Calculating Average Linear Velocity: 1.66m/s to 1.73m/s

In summary, average linear velocity is the average rate at which an object moves in a straight line over a certain distance within a specific time period. To calculate it, the total distance traveled is divided by the total time it took to travel that distance. This measurement is typically expressed in meters per second or kilometers per hour. It is different from instantaneous linear velocity, which only measures the velocity at a specific moment in time. Average linear velocity has practical applications in various fields such as physics, engineering, and sports, and can be used to analyze motion and predict future positions of objects.
  • #1
sci0x
83
5
Homework Statement
Water flows through a tubular heat exchanger with a 35mm inner diameter tube at flowrate 100L per min. Calculate Reynold no. Re for the fluid. Temp is 70 degrees celcius. Density is 977kgm-3. Viscosity is 0.0004Pa s.
Relevant Equations
Average linear velocity
Reynold number Re
First i need the average linear velocity

100L/min =
0.1m3/min
0.00167m3/sec

Cross Sec Area = Pie r2
=pie(0.0175m)2
9.61x10-4 m2

0.0016m3/s / 9.61x10x-4m2
= 1.66m/s

But my notes say this should be 1.73 m/s

Once i have the average linear velocity i can calculate Re.
Help appreciated
 
Physics news on Phys.org
  • #2
Do less rounding in the intermediate steps. You are rounding 1.67 to 1.6 and expecting to get an answer that is correct to the third decimal ...
 
  • Like
Likes sci0x

FAQ: Calculating Average Linear Velocity: 1.66m/s to 1.73m/s

What is average linear velocity?

Average linear velocity is the measure of the average speed of an object in a straight line over a certain period of time. It is calculated by dividing the total distance traveled by the total time taken.

How do you calculate average linear velocity?

To calculate average linear velocity, divide the change in displacement (final position - initial position) by the change in time (final time - initial time). This will give you the average speed of the object in meters per second (m/s).

What is the difference between average and instantaneous linear velocity?

Average linear velocity is calculated over a certain period of time and gives the average speed of the object, while instantaneous linear velocity is the speed of the object at a specific moment in time.

How do you convert from meters per second (m/s) to other units of velocity?

To convert from meters per second to other units of velocity, you can use conversion factors. For example, to convert to kilometers per hour, multiply the m/s value by 3.6. To convert to miles per hour, multiply by 2.237.

Can average linear velocity be negative?

Yes, average linear velocity can be negative if the object is moving in the opposite direction of the positive direction. For example, if an object moves from 1 meter to 2 meters in 1 second, its average linear velocity would be 1 m/s. However, if the object moves from 2 meters to 1 meter in 1 second, its average linear velocity would be -1 m/s.

Similar threads

Calculate Distance Traveled: Instantaneous vs. Average Velocity
Replies
5
Views
2K
Calculating Mean Velocity: Is Re Above 4000 Really Turbulent?
Replies
17
Views
1K
Average speed and average velocity
Replies
3
Views
3K
Rotational Motion: Average angular acceleration of a CD
Replies
2
Views
5K
Average velocity when the interval has a domain
Replies
7
Views
2K
Calculating Angular Velocity and Linear Acceleration in a Speed Skater's Curve
Replies
8
Views
4K
Average Force of two people pushing away on carts
Replies
11
Views
2K
Not exactly a homework issue - just trying to find a formula
Replies
8
Views
2K
Methods for calculating average velocity
Replies
4
Views
5K
How Fast Does the Tip and Center of Mass of a Falling Rod Travel?
Replies
1
Views
4K

Hot Threads

Recent Insights

Back
Top