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A 25 gram ball is fired horizontally into a 0.375 Kg catcher arm at rest. The catcher arm and ball system swings up to a height of 2 cm. How fast was the ball traveling before the impact occurred?
A model of a red blood cell portrays the cell as a spherical capacitor a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t. Estimate the capacitance of the cell
A roller-coaster car has a mass of 504 kg when fully loaded with passengers Point B of the rollercoaster has a radius of 15.0m, What is the maximum speed the vehicle can have
The electron in a hydrogen atom is in the first excited state, What is the quantum number n of the state into which the electron moves
A helicopter has two blades, each of which has a mass of 270 kg and can be approximated as a thin rod of length 6.7 m. The blades are rotating at an angular speed of 54 rad/s. (a) What is the total moment of inertia of the two blades about the axis o..
A projectile is launched from a cannon at ground level at an angle of 62.0 degrees elevation and has a muzzle velocity of 481 m/s. Explain how many seconds after it is fired does it reach max height?
what is the available energy content, in joules, of a battery that opperates a 2.00 w electric clock for 18 months
A 2.0 ? resistor is connected across a 6.0 V power supply. An ammeter with internal resistance of 1.0 ? is used to measure the current in this circuit. What is the ammeter reading
A long, solid insulating cylinder of radius R = 1 mm has a uniform volume charge density and a total linear charge density of lambda = 3.6X10^9 C/m. what is its speed just before it impacts the surface
A VW Beetle goes from 0 to 95.4 mi/h with an acceleration of +6.68 m/s2. (a) How much time does it take for the Beetle to reach this speed? (b) A top-fuel dragster can go from 0 to 95.4 mi/h in 1.49 s. What is the acceleration (in m/s2) of the dragst..
Two 0.70m -long pendulums hang side by side. The masses of the pendulum bobs are 55g and 65g. To what height does the heavier bob rebound
A uniform disk with a mass of 1.0 kg and radius of 20 cm is rotating on frictionless bearings with a rotational speed of 10 rad/s, what is the mass of the clay
A harmonic wave has a frequency of v = 40 Hz and a wavelength of 7m. The wave obtains a maximum displacement of Ym = 1.7m, How fast is the wave traveling
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