Consider two identical and symmetrical wave pulses on a string. suppose the first pulse reaches the fixed end of the string and is reflected back and then meets the second pulse. when the two pulses overlap exactly, the superposition principle predicts that the amplitude of the resultant pulses, at that moment, will be what factor times the amplitude of one of the original pulses? a. 0b. 1c. -2d. -1

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b