Cheryl runs a race on a circular 400.0 m track. She starts running east at the starting line and stops 20.0 m west of the starting line. Her time is 80 s. What is her average
speed?
O 0.21 m/s
-0.21 m/s
50 m/s
4.8 m/s

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

True or false graphs must include scales that increase by the same amount

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?