<span>Animalia kingdom consists of complex organisms that includes </span>multi-cellular.
a physical change occurs when materials change shape or size but not the molecular composition of the substance
Answer:
We can reasonably improve a machines ability to do work by reducing the friction between the moving parts of machine.
Explanation:
According to the law of conservation of energy, the energy can neither be created nor destroyed.
Answer:
3 m/s
Explanation:
Kinetic energy of a body is given by the formula
. Let's replace everything we have and solve for what's left.

or 
C. Negative force. The dog isn't going to learn that way.