You walk east for 30 m, then decide to walk north foranother 30 m. What is the angle of direction of your displacement?

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Why does a collision with an airbag cause less damage than a collision with a steering wheel

On his honeymoon, james joule attempted to explore the relationships between various forms of energy by measuring the rise of temperature of water which had fallen down a waterfall on mount blanc. what maximum temperature rise would one expect for a waterfall with a vertical drop of 20 m? the specific heat of water is 4186 j/kg ∙ k. a)0.064 c° b)0.053 c° c)0.071 c° d)0.047 c°