Answer:
They all travel at the same speed
Explanation: the speed of light — in a vacuum, but when they come into contact with matter, they slow down. ... Opaque objects transmit little or no visible light, translucent objects transmit some, and transparent objects transmit almost all, which is why we can see through them.
Answer: 0 J
Explanation: there’s no movement if it’s a wall
Divide 2500 g by 500 cc. The quotient is 5 g/cc ... the density.