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Q. Two identical spheres, each of mass M and negligible radius, are fastened to opposite ends of a rod of negligible mass and length 2l. this system is initially at rest with the rod horizontal, and is free to rotate about a frictionless, horizontal axis through the center of the rod and perpendicular to the plane of the page. a bug, of mas 3M, lands gently on the sphere on the left. assume that the size of the bug is small compared to the length of the rod. express your answers to all ports of the question in terms of M, l, and physical constants. a. determine the torque about the axis immediately after the bug lands on the sphere.b. determine the angular acceleration of the bug immediately after the but lands.The rod-spheres-bug system swings about the axis. at the instant that the rod is vertical,as shown above, determine each of the following.c. the angular speed of the bugd. the angular momentum of the systeme. the magnitude and direction of the force that must be exerted on the bug by the sphere to keep the bug from being thrown off the sphere.
A pump, submerged at the bottom of a well that is 35m deep, is used to pump water uphill to a house that is 50m above the top of the well, as shown above. The density of the water is 1000 kg/m3. All pressures are gauge pressures. Top of well pipe to ..
An 82 kg parachutist descends through a vertical height of 350 m with constant speed. Find out the increase in entropy produced by the parachutist; assume the air temperature is 21 degrees C.
A 2.6k and a 1.8k resistor are connected in parallel and this combination is connected in series with a 1.8k resistor. If each resistor is rated at 1/2W, what is the maximum voltage that can be applied across the whole network.
A 270 m wide river flows due east at a uniform speed of 2.30 m/s. A boat with the speed of 8.4 m/s relative to water leaves the south bank pointed in a direction 38o west of north. What is (a) magnitude and (b) direction of the boat's velocity rel..
What approximations or simplifying assumptions must you make in the calculations? (Note: Some of these choices are false because they are wrong physics!)
The flywheel of an engine has a moment of inertia 2.80 {rm kg} cdot {rm m} ^ {2} about its rotation axis. What is its final kinetic energy.
Polymer diffusion and Calibration of an optical tweezer
What are sunspots and how are they related to the Sun's magnetic field? Is the magnetic field stronger weaker in sunspots? How does the temperature in a sunspot relate to the temperature in the rest of the photosphere.
Evaluate the stability of of Na in the NaCl structure
A cube of ice is taken from the freezer at -9.4°C and placed in a 94 g aluminium calorimeter filled with 315 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of ice cube.
What is an average speed
Smoke particles in the air typically have masses of the order of 10 to 16 kg. The Brownian motion (rapid, irregular movement) of these particles, resulting from collisions with air molecules, can be observed with microscope.
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