constant speed
No. It's the (change in speed) divided by the (change in time), plus it really ought to have the direction of the change stated also.
No, angular displacement is not a vector. It is a scalar quantity that represents the change in orientation of a rotating object. It is measured in radians or degrees.
displacment
node
dft
engine displacment in litres.
no its speed that definds the rate change of position
The rate of change is the change divided by the original value. This answer, converted to a percentage is the percentage rate of change.
The rate of change of velocity. (As velocity is the rate of change of position.)
Why does the rate of heartbeat change?
Are you talking about the displacment needed to lift 3000 pounds in water? The total displacment would need to equal the weight of the object AND the contianment vessel AND the entrapped air. Water weighs about 8 (fuel is 6) pounds per gallon. So you'd have to divide the total weight of all objects by 8 pounds to find the displacment. Recognize that you can also count the displacment of the object being lifted as part of the total displacment, so if the 3000 pound object displaces 100 gallons of water, that reduces the total additional displacent by 100 gallons.
It is the percentage rate of change!