1. Physics

    An object whose mass is unknown is held by two rigid rods. The whole system is at rest. The angle between the vertical direction and the left rod from point A to B is 60 degrees. The angle between the vertical direction and the right rod from point C to D
  2. physics

    Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. The length of each rod is 0.85 m, and the mass of each is 0.077 kg. One rod is held in place above the ground, while the other
  3. physica

    Consider the rods plus disc system shown in the Figure. The rods are identical. They have a length L =0.50 m, and mass M = 0.250kg. The disc has a radius of R = 0.130m and mass m=0.750kg. Both rods are glued to the disk as shown with X = 0.25m. The system
  4. Physics

    An object consists of 5 masses, each of mass m, connected by massless rods. The two short rods have length L and the two long rods have length 2L. What is the moment of inertia about an axis perpendicular to the diagram (out of the page) and through the
  5. Physics

    The rigid object shown in Fig. 10-63 consists of three balls and three connecting rods, with M = 1.5 kg, L = 0.67 m, and θ = 32°. The balls may be treated as particles, and the connecting rods have negligible mass. Determine the rotational kinetic
  6. PHYSICS

    Two parallel METAL rods form a plane inclined at 20.0° to the horizontal. The upper end of the rods are connected together by a resistor of 118.0 Ω. The lower end of the rods are held in an ELECTRICALLY INSULATING block. They are separated
  7. Physics

    The rigid object shown in Fig. 10-63 consists of three balls and three connecting rods, with M = 1.5 kg, L = 0.67 m, and θ = 32°. Fig. 10-63 The balls may be treated as particles, and the connecting rods have negligible mass. Determine the rotational
  8. Physics

    Three masses are connected by massless rigid rods. Rods AC and CB have length l= 16.6 cm. If massA=115.0 g, massB=206.0 g, and massC=310.0 g, what are the coordinates of the center of mass? (Enter your answer for the x coordinate first, followed by the y
  9. Physics HELP!!

    Three masses are connected by massless rigid rods. Rods AC and CB have length l= 44.8cm. If massA=280.0g, massB=386.0g, and massC=739.0g, what are the coordinates of the center of mass? (Enter your answer for the x coordinate first, followed by the y
  10. Physics

    A 2.285 kg object is held in place on an inclined plane that makes an angle of 40 degrees with the horizontal. The coefficient of static friction between the plan and the object is 0.552. A second object that has a mass of 4.75 kg is connected to the first
  11. physics

    Suppose you need to measure the mass of an object, but have only a 7-kg standard mass and a meter stick. Place a knife edge under the 50-cm mark of the meter stick. Then put the 7-kg standard mass at the 39.1-cm mark and place the object so as to balance
  12. physics

    Three uniform thin rods, each of length L = 16 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 50 g. Where is the center of mass of the assembly (x, y)?
  13. Physics

    Three uniform thin rods, each of length L = 16 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 50 g. Where is the center of mass of the assembly (x, y)?
  14. physics

    three uniform thin rods, each of length L = 16 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 50 g. Where is the center of mass of the assembly (x, y)?
  15. phy 231

    An object of mass m1=3.3 kg moving at 4.7 m/s strikes a stationary second object of unknown mass. After an elastic collision, the first object is observed moving at 3.76 m/s at an angle of -41° with respect to the original line of motion. What is the
  16. chemistry

    A sample of neon gas is held in a rigid 2.284L container with a pressure of 1.036 atm at 24.3°C. 4.093g of an unknown cold gas is added to the container. The temperature drops to 20.3°C, but the pressure rises to 1.960atm. What is the molar mass of the
  17. physics

    The ends of the two rods shown in the figure are separated by 2.97 mm at 24.3 °C. The left-hand rod is brass and 1.21 m long; the right-hand rod is steel and 1.21 m long. Assuming that the outside ends of both rods rest firmly against rigid supports, at
  18. physics

    The ends of the two rods shown in the figure are separated by 2.97 mm at 24.3 °C. The left-hand rod is brass and 1.21 m long; the right-hand rod is steel and 1.21 m long. Assuming that the outside ends of both rods rest firmly against rigid supports, at
  19. physics

    The ends of the two rods shown in the figure are separated by 2.97 mm at 24.3 °C. The left-hand rod is brass and 1.21 m long; the right-hand rod is steel and 1.21 m long. Assuming that the outside ends of both rods rest firmly against rigid supports, at
  20. physics please helpp

