Lightning that illuminates clouds with flickering flashes is called

a. heat lightning.
b. flash lightning.
c. ball lightning.
d. bolt lightning.


a

Physics & Space Science

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Mercury's period of rotation is exactly _______________ of its orbital period

Fill in the blank(s) with correct word

Physics & Space Science

What is the gravitational force between two 20-kg iron balls separated by a distance of 0.5 m? The gravitational constant is G = 6.67 ´ 10-11 N-m2/kg2.

A. 2.67 ´ 10-9 N B. 5.34 ´ 10-9 N C. 5.34 ´ 10-8 N D. 1.07 ´ 10-7 N

Physics & Space Science

Two loudspeakers are placed facing each other and driven by the same source at 680 Hz. A listener is positioned between the two speakers on the line separating them, thus creating a constructive interference at the listener's ear. What minimum distance would one of the speakers be moved back away from the listener to produce destructive interference at the listener's ear? (The speed of sound =

340 m/s.) a. 0.13 m c. 0.50 m b. 0.25 m d. 1.00 m

Physics & Space Science

What will happen to Triton in the distant future, based on its present orbit?

What will be an ideal response?

Physics & Space Science