Physics!

74,760 results, page 82
  1. physics

    A 70 ohm resistor is connected to a 6.7 V battery in the circuit below.When the switch is closed, calculate the current I. Answer in units of A.
  2. Physics

    A 20,000 kg vehicle is running at 80km/hr in a rotonda with a radius of curvature 25m compute for the centripetal force
  3. physics

    In the following list of periodic waves, which one is independent of the others: frequency, wavelength,speed,amplitude? Plese show all work Thank you
  4. physics

    A satellite orbits at an average altitude of h = 441 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 1024 kg.
  5. physics

    A motorboat traveling on a straight course slows down uniformly from 75km/h to 40km/h in a distance of 50m. What is the boat’s acceleration?
  6. physics

    A motorboat traveling on a straight course slows down uniformly from 75km/h to 40km/h in a distance of 50m. What is the boat’s acceleration?
  7. physics

    A uniform steel chain 20 m long and with a mass of 5 kg per m, hangs vertically. Compute the work required to wind it up
  8. physics...one last time

    A mortar elevated to 60 degrees scores a hit 15 m up a building 30m away. with what speed was the shell fired?
  9. Physics

    h_ttp:_//img215_.imageshack_.us/gal_.php?g=88875061_.jpg Anyone care to do....all the problems D:. Yes, I am desperate. (take away the underscores)
  10. PHYSICS

    What is the direction (vertical or horizontal) of the transmission axis of Polaroid sunglasses? Give the physical reason for your answer.
  11. physics

    three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and q1q3=r)
  12. Physics

    Touching a Van de graff generator and slowly moves away from the dome why he touches it again he recives a stron shock why ?
  13. physics

    A quantity of steam (750 g) at 122°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?
  14. Physics

    How much work is done by a boy weighing 450. Newtons while carrying a 20.0 kilogram package up a 2.00 meter flight of stairs?
  15. physics

    a man walks 8km North and then 5km in a. direction 60degrees. find its distance from his starting point
  16. Physics

    A myopic student is shaving without his glasses. If his eyes have a far point of 1.5, what is the greatest distance he can stand from the mirror and still see his image clearly?
  17. physics

    a rock with a mass of 2 kg is thrown from the top of a cliff 75 m high with a velocity of 10m/s. how much Kinetic energy does it have when it gets to the bottom?
  18. Physics

    A car starts from rest and accelerates uniformly at 2m/s2 for 10 sec . Find the velocity and displacement at the end of 10 seconds .
  19. physics

    The work done by non-conservative forces is equal to the total change in kinetic and potential energy. True or False?
  20. PHYSICS

    What is the direction (vertical or horizontal) of the transmission axis of Polaroid sunglasses? Give the physical reason for your answer.
  21. physics

    The gravitational field strength of an unknown planet is 15.5 N/kg on its surface. Calculate the value of g if the planets mass and radius were both doubled.
  22. Physics??

    A car is traveling at a speed of 62 on a freeway. If its tires have diameter 24.0 and are rolling without sliding or slipping, what is their angular velocity?
  23. physics

    If You do 100 j of work to elevate a bucket of water,what is its gravitational potential energy relative to its starting position?
  24. physics

    three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and q1q3=r)
  25. physics

    A 326 g object is attached to a spring and oscillates with a period of 0.25 s. The total energy in this system is 5.83 J. What is the amplitude of the motion?
  26. Physics HELP!!!

    A ball is kicked at an angle of 50 with a velocity of 14m/s. a. how long is it in the air? b. how high does it rise? can someone please explain to me how to solve this???
  27. College physics

    A skier traveling at 30.9 m/s encounters a 21.5 degree slope. If you could ignore friction, to the nearest meter, how far up the hill does he go?
  28. physics

    Charge polarization is normally produced by ____________________. A) nuclear interactions.B) contact.C) induction.D) friction.E) electrostatic means.
  29. physics

    three resistors of 2ohm, 3ohm and 4 ohm are connected in (a) series (b) parallel. find the equivalent resistance in each case
  30. physics

    A quarterback threw a football at 27 m/s at a certain angle above the horizontal. If it took the ball 3.3 s to reach the top of its path, how long was it in the air? s
  31. physics 11

    a small 900kg sports car can deliver 100Hp to the pavement. how quickly can it reach 30m/s from rest?
  32. physics

    A chunk of Martian rock falls off of a cliff and drops 47.7 m in 5.00 s. What is the acceleration due to gravity on the surface of Mars?
  33. physics

    Calculate the average velocity for a remote controlled vehicle that starts with a speed of 1.0 m/s [forward] and then accelerates at 0.08 m/s2 [backward] for 4.0 s.
  34. AP Physics PLEASE respond immediately pleasethanku

    THANK YOU!! What is a combination of h (plancks constant), c(speed of light) and G (6.67x10^-11 Nm^2 / kg^2) that has units of length?
  35. physics 101

