in an experiment, a ringing bell is placed in a vacuum jar that does not have any air in it. what  best  describes why the bell is seen vibrating but not heard? light waves have high frequencies and are able to pass through the vacuum jar, but the frequencies of sound waves are too low to vibrate a vacuum. light waves travel faster than sound waves, so they are able to travel through the vacuum jar, but sound waves do not have enough energy to vibrate glass. light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present. light is a longitudinal wave that is able to pass through the vacuum jar, but sound is a transverse wave that has to move perpendicular to air.

Explanation:

There are two types of waves.

1. Mechanical waves

2. Non mechanical waves

Mechanical waves are the waves which needs a material medium fro their propagation. For example, sound waves.

Non mechanical waves are the waves which do not need a material medium for their propagation. For example, light waves.

Sound waves are mechanical waves, so they need a medium for their propagation. As there is no medium in the jar, so the sound cannot propagate but the light waves are non mechanical waves, so the bell is seen vibrating.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

the answer is mosques. they are an important part of islamic culture.