Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard?

On the moon, sound cannot travel as there is no atmosphere. Sound cannot travel in vacuum so we will not be able to hear any sound.

s ; 340 m s-1 × 10 s = 3400 m or 3.4 km

This is because velocity of sound is much greater than the velocity of car.

(a) No, the person standing nearby would not be able to hear the whistle as there is no atmosphere on the moon. Sound waves needs medium for travelling, but the...

Time Period given by the inverse of the frequency.  Time Period= 1/Frequency of oscillation = 1/500 = 0.002 sec

Sweater is made of wool and generally shirt we wear is made of cotton blended with some synthetic fibers. Constant friction between the shirt and sweater lets transfer of electrons...

The pendulum's period depends on the length of the rod, and  it changes between summer and winter, as the rod expands and contracts with changes in temperature.  Rods get longer in...

(i) In my opinion the above approach of society is baseless. Sex of child is determined by type of chromosome present in sperm (X or Y) that fuses with ovum...

The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls;...