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Figure 8.2 shows a child blowing air with a straw near the opening of another straw which has its other end in a soft drink bottle. It was observed that the level of the soft drink in the straw rises up as soon as air is blown over its open end. Which one of the following best explains the reason for rise in level of the drink?

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If we open a bottle of perfume, its smell spreads in the entire room with in a short time due to the process of

A rocket is intended to leave the Earth's garvitational field.The fuel in its main engine is a little less than the amount that is necessary and an auxliary engine, (only capable of operating for a short time) has to be used as well.When is it best to switch on the auxiliary engine?

Unique enterprise is dealing in auto spare parts. With the expansion in business the enterprise found that the decisions are delayed and level of coordination is coming down. The CEO of the company called for a meeting of all the managers. Ayush, a newly appointed manager suggested that company should have its own internet so that all the employees can interact and pass important information to each other through internet. Even short meeting of different departments can be conducted through Video conferencing to take fast action. The CEO linked the idea and installed an internet connection for connecting all the employees on line. Which type of e-commerce is suggested by Mr Ayush? Explain.