The answer is in the picture.
A. the same speed as the wave energy
Answer:
don't know what class are you you are using which mobile or laptop
You may confuse two minerals by their colors so using streak is another way for showing their "true colors "
The main cause of this is Friction. The more oil that is laid down, the less friction there is between the ball and the lane surface. The less friction, the harder it is for the bowler to send the ball in a curved path imparted by the spin that the bowler puts on the ball at the instant of release.