How does a periscope work? Do computers understand English? How do we hear sounds? What is gravity? Why do boats float? How does a parachute work? What is a molecule? Why does water in a lake look blue? What causes electric shocks?
| Publisher | Grolier |
| Year of publication | 1989 |
| Number of pages | 32 |
| Language | English |
| Format | Hardback |
| ISBN-10 | 717225577 |
| ISBN-13 | 9780717225576 |
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