Whats's the internal heat gain in kW from a heat factory with 20kW of surface-mounted lighting, 10kW of running electric motors, and 10 people doing light benchwork? A.23.8 B. 20.0 C.20.8 D.17.8

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.