    The ends of the two rods shown in the figure are separated by 2.97 mm at 24.3 °C. The left-hand rod is brass and 1.21 m long; the right-hand rod is steel and 1.21 m long. Assuming that the outside ends of both rods rest firmly against rigid supports, at
  21. Physics !>:(

    Four masses are connected by 27.1cm long, massless, rigid rods. If massA=237.0g, massB=511.0g, massC=257.0g, and massD=517.0g, what are the coordinates of the center of mass if the origin is located at mass A? (Enter your x coordinate first followed by the
  22. physics

    . 0.30m ....|______|_________________________ ....|...../\ ...|_| <-- box with unknown mass In the figure, the meterstick's mass is 0.200 kg and the string tension is 2.50 N . The system is in equilibrium. Find the (a) unknown mass m and (b) the upward
  23. Physics Urgent

    A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves
  24. Physics Urgent

    A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves
  25. Physic

    ON is the vertical plumb line.A horizontal force F applies at M to push the piston at O and N,with the help of rods MO,MN.The rods MO,MN have the same length,when the distance of ON is 200cm,the distance of M to the plumb line ON is 10cm.Assuming the
  26. Physics HELP!!

    Four masses are connected by 27.1cm long, massless, rigid rods. If massA=237.0g, massB=511.0g, massC=257.0g, and massD=517.0g, what are the coordinates of the center of mass if the origin is located at mass A? ^ I already got this part: x coordinate- 13.78
  27. physics

    A frictionless massless pulley has 7 kg tied to a cable on the left side and an unknown mass (M) on the right. The unknown mass accelerates downward at 6.6 m/s2 What is the accelerationof the system/tension of the rope
  28. Physics

    A object-spring system oscillates with an amplitude of 4.0 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, determine each of the following values. (a) the mechanical energy of the system (b) the maximum speed of the object (c) the
  29. Physics

    A object-spring system oscillates with an amplitude of 4.0 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, determine each of the following values. (a) the mechanical energy of the system J (b) the maximum speed of the object m/s (c)
  30. Physics

    Consider the rods plus disc system shown in the Figure. The rod has a length L =0.50 m, and mass M = 0.270kg. The large disc has a radius of R = 0.130m and mass m=0.810kg. The second disk should be treated as a point mass of 0.405kg. It is glued to the rod
  31. Physics

    Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions and collide longitudinally. The collision is perfectly elastic and the rods swap their velocities. How long does the collision last in seconds if the length of the rods
  32. heeeeeeeelp physics

    Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions and collide longitudinally.The collision is perfectly elastic and the rods swap their velocities. How long does the collision last in seconds if the length of the rods
  33. Physics

    A mobile consists of two very lightweight rods of length l = 0.400 m connected to each other and the ceiling by vertical strings. (Neglect the masses of the rods and strings.) Three objects are suspended by strings from the rods. The masses of objects 1
  34. physics

    An object of an unknown mass is attached to an ideal spring with force constant 120 N/m and is found to vibrate with a frequency of 6.00 Hz. Find (a) the period, (b) the angular frequency, and (c) the mass of this object.
  35. Science

    Please help !!! A student wanted to determine the density of an object made of an unknown substance. She found the mass of the object was 335g. Then she did water displacement to determine the objects volume. The initial volume of the water was 50.0 mL.
  36. Physics

    A) An object with mass M=10kg is held on a incline. The object and the incline surfaces have a static friction coefficient of 0.3. What is the maximum angle at which the object starts moving? B) Again, suppose that the force in A) is a push applied
  37. physics

    Four objects are held in position at the corners of a rectangle by light rods . m1 2.90(kg) m2 1.90(kg) m3 4.50(kg) m41.90 (kg) (a) Find the moment of inertia of the system about the x-axis. Answer in kg · m2 (b) Find the moment of inertia of the system
  38. Physics

    The four masses shown in the figure below are connected by massless, rigid rods. moi-cog-problem-fig (a) Find the coordinates of the center of gravity of this object if MA = 120 g and MB = MC = MD = 180 g x = ? m y = ? m (b) Find the moment of inertia
  39. physics