    What minimum speed does a 150g puck need to make it to the top of a 4.5m -long, 21degree frictionless ramp?
  36. Physics

    What magnitude of acceleration will result when 60N and 80N forces in opposite direction if applied to a 5kg body?
  37. physics

    An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed?
  38. physics

    AC power in the United States has 60 cycles per second. What is the period (in seconds) for this current? Round your answer to 3 decimal places.
  39. physics

    A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.3 N acts on it for a distance of 0.5 m
  40. physics

    Calculate the average velocity for a remote controlled vehicle that starts with a speed of 1.0 m/s [forward] and then accelerates at 0.08 m/s2 [backward] for 4.0 s.
  41. Physics

    Can someone help me with finding out the magnitude of the gravitational force a person with a mass of 67.5 kg would experience while standing on the surface of Earth? Thanx in advance.
  42. physics

    The car is travelling along the road with a speed of v  (300 / s) m/s, where s is in meters. Determine the magnitude of its acceleration when t = 3 s if t = 0 at s = 0. ( ans: a = 1.28 m/s2).
  43. physics

    A body moves along a straight line from rest with an acceleration of 2m/s². Calculate the time taken by it to cover a distance of 100m.
  44. Physics

    Measurements can be described as accurate and/or precise. Define accuracy and precision and give examples of how those terms could be used to describe a measurement.
  45. Physics

    A bullet fired target loses half of it velocity in penetrating 15cm .how much further it will penetrate before coming to rest
  46. physics

    which one of the property is true for mirror 1-refraction 2-refletion 3-communication 4-measuring length 5-gravity 6-heating object
  47. physics

    A body moving with a velocity of 3m/s is brought to rest by a constant force after travelling 15m, calculate the retardation.
  48. physics

    a basketball player achieves a hang time of 0.996 s in dunking the ball. What vertical height will he attain?
  49. physics

    What is the moment of inertia of a solid cylinder of radius R=0.9550m,thickness t= 0.015m, and total mass M= 3.565 kg?
  50. Physics

    If a space station must "provide one sixth the magnitude of the acceleration due to gravity on Earth" Can I use 9.81ms^-2/6 or is that too simple? Thanks.
  51. Physics

    What force is required to accelerate an object of 1.484x10^0 kg over a frictionless surface at -2.3580x10^0 m/s2 expressed to three significant figures.
  52. Physics

    A construction worker exerts 209N to move a load of bricks a distance of 10m across the parking lot,
  53. college physics

    Estimate the rotational kinetic energy of Earth, assuming it to be a solid sphere of uniform density.
  54. Physics

    Which of the following is an example of a baryon? a. meson b. electron c. lepton d. proton and neutron I saw a sight online that said A but on the notes my teacher had us copy it says D. It is d.
  55. physics

    An 87.0 kg fullback moving east with a speed of 5.0 m/s is tackled by a 83.0 kg opponent running west at 2.92 m/s, and the collision is perfectly inelastic.
  56. physics

    A loaded truck can accelerate at 3.2 m/s^2 It loses its load so that it is only 0.2 as massive. By what factor must the acceleration change for the same driving force?
  57. physics

    If Vx= 8.00 units and Vy= -6.40 unis, determine (a)the magnitude and (b)direction of ->V(vector) b) theta= ______ degrees below the positive x-axis.
  58. HELP PLEASE PHYSICS!!

    How much does it cost to operate a 100 W lamp continuously for 1 week if the power utility rate is 8/kWh? answer in $
  59. Physics

    Why would normal force be set to zero to calculate the minimum possible speed a rider can have at the top of a loop. Please i need help, this is due in few hours
  60. physics

    With what frequency would you have to push a child on a swing that had supporting chains that were 2.3 m long? Express your answer in Hz to 3 significant digits.
  61. 11 physics

    a20Kg box is suspended from the ceiling by arope that weighs 1Kg . find the tension at the top of the rope.
  62. physics

    A particle of mass 10 kg is slowly lifted up to a height of 10 metre then calculate the workdone by external and gravity force ?
  63. physics

    consider an electron near the equator. in which direction does it tend to deflect by the magnetic field of the earth if its velocity is directed a.northward
  64. Physics

    Rain drops hitting the side window of a car in motion often leave diagonal streaks if there is no wind. Why?
  65. Physics

    Where did the waste energy go to? A ball rolls off the ramp on the edge of a table heading downward and hits the ground.
  66. physics

    Two inelastic balls of masses 2 and 3 kg are moving at the velocities 8 and 4 m/s. Find the increase of the internal energy if the first ball catches up the second one.
  67. physics

    calculate the momentum ofa toy car weighing 200 gram and moving with a velocity of 5meter/second?
  68. Physics

    It takes you 9.5min to walk with an average velocity of 1m/s to the north from the bus stop to the museum entrance. What is your displacement?
  69. physics

    a long jump athlete take off at 25 degree with the horizontal and achieves a jumping distance of 9.12 m. Calculate initial take off speed.
  70. physics

