—Will you stay for supper with us?
—Sure, I'd love to. Home cooking is just what I like.
将一质量为5kg,体积为6×10-3m3的西瓜浸没水中,西瓜受到的浮力是____ N,松手后西瓜会____ (上浮/下沉)。(g取10N/kg)