Answer:
-8 m/s²
Explanation:
Initial velocity = 40 m/s
Final velocity = 0 m/s
Time (T1) = 5 s
Time (T2) = 10 s
Acceleration = v - u/t2 - t1
Acceleration = 0 - 40/10 - 5
Acceleration = -40/5
Acceleration = -8 m/s²
Answer:
B) Its horizontal velocity component is the same as it was just as it was launched
Explanation:
From dynamic we know that free falling objects had two components of velocity
The only acceleration that takes place in this case is gravity in the y-component of velocity
Since a=0 and that means that the velocity at the y-component changes with time but the horizontal component remain the same
This means that the horizontal velocity is not 0 but is <u><em>the same as it was just as it was launched</em></u>
Answer:
t = 25.5 min
Explanation:
To know how many minutes does Richard save, you first calculate the time that Richard takes with both velocities v1 = 65mph and v2 = 80mph.
Next, you calculate the difference between both times t1 and t2:
This is the time that Richard saves when he drives with a speed of 80mph. Finally, you convert the result to minutes:
hence, Richard saves 25.5 min (25 min and 30 s) when he drives with a speed of 80mph
Answer:
A. 1 in³ / 16.4 cm³
Explanation:
Inches is an imperial unit while centimeter is a metric unit.
1 inch = 2.54 cm
⇒1 inch³ = 2.54³
⇒1 inch³ = 2.54×2.54×2.54
⇒1 inch³ = 16.38 cm³ = 16.38 cc
So,
So, 1 in³ / 16.4 cm³ conversion factor should be used.
The sample appears to have gone through 3 half-lives
1st half life: 1000 to 500 g
2nd half life: 500 to 250 g
3rd half life: 250 to 125 g
The duration of a half-life, therefore, can be inferred to be 66 ÷ (3) = 22 days.
After a 4th half life, there will be 125÷2= 62.5 g.
At this point, an additional 22 days will have passed, for a total of 88 days.
Answer is C.