Step-By-Step Experiments with Simple Machines
Introduces simple machines, including the wedge, the pulley, and the level, demonstrating their use in everyday objects --
Introduces simple machines, including the wedge, the pulley, and the level, demonstrating their use in everyday objects --
The Child's World, Inc · inglés · ISBN 9781626879553
Child's World · inglés · ISBN 9781609735869
Child's World, Incorporated, The · inglés · ISBN 9781614731603
Child's World, Incorporated, The · inglés · ISBN 9781503801288
