PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
2 answers:
Answer:
Average speed, v = 1.66 km/h
Explanation:
It is given that, Ian walks 2 km to his best friend’s house, then walks 0.5 km to the library. He then makes a 2.5 km walk home.
Total time taken in the entire walk, t = 3 hours
We need to find the average speed of the Ian during his journey.
Total distance covered is,
Average velocity,
So, the average speed during the entire journey is 1.66 km/h. Hence, this is the required solution.
You might be interested in
The tension in the string B) It quadruples.
Explanation:
The ball is in uniform circular motion in a horizontal circle, so the tension in the string is providing the centripetal force that keeps the ball in circular motion. So we can write:
where:
T is the tension in the string
m is the mass of the ball
v is the speed of the ball
r is the radius of the circle (the lenght of the string)
In this problem, we are told that the speed of the ball is doubled, so
v' = 2v
Substituting into the previous equation, we find the new tension in the string:
Therefore, the tension in the string will quadruple.
Learn more about circular motion:
#LearnwithBrainly
Answer:
Explanation:
Given
n=5
0.3 fraction recrystallize after 100 min
According to Avrami equation
where y=fraction Transformed
k=constant
t=time
Taking log both sides
At this Point we want to compute
taking log both sides
Rate of Re crystallization at this temperature