ISBN: 9787530166260 - () (1 risultati)

paperback. Condizione: New. Language:Chinese.Paperback.Pub Date:2024-01 Pages:40 Publisher:Beijing Juvenile and Children's Publishing House Why do ripe apples fall to the ground. dropped cakes fall to the ground. and thrown balls fall to the ground? What kind of force is at work? It is gravity. Sometimes. gravity is so strong that even light cannot escape. such as when approaching a black hole in the universe; sometimes gravity is so weak that it is almost imperceptible. such as you and your friends. Crazy scientists ar. …