9. an 800 kg police boat slows down uniformly from 50 km/h [e] to 20 km/h (e) as it enters a
harbour. if the boat slows down over a 30 m distance, what is the force of friction on the boat?
(hint: you will need to convert the velocities into m/s.)

Like a key in a lock, the shape of the. must bind with the. of the recieving neuron

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.

Anybody wanna ? (picture included? )