Wall Clings

Wall Clings

Physics questions about attraction and repulsion?

I have the basic idea, but I can't seem to put it into words.

1. Which effect proves more conclusively that an object is charged, attraction or repulsion from another object? Explain.

2. A balloon is negatively charged by rubbing and then clings to a wall. Does this mean that the wall is positively charged?

3. Because of a higher moisture content, air is a better conductor of charge in the summer than in the winter. Would you expect the shocks from static electricity to be more severe in summer or winter? Explain your answer.

Remember: Opposites attract, Likes repel, neutrals can attract both depending on the material. This area becomes a bit of a mine field for me. My hypotheses are bit off the beaten track.

1)Either/neither. Remember the five ball bearings suspended from two overhead poles. Lift the one end, the bearing falls, the bearing on the opposite end flies up. Then back and forth the ends go. An electromagnetic force can act on a neutral and be attracted to most iron bearing alloys. This would tend toward repulsion as a better choice except those objects could carry a magnetic field without carrying a charge. Hence a DRAW.

2) Yes the wall would have to be slightly positive, at least. Haven't you ever tried to 'stick' a balloon to the wall and have it just fall off? Like charges.

3) The drier the air the more severe the shock. It takes a higher potential (voltage) to jump a gap of dry air than moist air. In fact the shock can drop to zero in a humid environment. There are some other smaller factors such as temperature, air movement, and relative humidity changes.

I hope that makes sense.

Amazing Lucario Wall Cling

Designer Wall Hanging Wooden Photo Frame for 12 Pictures

Picture perfect

Frame a lifetime of bygone moments together forever.

Amar Mehta's heart was a mixture of joy and pain. It reminded him of a day 25 years back when his daughter Rimi was born. He stared at the 'Designer Wall Hanging Wooden Photo Frame for 12 Pictures' in his room. Rimi had gifted it to him on his birthday. It was full of her pics. The first one was a black and white picture of the then baby girl. A small, innocent bundle with tiny hands curled up in tight fists. That same baby girl of his, Rimi, was getting married today.

Pain is a physical thing. It passes with time. But happiness stays. With the celebrations in full swing downstairs, one could hear the guests moving around and girls singing. The bharatis were expected in a few hours from now. He stood still. Eyes glued to the beautiful, wooden Designer Wall Hanging Photo Frame in front of him. The second picture was of Rimi, the toddler. Cuddled in her Mom's lap in her diapers.

In three more hours, maybe four, she would be gone. As a father, his heart was an ocean of emotions. The third 6 x 4-inch picture beckoned him. His six-year-old daughter in her yellow frock and an orange water-bottle around her neck, on her first day to school. Clinging tightly to Daddy. He was and would always remain her ultimate hero.

His eyes moved further. There were six landscape and six portrait pics in all. One was a toothless Rimi being awarded Miss Fancy Dress in her 2nd standard. Then a lanky Rimi in her early teens. A school farewell pic, Rimi submerged in her mom's blue saree, smiling shyly at the camera.

The bride would be dressed by now in her red lehenga. His eyes rushed towards the door and then back to the Designer Photo Frame on the wall. The next picture was a landscape family photo. A slightly grey headed him and his wife with their young daughter. More pics of her college days. Their little daughter was a young lady by now. Full of life, full of ideas.

The Designer Photo Frame had captured all the special moments of her time in that house. All the years that had flown by, were captured right there in the Photo Frame for him to cherish. At this moment his wife walked in, together they looked at their daughter's life-story spread across these pictures. One space was still vacant. At this moment someone called them downstairs. The beautiful bride was entering the hall. Amar looked into his wife's eyes and smiled. Time for filling the last space in the frame.

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