Question
What do you understand by loud and soft sound?
✓
Answer
Louder sound: - Sound which has a higher amplitude and high energy are called louder sound.
Softer sound: - Sound which has lesser amplitude and less energy are called soft sound.
Softer sound: - Sound which has lesser amplitude and less energy are called soft sound.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The valencies (or charges) of some of the ions are given below:
Using this information, write down the formulate of the following compounds:
→|
Ion
|
Valency(Charges)
|
Ion
|
Valency(Charge)
|
|
Sodium ion
|
$1+$
|
Bromide ion
|
$1-$
|
|
Ammonium ion
|
$1+$
|
Hydroxide ion
|
$1-$
|
|
Calcium ion
|
$2+$
|
Sulphate ion
|
$2-$
|
|
Lead ion
|
$2+$
|
Phosphate ion
|
$3-$
|
- Sodium phosphate.
- Ammonium sulphate.
- Calcium hydroxide.
- Lead bromide.
An object of mass $40kg$ is raised to a height of 5m above the ground. What is its potential energy$?$ If the object is allowed to fall, find its kinetic energy when it is half-way down.
→A force of $5N$ is acting on an object. The object is displaced through $2m$ in the direction of the force. If the force acts on the object all through the displacement, then work done is $5N × 2m = 10Nm$ or $10J.$
→Why are plant and animal tissues different?
Composition of the nuclei of two atomic species $A$ and $B$ is given as under:
Give the mass numbers of $A$ and $B$. What is the relation between the two species and which element or elements they represent?
→|
|
$A$
|
$B$
|
|
Protons
|
$18$
|
$20$
|
|
Neutrons
|
$22$
|
$20$
|
- Identify the tissue.
- Labels the parts marked $1, 2$ and $3.$
- What type of this tissue and where it occurs in body.
How fast should a man of $50\ kg$ run so that his kinetic energy be $625\ J?$
→Complete the following equations which describe nuclear charge-
a. ${ }_{11}^{23} N a+{ }_0^1 n \rightarrow \ldots+{ }_{-1}^0 e$
a. ${ }_{11}^{23} N a+{ }_0^1 n \rightarrow \ldots+{ }_{-1}^0 e$
b. ${ }_4^9 Be +{ }_2^4 He \rightarrow{ }_0^1 n+$___ $\qquad$
c. ${ }_8^{16} O +{ }_0^1 n \rightarrow \ldots+{ }_2^4 He$
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.
Give one use each of the following radioactive isotopes:
→- Uranium-$235$
- Cobalt–$60$