một vật dao động cứ sau 0,5 giây vật lại đổi chiều chuyển động hãy xác định nthoiwf gian để vật thực hiện được 50 dao động

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?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?