 uC (micro-Coulombs) - are touched together, how many extra electrons will each ball have?
  96. physics

    If the Sun shrank to the size of a black hole without losing any mass, what would happen to Earth's orbit?
  97. Physics

    How many electrons pass a given point in the circuit in 17 minutes? The fundamental charge is 1.602•10^-19. And the current is 0.526315789
  98. physics

    Write down a half-reaction that explains the change that occurs on the surface of the copper spoon during electrolysis.
  99. Physics

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

    An object is dropped from rest at a height of 112 m. Find the distance it falls during its final second in the air. m
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