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Question

Rubber suckers stick to a smooth surface because
(a) of a special type of glue
(b) rubber is sticky
(c) a partial vacuum is created and the atmospheric pressure keeps it in place
(d) the smooth surface has no friction


Solution

(c) a partial vacuum is created and the atmospheric pressure keeps it in place

Rubber suckers can create partial vacuum and they in remain in place because of atmospheric pressure.

Science
Science in Everyday
Standard VIII

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