Explanation

• The electrons that have been knocked out of the outermost shell of an atom are free electrons, which are able to move freely and conduct electricity.

Explanation

• The movement of free electrons is defined as electric current, which is the flow of electrons through a conductor, such as a wire.
• Electric charge refers to the property of matter, electric field is the force that surrounds charged particles, and electric potential is the potential energy per unit charge.

Explanation

The rate of flow of charge at a certain point is defined as electric current, measured in amperes (A).

Explanation

The audible range of normal bat ear is: 20 kHz to 110 kHz.

Explanation

• Dolphins have a wide audible range that is adapted to their aquatic environment.
• They can hear sounds in the range of 20 Hz to 120,000 Hz, which is far beyond the human audible range.

Explanation

• Cats have a unique audible range that is adapted to their hunting and communication needs.
• They can hear sounds in the range of 45 Hz to 64,000 Hz, which is wider than humans and dogs.

Explanation

Dogs can hear sounds in the range of 67 Hz to 45,000 Hz, which is slightly higher than the human audible range.

Explanation

• Whales have a unique audible range that is adapted to their underwater environment.
• They can hear sounds at very low frequencies, often below 20 Hz, and up to 31 kHz.

Explanation

Explanation

• The audible range of a normal human ear is typically considered to be between 20 Hz (very low frequency) and 20,000 Hz (very high frequency).
• This range encompasses the vast majority of sounds that humans can perceive, from the lowest rumble to the highest pitch.