Answer is c that is he particles move perpendicular to the direction of the wave.
Answer:
Reflection is when light bounces off an object, while refraction is when light bends while passing through an object.
Explanation:
Speed of Bob, v = 0.967 c
At the exact instant he passes Alice, she fires a very short laser pulse in the same direction Bob is moving.
(a) We need to find the distance measured by Alice between Bob and the laser pulse. It is given by :




(b) Distance measured by Bob between himself and the laser pulse is given by :



Hence, this is the required solution.
A land form is a natural feature of earths surface and a land mark is can be man-made or natural and it is used to mark something significant.
The answer is A........The sound is transferred by collisions of molecules. Therefore sound waves will travel faster on warm air because collisions of molecules of air in warm air are greater.