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A force of 12 N is applied to the handle of a screwdriver being used to pry the lid off a paint can. As the force moves through a distance of 0.3 m, the screwdriver does 3.2 J of work on the lid. What is the efficiency of the screwdriver? Show your work.
A 30-kg child rides on a circus Ferriswheel that takes her around a vertical circular path with a radiusof 20 m every 22 s. What is the magnitude of the resultant force on the child
Using the capacitance determined in part (a),which equals 21 micro F, compute the current in the circuit 6.6 ms after the switch is closed. Assume that the capacitor is uncharged initially and that the emf of the battery is 9.0 {rm V}. Resistance= ..
A current of 0.80A flows through a copper wire 0.50mm in diameter, How long is the wire in km
Although there are many mechanisms that help large mammals (such as elephants) keep cool in hot climates, the size of ears is a big factor. estimate the relative temperature difference between the territory of African elephants versus the territory ..
an empty parallel plate capacitor is connected between the terminals of a 13.9-v battery and charges up. the capacitor
question the total angular momentum of a flywheel having a rotational inertia 0.0924 kg-m2 about its axis decreases
two blocks of masses 20 kg and 8 kg are connected together by a light string and rest on a frictionless level surface.
Tom the cat is chasing Jerry the mouse across a table surface1.5 m above the floor. What velocity components will he have just before he hits
a positive charge of 5.30 oc is fixed in place. from a distance of 3.80 cm a particle of mass 6.00 g and charge 3.60 oc
Microcontrollers usually do not include D/A converters but you can easily create a crude version of one usually signle digital I/O pin. This can be done by outputting a variable-width pulse train to an RC circuit.
Two 4.0-g spheres are suspended by 8.0-cm-long light strings (see the figure). A uniform electric field is applied in the x-direction. determine the electric field intensity
an electron is placed in a uniform electric field of strength 195 nc. if the electron is at rest at the origin of a
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