Explanation:
100 CM = 1 m
45 CM = 45 / 100 = 0.45 m
hope it helps:)
Answer:
change in frequency is 636 Hz
Explanation:
given data
speed v1 = 36 m/s
speed v2 = 45 m/s
frequency f = 500 Hz
speed of sound s = 343 m/s
to find out
what is the change in frequency
solution
we know here change of frequency formula that is
frequency = 
(f) ...................1
put here value in equation 1
and we take v2 = -45 because opposite direction
frequency = 
(f)
frequency = 
(500)
frequency = 636
so change in frequency is 636 Hz
Explanation:
The question is not complete, here is the complete question
<em>"Beatrice and the Elevator Beatrice, a middle school student, is visiting a very tall office building and notices that she feels heavier when the elevator car is traveling up and lighter when the elevator car is traveling down. After making these observations, Beatrice comes back to the building and stands on a bathroom scale that measures her weight as she travels up and down in the elevator.</em>
<em>1. . What question is Beatrice trying to answer?</em>
<em>2. What is one variable Beatrice could change in her investigation? What might she figure out if this
</em>
<em> variable was changed"</em>
1. Beatrice is trying to observe the influence of the elevator movement on her weight, Hence the question is<em> "will the elevator movement cause her weight to change"</em>
therefore moving upward the reading on the scale will increase
Reading=mg+ma
downward
Reading will reduce
Reading=mg-ma
2. The independent variable is the acceleration due to gravity g=9.81m/s^2
while the dependent variables are
i. The elevators acceleration
ii. Beatrice's mass
As the boulder falls off the cliff, the gravitational potential energy that the boulder has is converted into kinetic energy. If you do the calculations, you will see that the kinetic energy the boulder has is equal to the gravitational potential energy it had before it fell off a cliff.
