physics please HELP !

74,755 results, page 86
  1. physics 1

    a helicopter is flying at an altitude of 1000 m above the ground, with a horizontal velocity of 50 m/s, how far from the rally point should the relief package be dropped?
  2. physics

    1 A steel wire, 150 m long at 10¢XC, has a coefficient of linear expansion of 11 „e 10ƒ{6/C¢X. Give its change in length as the temperature changes from 10„aC to 45„aC. 5.8 cm
  3. physics

    A basketball is thrown at 45° to the horizontal. The hoop is located 4.5m away horizontally at a height of 1m above the point of release. What is the required initial speed?
  4. Physics

    Two positive charges one 2uc and the other 7uc are separated by a distance of 20cm, what is the magnitude of the electrostatic force that each charge exerts upon the other
  5. Physics

    Two positive charges one 2uc and the other 7uc are separated by a distance of 20cm, what is the magnitude of the electrostatic force that each charge exerts upon the other
  6. Physics

    An elevator is moving upward 1.17 m/s when it experiences an acceleration of 0.33 m/s2 downward, over a distance of 0.75 m. What will its final speed be? Answer in units of m/s
  7. PHYSICS

    SIMPSON DRIVES HIS CAR WITH AN AVERAGE VELOCITY OF 48.0KM/H TO THE EAST. HOW LONG WILL IT TAKE HIM TO DRIVE 144KM ON A STRAIGHT HIGHWAY?
  8. Physics

    An austronaut orbits the Earth in the space shuttle, in one complete orbit, is the magnitude of thr displacement the same as the distance traveled?
  9. Physics

    A roller coaster moves 4.2 m horizontally, then travels 6.9 m at an angle of 30º above the horizontal. What is the resultant displacement from its starting point?
  10. physics

    How does the width of the central region of a single-slit diffraction pattern change as the wavelength of the light increases? Look at the formula on this.
  11. physics

    2 ants cross a counter 54cm long, one travels at 16 meters per second, and the other at 3.99999 centimeters per second. when the first crosses the finish line how far behind is the second?
  12. physics

    water 20 degrees celsius flows through a 25 mm diameter pipe at a rate of 50 liters per minute. is this laminar or turbulant flow or both?
  13. Physics

    An object is dropped from a cliff thatis 256 m above the sea. just prior to splashing into the water, how fast is it going? How long did it take to fall?
  14. Physics Honors

    The same rock is thrown upwards at an angle of 45 degrees. It travels 10 meters up to its maximum height. How far will it travel before it lands?
  15. Physics

    A ball thrown vertically upward and return in20 seconds.find the velocity and the maximum height with explanation
  16. Physics

    I'm confused about this question: "A car traveling at 60 mi/h stops in 6 seconds. How far does it travel during this time?" I can't figure out what formula to use, or how to begin solving this.
  17. physics

    how much output I can get if a coil having 100000 turns moves pass a strong 3000 gauss neodymium magnet only once a time?
  18. physics

    two vhiles move in opposite dirctions to each other with constant speeds of 20 m/s and 30 m/s if the initial distance betwen the vehicles is 100 km. how many second later do they meet
  19. Ap Physics

    On a clear day at the equator with the sun directly overhead, how long would it take to warm 10 kg of water 15 Co if the emissivity of the 1.0 m 2 surface is 1? can someone help me work this out?
  20. physics

    a man 60 kg skating with a speed of 10 m/s collides with 40 kg skater at rest and they cling to eachother. Find the loss in kinetic energy?
  21. Physics

    If a disk and hoop are released simutaneously 1.0m above the ground at a 30 degree incline which one will reach the bottom faster? Show mathematically.
  22. Physics

    In the rope climb, a 68 athlete climbs a vertical distance of 9.0 in 13 . What minimum power output was used to accomplish this feat? In Watts
  23. physics

    2 ants cross a counter 54cm long, one travels at 16 meters per second, and the other at 3.99999 centimeters per second. when the first crosses the finish line how far behind is the second?
  24. Physics Need help plz

