A -6.5-µC point charge is 8.0 cm from a -17-µC charge. What is the electric energy density at the point midway between them? (?0 = 8.85 × 10-12 C2/N ? m2, k = 1/4??0 = 9.0 × 109 N ? m2/C2)
What will be an ideal response?
1.5 × 104 J/m3
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What will be an ideal response?
What value of B should be used in a velocity selector to separate out 2.0-keV protons if E is fixed at 80 kV/m?
A. 0.18 T B. 0.11 T C. 0.15 T D. 0.13 T E. 0.23 T
Banked Curves: When a car goes around a banked circular curve at the proper speed speed for the banking angle, what force cause it to follow the circular path?
A. the normal force from the road B. the friction force from the road C. gravity D. No force causes the car to do this because the car is traveling at constant speed and therefore has no acceleration.
Based on current understanding, the minimum mass of a black hole that forms during a massive star supernova is roughly
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