The angular measurement in hours, minutes, and seconds from the celestial prime meridian eastward is called _______________
a. sundial
b. protractor
c. declination
d. right ascension
d
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Because of electrostatic polarization, a sufficiently charged rubber balloon will attract a neutral horizontal insulating plate strongly enough so that the balloon sticks firmly to the plate’s bottom. If the horizontal plate is a conductor instead of an insulator, the charged balloon will
A. stick only if the plate is connected to the earth. B. stick only if the plate is insulated from the earth. C. stick in either case. D. not stick at all. E. repel the plate.
A soap bubble (n = 1.35) is floating in air. If the thickness of the bubble wall is 115 nm, what visible light wavelength is most strongly reflected?
In a two-slit experiment using coherent light, the distance between the slits and the screen is 1.10 m, and the distance between the slits is 0.100 mm
If the first-order bright fringe is measured to be 3.40 cm from the centerline, what is the wavelength of the light? A) 3.09 ?m B) 241 nm C) 2.11 ?m D) 354 nm E) 133 nm
A wire of thickness d = 5 mm is tightly wound 200 times around a cylindrical core to form a solenoid. A current I = 0.1 A is sent through the wire. What is the the magnetic field on the axis of the solenoid?
A) 6.6 × 10-5 T B) 2.5 × 10-5 T C) 1.3 × 10-5 T D) 3.6 × 10-5 T E) 9.8 × 10-5 T