You would like to know the chemical composition of a star's atmosphere. Therefore you will need to obtain the star's ______________ spectra
Fill in the blank(s) with correct word
emission
or
absorption
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An object of mass 5.0 kg revolves at 600 rpm in a horizontal circle of radius 1.5 m. Determine the
a) period of the object's motion in seconds, b) object's speed, c) magnitude of the centripetal acceleration, d) magnitude of the centripetal force acting on the object.
A metal sphere of radius 2.0 cm carries a charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere?
A) 4.2 × 106 N/C B) 5.7 × 106 N/C C) 6.4 × 106 N/C D) 7.5 × 106 N/C E) 9.3 × 106 N/C
PET is an abbreviation for
A) photon-electron tunneling. B) positron emission tomography. C) photon emission tunneling. D) photon emission tomography. E) pericranial electromagnetic technique.
Two loops of wire are arranged so that a changing current in one, the primary, will induce a current in the other, the secondary. The secondary loop has twice as many turns as the primary loop. As long as the current in the primary is steady at 6 A, the current in the secondary will be:
a. 3 A. c. 6 A. b. 1.5 A. d. zero.