I think it would be b. Plz mark Brainly ist

**Answer:**

<em>**Yes, work has been done on the mud.**</em>

<em></em>

**Explanation:**

Work is done on a body, when a force is applied on the body to move it through a certain distance. In the case of the mud, the tire exerts a centripetal force on the mud. The centripetal force moves the mud along a path that follows the circle formed by the tire in one revolution of the tire. The total distance traveled is the circumference of the circle formed. <em>**The work done on the mud is therefore the product of the centripetal force on the mud from the tire, and the circumference of the circle formed by the tire, usually expressed in radian.**</em>

#1

Wavelength = 13 km

it vibrates 10 times each minute

so the frequency is defined by the number of vibrations per second

now the speed of wave is defined as

<em>**so here velocity of wave is 2.2 km/s**</em>

#2

Intensity of wave is directly proportional to the square of its amplitude

so we can say

k = constant

so if amplitude is doubled then its intensity will be increased by its square

<em>**so intensity is 4 times**</em>