Physics!

74,730 results, page 59
  1. physics

    if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
  2. physics

    A car travels in a straight line for 4.8 h at a constant speed of 57 km/h . What is its acceleration? Answer in units of m/s
  3. Physics

    I don't understand how to do this : A force of 40 N accelerates a 7.17 kg block at 6.0 m/s2 along a horizontal surface. Determine the normal.
  4. physics

    if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
  5. physics

    calculate the work done in lifting a 300N weight to a height of 10m with an acceleration 0.5 m/s square.
  6. PHYSICS

    If a DeLorean rolls gently (vo = 0) off a vertical cliff, how long does it take it to reach a downward velocity of 78 km/h?
  7. physics

    show the expression v=at is dimensionally correct where v represents speed an acceleration and t is instant time?
  8. Physics

    Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at? Why?
  9. physics

    A commuter backs her car out of her garage with an acceleration of 1.6 m/s2. How long does it take her to reach a speed of 2.3 m/s in seconds
  10. Quantum Physics

    An electron drop to what energy level is likely to emit a photon in the infrared region?
  11. physics

    The position of a particle moving along the x axis is given by x = (21 + 22t − 6t^2)m, where t is in s. What is the average velocity during the time interval t = 1s to t = 3s?
  12. Physics

    A car travels in a straight line for 4 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s^2?
  13. physics

    What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 ?
  14. Physics

    If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves?
  15. physics

    a 50 gram object is accelerating at a rate of 5 m/s2. calculate the force needed to produce this acceleration
  16. Physics

    Does an object moving in a circle obey the law of inertia? Which way would it move if there were no net force on it?
  17. physics

    Two uniform spheres , each of mass M and radius R, touch one another. What is the magnitude of their gravitational force of attraction?
  18. Physics

    A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules
  19. Physics

    A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules or J
  20. physics

    Figure 18-23 shows three linear temperature scales, with the freezing and boiling points of water indicated.
  21. Physics

    Wat direction will the Electric Field Lines be in a parallel plate capacitor containing a dielectric ?
  22. Physics

    A stone is thrown vertically upward with a speed of 19.0m/s How fast is it moving when it reaches a height of 10.0m
  23. Physics

    How long will it take a 1830 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?
  24. physics

    (a) What is the torque about the origin on a jar of jalapeno peppers located at coordinates (1.0 m, -4.0 m, 2.0 m) due to force F1 = (-3.0 N) + (2.0 N) + (-5.0 N) ?
  25. Physics

    Two equal points charges of +3.00 X 10-6C are placed 0.200m apart. What are the magnitude and direction of the force each charge exerts on the other?
  26. PREAP Physics

    From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/hr?
  27. Physics

    How do you know when to use cos or sin or tan when they give you angles in the question to find tension or force?
  28. physics

    A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal. How far does it move horizontally
  29. Physics

    A 1300 sports car accelerates from rest to 90 in 6.5 . What is the average power delivered by the engine?
  30. Physics

    A record has an angular speed of 47 rev/min. Through what angle does it rotate in 1.07 s? Answer in units of ra
  31. physics

    Resultant displacement from 12m east to5m north to9m vertically upward
  32. physics

    According to Newton's version of Kepler's third law, how would the ratio T^2/r^3 change if the mass of the Sun were doubled?
  33. physics

    If a DeLorean rolls gently (vo = 0) off a vertical cliff, how long does it take it to reach a downward velocity of 78 km/h?
  34. physics

    Correct the following statement: The racing car rounds the turn at a constant velocity of 145 km/hr.
  35. Physics

    What is the resonant frequency in an RLC circuit if R=5 , C=6, and L=12 mH, and V-115 V? (a) 593 (b) 41,400 (c) 1560 (d) 1793
  36. Physics

    What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the second excited state?
  37. Physics

    At the end of a race a runner decelerates from a velocity of 7.00 m/s at a rate of 0.500 m/s2. (a) How far does she travel in the next 14.0 s in meters?
  38. Physics

    i have to build a enery effiecient vehicle for class and do a opapp paper and i need help im so confused.... any ideas?
  39. physics

    a cyclist does work at the rate of 500w while riding. how much force does her foot push with, when she is traveling at 8.0 m/s?
  40. Physics

    A solid weigh 45N and 15N respectively in air and water. Calculate the relative density
  41. AP Physics

    What is the potential energy of an electron and proton in a hydrogen atom if the distance between them is 5.3*10^-11? ANSWER k=9*10^9 Q=1.6*10^-19 q=1.6*10^19 Ue=? Ue=KQq/r Ue=-4.4*10^-18 j
  42. Physics

    what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?
  43. physics/electrical circuits

    if there are eleven resistors of 33k ohms each in parallel, what is the total resistance?
  44. physicS

    What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?
  45. Physics

    An object with a mass of 3kg is dropped from 56.3 meters. How far above the ground is it's kinetic energy 1073J?
  46. PHYSICS

    The force applied by the e-brake is F(eb) = m*a(eb) = -8.13*1452 = -12,100 N I didn't get the same answer - I got 11,804.76....please check
  47. physics

    A 15 kg box slides across the floor with an initial velocity of +7.6 m/s. It comes to a stop after sliding +14.8 m. How much friction was present?
  48. Physics

    When you swim across a river does the time it takes to get to the other side depend on the rate of flow of the water?
  49. physics

    calculate the linear momentum of a truck with a mass of 13065kg that is traveling at 36m/s eastward.
  50. physics

    a particle starts moving from rest with uniform acceleration . it travels a distance y in the next 2 sec
  51. physics

    Calculate the speed of an 7.6×104 kg airliner with a kinetic energy of 1.2 × 109 J. Answer in units of m/s
  52. physics

