"A switch-mode dc-dc converter uses a PWM-controller IC that has a triangular waveform signal at 25 kHz with V^tri 5 1.5 V. If the input dc source voltage Vd = 150 V, calculate the gain kPWM in Equation 12.19 of this switch-mode amplifier"

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

What is the main objective of using reheat rankine cycle?

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false