Answer:
a) mass=density x volume= 2400 x 0,20=480 Kg
b) weight= 480 x 9,81 = 4708,8 N
Answer:
The total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.
Answer:
79%
Explanation:
Energy expelled / Energy absorbed = 415/525 = 0.79 = 79%
Dispersion-Distributing something over an area.Diffusion-the scattering of light by reflection from a rough surface.
Refraction-<span>Turning or bending of any wave.</span>
Reflection- Image.
<span>The loudness of the sound increases gradually as the air is slowly introduced in to the jar. This is because sound needs a physical medium and in a vacuum there is none. The air provides that medium and as it is introduced, the transfer of sound energy increases</span>
