(1) Thermal energy from the Sun is falling on the ice at a rate of 250 W/m2. The ice absorbs 60% of this energy.
Calculate the energy absorbed in 1.0s by the 0.25 m2 area of ice on the tray.
energy =

dopamine..

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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