Rain falls, being trapped behind dams 1 2. turbines generate electrical energy 3 3. heat evaporates water from oceans 4 4. potential energy of water behind dam converted into kinetic energy by turning turbi

found in the nucleus

has mass of one amu

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle