What was aristotle's air engine? a. a device using pneumatics. b. a theoretical model for the transmission of sound. c. an explanation for the movement of an arrow. d. a way of accounting for wind without resort to deities.

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

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.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle