Q141. The temperature difference between two ends of \(50\: cm\) long rod is \(100^\circ C\). The temperature gradient will be_________

Q142. Frequency of sound is 512 Hz. If the velocity of sound in air is 330 m/s. Then wavelength of sound is                  .

Q143. A wave that travels continuously through a medium in the same direction without a change in its amplitude is referred to as a _________.

Q144. Which of the following statements is true regarding the coefficient of linear expansion?

Q145. A body in                           produces sound.

Q146. A good absorber of radiation is__________of radiation.

Q147. The law of reflection states that the angle of incidence is always _______ the angle of reflection.

Q148. When crests of one wave align with the troughs of another, leading to a cancellation or reduction in the overall wave amplitude, it is called ________.

Q149. Formula for capacitance of capacitor is _________.

Q150. Which relation is correct?