Acoustics — Science STD 10 — Question

What is Richmond Lang effect?

Which law explains the following situation, Athlete runs a certain distance before long jump.

It is easier to stop a tennis ball than a cricket ball moving with the same velocity.

What is normal heart beat in man? How does it occur?

How are neurons categorized on the basis of functions?

While travelling through a curved path, passengers in a bus tend to get thrown to one side. Justify.

What do you mean by triple point of water? Why it is unique?

The supra pharyngeal ganglion lies below the Pharynx and is formed by the fusion of four pairs of Ganglia.

When the lead powder is added to copper chloride solution, a displacement reaction occurs and solid copper is formed.
(i) Write the equation for the reaction.
(ii) Why does the displacement reaction occur?

What is an amalgam? Give one example with its use.