Answer:
The frequency heard by the motorist is 4313.2 Hz.
Explanation:
let f1 be the frequency emited by the police car and f2 be the frequency heard by the motorist, let v1 be the speed of the police car and v2 be the speed of the motorist and v = 343 m/s be the speed of sound.
because the police car is moving towards the motorist at a higher speed, then the motorist will hear a increasing frequency and according to Dopper effect, that frequency is given by:
f1 = [(v + v2/(v - v1))]×(f2)
= [( 343 + 30)/(343 - 36)]×(3550)
= 4313.2 Hz
Therefore, the frequency heard by the motorist is 4313.2 Hz.
The changing force is you swinging the STRING
————-
this is similar because it’s on a set path and you are the earth and the gravitational pull is from the earth which the string represents
One
All objects, every one, as long as the object is not at absolute zero (not very many objects are -- like no common object) emit electromagnetic radiation because they possess thermal (heat) energy.
The answer, surprisingly, is A.
Two
This is just an example of Snells law. The angles are with the normal.
Index of Refraction = sin(input angle) / sin(outgoing angle)
Index of Refraction = sin(angle incidence)/sin(angle of refraction)
Index of Refraction = Sin (36)/Sin(27.5)
Index = 1.28 (rounded)
Answer:
option C...
resistance training is the correct answer
