Question
Name any two objects which are good reflectors of sound.

Answer

Metal sheet, hard wood are good reflectors of sound.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Give the characteristics of gravitational force.
Calculate the pressure when a force of $200N$ is exerted on an area of: $(i)\ 10m^2\ (ii)\ 5m^2.$
The echo of a sound is heard after 5 seconds. If the speed of sound in air be 342m/s, calculate the distance of the reflecting surface.
If a 50W bulb is lighted for 3h daily. Give the energy consumed in 30 days.
Why do plant cells possess large sized vacuole?
What is meant by atomicity? Explain with two examples.
What are the consequences of the following condition?
A cell having equal water concentration to its surrounding medium.
Akhtar, Kiran and Rahul were riding in a motorcar that was moving with a high velocity on an expressway when an insect hit the windshield and got stuck on the windscreen. Akhtar and Kiran started pondering over the situation. Kiran suggested that the insect suffered a greater change in momentum as compared to the change in momentum of the motorcar $($because the change in the velocity of the insect was much more than that of the motorcar$).$ Akhtar said that since the motorcar was moving with a larger velocity, it exerted a larger force on the insect. And as a result the insect died. Rahul while putting an entirely new explanation said that both the motorcar and the insect experienced the same force and a change in their momentum. Comment on these suggestions.
The given graph $($Fig.$)$ shows the displacement versus time relation for a disturbance travelling with velocity of $1500 \ m s^{–1}.$ Calculate the wavelength of the disturbance.
Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.