3. a man lifts various loads with the same lever. the distance of the applied force from the fulcrum is 2.00 m and
the distance from the fulcrum to the load is 0.500 m. a graph of resistance force vs. effort force is shown.
what is the mechanical advantage of the lever? what is the ideal mechanical advantage of the lever? what is
the efficiency of the lever? show your work.

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Which of these is the best way to manage a natural resource