    A 3.0-kg object moving 8.0 m/s in the positive x direction has a one-dimensional elastic collision with an object (mass = M) initially at rest. After the collision the object of unknown mass has a velocity of 6.0 m/s in the positive x direction. What is M?
  40. physics helpdifficult

    i want the answer just don't leave it upon me just giving the process..................................................................................................Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions
  41. Physics

    Object A has mass mA = 9 kg and initial momentum A,i = < 19, -7, 0 > kg · m/s, just before it strikes object B, which has mass mB = 12 kg. Just before the collision object B has initial momentum B,i = < 5, 6, 0 > kg · m/s. Consider a system
  42. physics

    The center of mass and the moment of inertia of a 2D rigid body A 2D rigid body shown in the figure-2 has constant density ρ kg/m2. It is a thin circular disc of radius R centered at point P that contains a circular cavity centered at point Q. The
  43. Dynamics of Rigid Bodies

    The system of blocks A and B and two pulleys C and D is assembled as shown in the figure. Neglecting friction in and the mass of the pulleys, and assuming that the whole system is initially at rest, determine the acceleration of block A. The coefficient of
  44. Math

    Kenji has a box containing many blue rods, each one 252 cm long. Mei-Ling has a box containing many green rods, each one 408 cm long. They each start making a long line of rods of their colour by laying rods end to end. After a while, their lines are
  45. Science Maths

    Sir, My question is as below:- Three particles a b & c of mass m are connected to each other by three massless rigid rods to from a rigid, equilateral triangular body of side 'l'.This body is is placed on a horizontal frictionless table (x-y plane) an is
  46. physics

    A .524kg object is tied down to the bottom of a container which container an unknown fluid. the tension in the rope is 38.5N. the object displaces .00735m3 of unknown fluid. Find the density of the unknown fluid.
  47. chemistry

    Dissolve 1.5g of an unknown salt into 37g of water and find that the new vapor pressure at 75C is 277 torr. What is the Molar Mass of the unknown? How many grams of the unknown would have to be used in 100ml of water to make a 11.5% solution by mass of the
  48. physics

    Three objects lie in the x, y plane. Each rotates about the z axis with an angular speed of 4.44 rad/s. The mass m of each object and its perpendicular distance r from the z axis are as follows: (1) m1 = 6.00 kg and r1 = 1.00 m, (2) m2 = 4.50 kg and r2 =
  49. Physics

    There is a net net torque that is applied to a rigid object. What happens? a. the angular momentum of the object will change b. the kinetic energy of the object will change c. the object will experience an angular acceleration d. the rotational inertia of
  50. Physics

    An object of mass 1.00 kg is attached to a vertical spring with spring constant 100 N/m. The object is held at rest in a position such that the spring is stretched upward a distance 1.00 cm beyond its undisturbed length. If the object is released, how far
  51. physics

    Four masses are arranged as shown. They are connected by rigid, massless rods of lengths 0.50 m and d = 0.73 m. What torque must be applied to cause an angular acceleration of 0.63 rad/s2 about the axis shown? 4 kg 3 kg 5 kg 2 kg
  52. Physics

    An object of mass m1 is placed on an inclined plane (angle theta above the horizontal) is connected by a string going over a pulley to a hanging object of mass m2. Determine the acceleration of the system if there is no friction between object 1 and the
  53. physics

    an object of mass m = 2,113 g held by a massless string on a frictionless inclined surface. What is the magnitude of the force that the surface exerts on the object if θ = 52 degrees ?
  54. Physics

    A mixing beater consists of three thin rods, each 10.9 cm long. The rods diverge from a central hub, separated from each other by 120°, and all turn in the same plane. A ball is attached to the end of each rod. Each ball has cross-sectional area 3.70 cm2
  55. Please help w/ Algebra

    A rectangular field has a perimeter of 56 rods. If a strip 2 rods wide is cut from all sides of the field, the remaining part of the field has an area of 91 rods. Find the dimensions of the field.
  56. physics

    One object is at rest and another is moving. The two collide in a one-dimensional, completely inelastic collision. In other words, they stick together and move off with shared velocity. The speed of the object that is moving initially is 25 m/s. The masses
  57. physics

    The L-shaped object in the figure below consists of three masses (m1 = 8.90 kg, m2 = 1.16 kg and m3 = 2.40 kg) connected by light rods of length L1 = 1.29 m and L2 = 1.86 m.What torque must be applied to this object to give it an angular acceleration of
  58. Physics

