Evans, David <br/><br/>
Let's explore science : Make it balance 

 - New York   Dorling Kindersley  1992 
 - 29 p. 
 - Let's explore science .
<br/><br/> nvestigates, through simple experiments, the basic principles of balance and explores the concepts of gravity, mass, force, and weight. 
<br/><br/><label>ISBN: </label>9781564581181 
<br/><br/><label>Subjects--Index Terms: </label>Equilibrium   Experiments