One end of a 50 kg mass is attached to two vertical springs in parallel. each spring has a spring constant of 20 n/m. when the spring is pulled back and released, what is the spring’speriod?
a. 14.049 s
b. 7.02 s
c. 14 s
d. 7.0 s
e. 0.14 s

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.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide