Question

Q4. Do as directed.

1) You have been asked to maintain a garden. How will you minimize the use of

water?

2) List any three uses of concave mirror.

3) Do you think an electromagnet can be used for separating plastic bags from a

garbage heap? Explain​

Answer 1

✨Your answer✨:

Explanation:

1. We can try using drip irrigation method. From this method the water directly to the base of the plants using narrow pipes, thereby reducing the loss of water
2. Uses Of Concave Mirror

• Shaving mirrors.
• Head mirrors.
• Ophthalmoscope.
• Astronomical telescopes.
• Headlights.
• Solar furnace.

1. (3)No, electromagnets attract only magnetic substances. Plastic bags are non-magnetic in nature and are not attracted by an electromagnet. Hence, an electromagnet cannot be used for separating plastic bags from a garbage heap.