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A 0.700-kg ball is on the end of a rope that is 1.30 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical as shown. What is the tangential speed of the ball?
A luminous object 3.0 mm high is placed 200 mm from a convex mirror of radius of curvature 200 mm. Show that the (negative) image distance can be computed using a focal length of -100mm. Compute the image size?
In gaseous sodium chloride, chloride ions have one more electron than they have protons, What is the magnitude of the electrostatic force the molecule exerts on it
A silicon solar cell looks like a battery with a 0.33Vterminal voltage. What is the solar cell's efficiency-that is, what percentage of the energy incident on the cell is converted to electric energy
To make ice, a freezer that is a reverse Carnot engine extracts 50 kJ as heat at -15°C during each cycle, How much work per cycle is required to run the freezer
A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 3.00 10-23 kg·m/s from 1.30 10-23 kg·m/s in a time of 6.80 10-6 s. What is the magnitude of the electric field?
avocados and peaches are equally priced in SA. If consumers in both states maximize utility (and have identical preferences),
Nichrome wire of cross-sectional radius 0.758 mm is to be used in winding a heating coil. find the length of wire you must use to wind the coil
assume that you are a Haitian taptap driverand want a more comfortable ride. You decide to replace the springswith new springs that can handle the typical heavy load on yourvehicle. What spring constant do you want your new spring system to have.
An electric dipole consisting of charges of magnitude 1.90 nC separated by 7.00 µm is in an electric field of strength 1190 N/C, find the difference between the potential energies for dipole orientations parallel
A certain camera has f-numbers that range from 1.1 to 28. If the focal length of the lens is 40 mm, what is the range of aperture diameters for the camera
In a physics lab, a cube slides down a frictionless incline and elastically strikes another cube at the bottom that is only 1/4 its mass. If the incline is 35 high and the table is 95 off the floor, where does each cube land.
They stick together after the collision and are going 10 m/s after the collision. If they skid for 6seconds before stopping, how far did they skid?
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