    An 1900 kg car is traveling with a speed of (22 +- .22) m/s. With what maximum accuracy can its position be determined? delta x= in meters Can someone please help me out I am lost on this on...Thank you
  25. physics

    Mrs bautista accelerates her bicycle uniformly along a straight path from 10.5 m/s to rest in 5.2s. A. What is her acceleration? B. What is her displacement during this time interval?
  26. explian why please its physics

    expliain y the very high specific heat capacity of water leads to formation of land and sea breezes???
  27. Physics

    A weightlifter raises a barbell of mass 150 kg from the floor to over his head 2.5 meters in 3 seconds. What is his average power input?
  28. PHYSICS

    How much work did the movers do (horizontally) pushing a 140-kg crate 10.1 m across a rough floor without acceleration, if the effective coefficient of friction was 0.60?
  29. Physics

    How much work did the movers do (horizontally) pushing a 140-kg crate 10.1 m across a rough floor without acceleration, if the effective coefficient of friction was 0.60?
  30. Physics

    A car of mass is 100 kg applies break from 40 km per hours to 0 .it takes 12 seconds .what amount of force is applied for breaks?
  31. Physics Need help plz

    An 1900 kg car is traveling with a speed of (22 +- .22) m/s. With what maximum accuracy can its position be determined? delta x= in meters Can someone please help me out I am lost on this on...Thank you
  32. Physics

    How much work did the movers do (horizontally) pushing a 140-kg crate 10.1 m across a rough floor without acceleration, if the effective coefficient of friction was 0.60?
  33. Physics

    In the rope climb, a 68 kg athlete climbs a vertical distance of 9.0 m in 13 s. What minimum power output was used to accomplish this feat? In Watts
  34. physics

    an object falls directly from a plane flying horizontally at an altitude of 10000ft at 50mi/h. how long will it take to hit the ground?
  35. Physics

    How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 85 m at a speed of 95 km/h?
  36. physics

    Four 6.0 kg spheres are located at the corners of a square of side 0.70 m. Calculate the magnitude and direction of the gravitational force on one sphere due to the other three.
  37. physics

    Two forces F1 and F2 ifF1is double that ofF2 and the resultant is perpendicular on F1 then the angle betwee them is Expain ans with reason and diagram
  38. physics

    What's the shortest air column , closed at one end, that will resonate at a frequency of 440.0Hz when the speed of sound is 352 m/s
  39. Physics

    Describe two advantages and one disadvantage of using high-voltage power fro tranmission lines. I honestly have no idea and could really use some help with this. Thanks in advance. :)
  40. physics

    a sportsman develops a maximum speed of 12 m/s when he is swimming in a pool. Calculate the time interval that is required to travel a distance of 25 m.
  41. physics

    list any two properties for each of the following case of metals which make them suitable to be used as: (1)utensils for cooking food (2)wires for electrical connection
  42. physics

    race car travels on racetrack at 38m/s and slowa at a constant rate of 20m/s over 10s how far does it move during this time
  43. Physics

    An object of mass 20kg slides down an inclined plane at an angle of 30 degree to the horizontal. The coefficient of static friction is?
  44. physics

    show a car that travels 5 km due east and makes a u-turn to travel another 3 km find distance covered and its displacement
  45. physics

    from point A, a boy walks 4 m to the east,2 m to the sout, 4 m to the west , and finally, 2 m to the north , find the distance he travelled and his displacement
  46. Physics

    A horse canters away from its trainer in a straight line, moving 120 m away in 11.0 s. It then turns abruptly and gallops halfway back in 4.9 s.
  47. physics

    a mettallic rod of lenght l is rotated with speeed v in uniform magnetic field. find induced current if r is resistance.
  48. physics

    When moving at highway speed, a Triumph America motorcycle is capable of accelerating at 2.1 m/s2. At this rate, how long does it take to accelerate from 103 km/h to 88 km/h?
  49. science(physics)

    give an example of projectile motion;include in your explantion the term velocity , accleration and displacement orginality in your example will be appreciated?
  50. PHYSICS

