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Why do you require velocity when you have speed?
And object's speed refers to a magnitude of movement in relation to something (often the ground or a stationary relative object). A Vector, usually represented by an arrow, shows a scalar (some magnitude or speed) and a direction. The scalar magnitude could be an object's speed. However, without a directional component, it's not a vector, simply a speed of scalar. Velocity IS a vector because velocity by definition includes a scalar (force/speed) AND a direction in which it is moving. Therefore Velocity is a Vector, but Speed is only part of what makes a Vector. Example: Bob is running 10 mph North along a sidewalk. His velocity is 10 miles per hour North. A Vector drawing would show an arrow 10 units long pointing North along the sidewalk. It's speed is a flat 10 mph at that given moment, it is the scalar portion of the vector without the directional component. As an addition, Acceleration is the rate of change in Velocity. So we have a Speed- 10 mph. Then we have Velocity- 10 mph North. Acceleration is what shows his velocity changing... How quickly does he speed up at the beginning of his run... How quickly does he slow down at the end... At what rate does his direction/speed change as he turns a corner...etc.
How do you calculate air flow rate through a tapered cylinder?
Using conservation of mass: mass flow rate = ρ * V * A where ρ= density, V= velocity, and A= cross sectional area therefore since massin = massout therefore: (ρ*V*A)in = (ρ*V*A)out
How can you change an objects velocity?
Yes - speed is rate of change of position irrespective of direction. What an object cannot do is change direction without changing velocity, which is speed in a particular direction, i.e. a vector rather than a scalar. In vector terms, speed is the modulus of the velocity vector. An example would be a body in gravitational circular orbit around another body - constant speed, but continuously changing velocity due to the gravitational force.
Advantages of vector quantization over scalar uantization?
Advantage of VQ over SQ: 1.For a given rate, VQ results in a lower distortion than SQ. 2.If the source output is correlate, vectors of source output values will tend to fall in clusters. 3.Even if no dependency: greater flexibility.
Why as the water falls its speed increases and the area of cross section decreases?
It is explained by mass conservation, and water being an incompressible fluid. Imagine water going through a pipe with varying inside diameters Di's. Water will flow the fastest in the pipe section with the smallest diameter, and will flow the slowest in the widest section of the pipe. The product of the volumetric average velocity of the water flow v, times the cross section area A, is equal to the volumetric flow rate (vol/time) G. G = v∙A If you have a constant volumetric flow rate, if the area reduces to half, the velocity doubles. By the way, if you multiply the volumetric flow rate G by the liquid density ρ, you get the mass flow rate Q, (mass/time). Q = G∙ρ = ρ∙v∙A
Is momentum a scalar quality?
A vector quantity is one which transforms like the coordinates. In other words, if a coordinate system is transformed by an operator , any vector quantity in the old coordinate system can be transformed to its equivalent in the new system by the same operator. An example of a vector quantity is displacement (r). If displacement is a vector, the rate of change of displacement (dr/dt) or the velocity is also a vector. The mass of an object (M) is a scalar quantity. Multiplying a vector by a scalar yields a vector. So momentum, which is the mass multiplied by velocity, is also a vector. Momentum too transforms like the coordinates, much like any other vector. The definition of a vector as a quantity having "magnitude and direction" is simply wrong. For example, electric current has "magnitude and direction", but is a scalar and not a vector.
Why is electric current a scalar quantity?
For a physical quantity to be termed a vector quantity, having magnitude and direction is not enough. The quantity should obey the laws of vector addition too. Like the triangle law or the parallelogram law. As we know, if two currents meet at a junction, the total current of the resultant current will be the algebraic sum of the two current and not the vector sum.Sometimes, treating a current like a vector makes sense, like when the current though a conductor induces a magnetic field.
Is power is a vector quantity?
No, power is not a vector quantity. It is a scalar quantity because it only has magnitude, not direction. Power is defined as the rate at which work is done or energy is transferred.
Why is speed classified as a scalar quantity and velocity classified as a vector quantity?
Speed is the rate of which an object is moving altogether and is a scalar quantity and thus only requires a magnitude and is found by the use of the formula speed=distance/time SI unit = m.s-1 Velocity is the rate of which a object is moving in a given direction, so is vector quantity and both a magnitude and direction are required found by the formula velocity=displacement/time SI unit = m.s-2
What is performance ratio of desalination plant?
the ratio of the distillate mass flow rate to the mass flow rate of the steam used
This is a quantity that has both size and direction?
Such a quantity is called a vector. A shining example is velocity itself. velocity is the rate of change of displacement- the distance moved by particle in a specified direction. Since velocity = displacement/time taken = vector/scalar, Velocity thus has both a direction and a magnitude (magnitude = speed of particle) Another examples include quantities such as Force, acceleration, displacement
What is the name of the speed with direction?
Velocity is the measurement of the rate and direction of change in the position of an object. It is a vector quantity; both magnitude and direction are required to define it. The scalar value of velocity is speed. For example, a speed of "5 meters per second" is a scalar and not a vector measurement, whereas a velocity of "5 meters per second east" is a vector measurement stating both speed and direction.
What are advantages of vector quantization?
Vector quantization lowers the bit rate of the signal being quantized thus making it more bandwidth efficient than scalar quantization. But this however contributes to it's implementation complexity (computation and storage).
What is the mass flow rate of domestic LPG?
16LPM
What is meant by flow rate?
The flow rate may be defined by the quantity of a fluid which can be transportted through a hole with a given area in an unit of time.
What is relation between mass flow rate and discharge pressure in reciprocating compressor?
These have a inverse relation. You will need to know the discharge and the incoming pressure in order to find out the mass flow rate.
Why do you require velocity when you have speed?
And object's speed refers to a magnitude of movement in relation to something (often the ground or a stationary relative object). A Vector, usually represented by an arrow, shows a scalar (some magnitude or speed) and a direction. The scalar magnitude could be an object's speed. However, without a directional component, it's not a vector, simply a speed of scalar. Velocity IS a vector because velocity by definition includes a scalar (force/speed) AND a direction in which it is moving. Therefore Velocity is a Vector, but Speed is only part of what makes a Vector. Example: Bob is running 10 mph North along a sidewalk. His velocity is 10 miles per hour North. A Vector drawing would show an arrow 10 units long pointing North along the sidewalk. It's speed is a flat 10 mph at that given moment, it is the scalar portion of the vector without the directional component. As an addition, Acceleration is the rate of change in Velocity. So we have a Speed- 10 mph. Then we have Velocity- 10 mph North. Acceleration is what shows his velocity changing... How quickly does he speed up at the beginning of his run... How quickly does he slow down at the end... At what rate does his direction/speed change as he turns a corner...etc.
