If the frequency of the block is 0.80 hz, what is the earliest time after the block is released that its kinetic energy is exactly one-half of its potential energy?

the answer is 3.1 his answer is wrong mines is right

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

not moving. pos accel,