An ideal transformer with 120 turns in its secondary supplies 12 V at 220 mA to a toy train. The primary is connected across a 120-V wall outlet
(a) How many turns are in the primary?
(b) What is the primary current?
(c) What power is delivered by the wall outlet?
(a) 1200 (b) 22 Ma (c) 2.6 W
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At which is the potential smallest?
A. A B. B C. C D. D E. E F. None of the labeled points
A block is on a frictionless table, on earth. The block accelerates at 5.3 m/ when a horizontal force is applied to it. The block and table are set up on the Moon where the acceleration due to gravity is 1.62 m/
A horizontal force of 5 N is now applied to the block when it is on the Moon. The acceleration imparted to the block by this force is closest to A) 2.7 m/ . B) 2.4 m/ . C) 2.9 m/ . D) 3.2 m/ . E) 3.4 m/ .
A grindstone spinning at the rate of 12 rev/s has what approximate angular speed?
a. 3.2 rad/s c. 52 rad/s b. 26 rad/s d. 75 rad/s
Granite does not readily form near oceanic-oceanic convergent boundaries because
A) granite forms from granitic magma and most oceanic material is basaltic in origin. B) the magma formed at this type of boundary is not conducive to producing granitic type rocks. C) oceanic-oceanic convergence often results in the eruption of andesitic lavas. D) all of the above