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The chamber of a rock-tumbling machine is a hollow cylinder withmass 62 g and radius 7.1 cm. The chamberis closed off by end caps in the form of uniform circular diskseach of mass 22 g.
a) What is the rotational inertia of the chamber about its central axis?b) What torque is necessary to give the chamber an angular acceleration of 3.2 rad/s2?
how does the count rate vary with distance from a point source? if the counter is moved twice the distance from the source, how is the count rate affected
A 33.0cm focal length converging lens is 17.2cm behind a diverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
Each of the six real batteries in the figure has an emf of 21.5 Vand a resistance of 4.10 Ω. The external resistor hasresistance R = 3.59 Ω. At what rate does each battery transfer energy to its internal thermal energy?
An electron is initially at rest just outside a large copper surface that has a charge density of 1.04 10-6 C/m2. How far has the electron moved in 1.12 10-9 s if the field is uniform over this region
an ice chest at a beach party contains 10 cans of soda at 2 deg c. each can of soda has a mass of 0.36 kg and a
A uniform magnetic field of magnitude 1.00 T is directed perpendicular to the plane of a rectangular loop having dimensions 8.1 cm by 10 cm
Solve the Friedmann equation to get the scale factor as a function of time.
a 4.20-g bullet embeds itself in a 20.0-kg block which is attached to a horizontal spring with a force constant of 950
A 20 kg child is riding a 5.4 kg bike with a velocity of 5.4 m/s to the northwest. a)What is the total momentum of the child and the bike together? Answer in units of kg · m/s b) What is the momentum of the child?
A nuclear power plant has a reactor that produces heat at the rate of 690 MW. This heat is used to produce 250 MW of mechanical power to drive an electrical generator. At what rate is heat discarded to the environment by this power plant? MW
A particular radioactive sample undergoes 3.60x10^6 decays/s. What is the activity of the sample in the following in curies
A lightbulb filament has diameter 5.70×10?2 mm and carries 0.857 A. Find the current density in the filament
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