    A 50kg person standing on both feet cover a surface about 13 cm x 12 cm. How much pressure is on the sole of their shoes?
  53. Health Physics

    As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
  54. physics

    What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?
  55. Physics

    Two ants race across a table 65 cm long. One travels at 5.76 cm/s and the other at 3.99999 cm/s. When the first one crosses the finish line, how far behind is the second one?
  56. Physics

    a woman on a bridge 75 high sees a raft floating at a constant speed on the river below.
  57. Physics

    A mass of gas has a volume of 380 cm3 at a pressure of 560 mm Hg and a temperature of 7C. What is its bolume at s.t.p.?
  58. Physics

    If a force of 15.0 N directed east acts on a stationary 5.00 kg mass, what are its acceleration, displacement, and velocity after 10.0 s?
  59. Science: physics

    Why does the moon not require a push to keep it along its orbit around the earth? -I have to use Newton's first law of motion.
  60. Physics

    If a force of 15.0 N directed east acts on a stationary 5.00 kg mass, what are its acceleration, displacement, and velocity after 10.0 s?
  61. physics/math

    If you are driving 116 km/h along a straight road and you look to the side for 3.0 s, how far do you travel during this inattentive period?
  62. Physics

    What is the gravitational force between the proton (1.67X10^-27 kg) and the electron (9.11X 10^-31 kg) in a hydrogen atom if they are 3.00X10^-10 m apart?
  63. Physics

    A guitar string has a mass of 30g and length of 2m. Find the tension if its density is 0.2kg/m^3
  64. physics

    Find the acceleration of the two blocks sliding down the incline in the figure below. (Take m1 = 1.1 kg and m2 = 1.8 kg. Indicate the direction with the sign of your answer
  65. physics

    if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
  66. Physics

    How much force is required to accelerate a 1500kg car to a speed of 17m/s in a distance of 45m? Thank you.
  67. physics

    What is the magnitude of the momentum of a car weighing 1,555 N when it is moving at a speed of 23 m/s? Express your answer in kg m/s.
  68. Health Physics

    As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
  69. physics

    You should expect concrete to have an elastic constant that is _____ than wood. a. larger than b. smaller than c. equal to
  70. Physics

    A stone is dropped into a bore well 490m deep.after how time,the sound of splash of will be heard
  71. Physics

    A stone is dropped into a bore well 490m deep.after how time,the sound of splash of will be heard
  72. physics

    Calculate the force of gravity on a spacecraft 12800 km above the earth's surface if its mass is 700 kg.
  73. Physics

    What is the mass of water in a closed room 5.2m x 6.3m x 2.5m when the temperature is 24 degrees celsius and the relative humidity is 65%?
  74. Physics

    How much momentum does a .01 kg ping pong ball have if it is traveling at 25 miles/hour? (1.609km=1 mile)
  75. Physics

    How much momentum does a .01 kg ping pong ball have if it is traveling at 25 miles/hour? (1.609km=1 mile)
  76. Physics

    With the energy needed to warm up some amount of water from 40C to 64C, how high could you lift it?
  77. Physics

    A dragster's top acceleration is 60m/s^2. If it accelerates for 3 seconds from the starting line, how fast will it be going?
  78. physics

    Calculate the time elapsed if the speed of a truck going south is reduced from 80 km/h to 44 km/h in a distance of 250 m.
  79. physics

    An airplane lands and starts down the runway at a southwest velocity of 48 m/s. What constant acceleration allows it to come to a stop in 1.5 km?
  80. Physics

    A long jumper leaves the ground at an angle of 24.3◦ to the horizontal and at a speed of 10.6 m/s. How far does he jump?
  81. physics

    How high will an object rise if it is projected upward at a 45 degree angle and an initial velocity of 50 m/s?
  82. physics

    A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively.
  83. physics

    2. A hockey player is skating in a straight line at 1.5 m/s. He then increases his speed to 7 m/s in 3 s. What is his average acceleration during this 3 s?
  84. Physics

    How long does it take T-Rex to reach its food 200m away assuming that he starts from rest and accelerates at 4.00 m/s2?
  85. physics-non calc

    a hammer was released from rest vi=0m/s taking 1.12 seconds to fall 1 meter. How do you solve that
  86. physics

    4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30
  87. physics

    find the change n momentum of a 1120-kg car that increases its speed / what minimum force is need to do this?
  88. Physics

    A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine?
  89. physics

    a block of wood of 200g is thrown vetically with a veloncity of 20mls what is the pontential energy?
  90. Physics

    A motor cyclist travelling at 12m/s decelerate at 3m/s(squared)? How far does he travel while coming to rest?
  91. Physics

    Consider a pair of planets for which the distance between them decreases by a factor of 5. Demonstrate that the force between them becomes 25 times greater
  92. College Physics

    How much would you have to raise the temperature of a copper wire (originally at 20 ∘ C) to increase its resistance by 30% ?
  93. physics

    a 747 airliner reaches its takeoff speed of 170 in 35.0 .what is the magnitude of its average acceleration
  94. Physics

    I am curious how the earth work as an omnipresent conductive surface in an electrical distribution system?
  95. Physics

    a bb gun has a muzzle velocity of 325 ft/sec. How long will it take the bb to hit the ground? How far will the bb travel?
  96. Physics

    I don't understand any thing about the centripital force and torque please HELP me to solve problems about this topics.
  97. Physics

    How much potential energy is required to lift a 50 gram arrow to a height of 100 meters?
  98. physics

    How high will an object rise if it is projected upward at a 45 degree angle and an initial velocity of 50 m/s?
  99. physics

    two equal vectors of magnitude 2A are inclime perpendicular to each other find the resultant and direction of vector.
  100. physics

    A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively.