Achild makes a ramp to push his toy dump truck up to his sandbox if he uses 5 newtons of force to push the 12 newton truck up the ramp what is the mechanical advantage of his ramp

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°