Speed of the beam as it passes from one transparent medium to another
Answer: Relative to the bus, you are stationary. Relative to a point on the ground, you are walking forward with velocity equal to the velocity of the bus.
As a person walks toward the back of a bus, they are walking towards a stationary object according to their own perspective. However, from an outside perspective, the bus is moving forward with a constant velocity and so relative to that point in motion, you are actually walking backwards with respect to it. This difference in motion means you would not be able have the same experience as the person on the bus when getting off because when you get off you would stop while they continue going forward. The last sentence could be considered a footnote because it only applies if this was an actual situation rather than just an analogy question in a physics test.
Answer:
and unbalanced force
Explanation:
if balanced then the object will exert as much force as you are. its like pushing against a wall. and unblanced force is like pushing against a chair
Answer:
Explanation:
The equation for the magnetic field at the center of a circular loop is:
If we name the smaller loop as 1 and the bigger loop as 2 and we impose the same magnitude of the magnetic field at their center, we have:
Which for our values means:
(Notice that we don't need to convert cm to m, we get our result in cm).
