If i thought about this properly the answer is b
Answer:
a. 4.9 m
Explanation:
To solve this problem we must take into account that power is defined as the relationship between the work and the time in which the work is done.
P = W/t
where:
P = power = 95 [W] (units of watts)
W = work [J] (units of Joules)
t = time = 6.2 [s]
We can clear the work from the previous equation.
W = P*t
W = 95*6.2 = 589 [J]
Now we know that the work is defined by the product of the force by the distance, therefore we can express the work done with the following equation.
W = F*d
where:
F = force = 120 [N] (units of Newtons)
d = distance [m]
d = W/F
d = 589/120
d = 4.9 [m]
I beileve the answer is B
Answer:
2.97795 Hz
Explanation:
v = Speed of sound in air = 343 m/s
= Relative speed between the speakers and the student = 1.12 m/s
= Actual frequency of sound = 456 Hz
Frequency of sound heard as the student moves away from one speaker
Frequency of sound heard as the student moves closer to the other speaker
The difference in the frequencies is
The student hears 2.97795 Hz
I believe that it is true! :)
