A floating leaf oscillates up and down twice in 1 s as a water wave of wavelength 10 m passes by. What is the wave's speed?
A) 2 m/s
B) 10 m/s
C) 20 m/s
D) 40 m/s
E) more than 40 m/s
Answer: C
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RC Circuits: For the circuit shown in the figure, V = 60 V, C = 20 µF, R = 0.10 M?, and the battery is ideal. Initially the switch S is open and the capacitor is uncharged. The switch is then closed at time t = 0.00 s. What is the charge on the capacitor 8.0 s after closing the switch?
A. 1200 µC B. 940 µC C. 1400 µC D. 1600 µC E. 1900 µC
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Indicate whether the statement is true or false
Does the magnetic force on the longer sides of the generator loop help or hinder the rotation of the generator loop?
A. The magnetic forces on the loop hinder the rotation of the generator loop. B. The magnetic forces on the loop neither help nor hinder the rotation of the generator loop. C. The magnetic forces on the loop help the rotation of the generator loop.
An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object
A) travels 2.0 m in every second. B) is traveling at 2.0 m/s. C) is decreasing its velocity by 2.0 m/s every second. D) is increasing its velocity by 2.0 m/s every second.