It’s used as fuel:) please say Thank you
<h3><em>Answer: Physical properties of a substance are characteristics that can be observed without altering the identity of the substance. Color, odor, density, melting temperature, boiling temperature, and solubility are examples of physical properties. Physical properties can be used to identify a pure substance.</em></h3><h3><em>A pure substance has a definite and constant composition — like salt or sugar. A pure substance can be either an element or a compound, but the composition of a pure substance doesn't vary.</em></h3>
This is true, i double checked!!
Child A runs at 4.1667 meters per second and child B runs at 3.048 meters per sec. If they do not slow down Child A will be able to catch child B.