Question

Give an example to explain that the use of mordern eco-friendly technologies is more efficient and less polluting.

ICSE Class 9 Physics Chapter Current Electricity

Answer 1

pl refer the attachment

Answer 2

Cloth Napkins: Millions of napkins and diapers are disposed every day in the world, after having been used just once. The trick here is to use reusable products, often made of bamboo or clothes. They are easily washed and as a bonus will keep your baby away from the harmful chemicals used to make classic diapers.

2. Cloth or Cotton Shopping Bags: Well when it comes to shopping bags, you only have to stop using one-time plastic bags. Carry with you a cloth or cotton mesh bag to avoid any trouble. Actually, some supermarkets and shops have already made a move towards stopping to give plastic bags away, or are charging them to deter people from using too many of them.

3. Gota Dishwasher: The Gota dishwasher created by Yanko Designs looks like a little spaceship, but it actually cleans the dirty dishes by steaming them in the pre-washing cycle and keeping the water to reuse it in later phases.

4. Recycled Fabric Clothes: Buy clothes that are made from organic or recycled fabrics. This is usually signaled by a logo, a seal, or it is mentioned on the tag.

5. Nuwave Precision Induction Cooktop: The NuWave Precision Induction Cooktop (PIC) uses induction technology to reduce the amount of electricity required to cook foods traditionally prepared on electric stove. The secret is an internal copper coil. This coil generates a magnetic field within your steel and iron-based pots and pans. The magnetic field causes molecules in the pots and pans to begin vibrating rapidly, creating heat, so the cookware itself heats the food. In this way, heat is generated in the cookware and not on the cooktop surface, a process which is much more energy-efficient than cooking with traditional gas or electric ranges.

6. Rechargeable Batteries: As batteries remain complicated to recycle and contain a significant number of dangerous metals such as lead, prefer the use of rechargeable batteries. The latter will cost a bit more when you get them, but in the long run you will protect the environment while saving some cash.