A charged 1-?F capacitor is discharged through a 1.00-k? resistor as shown in the diagram below. If the original charge on the capacitor is Q, what is its charge 1.00 s after the switch is closed?
3
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When the temperature of a strip of iron is increased, the length of the strip _______.
A. also increases B. decreases in width as it gets longer C. may increase or decrease D. decreases
In most extrasolar planetary systems the center of mass is likely to be located
A) midway between the star and its most massive planet B) close to the center of the parent star C) exactly at the center of the parent star D) close to the center of the most massive planet
A crate of weight w is being pushed across a horizontal surface by a force directed at an angle of 20° below the horizontal. What is the magnitude of the normal force on the crate?
a. It is less than w. b. It equals w. c. It is more than w. d. None of the above since the coefficient of kinetic friction is not given.
The left-hand end of a glass rod is ground to a spherical surface. The glass has index of refraction 1.50
A small object 4.00 mm tall is placed on the axis of the rod, 37.0 cm to the left of the vertex of the spherical surface. The image is formed in the rod, 50.0 cm to the right of the vertex. (a) What is the magnitude of the radius of curvature of the spherical surface at the end of the rod? (b) What is the height of the image?