    A governor (centrifugal pendulum) consists of two 200–g spheres attached by light, rigid 10.0–cm rods to a vertical rotating axle. The rods are hinged so that the spheres swing out from the axle as they rotate with it. However, when the angle θ is
  59. PHYSICS

    Not sure how to set this one up. An object of unknown mass receives a 25 Newton force and accelerates at a rate of 0.55 m/s^2. What is its mass in kilograms?
  60. Physics

    Let's model an airplane propeller as 4, 0.25 m long thin rods of mass 0.040 kg. Calculate the moment of inertia of the propeller assuming they each rotate about an axis at the end. Hint: Treat the blades as long uniform rods.
  61. Physics

    Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. What is the total momentum of the system? (should I
  62. Arlington

    what part of a yard is 1 1/2ft? What part of a mile is 1 rod? 1 rod is 320 rods. What part of a mile is 40 rods? 80 rods? 160 rods?
  63. Physics

    A object-spring system oscillates with an amplitude of 3.8 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, find the maximum speed of the object. I already have the mechanical energy of the system. How do I find the maximum speed?
  64. Physics

    A mass of 1.0 kg is located at the end of a very light and rigid rod 44 cm in length. The rod is rotating about an axis at its opposite end with a rotational velocity of 3 rad/s. (a) What is the rotational inertia of the system? kg · m2 (b) What is the
  65. Physics(please help)

    Four very thin rods, each 8.3 m long, are joined to form a square. The center of mass of the square is located at the coordinate origin. The rod on the right is then removed. What are the x- and y-coordinates of the center of mass of the remaining
  66. Physic (concepts-please check my thoughts)

    A net torque applied to a rigid object always tends to produce? a)translational acceleration b) rotational equilibrium c) rotational acceleration d) rotational inertia e) none of these work (c) Torque produces torsion and tends to produce rotation. The net
  67. earth

    Suppose that an object on Earth has a known mass of 80 kgs. Will the mass of that object be less than, more than, or the same as on the other planets in our solar system? Explain your answer.
  68. Physics

    A 2.00-kg object is hanging on a 1.1m string. The object is pulled 20cm away from the equilibrium position and held there. a) What is the pulling force in the string when the object is kept still ? b) Now the object is released, what is the speed of the
  69. Science-8th Grade

    5. Volume is an object is how much ________ it takes up. 6. When we measure the temperature of an object in the metric system, we use _______ 7. Scientist say that measuring mass of an object means measuring how much matter something has. What is matter?
  70. Physics

    In a pulley system, can the force of friction equal the tension in the rope? Let's say there is a mass on a table connected to a pulley system (placed at the corner of the table), while the other mass hangs from the table ... can the force of friction
  71. chemistry

    can you tell me what i did wrong on this problem Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s. 4kg,y=3.00m 2kg,y=-2.00m 3kg,y=-4.00m a)Find the total
  72. Physics I Newton's 2nd Law

    I need help! I cannot seem to figure out what I will need to do for my final tomorrow. I will be given a mass of a glider and an acceleration. Another mass (my unknown) will be tied to a string to the glider and will graphically give me my acceleration.
  73. physics(check my answer)

    can you tell me what i did wrong on this problem Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s. 4kg,y=3.00m 2kg,y=-2.00m 3kg,y=-4.00m a)Find the total
  74. Chemistry

    Mass of unknown solution=25.671 Mass ethanol =8.243 Assuming that prior experiments have shown the single-step extraction removes only 72.0 % of the ethanol, the mass of ethanol in your original unknown is 11.45 Mass percent ethanol =44.6 % Given a density
  75. physics.......please help!!!

