Arti cut out sheets of the same size from four different materials. She arranged them in a straight line as shown.
She then made a crescent-shaped hole in sheet W. She then shone torchlight on set-up and saw a bright crescent-shaped patch of light on sheet Y only. Select the option that correctly identifies the materials of which sheets W, X, Y and Z are made up of.
|A||Metal||Clear plastic||Frosted glass||Cardboard|
|B||Cardboard||Frosted glass||Clear plastic||Metal|
|C||Cardboard||Clear plastic||Metal||Frosted glass|
|D||Frosted glass||Metal||Cardboard||Clear plastic|
i did c
Complete the passage using the suitable words given in option below.
A rough surface will offer a (i) frictional force than a smooth surface. The heavier the object, the (ii) will be the frictional force. Friction is a (iii) force.
Study the given Venn diagram. X is likely to be ____________.
A A group of people smoking cigarettes
B Youngsters dancing in disco
C A farmer spraying pesticides near a river
D Construction work going on at a building site
Can anyone explain how D causes water pollution
Match column I with column II and select the correct option from the codes given below.