A uniform linear charge density of 4.0 nC/m is distributed along the entire x axis. Consider a spherical (radius = 5.0 cm) surface centered on the origin. Determine the electric flux through this surface
a. 68 N / m2/C
b. 62 N / m2/C
c. 45 N / m2/C
d. 79 N / m2/C
e. 23 N / m2/C
c
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Collisions in Two Dimensions: A car heading north suddenly collides at an intersection with a truck of the same mass heading east. If they lock together and travel at 28 m/s at 15° north of east just after the collision, how fast was the car initially traveling?
A. 14 m/s B. 7 m/s C. 28 m/s D. 11 m/s
Potential: A 4.0-g bead carries a charge of 20 ?C. The bead is accelerated from rest through a potential difference V, and afterward the bead is moving at 2.0 m/s. What is the magnitude of the potential difference V?
A. 800 kV B. 400 kV C. 800 V D. 400 V E. 200 V
The current in an electron beam in a cathode-ray tube is measured to be 50 µA. How many electrons hit the screen in 7.0 s? (e = 1.6 × 10^?19 C)
a. 4.4 × 10^11 electrons b. 3.5 × 10^13 electrons c. 2.2 × 10^15 electrons d. 3.1 × 10^18 electrons e. 2.7 × 10^17 electrons
Accuracy refers to the repeatability of a measurement using a given instrument
Indicate whether the statement is true or false