Not 100% sure but i think it was Galileo of Newton
It is known as the vector.
"speed" or "the speed"
Velocity also includes direction.
Yes, if they have the same volume.
Velocity.
By a process called blink comparator. By observing the same area of sky it is possible to see what objects are moving and at what speed.
The evidence for the existence of dark matter in the universe includes the extra mass of Galactic clusters discovered by Fritz Zwicky, and the spinning galaxies which rotate at the same speed as discovered by Vera Rubin.
it was MAxwell the dude who discovered electromagnetic waves
when you know both speed and direction of an objects motion you know the velocity of an object.
The second species in any environment.It was either a predator and wanted to move faster than the first to catch and eat it, or it was the prey and wanted to get away! So several millions of years before the first humanoid.
The speed varies according to the refractive index of the objects.
Galileo's experiment to show that mass had little effect on the speed of falling objects involved two cannonballs of different sizes being dropped from a certain height. This showed that, in a vacuum at least, falling objects fall at the same speed no matter their mass.
Speed only tells how fast something is going, while velocity tells speed and direction.
It is known as the vector.
Green
Different objects can have different speeds; also, the same object can have one speed now, and a different speed later.
not sure