physics please HELP !

74,755 results, page 51
  1. physics

    a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?
  2. PHYSICS-

    Given a plastic rod and fur,explain how you would charge the electroscope positively and negatively.
  3. physics 101

    A 72.9 kg man is standing on a frictionless ice surface when he throws a 1.6 kg book at 11 m/s.
  4. Physics

    Two charges +1C and -1C are placed at distance 1m apart ,each having masses 2kg respectively are released.what is the type of collision they experience?
  5. physics

    two charged objects carry a negative charge of 2*10c. calculate their distance apart
  6. physics

    a stone is thrown upward with a speed of 24.0m/s how fast is it moving when it reaches a height of 13.0m?
  7. physics

    If a man weighs 820N on d earth what would be on Jupiter, where the acceleration due to gravity is 25.9m/s
  8. PHYSICS

    What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high?
  9. physics

    what pressure would you expect if the gas in the flask were heated to 150 degrees celsius?
  10. Physics

    What acceleration will you give to a 24.9 kg box if you push it horizontally with a net force of 82.8 N? __________ m/s2
  11. Physics

    So if mgh=1/2mv^2 and I'm solving for v is my answer going to be v= squareroot of 2* (gravity) 9.8m/s^2* (height) 3.67m?
  12. Physics

    2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
  13. Physics (HELP)

    A real image is usually inverted, but can be upright in special cases. True or false?
  14. physics

    2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
  15. math

    In physics class, the girl to boy ratio is 3 to 4. If there are a total of 14 students, how many girls are there?
  16. Physics

    2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
  17. Physics (HELP)

    An object inside of the focal point of a concave mirror produces an image that is...
  18. Physics

    Leroy, who has a mass of 72 kg, is skateboarding at 5.9 m/s when he smacks into a brick wall and comes to a dead stop in 0.2 s.
  19. physics

    If the resultant velocity is 29.7 m/s and is directed at an angle of 22 degrees, what are the horizontal and vertical components?
  20. Physics

    Contrast the metric units of distance, time, and speed. Describe the relationship between them.
  21. Physics

    2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
  22. Physics

    2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
  23. physics

    A stone is thrown vertically upward with a speed of 14.0 m/s from the edge of a cliff 89.0 m high
  24. Physics

    The index of refraction of water is 1.33. What would be the speed of a light wave passing through at this medium? 4 x 10^8 m/s 2.3 x 10^8 m/s 4.4 x 10^-9 m/s 2.6 x 10-^9 m/s
  25. Physics

    The index of refraction of water is 1.33. What would be the speed of a light wave passing through at this medium? 4 x 10^8 m/s 2.3 x 10^8 m/s 4.4 x 10^-9 m/s 2.6 x 10-^9 m/s
  26. Physics

    What is the capacitance of a capacitor that stores 5.2 μC of charge on its plates when a voltage of 4.8 V is applied between them?
  27. Physics

    I want to become an astonomer or study astrophysics but I didnt do maths a level can I still do it? Is there any way you can help me or provide aN alternative
  28. math

    In physics class, the girl to boy ratio is 3 to 4. If there are a total of 14 students, how many girls are there?
  29. Physics

    What is the wavelength of visible light of 6 x 1014 Hz frequency? 500 nm 400 nm 4000 nm 4 nm
  30. Physics (HELP)

    The index of refraction of diamond is 2.42. What would be the speed of a light wave passing through a this medium? 8.1 x 10 ^-9 m/s 1.2 x 10^8 m/s 7.3 x 10^8 m/s 9 x 10^-9 m/s
  31. Physics

    Calculate the average speed of the car in km/h, it can accelerate from 96.56 km/hr in 4.3 seconds. Distance is not provided
  32. Active physics

    How much hear must be added to 1.5kg of water at -25degC to raise it up to 119degC?
  33. Physics

    When you jump vertically 0.86 meters above the ground, what is your acceleration when you reach your highest point?
  34. physics

    If a spring has a constant of 20N/m how much potential energy does it store if it is compressed 2m in joules? <3
  35. physics

    how to calcula distance of a object in free fall if only the time it reaches the ground is given
  36. physics

    Two asteroids, each with a mass of 6 million kilograms are attracted gravitationally with a force of 0.75 N. How far apart are their centers?
  37. Physics

    If one used a stiff vertical spring rather than a regular one what would be the results? The gravitational PE and the Elastic PE would decrease. Am i right?
  38. Physics

    A nurse counts 76 heartbeats in one minute. What are the period and frequency of the heart's oscillations?
  39. physics

    What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s?
  40. physics

    a pendulum swing with a speed of 1.5 m/s at its lowest point. How high will it rise before it stops
  41. Physics

    A bike starts from rest and accelerates to 20 m/s over a period of 6 seconds. What is the acceleration of the car?
  42. Physics

    How does the conservation of mechanical energy explain why a planet in an elliptical orbit changes speed?
  43. physics

    find the apparent weight of a 18 cm by 12 cm by 6 cm block of concrete with a mass of 1.82 kg that is submerged under water.
  44. physics

    The speed of a train increased from 15 mi/hr to 25 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2.
  45. physics

    an aluminium sphere of 20cm diameter is heated from 0¡ãc to100¡ãc. what is the change in its volume?
  46. Physics

    A runner runs 2.5 km eastward and turns northward to cver twice this distance. What is his displacement ?
  47. Physics

    What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?
  48. physics 8th grade

    If a woman hasa mass of 50 kg calculate her weight in neutons
  49. physics

    a truck moving at 100kph has a mass of 27000 kg. what force is necessary decelerate it at rate of -3 m/s²?
  50. physics

    Write down the unit in which reaction rate is measured in this observation? Equation is Zn(s)+I~ZnI
  51. Physics

