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  • Help with physics?

    Your answer: 
    Three rods, each of length L = 46.1 cm and mass m = 0.355 kg, are welded perpendicular to one another, as shown in the figure. Find the rotational inertia (in kg m^2) about the axis shown in the figure.
    49 mins ago
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  • Help with physics?

    Your answer: 
    A thin ring of mass M = 2.27 kg and radius R = 0.382m is welded to a thin rod of mass m = 1.16 kg and length L = 0.814 m. The system rotates about an axis perpendicular to the page and through point P. Find the rotational inertia of the system (in kg m^2) about the axis.
    51 mins ago
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  • Help with physics?

    Your answer: 
    In the figure, block 1 slides along an x axis on a frictionless floor with a speed of 1.11 m/s. When it reaches stationary block 2, the two blocks undergo an elastic collision. Block 1 has mass 0.317 kg and at t = 0 its center is at x = -1.50m. Block 2 has mass 0.475 kg at t = 0 its center is at x = 0m. Where is the center of mass(in m) of the two... show more
    2 hours ago
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  • Help with physics problem?

    Your answer: 
    As shown in the figure, a climber with a weight of 619N is held by a belay rope connected top her harness. The force of the rope on her has line of action through her center of mass. The angles shown are theta = 55.9 degrees and phi = 25 degrees. If her feet do not slide on the vertical wall, what must the minimum possible coefficient of static... show more
    2 hours ago
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  • Help with physics problem? Best answer gets 10 points?

    Your answer: 
    A thin, uniform block is in the shape of an isosceles right triangle. The lengths of the two equal sides are each L = 38.8 cm, as shown in the figure. Let the origin be the bottom left corner of the triangle. Find the x-coordinate(in cm) of the center of mass of the block. (Hint: Break the block into vertical strips at position x with height y and... show more
    2 hours ago
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  • Calculate the maximum displacement, h, in centimeters, above the equilibrium position, that the monkey reaches? PHYSICS HELP PLEASE?

    Your answer: 
    A toy consists of a m=39 g monkey suspended from a spring of spring constant k. When the toy monkey is first hung on the spring and the system reaches equilibrium, the spring has stretched a distance of x = 11.6 cm, as shown in the diagram. This toy is so adorable you pull the monkey down an additional d = 5.9 cm from equilibrium and release it from... show more
    7 hours ago
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  • How can we use knowledge of our being inside a simulation to hack the system?

    Your answer: 
    Can the program hack itself? Are drugs already a hack?! Or maybe just a cheat code? But how can we hack it for the ability to gain knowledge/abilities instantly?
    7 hours ago
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  • Why are laws in physics and theorems in math named for the discoverer instead of for their content?

    Your answer: 
    A student or non-scientist would have an easier time with physics and math if laws had descriptive names. Pythagorean theorem = right triangle thm Maxwell's equations = electromagnetic equ Schrodinger's equation = quantum wave equ At least the name could include both: Heisenberg uncertainty principle Newton's laws of motion
    7 hours ago
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  • What if the Earth's sun suddenly turns into a nacho cheesecake?

    Your answer: 
    What if at midnight at December 31, 2000, the Earth's sun suddenly turned into a nacho cheesecake?
    8 hours ago
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  • Physics question please help!!?

    Your answer: 
    A horizontal spring, with a force constant of 39 N/m, is compressed 12.4 cm, and placed between a wall and a 0.17-kg box resting on a smooth floor. If the spring is released, the maximum speed of the box is? ans : 1.9 m/s
    8 hours ago
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  • What s a material that is transparent from one side but looks solid from the other?

    Your answer: 
    Kind of like two way glass or mirrors but without the reflection on the side that can t see through. Transparent on one side, not on the other.
    8 hours ago
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  • Help with physics/energy problem?

    Your answer: 
    A child throws a 0.50 kg snowball at his friend at 12.0 m/s but the snowball lands on the ground in front of his friend.The snowball is 1.3 m above the ground when it leaves the child’s hand. (a) What is the (i) kinetic energy & (ii) potential energy of the snowball at the time of release? (b) What is the total energy of the snowball (i) at the... show more
    8 hours ago
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  • Help with energy/work problem?

    Your answer: 
    A toboggan carrying two children (total mass = 85 kg) reaches its maximum speed at the bottom of a hill, and then glides to a stop in 21 m along a horizontal surface. The coefficient of kinetic friction between the toboggan and the snowy surface is 0.11. (a) Calculate the acceleration of the toboggan. (b) Calculate the work done on the toboggan by... show more
    8 hours ago
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  • Need help with a physics problem?

    Your answer: 
    Assume that the alveolar ducts of the lungs are tubes with diameter, d=0.4mm. The total effective cross-sectional area of the alveolar ducts is 5880cm^2; the trachea has a diameter of 18mm; and a flow rate of 500 cm^3 per 2.5 s is assumed. a) Calculate the velocity of air in the alveolar ducts. b) What is the air velocity in the trachea?
    9 hours ago
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