A baseball outfielder throws a baseball of mass 0.36 kg at a speed of 34.0 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory? Ignore air friction
a. zero
b. 312 J
c. 156 J
d. 52.0 J
e. 208 J
c
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A parallel-plate capacitor has plates of area 0.40 m2 and plate separation of 0.20 mm. The capacitor is connected to a 9.0 V battery
(a) What is the electric field between the plates? (b) What is the capacitance of the capacitor? (c) What is the charge on the capacitor?
Discuss the differences between distance and displacement
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A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T
How would the period of the pendulum change if the supporting chain were to break, putting the elevator into freefall? A) The period does not change. B) The period increases slightly. C) The period decreases slightly. D) The period becomes zero. E) The period becomes infinite because the pendulum would not swing.