PLEASE HURRY! IT'S TIMED! ABOUT TRANSFORMERS... The primary of an ideal transformer has 100 turns and the secondary has 600 turns. Then;
Select one:
a. the currents in the two circuits are the same
b. the power in the primary circuit is less than that in the secondary circuit
c. the primary current is six times the secondary current
d. the voltages in the two circuits are the same

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.

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

What is the relationship between the direction of motion of the balloon and the wind currents