Simple Harmonic Motion: The position of a cart that is oscillating on a spring is given by the equation x = (12.3 cm) cos[(1.26 s-1)t]. When t = 0.805 s, what are the (a) velocity and (b) acceleration of the cart?
What will be an ideal response?
(a) -13.2 cm/s (b) -10.3 cm/s2
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Two speakers are driven exactly out of phase with each other at 256 Hz. If a microphone is placed on the line between the two speakers exactly in the middle of the line, what is possibly the distance between the microphone and each speaker? The speed of sound is 340 m/s.
A. 0.75 m B. 0.38 m C. Can be any distance at all D. 1.50 m E. 0.94 m
An 18-wheeler and a Volkswagon Beetle are rolling along with the same momentum. If you exert the same force with the brakes to stop each one, which takes a longer time to bring to rest?
A. 18-wheeler B. Volkswagon beetle C. same for both D. impossible to say
When two or more capacitors are connected in series across a potential difference
A) the equivalent capacitance of the combination is less than the capacitance of any of the capacitors. B) the potential difference across the combination is the algebraic sum of the potential differences across the individual capacitors. C) each capacitor carries the same amount of charge. D) All of the above choices are correct. E) None of the above choices are correct.
A laser emits monochromatic and coherent light
Indicate whether the statement is true or false