A charge of 25 nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along which the arc lies?
a. 81 N/C
b. 61 N/C
c. 71 N/C
d. 51 N/C
e. 25 N/C
d
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A flat circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T
Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are parallel. A) 3.1 × 10-3 T ? m2 B) 0 T ? m2 C) 5.5 × 10-3 T ? m2 D) 6.3 × 10-3 T ? m2
The best determination of the Hubble constant using Cepheid variables found in distant galaxies by the Hubble telescope suggests
a. that the Hubble constant is about 0.07 km/sec/Mpc. b. that the Hubble constant is about 7 km/sec/Mpc. c. that the Hubble constant is about 70 km/sec/Mpc. d. that the Hubble constant is about 700 km/sec/Mpc.
What value should you use as the area of the base when calculating the answer to Part C?
In Part C, you are asked to calculate the volume of a rectangular prism that has a length of 5.6 cm, a width of 2.1 cm, and a height of 6.6 cm.
A. 12 cm2
B. 11.8 cm2
C. 11.76 cm2
Two people are on a ride where the inside cars rotate at constant angular velocity three times the constant angular velocity of the outer cars. If the two cars are in line at t = 0, and moving at 3? and ? respectively, at what time will they next pass each other?
A.
B.
.C.
.D.
.E.
.