Answer:
Work is the change in energy and power is the rate of doing work.
Answer:
2400 kilogram per cubic meter
Explanation:
the density of concrete is a measure of its unit weight.
concrete is a mixture of cement, fine and coarse aggregates, water and sometimes some supplementary materials like fly ash, and various admixtures.
The difference between the above velocities is that they exist in opposite direction of each other. or it can be said that they are negative vectors of each other.
