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  1. M

    Isomerization of dimethyl maleate to dimethyl fumarate

    Homework Statement Propose the mechanism through which dimethyl maleate convert to dimethyl fumarate. The Attempt at a Solution I think free radical bromination reaction plays a role here, but I'm not sure how. We first get two bromine radicals, one of which attacks the double bond in...
  2. M

    Integration word problem

    Homework Statement In a West Texas school district the school year began on August 1 and lasted until May 31. On August 1 a Soft Drink company in- stalled soda machines in the school cafeteria. It found that after t months the machines generated income at a rate of f(t) = 500t/ (5t^2 +...
  3. M

    Hemoglobin binding

    Homework Statement I was given the oxygen binding curves for human and crocodile hemoglobins, with the crocodile having a higher affinity for oxygen at p50. My questions are, 1) Crodocile hemoglobin does not bind BPG. Instead, deoxyhemoglobin preferentially binds to HCO3-. How does...
  4. M

    Hemoglobin binding

    I was given the oxygen binding curves for human and crocodile hemoglobins, with the crocodile having a higher affinity for oxygen at p50. My questions are, 1) Crodocile hemoglobin does not bind BPG. Instead, deoxyhemoglobin preferentially binds to HCO3-. How does bicarbonate binding affect...
  5. M

    Area between a function and its tangent

    Homework Statement Find the area of the region bounded by the graph of f(x) = 4x^2, the tangent line to this graph at P(2, f(2)), and the x-axis Homework Equations Integral of [f(x)-g(x) dx] The Attempt at a Solution I first tried to find the equation for the tangent line The...
  6. M

    Area between two curves

    Homework Statement Compute the area between the graphs of f(x) = 8sin(2x) and g(x) = 5sin(x)+3sin(2x) on the interval [0,pi/2] Homework Equations Area = Integral of [f(x)-g(x)]dx The Attempt at a Solution I first did f(x) - g(x) = 5sin(2x)-5sin(x)...after integrating, I got...
  7. M

    Simple Harmonic Motion

    When there is not air resistance, potential energy is completely transformed into kinetic energy with each successive period. However, when air resistance is present, a fraction of the energy is lost and cannot be converted into kinetic energy.
  8. M

    Simple Harmonic Motion

    Homework Statement I'm given the position vs. time, velocity vs. time, acceleration vs. time, and energy vs. time graphs for a simple harmonic motion, and I want to know what would happen to those graphs if air resistance is included? Homework Equations N/A The Attempt at a Solution...
  9. M

    Newton's Second Law of Rotation

    Homework Statement We have a rigid bar (length L) with an axis of rotation through the center of the bar. The bar is attached to a pulley with radius Rp at the axis of rotation. Two lead weights (mass M) can be screwed on the bar at equal distances R from the axis of the pulley. In each trial...
  10. M

    Angular frequency

    Homework Statement A uniform disk of radius 1.4m and mass 2.6kg is suspended from a pivot 0.35m above its center of mass. Find the angular frequency w for small oscillations. Homework Equations w = 2 x pi x f = sqrt (k/m) The Attempt at a Solution Is this the equation I would...
  11. M

    Amplitude of spring

    I got the answer. :)
  12. M

    Amplitude of spring

    Homework Statement A block of mass 0.28kg is attached to a spring of spring constant 12N/m on a frictionless track. The block moves in simple harmonic motion with amplitude 0.2m. While passing through the equilibrium point from left to right, the block is struck by a bullet, which stops...
  13. M

    Angular Momentum of a conical pendulum

    Homework Statement A small metallic bob is suspended from the ceiling by a thread of negligible mass. The ball is then set in motion in a horizontal circle so that the thread describes a cone. Given: Length of string = 2.8m Angle between string and vertical: 21 degrees...
  14. M

    Rolling/Angular Momentum

    but how do you find the moment of inertia for the putty? is it just MR^2?
  15. M

    Rotational motion of a uniform solid disk

    I got the answer; there was something wrong with my calculation. Thank you for your help! :)
  16. M

    Object rolling down an incline

    Homework Statement A solid sphere of radius 20cm is positioned at the top of an incline that makes 22 degrees angle with the horizontal. This initial position of the sphere is a vertical distance 1.8m above its position when at the bottom of the incline. Moment of inertia of a sphere with...
  17. M

    Diving board question

    Note: The length from A to B is 1.2m, and from B to O is 3.9
  18. M

    Diving board question

    Homework Statement The diving board shown in figure has a mass of 35kg. O = 65kg diver [1.2m] [3.9m] O -------------------- l l A B A) Find the magnitude of the force on the support A when a 65kg diver stands at the end of the diving board. B) Find the...
  19. M

    Torque on a cylindrical rod

    yes just rotational KE
  20. M

    Torque on a cylindrical rod

    So if I were to find the angular speed of the system at that point, would I just do Rotational Kinetic energy = 1/2 Iw^2, where I = 1/3ML^2 + 2/5MR^2 + (L+R)^2?
  21. M

    Torque on a cylindrical rod

    Thank you so much! I got it.
  22. M

    Rotational motion of a uniform solid disk

    I got the speed of the center of mass. Now I just need to somehow link that to the speed of the lowest point.
  23. M

    Rotational motion of a uniform solid disk

    Homework Statement A uniform solid disk of radius 7.1m and mass 30.3kg is free to rotate on a fricionless pivot through a point on its rim. [picture: http://www.wellesley.edu/Physics/phyllisflemingphysics/107_p_angular_images/figure_9.gif] [Broken] If the disk is released from rest in the...
  24. M

    Torque on a cylindrical rod

    Homework Statement A cylindrical rod 36.4 cm long has mass 0.655kg and radius 1.1cm. A 18.5kg ball of diameter 11.4cm is attached to one end. The arrangement is originally vertical with the ball at the top and is free to pivot about the other end. After the ball-rod system falls a quarter...
  25. M

    Superposition of moments of Inertia

    I think it's just connected end to end.
  26. M

    Superposition of moments of Inertia

    because I thought that the radius 1/6L has to be added onto the length of the rod...
  27. M

    Superposition of moments of Inertia

    Homework Statement Consider a thin rod of length L which is pivoted at one end. A uniform density spherical object (whose mass is m and radius is r = 1/6L) is attached to the free end of the rod. The moment of inertia of the rod about an end if I = 1/3 mL^2. The moment of inertia of the...
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