Lightning struck 2000m away from you, how long will it take to hear the thunder? (Assume that the velocity of sound is 345 m/s in air)
A. 5.80 seconds
B.17 seconds
C.170 seconds
D.0.00588 seconds
Please help me understand the answer

Give an example in which the electrical energy changes to light energy

At what time will the interfering waves have an amplitudeof zero?

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.