The Crab Pulsar has a period of length 33.085 ms. It is estimated to have an equatorial radius of 15 km, about average for a neutron star. What is the value of the centripetal acceleration of an object on the surface at the equator of the pulsar?
a. 
b. 
c. 
d. 
a.
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Potential of Point-Charges: Point charges +4.00 ?C and +2.00 ?C are placed at the opposite corners of a rectangle as shown in the figure. What is the potential at point A, relative to infinity, due to these charges? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. 0.899 kV B. 8.99 kV C. 89.9 kV D. 899 kV E. 8990 kV
Parallel-Plate Capacitor: An ideal air-filled parallel-plate capacitor consists of plates that are 1.0 mm apart and have an area of 1.5 × 10-4 m2. The capacitor is connected to a 12-V potential source (battery). (?0 = 8.85 × 10-12 C2/N ? m2)(a) What is the capacitance of this capacitor?(b) How much charge is on each of its plates?(c) What is the strength of the electric field between the plates?
What will be an ideal response?
A 2.00 nC charge is placed on the x-axis at x = -3.00 cm, another 2.00 nC charge is place on the x- axis at x = 3.00 cm, and a third 2.00 nC charge is placed on the y-axis at y = 3.00 cm. What is the potential at the origin?
A. 1800 V B. 2700 V C. 3600 V D. 5400 V E. 108 V
Light travels slower in a lens having a
A) high index of refraction. B) low index of refraction. C) same in each