1.)Give two examples for 'force can change shape of objecť.
2.)Write the consequences if aeroplanes are not in the shape of bird.
3.)Where the polyester 'PET' is used in our daily life?
4.)Draw a figure showing the image formed by a point object by plane mirror.
5.)What are requirements for fine coating in electroplating?
6.What are the causes of lightning?
Answers
Answer:
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Explanation:
(1)
- Stretching the rubber band, changes its shape.
- Plastic bottles change theirshape when squeezed.
3)Polyesters are also used to make bottles, films, tarpaulin, sails (Dacron), canoes, liquid crystal displays, holograms, filters, dielectric film for capacitors, film insulation for wire and insulating tapes.
4)answer is on the attachment.
5)Requiredmaterials for electroplating are - battery or electric supply, cathode, anode and salt solution of material to be coated.
6)Lightning is an electrical dischargecaused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightningoccurs within the clouds. ... This heatcauses surrounding air to rapidly expand and vibrate, which creates the pealingthunder we hear a short time after seeing a lightning flash.
