answersLogoWhite

0


Best Answer

Because neither the grate or window-screen are smooth surfaces. A suction cup (or similar device) needs a smooth, non-porous surface in order to form an air-tight seal.

User Avatar

Wiki User

โˆ™ 2013-06-14 10:04:47
This answer is:
User Avatar
Study guides

Physics

20 cards

Which term explains whether an object's velocity has increased or decreased over time

Which of these is a characteristic of nonmetals

What is the only factor needed to calculate change in velocity due to acceleration of gravity 9.8 ms

What term is used to describe splitting a large atomic nucleus into two smaller ones

โžก๏ธ
See all cards
4.11
โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…
174 Reviews

Add your answer:

Earn +20 pts
Q: Why doesn't a suction cup hold to a window screen or to a grate?
Write your answer...
Submit
Still have questions?
magnify glass
imp
People also asked