    The pendulum swings past the pole 14 times in 21 seconds. The weight of the bob is 10g. Calculate the period?
  71. Physics

    A 26-lb. force vector that makes an angle of 101° counterclockwise from the -y direction. Determine the x and y components of the following three vectors in the xy plane.
  72. Physics Help

    An electron with velocity v = 2.4 × 106 m/s i encounters an electric field E = 1250 N/C i. How long will it take for the speed to be one fourth its original value?
  73. physics

    Five forces act on an object: (1) 60.0 N at 90°, (2) 40 N at 0°, (3) 80 N at 270°, (4) 40 N at 180°, (5) 50 N at 60°. What are the magnitude and direction of a sixth force that would produce equilibrium
  74. Physics 1

    A 1400 kg car traveling at a speed of 34 m/s skids to a halt on wet concrete where μk = 0.50. How long are the skid marks?
  75. PHYSICS

    A SPRING WITH A CONSTANT K = 8N/m IS STRETCHED 5CM AND RELEASED. IT BOBS UP AND DOWN EVERY 2.5 SECONDS. WHAT IS ITS FREQUENCY, PERIOD, ABD AMPLITUDE
  76. physics

    A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?
  77. physics

    What mass would you hang on the right side of the system in the figure to balance it -- that is, to make the clockwise and counterclockwise torques equal? (Let x1 = 30 cm and x2 = 12 cm.)
  78. Physics

    What power is needed to lift a 358 crate of bricks from the ground to the top of a 25.0 -high building in 1 minute?
  79. physics

    Peter Pan is suspended in space. He throws an entire jar of pixie dust to his left. Which way does he move?
  80. physics

    A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?
  81. physics

    A body moves with uniform acceleration with a distance x for 1st sec. What is relation b/w x & y? A) y=24x B) y=16x C) y=12x D) y=8x
  82. Physics

    A skydiver has an air resistance force of 1193 N and a mass of 94 kg, what is her current acceleration? Take down to be POSITIVE and use g = 10 m/s/s. Please report your units as "m/s/s"
  83. physics

    find the change in momentum of a car weighing 1500kg when its speed increases from 36km/h to 72km/h uniformly
  84. Physics

    What is the gravitational field strength at a place 220km above Earth's surface, the altitude of many piloted space flights?
  85. physics

    a jogger does 2.5 *10^5 of work during an exercise routine. her internal energy decreases by 6.8*x10^5. how much heat did she absorb or give off?
  86. physics

    A car traveling initially at 7.41 m/s accelerates at the rate of 0.752 m/s 2 for 2.74 s. What is its velocity at the end of the acceleration? Answer in units of m/s
  87. Physics

    A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration.
  88. physics

    A female gymnast weighs 200 N. If she is hanging stationary from a high bar,how many forces are acting on her? A. one B.five C.four D.two E.three WOuld it be choice A or D?
  89. PHYSICS

    What is the acceleration (in meters/second^2) of a freely falling 73.0 kg sky-diver, if air resistance exerts a force of 273 N?
  90. Physics B

    A car slows down from 23 m/s to rest in a distance of 85m. What is its constant acceleration? I got -6.224, but a friend was telling me it's -3.11 and that I had to divide by 2. Why is that?
  91. physics help please

    An airplane that can fly at 300 km/hr is flying at 210 when it is hit by a wind of 125 km/hr at 110. What is the new velocity of the plan?
  92. physics

    Find the time it would have taken a horse to run: displacement: +1609 m average acceleration: +0.0105 m/s^2 initial velocity: +16.58 m/s
  93. physics

    A loaded truck can accelerate at 6.4 m/s^2. It loses its load so that it is only 0.9 as massive. By what factor must the acceleration change for the same driving force?
  94. Physics

    A hiker shouts towards a vertical cliff 465 m away. The echo is heard 2.75 s. later. The wavelength of the sound is 0.750 m. What is its frequency?
  95. physics

    Charge polarization is normally produced by ____________________. A) nuclear interactions.B) contact.C) induction.D) friction.E) electrostatic means.
  96. physics

    What is the minimum work function for a metal for visible light (wavelengths between 400 and 700 ) to eject photoelectrons?
  97. physics

    The pulley in Figure P8.59 has a moment of inertia of 7.0 kg·m2 and a radius of 0.50 m. The cord supporting the masses m1 and m2 does not slip, and the axle is frictionless.
  98. physics

    A pendulum has a mass of 3.6 kg, a length of 2.1 meters, and swings through a (half)arc of 26.2 degrees. What is its amplitude to the nearest centimeter?
  99. Maths, physics, chemistry,

    The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g
  100. physics

    a car travelling at 60km/h uniformly retards for 10s and reaches a velocity of 45km/h. find the retardation.