To1. PE = mgh
PE potential energy
m mass
g 9.81
h height
P = PE / t
P power
t time
The correct answer is true.
It is true that light fixtures and placement that create shadows on the set, that obscure or completely hide action in certain areas of the set, or that change as the main character’s emotional state changes are all ways that lighting can be used to heighten the drama and suspense in dramatic films.
Lighting plays an important role in film making because it can create scenes that enhance the de drama of the moment or the right mood that the director wants to share. Lighting in the film is an art because the basic principle is that the scene needs to look natural. From that principle, filmmakers and light specialist cand create many kinds of dramatic or jubilation moments if they know how to apply light principles to each scene.
Answer:
The frequency the listener hears is 911.765 Hz.
Explanation:
The speed of a sound is 340 m/s
The speed of listener is 30 m/s in a direction away from the whistle.
The speed of the listener with respect to the sound waves from the whistle
= ( 340 - 30) m/s
= 310 m/s
This because the direction of the sound waves from the whistle and the direction of travel of the listener are the same, that is, both are traveling away from the whistle.
Therefore from the formula we get
⇒ ⇒ =
The frequency the listener hears is 911.765 Hz.
4, because 3+1=4 and displacement is the amount of distance traveled. Hope this helps!