Which of the following measurements changes based on the strength of gravity? a. mass b. size c. length d. weight

Weight. As a scientific term Weight is referred to as the force that Earth and objects have with each other. Your weight can be different on other planets.

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.