If a 10-V battery, with negligible internal resistance, and a 15-? resistor are connected in series, what is the amount of electrical energy transformed to heat per coulomb of charge that flows through the circuit?
a. 0.67 J
b. 1.5 J
c. 10 J
d. 150 J
e. 25 J
c
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Constant Acceleration Kinematics: In a ballistics test, a bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10.0 cm.(a) What is the magnitude of the average acceleration of the bullet in the sandbag?(b) How many milliseconds does it take the bullet to come to rest in the sandbag?
What will be an ideal response?
A barefoot field-goal kicker imparts a speed of 30 m/s to a football at rest. If the football has a mass of 0.50 kg and time of contact with the football is 0.020 s, what is the force exerted on the foot?
a. 190 N c. 600 N b. 380 N d. 750 N
Two large parallel metal plates are uniformly and oppositely charged and the electric field between them is 7.6 × 106 N/C
(a) What is the charge density on each plate? (b) If the very large charged plates are moved 2 times farther apart, what is the electric field between the plates now?
At a particular point and instant, the magnetic field component of an electromagnetic wave is 15.0 ?T. What is the magnetic energy density of this wave at that point and instant?
(c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2 ) A) 4.47 × 10-4 J/m3 B) 9.72 × 10-5 J/m3 C) 2.26 × 10-4 J/m3 D) 8.95 × 10-5 J/m3 E) 1.79 × 10-4 J/m3