Answer:
Emily's average speed is 6 mph and her average velocity is zero.
Explanation:
We can calculate the average speed as:
s = (s₁ + s₂) / 2 = (5 mph + 7 mph ) /2 = 12 mph / 2 = 6 mph
s: average speed
s₁: speed in the first 3 laps
s₂: speed in the second 3 laps
And we can calculate the average velocity as:
v = (df - di) / t = (0 m - 0 m) / t = 0 m / t = 0 m / s
v: average velocity
df: final displacement
di: initial displacement
t: time
As Emily is finally in the same place, it doesn't matter the time to finish the 6 laps, we know that the displacement is zero so the average velocity is zero too.
Answer:
26) 2 meters a second
27) 2 meters a second
28) 5 meters a second
29) 8 km
Explanation:
1/.5 =2
8/4=2
50/10=5
8km×1= 8
Answer:
Amplitud = 2 m
wavelength = 35 m
Explanation:
The waves are described by an equation of the form
Y = A sin (kx -wt)
With k = 2 π/λ
With A is the amplitude of the wave, λ the wavelength and w the velocity
If we analyze the reporter's data, the maximum height of the value from zero to the highest, which corresponds to the amplitude of the wave
The other value 35 m between each wave corresponds to the distance between the ridges that is equivalent to the wavelength
B. Aquifier
C. desertification
D. aquaculture