What is destructive interference? a) Occurs when the crest of one wave meets the trough of another wave as they travel from two different points in the same direction and at the same frequency.

b) Occurs when the crest of one wave stays separate from another wave and they continue moving in their original direction.

Answer quickly, please!

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Asystematic approach to problem solving is called a (an)

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (