How many revolutions does it make during the time
A motor spins an 2 kg block around on an 80 cm arm at 200 rpm. The blosk is supported by a steel table after the motor stops. How long does the block take to come to rest? How many revolutions does it make during this time?
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A 1.10m long straight wire has a resistance R = 14.0 Ohm and is connected to a 3.00V battery. The wire is located in a uniform magnetic field B directed perpendicular to the wire. Calculate the magnitude of B when the force on the wire due to B i
Two convex lenses with focal lengths f1 = 6.0cm and f2 = 8.0cm are located 24.4cm apart. An object is located 13cm in front of the first lense. Calculate the distance from lense 2 to the final image and the magnification of the final image
The 4.0 V battery is then disconnected and replaced with a 8.0 V battery, with the positive and negative terminals connected in the same manner as before. How much additional charge flows to the positive plate?
A wire along the z-axis carries a current of 6.2 A in the +z direction. Find the magnitude and direction of the force exerted on a 6.2-cm long length of the wire by a uniform magnetic field with magnitude 0.37 T in the -x direction.
A hydraulic lift in a garage has two pistons: a small one of cross-sectional area 4.10cm2 and a large one of cross-sectional area 260cm2 . If this lift is designed to raise a 3500- car, what minimum force must be applied to the small piston?
(a) What is the tangential acceleration of a bug on the rim of a 12.0-in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 80.0 rev/min in3.50 s?
A person notices a mild shock if the current along a path through the thumb and index finger exceeds 80 µA. Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin resistance of 4.0 105 and a wet-
A certain LCD projector contains a single thin lens. An object 23.5mm high is to be projected so that its image fills a screen1.87m high. The object-to-screen distance is3.05m. (a) Determine the focal length of the projection lens.
An airplane has a mass of 33,500 kg and takes off under the influence of a constant net force of 37,500 N. What is the net force that acts on the plane's 80 kg pilot?
The intensity level is 65 dB at a distance 5 m from a barking dog. What would be the intensity level if two identical dogs very close to each other are barking?
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