    An object initially at rest experiences an acceleration of 9.8 m/s^2. How much time will it take to achieve a velocity of 58 m/s?
  52. Physics

    1. Name three different kinds of graphs that are often used to plot information and discuss the value of each. i have no idea what the heck this means
  53. physics

    Why is parallax method not useful for measuring the distances of stars more than 100 light years away?
  54. Physics

    what do you call the source of an intense narrow beam of coherent monochromatic light?
  55. physics

    A wheel has turned through 120 revs in 10 s after starting. find the angular acceleration.
  56. Physics

    What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?
  57. physics

    how can we derive the work-energy theorem form Newton's second law of motion?
  58. Physics

    What are two quantities of an object launched parallel to the ground which are equal to zero? I think one of the two is vertical velocity.
  59. physics

    if the resultant of 2 equal force inclint to each other at 60° is 8root3N. Find the component forces?
  60. Physics

    A car going 50 m/s undergoes an acceleration of 2 m/s^2 for 6 seconds what is the final velocity ? How far did it travel while it was accelerating?
  61. Physics

    Billy stands on a hill without slipping. In which direction is the force of friction acting?
  62. physics engg.

    A deutron is moving with a speed of 2*10^8m/s. Find the wavelength of the matter wave associated with it?
  63. physics

    What design aspects of the snowmobile make it particulary useful for travel over ice and snow?
  64. physics

    an iron bar measures 11 cm x 7 cm x 5 cm it is melted down to make a cylinder height of 9 cm what is its radius
  65. AP Physics

    If you are driving 116 km/h along a straight road and you look to the side for 1.0 s, how far do you travel during this inattentive period?
  66. Physics..PLZ HELP!

    The magnitude of the magnetic field 8.0 cm from a straight wire carrying a current of 6.0 A is A) 3.0 ƒÎ ~ T. B) 1.5 ~ T. C) 1.5 ~ T. D) 3.0 ~ T. E) 3.0 ~ T.
  67. Physics

    A cable lifts a 1060-kg elevator at a constant velocity for a distance of 39 m. What is the work done by each of the following?
  68. physics

    Consider the equation -mv0 +3mv0 = 4mvf. Where m and v0 are constants, Solve for vf. Simplify answer.
  69. Physics

    what is the mass of the toy truck if the force of friction holding it in place is 18.5N u= 0.2 at 30 degrees
  70. PHYSICS

    A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5-s time interval. What is its average acceleration?
  71. physics

    A standard 1 kilogram weight is a cylinder 48.5 mm in height and 52.0 mm in diameter. What is the density of the material?
  72. physics

    What quantity of energy is represented by 250cm^3 of a gas 100N.m^2 when the temperature is kept constant
  73. Physics

    What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? 0.33 -0.33 1.33 -1.33 I'm thinking B.
  74. Physics

    What is the image distance of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? -13.3 cm 13.3 cm -40.0 cm 40.0 cm
  75. Physics

    A ball travels 200cm in the first 2sec and 220cmin the next 5sec. Find the velocity at 7s
  76. Physics

    An engine works between the two temperatures 200 C and 120 C. Calculate its efficiency in percentage?
  77. Physics

    What is the instantaneous speed 3 seconds into the journey of a car traveling at a constant velocity of 10 m/ s?
  78. Physics

    A 1.15 kg block slides down a 19.0 m long 29.0° incline at constant velocity. How much work is done by friction?
  79. physics

    Can an adult male be rescued from a fall by tying a rope to a car's axle?
  80. Physics

    Given that q = +17 mu C and d = 14 cm, find the magnitude of the net electrostatic force exerted on the point charge q2.
  81. Physics

    KNOWNS: Diverging (convex) mirror Radius of curvature = 60 cm (f = 30 cm) M = 1/5 Hi = 20 cm UNKNOWNS: Ho? Di? Do? EQUATIONS: 1/Do + 1/Di = 1/f M = Hi/Ho = -Di/Do
  82. physics

    When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?
  83. physics

    If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 63 cm*29 cm*20cm, what would its mass be?
  84. physics

    When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?
  85. physics

    the height of the mercury in the glass tube thermometer when in melting ice and then steam are 3 cm and 18 cm respectively
  86. Physics

    how much work is needed to stop a 20kg bullet moving with a speed of 150m/s?
  87. Physics

    How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?
  88. physics

    A fisherman's scale stretches 3.5 cm when a 2.1 kg fish hangs from it. What is the spring stiffness constant?
  89. physics

    A 32 kg girl runs up a flight of stairs that is 30 m high. How much work does this require? Not sure how to even start
  90. physics

    At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?
  91. Physics

    Calculate the momentum of a bullet moving with a velocity of 1000m/s ,if it has a mass of 0.01kg
  92. physics

    2.) A sports car is advertised to be able to stop in a distance of 50m from a speed of 90 km/h. What is its acceleration in m/s^2? How many g's is this (g=9.80 m/s^2)
  93. physics

    A cart travels a constant speed of 2.80 ± 0.01 m/s for a time of 8.80 ± 0.04 s What is uncertainty, &deltax, in the distance, ?
  94. physics

    What is the temperature of an ideal gas whose molecules have an average translational kinetic energy of 3.90 10-20 J? K
  95. Physics

    When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.6 m/s in 0.11 s . Distance?
  96. physics

    what is the power of a 6 ohm bulb when 3 of such bulbs ar econnected in a 12 volt parallel circuit?
  97. physics

    if an object has a mass of 615grams and a volume of 150cm3 is the density 5.86g/cm3
  98. physics

    Calculate the total force of the atmosphere acting on the top of a table that measures 1.9 m by 2.3 m.
  99. physics

    What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway?
  100. physics

    What is the pressure exerted on the ground by a cube which has a weight of 600N and a side of 1m2