Electromagnetic waves do not require a medium in order to transport their energy. Mechanical waves are waves that require a medium in order to transport their energy from one location to another. ... Sound is a mechanical wave and cannot travel through a vacuum.

6 0

3 years ago

A 2-kg book falls off a shelf. it hits a student traveling 2 m/s. how much kinetic energy does the book have?

jekas [21]

Kinetic energy = 1/2 * m * V^2

K = 1/2 * 2kg * 4

5 0

3 years ago

A loaded truck is going at a speed of 36 km/hr and a car starts at a point 3 km behind the truck with an acceleration 2 m/s^2 .

kozerog [31]

It's 3600 m and 60 sec

6 0

3 years ago