    In which of the situations listed below is energy being transferred as heat to the system in order for the system to do work? In which situation is work being done on the system in order for energy to be transferred from the system as heat? a. Two sticks
  76. Physics 203 ( College)

    Four particles, one at each of the four corners of a square with 2.5-m-long edges, are connected by mass less rods. The masses of the particles are m1 = m3 = 2.0 kg and m2 = m4 = 7.0 kg. Find the moment of inertia of the system about the z axis.
  77. Physics

    An interacting system of two objects has no external force acting on the system. The first has a mass of 2.00kg and is moving with a velocity (2.00m/s)i + (1.00m/s)j at time t=0s. The second object has a mass of 3.00kg and is moving with a velocity
  78. Physics

    Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. The work done on object A is 500J. After the force pulled each object, object A moves twice as fast as object B. Answer the
  79. physics

    A block of mass m = 1.02 kg is suspended above the ground at a height h = 14.4 m by a spool with two arms. The spool-with- arms arrangement is a combination of a solid uniform cylinder of mass M = 3.43 kg and radius R = 0.440 m, and two rods, each of
  80. physics

    An unknown object with mass M slides on a smooth frictionless surface with a speed of 35.0 m/s along the x-axis. Suddenly it explodes into two pieces, P and Q, which move in different directions as shown in the figure below. Determine the final velocity of
  81. Vectors

    An object on a ramp is being held in place by a rope attached to the top of the ramp. If the tension in the rope is 215 N, what is the mass of the object.
  82. Physics

    A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of
  83. Phys

    A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of
  84. Physics

    A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of
  85. Physics

    A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of
  86. Physics

    Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.0 kg and an initial velocity of VoA = 8.15 m/s, due east. Object B,
  87. Physics(Rotational Energy)

    Suppose three masses are arranged as shown, connected by a rodless mass. (2 kg)-------(6 kg)--------(4 kg) 2m 3m a) If this object is free to rotate in space, about what point will it spin? b) A small mass (m=0.1 kg) drops vertically onto the2 kg mass
  88. phy

    Review. An object with a mass of m 5 5.10 kg is attached to the free end of a light string wrapped around a reel of radius R 5 0.250 m and mass M 5 3.00 kg. The reel is a solid disk, free to rotate in a vertical plane about the horizontal axis passing
  89. Physics

    Toy 1, which has a mass of 2 kg, is moving to the right at 3 m/s, and Toy 2, whose mass is unknown, is moving to the left at 3 m/s. After the two toys collide, each object's speed is 3 m/s. What could be Toy 2's mass (choose 2 answers)? A. 1 kg B. 3 kg C.
  90. PHYSICS

    Particles 1 and 2, each of mass m, are attached to the ends of a rigid massless rod of length L1 + L2, with L1 = 19 cm and L2 = 75 cm. The rod is held horizontally on the fulcrum and then released. What is the magnitude of the initial acceleration of
  91. Algebra

    Rod and reel inc. manufactures and sells fishing rods. The company uses the equation P= 25r - 12,500 to estimate its profit P on the sale on the fishing rods. How many fishing rods were sold if the company made a profit of 125,000? Please help. Thank you
  92. physics

    An object of mass 5.00 kg is attached to a spring with a force constant of 300 N/m. It is oscillating on a horizontal frictionless surface with an amplitude of 2.00 m. A 8.00 kg object is dropped vertically on top of the 5.00 kg object as it passes through
  93. Physics

    A massless string runs around two massless, frictionless pulleys, where one pulley is attached to the ceiling, and the other is suspended with a mass m. An object with mass m = 17 kg hangs from one pulley. A force F is exerted on the free end of the string
  94. Physics

    A solid circular disk has a mass of 1.67 kg and a radius of 0.144 m. Each of three identical thin rods has a mass of 0.351 kg. The rods are attached perpendicularly to the plane of the disk at its outer edge to form a three-legged stool (see the figure).
  95. Physics Fluids

    When a crown of mass 14.7 kg is submerged in water, an accurate scale reads only 13.4 kg. Is the crown made of real gold? Ok How do I do this problem I set up my free body diagram Net Force = ma = 0= Ft + Fb - Fg were Ft is the force of tension on the
  96. Physics

    Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.9 kg and an initial velocity of = 8.82 m/s, due east. Object B,
  97. physics

    Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.5 kg and an initial velocity of = 8.50 m/s, due east. Object B,
  98. Chemistry

    Since the unkown acid is monoprotic, this also equals the number of moles of acid to use. A typical molar mass for an unknown acid in this experiment is 380 g/mol. Using this molar mass, calculate the mass (in grams) of unknown acid you should use per
  99. Physics - KE/Inertia

    The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm)consists of
  100. Physics

    An unknown mass is suspended by a string from one end of an uniform stick which has a mass of 120 g. In order to balance the stick, it must be supported one third of its length away from the mass. the unknown mass is therefore?