You already answered the question. Both cars are traveling at 70kmph, which is the same velocity.
Velocity is direction and speed so the vehicle do not have the same velocity
Mathematical refraction is when we use the mathematical formula to calculate the velocity of light as it passes from one medium to another.
As, in the velocity-time graph, curves passes through zero means 'when time is zero velocity is zero'. Velocity is time derivative of displacement. So displacement is maximum or minimum when time is zero in position-time graph.
The segment that passes through a vertex and is perpendicular to the opposite side is called the altitude of the triangle.
No. Since velocity is a vector, the direction of the magnitude (speed) is also relevent. First which car is moving in a positive direction (either is correct) --- v = +70 km/h. Since the other car is moving in the opposite direction, its velocity is -70 km/h.
You already answered the question. Both cars are traveling at 70kmph, which is the same velocity.
Velocity is direction and speed so the vehicle do not have the same velocity
it changes in velocity
When an object is moving in a particular direction, air resistance will be acting on the object in the opposite direction to the direction of travel.
Velocity (speed and direction) Wavelength (frequency)
refraction
refraction
You observe the light falling from another direction
The wavelength is equal to the local velocity of sound divided by the frequency, As with light, there can be refraction when sound passes from one medium to another with a different sound velocity.
Refraction
Mathematical refraction is when we use the mathematical formula to calculate the velocity of light as it passes from one medium to another.