Answer:
B
Explanation:
acceleration = change in speed / change in time
for 1, speed increases over time, so positive acceleration
for 3, speed decreases over time, so negative acceleration (or deceleration)
There is 138 different ways. Lmk if this helped!!
Answer:
The beat frequency is 0.0019 MHz.
Explanation:
Given that,
Velocity = 0.32 m/s
Frequency = 4.40 MHz
Speed of wave = 1540 m/s
We need to calculate the frequency
Case (I),
Observer is moving away from the source
Using Doppler's effect
Where, v' = speed of observer
Put the value into the formula
Case (II),
Cell is as the source of sound of frequency f' and it moving away from the observer.
Using formula of frequency
We need to calculate the beat frequency
Hence, The beat frequency is 0.0019 MHz.
Answer:
Explanation:
x = < 20, 7, -1 > m
y = < 25, 9, - 5> m
t = 0.1 s
Displacement between x and y is given by
z = y - x
z = < 25 - 20, 9 - 7, - 5 + 1>
z = < 5, 2, - 4 >
Magnitude of displacement is given by
= 6.71 m
Average velocity = total displacement / total time = 6.71 / 0.1 = 67.1 m/s