It is a fact because I just want to post a question man so I have to answers something pp poop
Answer: B. Time
Explanation: The speed in the independent variable representing the time taken to move somewhere. The time is the dependent variable because it changes on how fast or slow the vehicle moved. Hope this helped.
Answer:
If the ray of light is deflected by 45 degrees by the first mirror its total deflection by mirror (I) is 90 deg. (incident = 45 and exit ray equals 45 deg)
The second mirror will cause a net deflection of 90 degrees and the total deflection will be 180 deg or in opposite direction to the incident ray.
Work done = force x distance = 40 x 2 = 80 Joules.
