On the circuit below, what is the current measured by the ammeter? Each resistor is 50 ohms, and the battery is 50 volts.
A. 0.15 amperes
B. 0.21 amperes
C. 0.27 amperes
D. 0.36 amperes

Which one of the following research methods can show cause and effect

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above