If the half-life of cesium-137 is 30 years, approximately how much time will be required to reduce a 10 kg sample to about 80 g?

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.

a 2,000 calorie based diet.