    When moving at highway speed, a Triumph America motorcycle is capable of accelerating at 2.1 m/s2. At this rate, how long does it take to accelerate from 103 km/h to 88 km/h?
  51. PHYSICS

    WHAT MEASUREMENT IS 60KG? Mass is measured in kilograms, kg. In metric, be careful of capitalization I would use flash cards to memorize units.
  52. Physics- science

    An automobile with an initial speed of 4.82 m/s accelerates uniformly at the rate of 2.2 m/s2. Find the displacement of the car after 5.9 s. Answer in units of m
  53. physics

    brakes are applied in bringing in a 1200-kg car moving at 25 m/s to rest in 20.0 s. show that the amount of braking force is 1500n.
  54. physics

    What is the minimum speed, relative to the Sun, necessary for a spacecraft to escape the solar system if it starts at the Earth's orbit? Please tell me what formula
  55. physics

    A ball is thrown straight up and reaches a maximum height of 7.16 m. What was its initial speed? The acceleration of gravity is 9.8 m/s Answer in units of m/s.
  56. Physics

    Calculate the skid to stop distance of a car traveling on a road at 100 kilometers per hour with a coefficient of friction of 0.68.....
  57. Physics

    An auto race is held on a circular track. A car completes one lap in a time of 19.2 s, with an average tangential speed of 39.8 m/s
  58. 11th grade physics

    if action and reaction are always equal and opposite, why don't they always cancel each other and leave no force for acceleration of the body?
  59. 11th grade physics

    the horizontal range of a projectile is 4 root 3 times of its maximum height. calculate the angle of projection.
  60. Physics

    The slab of steel shown below is being lifted at 0.50 m/s. It weighs 1.91×103N. If the angle θ equals 61.4 degrees, what is the tension in each cable?
  61. Physics

    the potential energy of a particle varies with velocity v as U equals to Av3/v + B where A and B are constant dimensional formula A/B is (1) ML-1T (2) M-1LT (3) L-1T-1 (4) MLT-1
  62. physics

    determine the static coefficient of friction if a box will be rasied at rest, right up until the point that the board on which it is sitting gets raised to 53 degrees.
  63. Physics

    A plane travels with a uniform velocity of 3.399x10^1 m/s for a period of 2.267x10^0 seconds. What distance is travelled during this time, in meters
  64. physics

    Show that the critical velocity of body revolving in cercular orbit very close to the surface of a planet of radiuis R and meandencity.
  65. physics

    brakes are applied in bringing in a 1200-kg car moving at 25 m/s to rest in 20.0 s. show that the amount of braking force is 1500n.
  66. physics

    find the initial velocity of a car stop in 10 second by applying breaks the reaction due to break is 2.5 metre per second square
  67. Physics

    A Saturn V rocket with an Apollo spacecraft attached has a combined mass of 2.1 105 kg and will reach a speed of 11.2 km/s. How much kinetic energy will it then have?
  68. physics

    A missile is fired at an initial velocity of 1500m/s. What should be the angle to reach a maximum horizontal target? (Show proof) I need your help.
  69. PHYSICS

    Two 75 kg hockey players skating at 5.50 m per s collide and stick together. if the angle between their initial directions was 120 degress, what is their velocity after the collision?
  70. Physics

    A triply ionized beryllium atom (Be3+) has only one electron in orbit about the nucleus. What is the radius of the ion when it is in the n = 9 excited state?
  71. physics

    If the coefficient of kinetic friction is 0.25 , how much horizontal force is needed to pull each of the following masses along a rough desk at a constant speed? A) 25 kg
  72. physics

    A particle is drop from a vertical height (h) and falls freely for a time(t) with the aid of a sketch explain how (h) varies with (I) t (ii) t square
  73. physics

    Find the angular velocity of a body rotating with an acceleration of 2 rev/s square as it completes the 5th revolution after the start.
  74. Physics

    A 21kg crate is pushed across the floor at a constant velocity by a 350N force. Determine the coefficient of kinetic friction.
  75. physics

    find the equilibrium of two is N forces acting upon a body,when the angle betweenthem is a)90degrees b)120degrees c)180degrees d)10degrees e)45degrees
  76. Physics

    A projectile is fired straight up at a speed of 16 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 . Answer in units of s.
  77. Physics

    A baseball with mass of 0.145 kg is thrown straight down at the ground. At a particular speed, it has a drag force of 0.4 N acting on it. What is its acceleration at that time? -2.8m/s^2
  78. Physics

    A helium balloon is tied to a brick and dropped into the lake. As the balloo sinks the buoyant force acting on decrease.
  79. physics

    Determine how much water would be present in a 10 tonne sample of lignite, has a moisture content of 65%, before crushing and drying. 10 tonnes is 10,000 kg.
  80. Physics

    A stone thrown upward to just reach the top of a palm tree that is 8.2m tall. Calculate the initial speed that is require
  81. physics

    A car starts from rest and accelerates uniformly to a velocity of 8ft/s after traveling 250 ft. Find its acceleretaion. Help me with this pleeaase. Thank you.
  82. Physics

    A motorcycle with a mass of 350 kg is accelerated from rest to a velocity of 30 m/s by a force of 4000 N. calculate the distance over which this acceleration occurred.
  83. physics

    Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act A)0.98N. B)62N C)44.5MN
  84. physics

    how the frequency of the sound produced will change in the case of aluminium sting of length 15cm when the string is tied between two ends
  85. physics

    A 1.2 lead ball is launched off a cliff top at 16 m/s Determine the balls kinetic energy at position P. Ignore friction
  86. physics

    suppose a car travels at a constant 10m/s how far would it move in 1hr? in 1min? 1ms? could you please explain how i would solve this equation
  87. Physics

    Calculate the energy released when 235 U fissions resulting in two lighter stable nuclei with mass numbers 140 and 93.Please help!
  88. physics

    Find the pottential energy of a boy of mass 10kg standing on a building floor 10 meters above the ground level p.e?
  89. physics

    A 3kg basketball is dropped from the top of a 120m building. if all of the energy is converted into KE, what is the velocity of the ball just before it hits the ground
  90. physics

    What constant horizontal force, acting over 16 m of level trail, gives a friction-free 51-kg skier, starting from rest, a speed of 5.7 m/s?
  91. Physics

    Hi, Which correctly expresses the relationship between wavelength (L), speed (V) and perios (T) of a sinusodial wavform ? a) L = T/V b) L= 2fxV/ T c) L= 1 / V x T D) L= V/T e) L = V x T f) L= V x T/ 2f I feel it is option (d) ..please check for me .. and
  92. Physics

    A block weighing 6.2 N requires a force of 2.2 N to push it along at constant velocity. What is the cooefficient of friction for the surface? Plsssss help asap..
  93. Physics

    Calculate the potential energy of a 40 gram sparrow resting on a branch 30 feet above the ground. (Hint: 1 foot = 0.305 m)
  94. Physics

    A wire length 2m and radius 1mm is stretched by 25mm on application of a force of 1000N.Calculate the young modulus
  95. General Physics II

    Find the length of the arc on a circle of radius 10 ft intercepted by a central angle 276. Answer in units of ft.
  96. General Physics II

    A 8.4 kg object oscillates on a spring with an amplitude of 57.7 cm with a maximum acceleration of 9 m/s2. Find the total energy. Answer in units of J.
  97. physics

    A glacier advances at 4.3 × 10−6 cm/s.How far will it move in 6.4 years? Assume there is 365 days each year. Answer in units of cm. Thanks in advance!!
  98. Physics

    Which electromagnetic radiation can be used in space to detect low temperatures? Gamma Rays Infra Red Ultra Violet Or any of the others?
  99. physics

    a 35.5kg box slides down an incline plane with a 25 degree angle at a constant rate. how do i calculate the coefficient of friction
  100. physics

    consider the loop in the figure. The area=600m, and it spins with angular velocity =40.0 rad/s in a magnetic field of strnght B=.400 T