A transverse wave is traveling on a string stretched along the horizontal x-axis. The equation for the vertical displacement y of the string is given by y = 0.0020 cos[?(15x - 52t)], where all quantities are in SI units
The maximum speed of a particle of the string is closest to
A) 0.33 m/s. B) 0.43 m/s. C) 0.64 m/s. D) 0.53 m/s. E) 0.74 m/s.
A
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The maximum induced emf in a generator whose coils are rotating at 240 rpm is 35 V. If, instead, it is desired to generate a maximum emf of 45 V but with half the magnetic field, what rotation rate must be used?
A. 380 rpm B. 190 rpm C. 310 rpm D. 165 rpm E. 610 rpm
What three main observed phenomena are the strongest support for the "big bang" theory?
What will be an ideal response?
A voltage source of 10.0 V is connected to a series RC circuit where R = 2.80 × 10^6 ?, and C = 3.50 µF. Find the amount of time required for the current in the circuit to decay to 4.00% of its original value. Hint: This is the same amount of time for the capacitor to reach 96.0% of its maximum charge
a. 19.1 s b. 13.6 s c. 0.143 s d. 31.5 s e. 309 s
Light from inside a raindrop that exits into the air
A) slows down. B) remains at speed c. C) speeds up. D) none of the above