A thermometer with an arbitrary scale has ice point marked as – 20o and steam point as 180o. If the temperature measured by this thermometer is 5o , the corresponding reading on the celsius scale is?.

Since the pully is a simple machine so the mechanical advantage is a 1

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.