## How do you calculate water velocity in a pipe?

Alternatively, if the flow rate is measured in gallons per minute, the following formula can be used to calculate water velocity. Thus, the velocity v in feet per second is equal to 0.408 times the flow rate Q in gallons per minute divided by the pipe diameter D in inches squared.

## What is the average velocity of a river?

The speed of a river varies from close to 0 m/s to 3.1 m/s (7 mph). Factors that affect the speed of a river include the slope gradient, the roughness of the channel, and tides. Rivers tend to flow from a higher elevation to a lower elevation.

## How do you calculate the velocity of a river?

Stream velocity (V) is primarily a function of the stream area (A), morphology, and slope (S). The average stream velocity reflects the velocity which when multiplied by the cross-sectional area of the stream (area = width·depth: A = w·h) gives the stream discharge (Q).

## What affects the velocity of a river?

The velocity of a river is determined by many factors, including the shape of its channel, the gradient of the slope that the river moves along, the volume of water that the river carries and the amount of friction caused by rough edges within the riverbed.

## Where is the velocity of a river fastest?

Stream Processes. Stream velocity is the speed of the water in the stream. Units are distance per time (e.g., meters per second or feet per second). Stream velocity is greatest in midstream near the surface and is slowest along the stream bed and banks due to friction.

## Which part of a river flows the fastest?

If a stream is flowing along straight, the strongest, fastest flow will be in the center of the stream well above the bottom of the bed or channel but below the surface.

## How do you record velocity?

Velocity can be measured using very simple equipment. A watch capable of timing in seconds, something to float on the water and a tape measure are all that is required to find the velocity of the water surface.

## Is speed always equal to velocity?

Common mistakes and misconceptions. Average speed does not have to equal the magnitude of the average velocity. People may think that average speed and average velocity are just different names for the same quantity, but average speed depends on distance and average velocity depends on displacement.

## What is difference between speed and velocity?

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement.

## What is acceleration with example?

For example, if a car turns a corner at constant speed, it is accelerating because its direction is changing. The quicker you turn, the greater the acceleration. So there is an acceleration when velocity changes either in magnitude (an increase or decrease in speed) or in direction, or both.

## What are the 7 basic units?

The seven SI base units, which are comprised of:

- Length – meter (m)
- Time – second (s)
- Amount of substance – mole (mole)
- Electric current – ampere (A)
- Temperature – kelvin (K)
- Luminous intensity – candela (cd)
- Mass – kilogram (kg)

## What is the full form SI unit?

Système international

## What is M size?

The base unit for length is the meter (m). One meter is defined as the distance traveled by light in a vacuum during 1/299,792,458 of a second (as of 1983). One inch (the English unit counterpart) is defined as exactly 0.0254 m (1 in=2.54 cm).