Two wave pulses pass each other on a string. The pulse traveling toward the right has positive amplitude, whereas the pulse traveling toward the left has equal amplitude in the negative direction. What happens when they occupy the same region of space at the same time?

A. destructive interference occurs.
B. a standing wave is produced.
C. a traveling wave is produced.
D. constructive interference occurs.

Natural forces that can alter ecosystems include seasons and climate changes. t or f

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors