Questions:
1. Which mathematical statements are linear inequalities in two variables? Linear
equations in two variables?
2. How did you identify linear inequalities in two variables and linear equations in
two variables?
3. In what way does y s 7x + 21 differ from y = 7x + 21? How about
3y - 7 < 5x and 3y - 7 = 5x?
4. How do you differentiate linear inequalities in two variables from linear
equations in two variables?
Need help please....
Answers
Answer:
Hot tea gets cool over time due to evaporation - hot molecules on the surface gets evaporated taking away heat with them.
2) Wet clothes dry in sun due to evaporation - the water in wet clothes takes heat energy from sun and gets evaporated.
3) Evaporation of perspiration from body - Sweat on our body evaporates taking away heat from our body
4) Drying of a mopped floor
5) Drying of wet hair after some time
6) drying up of water bodies like lakes and rivers
7) Evaporation of water from earthen pots
8) Evaporation of water sprinkled on ground or roof top
9) Evaporation of nail paint remover when applied on nails - acetone in nail paint remover takes heat from our body and evaporates.
10) Preparation of common salt from sea water by evaporation
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