Question

homework should not be banned from school . prepare a speech

Answer 1

Answer:

The first reason why homework should not be banned is because,homework aims to help us master certain skills. if there is no practice,then excellence will not be achieved. Homework is important because it helps your child develop positive study habits that will serve him or her well throughout life.

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Answer 2

Answer:

When a person cannot see far situated object we assume object distance to infinity.

Then image distance be v = -50cm

u=∞v=−50cm

then,

f1=v1−u1f1=−501f=−50cm=−0.5m    (concave lens)

power=f1=0.51=−2D