Freya is investigating different types of insulators. She wraps different insulators around a metal can of hot water. At the start the water is at 90 °C. She measures the how long it takes for the temperature to reach 60 ° C.

State the type of energy transfer through the metal can
Material: Paper, Cotton, Foam, Wool
Time to drop to 60(seconds): 4,7,15,10
Please help im really stuc

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?