Answer: An electric current produces a magnetic field and A moving magnet produces an electric current.
Explanation:
answer d. down hill schussing
Explanation:
I took the quiz
Average speed = (total distance) / (total time)
Total distance = (70km + 104km + 79km) = 253 km
Total time = (2hr + 1.5hr + 2hr) = 5.5 hrs
Average speed = (253 km) / (5.5 hrs)
<em>Average speed = 46 km/hr</em>
For the position of button we can use force balance as
Friction Force = Centripetal force
so here we will have

here we know that
R = radius of circle where button is placed

f = 35 rev/min


now from above equation


so friction coefficient will be 0.33