1. Magnets are being used in so many new and innovative ways. Write about the latest
developments using magnet.
2. “An object in rotational motion need not have periodic motion”. Do you agree? Discuss
with an example.
3. Human beings are animals that can survive in any habitat. Write a few lines to support
this statement.
4. In what way is the shadow of an object similar to its image? In what way is it different?
5. Electricity is very useful, but it can be very dangerous also. Comment.
Answers
Explanation:
1. Magnets are being used in so many new and innovative ways. Write about the latest
developments using magnet.
=>Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people's bodies.
2. “An object in rotational motion need not have periodic motion”. Do you agree? Discuss with an example.
=>No. Generally rotational motion is a periodic motion. Periodic motion is a motion that repeats itself at regular time intervals. ... For example the earth moves for 24hrs in one rotation and that is fixed for it.
3. Human beings are animals that can survive in any habitat. Write a few lines to support this statement.
=> yes,human beings are animals that can survive in any habitat because wherever they require water to drink,food to eat and shelter to live like other animals do, they live their and survive in that place. Wherever we get water,food or shelter,anyone can start live there.
4. In what way is the shadow of an object similar to its image? In what way is it different?
=>Image has the same colour as the object. Shadow is always black or grey, independent of object. An image has not only the same shape as an object but also all the details similar to that of the object. The shape of shadow is similar to that of an object, but has no other details visible.
5. Electricity is very useful, but it can be very dangerous also. Comment.
=>yes electricity is useful because it helps people in everyday life activities . ... main thing that is effected by electricity is our mobile phone which is our life . but it is dangerous also because if we touch live wires it gives us huge shock which is also cause death ..